Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

13 files changed, 8186 insertions, 0 deletions

diff --git a/third_party/aom/aom_dsp/simd/v128_intrinsics.h b/third_party/aom/aom_dsp/simd/v128_intrinsics.h
new file mode 100644
index 0000000000..01dbb8fd27
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v128_intrinsics.h
@@ -0,0 +1,344 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V128_INTRINSICS_H_
+#define AOM_AOM_DSP_SIMD_V128_INTRINSICS_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "aom_dsp/simd/v128_intrinsics_c.h"
+#include "aom_dsp/simd/v64_intrinsics.h"
+
+/* Fallback to plain, unoptimised C. */
+
+typedef c_v128 v128;
+
+SIMD_INLINE uint32_t v128_low_u32(v128 a) { return c_v128_low_u32(a); }
+SIMD_INLINE v64 v128_low_v64(v128 a) { return c_v128_low_v64(a); }
+SIMD_INLINE v64 v128_high_v64(v128 a) { return c_v128_high_v64(a); }
+SIMD_INLINE v128 v128_from_64(uint64_t hi, uint64_t lo) {
+  return c_v128_from_64(hi, lo);
+}
+SIMD_INLINE v128 v128_from_v64(v64 hi, v64 lo) {
+  return c_v128_from_v64(hi, lo);
+}
+SIMD_INLINE v128 v128_from_32(uint32_t a, uint32_t b, uint32_t c, uint32_t d) {
+  return c_v128_from_32(a, b, c, d);
+}
+
+SIMD_INLINE v128 v128_load_unaligned(const void *p) {
+  return c_v128_load_unaligned(p);
+}
+SIMD_INLINE v128 v128_load_aligned(const void *p) {
+  return c_v128_load_aligned(p);
+}
+
+SIMD_INLINE void v128_store_unaligned(void *p, v128 a) {
+  c_v128_store_unaligned(p, a);
+}
+SIMD_INLINE void v128_store_aligned(void *p, v128 a) {
+  c_v128_store_aligned(p, a);
+}
+
+SIMD_INLINE v128 v128_align(v128 a, v128 b, unsigned int c) {
+  return c_v128_align(a, b, c);
+}
+
+SIMD_INLINE v128 v128_zero() { return c_v128_zero(); }
+SIMD_INLINE v128 v128_dup_8(uint8_t x) { return c_v128_dup_8(x); }
+SIMD_INLINE v128 v128_dup_16(uint16_t x) { return c_v128_dup_16(x); }
+SIMD_INLINE v128 v128_dup_32(uint32_t x) { return c_v128_dup_32(x); }
+SIMD_INLINE v128 v128_dup_64(uint64_t x) { return c_v128_dup_64(x); }
+
+typedef uint32_t sad128_internal;
+SIMD_INLINE sad128_internal v128_sad_u8_init() { return c_v128_sad_u8_init(); }
+SIMD_INLINE sad128_internal v128_sad_u8(sad128_internal s, v128 a, v128 b) {
+  return c_v128_sad_u8(s, a, b);
+}
+SIMD_INLINE uint32_t v128_sad_u8_sum(sad128_internal s) {
+  return c_v128_sad_u8_sum(s);
+}
+typedef uint32_t ssd128_internal;
+SIMD_INLINE ssd128_internal v128_ssd_u8_init() { return c_v128_ssd_u8_init(); }
+SIMD_INLINE ssd128_internal v128_ssd_u8(ssd128_internal s, v128 a, v128 b) {
+  return c_v128_ssd_u8(s, a, b);
+}
+SIMD_INLINE uint32_t v128_ssd_u8_sum(ssd128_internal s) {
+  return c_v128_ssd_u8_sum(s);
+}
+SIMD_INLINE int64_t v128_dotp_su8(v128 a, v128 b) {
+  return c_v128_dotp_su8(a, b);
+}
+SIMD_INLINE int64_t v128_dotp_s16(v128 a, v128 b) {
+  return c_v128_dotp_s16(a, b);
+}
+SIMD_INLINE int64_t v128_dotp_s32(v128 a, v128 b) {
+  return c_v128_dotp_s32(a, b);
+}
+SIMD_INLINE uint64_t v128_hadd_u8(v128 a) { return c_v128_hadd_u8(a); }
+
+SIMD_INLINE v128 v128_or(v128 a, v128 b) { return c_v128_or(a, b); }
+SIMD_INLINE v128 v128_xor(v128 a, v128 b) { return c_v128_xor(a, b); }
+SIMD_INLINE v128 v128_and(v128 a, v128 b) { return c_v128_and(a, b); }
+SIMD_INLINE v128 v128_andn(v128 a, v128 b) { return c_v128_andn(a, b); }
+
+SIMD_INLINE v128 v128_add_8(v128 a, v128 b) { return c_v128_add_8(a, b); }
+SIMD_INLINE v128 v128_add_16(v128 a, v128 b) { return c_v128_add_16(a, b); }
+SIMD_INLINE v128 v128_sadd_u8(v128 a, v128 b) { return c_v128_sadd_u8(a, b); }
+SIMD_INLINE v128 v128_sadd_s8(v128 a, v128 b) { return c_v128_sadd_s8(a, b); }
+SIMD_INLINE v128 v128_sadd_s16(v128 a, v128 b) { return c_v128_sadd_s16(a, b); }
+SIMD_INLINE v128 v128_add_32(v128 a, v128 b) { return c_v128_add_32(a, b); }
+SIMD_INLINE v128 v128_add_64(v128 a, v128 b) { return c_v128_add_64(a, b); }
+SIMD_INLINE v128 v128_padd_u8(v128 a) { return c_v128_padd_u8(a); }
+SIMD_INLINE v128 v128_padd_s16(v128 a) { return c_v128_padd_s16(a); }
+SIMD_INLINE v128 v128_sub_8(v128 a, v128 b) { return c_v128_sub_8(a, b); }
+SIMD_INLINE v128 v128_ssub_u8(v128 a, v128 b) { return c_v128_ssub_u8(a, b); }
+SIMD_INLINE v128 v128_ssub_s8(v128 a, v128 b) { return c_v128_ssub_s8(a, b); }
+SIMD_INLINE v128 v128_sub_16(v128 a, v128 b) { return c_v128_sub_16(a, b); }
+SIMD_INLINE v128 v128_ssub_s16(v128 a, v128 b) { return c_v128_ssub_s16(a, b); }
+SIMD_INLINE v128 v128_ssub_u16(v128 a, v128 b) { return c_v128_ssub_u16(a, b); }
+SIMD_INLINE v128 v128_sub_32(v128 a, v128 b) { return c_v128_sub_32(a, b); }
+SIMD_INLINE v128 v128_sub_64(v128 a, v128 b) { return c_v128_sub_64(a, b); }
+SIMD_INLINE v128 v128_abs_s16(v128 a) { return c_v128_abs_s16(a); }
+SIMD_INLINE v128 v128_abs_s8(v128 a) { return c_v128_abs_s8(a); }
+
+SIMD_INLINE v128 v128_mul_s16(v64 a, v64 b) { return c_v128_mul_s16(a, b); }
+SIMD_INLINE v128 v128_mullo_s16(v128 a, v128 b) {
+  return c_v128_mullo_s16(a, b);
+}
+SIMD_INLINE v128 v128_mulhi_s16(v128 a, v128 b) {
+  return c_v128_mulhi_s16(a, b);
+}
+SIMD_INLINE v128 v128_mullo_s32(v128 a, v128 b) {
+  return c_v128_mullo_s32(a, b);
+}
+SIMD_INLINE v128 v128_madd_s16(v128 a, v128 b) { return c_v128_madd_s16(a, b); }
+SIMD_INLINE v128 v128_madd_us8(v128 a, v128 b) { return c_v128_madd_us8(a, b); }
+
+SIMD_INLINE uint32_t v128_movemask_8(v128 a) { return c_v128_movemask_8(a); }
+SIMD_INLINE v128 v128_blend_8(v128 a, v128 b, v128 c) {
+  return c_v128_blend_8(a, b, c);
+}
+
+SIMD_INLINE v128 v128_avg_u8(v128 a, v128 b) { return c_v128_avg_u8(a, b); }
+SIMD_INLINE v128 v128_rdavg_u8(v128 a, v128 b) { return c_v128_rdavg_u8(a, b); }
+SIMD_INLINE v128 v128_rdavg_u16(v128 a, v128 b) {
+  return c_v128_rdavg_u16(a, b);
+}
+SIMD_INLINE v128 v128_avg_u16(v128 a, v128 b) { return c_v128_avg_u16(a, b); }
+SIMD_INLINE v128 v128_min_u8(v128 a, v128 b) { return c_v128_min_u8(a, b); }
+SIMD_INLINE v128 v128_max_u8(v128 a, v128 b) { return c_v128_max_u8(a, b); }
+SIMD_INLINE v128 v128_min_s8(v128 a, v128 b) { return c_v128_min_s8(a, b); }
+SIMD_INLINE v128 v128_max_s8(v128 a, v128 b) { return c_v128_max_s8(a, b); }
+SIMD_INLINE v128 v128_min_s16(v128 a, v128 b) { return c_v128_min_s16(a, b); }
+SIMD_INLINE v128 v128_max_s16(v128 a, v128 b) { return c_v128_max_s16(a, b); }
+SIMD_INLINE v128 v128_min_s32(v128 a, v128 b) { return c_v128_min_s32(a, b); }
+SIMD_INLINE v128 v128_max_s32(v128 a, v128 b) { return c_v128_max_s32(a, b); }
+
+SIMD_INLINE v128 v128_ziplo_8(v128 a, v128 b) { return c_v128_ziplo_8(a, b); }
+SIMD_INLINE v128 v128_ziphi_8(v128 a, v128 b) { return c_v128_ziphi_8(a, b); }
+SIMD_INLINE v128 v128_ziplo_16(v128 a, v128 b) { return c_v128_ziplo_16(a, b); }
+SIMD_INLINE v128 v128_ziphi_16(v128 a, v128 b) { return c_v128_ziphi_16(a, b); }
+SIMD_INLINE v128 v128_ziplo_32(v128 a, v128 b) { return c_v128_ziplo_32(a, b); }
+SIMD_INLINE v128 v128_ziphi_32(v128 a, v128 b) { return c_v128_ziphi_32(a, b); }
+SIMD_INLINE v128 v128_ziplo_64(v128 a, v128 b) { return c_v128_ziplo_64(a, b); }
+SIMD_INLINE v128 v128_ziphi_64(v128 a, v128 b) { return c_v128_ziphi_64(a, b); }
+SIMD_INLINE v128 v128_zip_8(v64 a, v64 b) { return c_v128_zip_8(a, b); }
+SIMD_INLINE v128 v128_zip_16(v64 a, v64 b) { return c_v128_zip_16(a, b); }
+SIMD_INLINE v128 v128_zip_32(v64 a, v64 b) { return c_v128_zip_32(a, b); }
+SIMD_INLINE v128 v128_unziplo_8(v128 a, v128 b) {
+  return c_v128_unziplo_8(a, b);
+}
+SIMD_INLINE v128 v128_unziphi_8(v128 a, v128 b) {
+  return c_v128_unziphi_8(a, b);
+}
+SIMD_INLINE v128 v128_unziplo_16(v128 a, v128 b) {
+  return c_v128_unziplo_16(a, b);
+}
+SIMD_INLINE v128 v128_unziphi_16(v128 a, v128 b) {
+  return c_v128_unziphi_16(a, b);
+}
+SIMD_INLINE v128 v128_unziplo_32(v128 a, v128 b) {
+  return c_v128_unziplo_32(a, b);
+}
+SIMD_INLINE v128 v128_unziphi_32(v128 a, v128 b) {
+  return c_v128_unziphi_32(a, b);
+}
+SIMD_INLINE v128 v128_unpack_u8_s16(v64 a) { return c_v128_unpack_u8_s16(a); }
+SIMD_INLINE v128 v128_unpacklo_u8_s16(v128 a) {
+  return c_v128_unpacklo_u8_s16(a);
+}
+SIMD_INLINE v128 v128_unpackhi_u8_s16(v128 a) {
+  return c_v128_unpackhi_u8_s16(a);
+}
+SIMD_INLINE v128 v128_unpack_s8_s16(v64 a) { return c_v128_unpack_s8_s16(a); }
+SIMD_INLINE v128 v128_unpacklo_s8_s16(v128 a) {
+  return c_v128_unpacklo_s8_s16(a);
+}
+SIMD_INLINE v128 v128_unpackhi_s8_s16(v128 a) {
+  return c_v128_unpackhi_s8_s16(a);
+}
+SIMD_INLINE v128 v128_pack_s32_s16(v128 a, v128 b) {
+  return c_v128_pack_s32_s16(a, b);
+}
+SIMD_INLINE v128 v128_pack_s32_u16(v128 a, v128 b) {
+  return c_v128_pack_s32_u16(a, b);
+}
+SIMD_INLINE v128 v128_pack_s16_u8(v128 a, v128 b) {
+  return c_v128_pack_s16_u8(a, b);
+}
+SIMD_INLINE v128 v128_pack_s16_s8(v128 a, v128 b) {
+  return c_v128_pack_s16_s8(a, b);
+}
+SIMD_INLINE v128 v128_unpack_u16_s32(v64 a) { return c_v128_unpack_u16_s32(a); }
+SIMD_INLINE v128 v128_unpack_s16_s32(v64 a) { return c_v128_unpack_s16_s32(a); }
+SIMD_INLINE v128 v128_unpacklo_u16_s32(v128 a) {
+  return c_v128_unpacklo_u16_s32(a);
+}
+SIMD_INLINE v128 v128_unpacklo_s16_s32(v128 a) {
+  return c_v128_unpacklo_s16_s32(a);
+}
+SIMD_INLINE v128 v128_unpackhi_u16_s32(v128 a) {
+  return c_v128_unpackhi_u16_s32(a);
+}
+SIMD_INLINE v128 v128_unpackhi_s16_s32(v128 a) {
+  return c_v128_unpackhi_s16_s32(a);
+}
+SIMD_INLINE v128 v128_shuffle_8(v128 a, v128 pattern) {
+  return c_v128_shuffle_8(a, pattern);
+}
+
+SIMD_INLINE v128 v128_cmpgt_s8(v128 a, v128 b) { return c_v128_cmpgt_s8(a, b); }
+SIMD_INLINE v128 v128_cmplt_s8(v128 a, v128 b) { return c_v128_cmplt_s8(a, b); }
+SIMD_INLINE v128 v128_cmpeq_8(v128 a, v128 b) { return c_v128_cmpeq_8(a, b); }
+SIMD_INLINE v128 v128_cmpgt_s16(v128 a, v128 b) {
+  return c_v128_cmpgt_s16(a, b);
+}
+SIMD_INLINE v128 v128_cmplt_s16(v128 a, v128 b) {
+  return c_v128_cmplt_s16(a, b);
+}
+SIMD_INLINE v128 v128_cmpeq_16(v128 a, v128 b) { return c_v128_cmpeq_16(a, b); }
+
+SIMD_INLINE v128 v128_cmpgt_s32(v128 a, v128 b) {
+  return c_v128_cmpgt_s32(a, b);
+}
+SIMD_INLINE v128 v128_cmplt_s32(v128 a, v128 b) {
+  return c_v128_cmplt_s32(a, b);
+}
+SIMD_INLINE v128 v128_cmpeq_32(v128 a, v128 b) { return c_v128_cmpeq_32(a, b); }
+
+SIMD_INLINE v128 v128_shl_8(v128 a, unsigned int c) {
+  return c_v128_shl_8(a, c);
+}
+SIMD_INLINE v128 v128_shr_u8(v128 a, unsigned int c) {
+  return c_v128_shr_u8(a, c);
+}
+SIMD_INLINE v128 v128_shr_s8(v128 a, unsigned int c) {
+  return c_v128_shr_s8(a, c);
+}
+SIMD_INLINE v128 v128_shl_16(v128 a, unsigned int c) {
+  return c_v128_shl_16(a, c);
+}
+SIMD_INLINE v128 v128_shr_u16(v128 a, unsigned int c) {
+  return c_v128_shr_u16(a, c);
+}
+SIMD_INLINE v128 v128_shr_s16(v128 a, unsigned int c) {
+  return c_v128_shr_s16(a, c);
+}
+SIMD_INLINE v128 v128_shl_32(v128 a, unsigned int c) {
+  return c_v128_shl_32(a, c);
+}
+SIMD_INLINE v128 v128_shr_u32(v128 a, unsigned int c) {
+  return c_v128_shr_u32(a, c);
+}
+SIMD_INLINE v128 v128_shr_s32(v128 a, unsigned int c) {
+  return c_v128_shr_s32(a, c);
+}
+SIMD_INLINE v128 v128_shl_64(v128 a, unsigned int c) {
+  return c_v128_shl_64(a, c);
+}
+SIMD_INLINE v128 v128_shr_u64(v128 a, unsigned int c) {
+  return c_v128_shr_u64(a, c);
+}
+SIMD_INLINE v128 v128_shr_s64(v128 a, unsigned int c) {
+  return c_v128_shr_s64(a, c);
+}
+
+SIMD_INLINE v128 v128_shr_n_byte(v128 a, unsigned int n) {
+  return c_v128_shr_n_byte(a, n);
+}
+SIMD_INLINE v128 v128_shl_n_byte(v128 a, unsigned int n) {
+  return c_v128_shl_n_byte(a, n);
+}
+SIMD_INLINE v128 v128_shl_n_8(v128 a, unsigned int n) {
+  return c_v128_shl_n_8(a, n);
+}
+SIMD_INLINE v128 v128_shl_n_16(v128 a, unsigned int n) {
+  return c_v128_shl_n_16(a, n);
+}
+SIMD_INLINE v128 v128_shl_n_32(v128 a, unsigned int n) {
+  return c_v128_shl_n_32(a, n);
+}
+SIMD_INLINE v128 v128_shl_n_64(v128 a, unsigned int n) {
+  return c_v128_shl_n_64(a, n);
+}
+SIMD_INLINE v128 v128_shr_n_u8(v128 a, unsigned int n) {
+  return c_v128_shr_n_u8(a, n);
+}
+SIMD_INLINE v128 v128_shr_n_u16(v128 a, unsigned int n) {
+  return c_v128_shr_n_u16(a, n);
+}
+SIMD_INLINE v128 v128_shr_n_u32(v128 a, unsigned int n) {
+  return c_v128_shr_n_u32(a, n);
+}
+SIMD_INLINE v128 v128_shr_n_u64(v128 a, unsigned int n) {
+  return c_v128_shr_n_u64(a, n);
+}
+SIMD_INLINE v128 v128_shr_n_s8(v128 a, unsigned int n) {
+  return c_v128_shr_n_s8(a, n);
+}
+SIMD_INLINE v128 v128_shr_n_s16(v128 a, unsigned int n) {
+  return c_v128_shr_n_s16(a, n);
+}
+SIMD_INLINE v128 v128_shr_n_s32(v128 a, unsigned int n) {
+  return c_v128_shr_n_s32(a, n);
+}
+SIMD_INLINE v128 v128_shr_n_s64(v128 a, unsigned int n) {
+  return c_v128_shr_n_s64(a, n);
+}
+
+typedef uint32_t sad128_internal_u16;
+SIMD_INLINE sad128_internal_u16 v128_sad_u16_init() {
+  return c_v128_sad_u16_init();
+}
+SIMD_INLINE sad128_internal_u16 v128_sad_u16(sad128_internal_u16 s, v128 a,
+                                             v128 b) {
+  return c_v128_sad_u16(s, a, b);
+}
+SIMD_INLINE uint32_t v128_sad_u16_sum(sad128_internal_u16 s) {
+  return c_v128_sad_u16_sum(s);
+}
+
+typedef uint64_t ssd128_internal_s16;
+SIMD_INLINE ssd128_internal_s16 v128_ssd_s16_init() {
+  return c_v128_ssd_s16_init();
+}
+SIMD_INLINE ssd128_internal_s16 v128_ssd_s16(ssd128_internal_s16 s, v128 a,
+                                             v128 b) {
+  return c_v128_ssd_s16(s, a, b);
+}
+SIMD_INLINE uint64_t v128_ssd_s16_sum(ssd128_internal_s16 s) {
+  return c_v128_ssd_s16_sum(s);
+}
+
+#endif  // AOM_AOM_DSP_SIMD_V128_INTRINSICS_H_
diff --git a/third_party/aom/aom_dsp/simd/v128_intrinsics_arm.h b/third_party/aom/aom_dsp/simd/v128_intrinsics_arm.h
new file mode 100644
index 0000000000..3c669d5792
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v128_intrinsics_arm.h
@@ -0,0 +1,958 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V128_INTRINSICS_ARM_H_
+#define AOM_AOM_DSP_SIMD_V128_INTRINSICS_ARM_H_
+
+#include <arm_neon.h>
+
+#include "aom_dsp/simd/v64_intrinsics_arm.h"
+
+typedef int64x2_t v128;
+
+SIMD_INLINE uint32_t v128_low_u32(v128 a) {
+  return v64_low_u32(vget_low_s64(a));
+}
+
+SIMD_INLINE v64 v128_low_v64(v128 a) { return vget_low_s64(a); }
+
+SIMD_INLINE v64 v128_high_v64(v128 a) { return vget_high_s64(a); }
+
+SIMD_INLINE v128 v128_from_v64(v64 a, v64 b) { return vcombine_s64(b, a); }
+
+SIMD_INLINE v128 v128_from_64(uint64_t a, uint64_t b) {
+  return vcombine_s64((int64x1_t)b, (int64x1_t)a);
+}
+
+SIMD_INLINE v128 v128_from_32(uint32_t a, uint32_t b, uint32_t c, uint32_t d) {
+  return vcombine_s64(v64_from_32(c, d), v64_from_32(a, b));
+}
+
+SIMD_INLINE v128 v128_load_aligned(const void *p) {
+  return vreinterpretq_s64_u8(vld1q_u8((const uint8_t *)p));
+}
+
+SIMD_INLINE v128 v128_load_unaligned(const void *p) {
+  return v128_load_aligned(p);
+}
+
+SIMD_INLINE void v128_store_aligned(void *p, v128 r) {
+  vst1q_u8((uint8_t *)p, vreinterpretq_u8_s64(r));
+}
+
+SIMD_INLINE void v128_store_unaligned(void *p, v128 r) {
+  vst1q_u8((uint8_t *)p, vreinterpretq_u8_s64(r));
+}
+
+SIMD_INLINE v128 v128_align(v128 a, v128 b, unsigned int c) {
+// The following functions require an immediate.
+// Some compilers will check this during optimisation, others wont.
+#if defined(__OPTIMIZE__) && __OPTIMIZE__ && !defined(__clang__)
+  return c ? vreinterpretq_s64_s8(
+                 vextq_s8(vreinterpretq_s8_s64(b), vreinterpretq_s8_s64(a), c))
+           : b;
+#else
+  return c < 8 ? v128_from_v64(v64_align(v128_low_v64(a), v128_high_v64(b), c),
+                               v64_align(v128_high_v64(b), v128_low_v64(b), c))
+               : v128_from_v64(
+                     v64_align(v128_high_v64(a), v128_low_v64(a), c - 8),
+                     v64_align(v128_low_v64(a), v128_high_v64(b), c - 8));
+#endif
+}
+
+SIMD_INLINE v128 v128_zero() { return vreinterpretq_s64_u8(vdupq_n_u8(0)); }
+
+SIMD_INLINE v128 v128_ones() { return vreinterpretq_s64_u8(vdupq_n_u8(-1)); }
+
+SIMD_INLINE v128 v128_dup_8(uint8_t x) {
+  return vreinterpretq_s64_u8(vdupq_n_u8(x));
+}
+
+SIMD_INLINE v128 v128_dup_16(uint16_t x) {
+  return vreinterpretq_s64_u16(vdupq_n_u16(x));
+}
+
+SIMD_INLINE v128 v128_dup_32(uint32_t x) {
+  return vreinterpretq_s64_u32(vdupq_n_u32(x));
+}
+
+SIMD_INLINE v128 v128_dup_64(uint64_t x) {
+  return vreinterpretq_s64_u64(vdupq_n_u64(x));
+}
+
+SIMD_INLINE int64_t v128_dotp_su8(v128 a, v128 b) {
+  int16x8_t t1 = vmulq_s16(
+      vmovl_s8(vreinterpret_s8_s64(vget_low_s64(a))),
+      vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_s64(vget_low_s64(b)))));
+  int16x8_t t2 = vmulq_s16(
+      vmovl_s8(vreinterpret_s8_s64(vget_high_s64(a))),
+      vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_s64(vget_high_s64(b)))));
+#if defined(__aarch64__)
+  return vaddlvq_s16(t1) + vaddlvq_s16(t2);
+#else
+  int64x2_t t = vpaddlq_s32(vaddq_s32(vpaddlq_s16(t1), vpaddlq_s16(t2)));
+  return (int64_t)vget_high_s64(t) + (int64_t)vget_low_s64(t);
+#endif
+}
+
+SIMD_INLINE int64_t v128_dotp_s16(v128 a, v128 b) {
+  return v64_dotp_s16(vget_high_s64(a), vget_high_s64(b)) +
+         v64_dotp_s16(vget_low_s64(a), vget_low_s64(b));
+}
+
+SIMD_INLINE int64_t v128_dotp_s32(v128 a, v128 b) {
+  int64x2_t t = vpaddlq_s32(
+      vmulq_s32(vreinterpretq_s32_s64(a), vreinterpretq_s32_s64(b)));
+  return (int64_t)vget_high_s64(t) + (int64_t)vget_low_s64(t);
+}
+
+SIMD_INLINE uint64_t v128_hadd_u8(v128 x) {
+#if defined(__aarch64__)
+  return vaddlvq_u8(vreinterpretq_u8_s64(x));
+#else
+  uint64x2_t t = vpaddlq_u32(vpaddlq_u16(vpaddlq_u8(vreinterpretq_u8_s64(x))));
+  return vget_lane_s32(
+      vreinterpret_s32_u64(vadd_u64(vget_high_u64(t), vget_low_u64(t))), 0);
+#endif
+}
+
+SIMD_INLINE v128 v128_padd_s16(v128 a) {
+  return vreinterpretq_s64_s32(vpaddlq_s16(vreinterpretq_s16_s64(a)));
+}
+
+SIMD_INLINE v128 v128_padd_u8(v128 a) {
+  return vreinterpretq_s64_u16(vpaddlq_u8(vreinterpretq_u8_s64(a)));
+}
+
+typedef struct {
+  sad64_internal hi, lo;
+} sad128_internal;
+
+SIMD_INLINE sad128_internal v128_sad_u8_init() {
+  sad128_internal s;
+  s.hi = s.lo = vdupq_n_u16(0);
+  return s;
+}
+
+/* Implementation dependent return value.  Result must be finalised with
+   v128_sad_u8_sum().
+   The result for more than 32 v128_sad_u8() calls is undefined. */
+SIMD_INLINE sad128_internal v128_sad_u8(sad128_internal s, v128 a, v128 b) {
+  sad128_internal r;
+  r.hi = v64_sad_u8(s.hi, vget_high_s64(a), vget_high_s64(b));
+  r.lo = v64_sad_u8(s.lo, vget_low_s64(a), vget_low_s64(b));
+  return r;
+}
+
+SIMD_INLINE uint32_t v128_sad_u8_sum(sad128_internal s) {
+#if defined(__aarch64__)
+  return vaddlvq_u16(s.hi) + vaddlvq_u16(s.lo);
+#else
+  uint64x2_t t = vpaddlq_u32(vpaddlq_u16(vaddq_u16(s.hi, s.lo)));
+  return (uint32_t)(uint64_t)(vget_high_u64(t) + vget_low_u64(t));
+#endif
+}
+
+typedef struct {
+  ssd64_internal hi, lo;
+} ssd128_internal;
+
+SIMD_INLINE ssd128_internal v128_ssd_u8_init() {
+  ssd128_internal s;
+  s.hi = s.lo = v64_ssd_u8_init();
+  return s;
+}
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v128_ssd_u8_sum(). */
+SIMD_INLINE ssd128_internal v128_ssd_u8(ssd128_internal s, v128 a, v128 b) {
+  ssd128_internal r;
+  r.hi = v64_ssd_u8(s.hi, vget_high_s64(a), vget_high_s64(b));
+  r.lo = v64_ssd_u8(s.lo, vget_low_s64(a), vget_low_s64(b));
+  return r;
+}
+
+SIMD_INLINE uint32_t v128_ssd_u8_sum(ssd128_internal s) {
+  return (uint32_t)(v64_ssd_u8_sum(s.hi) + v64_ssd_u8_sum(s.lo));
+}
+
+SIMD_INLINE v128 v128_or(v128 x, v128 y) { return vorrq_s64(x, y); }
+
+SIMD_INLINE v128 v128_xor(v128 x, v128 y) { return veorq_s64(x, y); }
+
+SIMD_INLINE v128 v128_and(v128 x, v128 y) { return vandq_s64(x, y); }
+
+SIMD_INLINE v128 v128_andn(v128 x, v128 y) { return vbicq_s64(x, y); }
+
+SIMD_INLINE v128 v128_add_8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vaddq_u8(vreinterpretq_u8_s64(x), vreinterpretq_u8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_sadd_u8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vqaddq_u8(vreinterpretq_u8_s64(x), vreinterpretq_u8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_sadd_s8(v128 x, v128 y) {
+  return vreinterpretq_s64_s8(
+      vqaddq_s8(vreinterpretq_s8_s64(x), vreinterpretq_s8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_add_16(v128 x, v128 y) {
+  return vreinterpretq_s64_s16(
+      vaddq_s16(vreinterpretq_s16_s64(x), vreinterpretq_s16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_sadd_s16(v128 x, v128 y) {
+  return vreinterpretq_s64_s16(
+      vqaddq_s16(vreinterpretq_s16_s64(x), vreinterpretq_s16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_add_32(v128 x, v128 y) {
+  return vreinterpretq_s64_u32(
+      vaddq_u32(vreinterpretq_u32_s64(x), vreinterpretq_u32_s64(y)));
+}
+
+SIMD_INLINE v128 v128_add_64(v128 x, v128 y) {
+  return vreinterpretq_s64_u64(
+      vaddq_u64(vreinterpretq_u64_s64(x), vreinterpretq_u64_s64(y)));
+}
+
+SIMD_INLINE v128 v128_sub_8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vsubq_u8(vreinterpretq_u8_s64(x), vreinterpretq_u8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_sub_16(v128 x, v128 y) {
+  return vreinterpretq_s64_s16(
+      vsubq_s16(vreinterpretq_s16_s64(x), vreinterpretq_s16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_ssub_s16(v128 x, v128 y) {
+  return vreinterpretq_s64_s16(
+      vqsubq_s16(vreinterpretq_s16_s64(x), vreinterpretq_s16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_ssub_u16(v128 x, v128 y) {
+  return vreinterpretq_s64_u16(
+      vqsubq_u16(vreinterpretq_u16_s64(x), vreinterpretq_u16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_ssub_u8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vqsubq_u8(vreinterpretq_u8_s64(x), vreinterpretq_u8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_ssub_s8(v128 x, v128 y) {
+  return vreinterpretq_s64_s8(
+      vqsubq_s8(vreinterpretq_s8_s64(x), vreinterpretq_s8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_sub_32(v128 x, v128 y) {
+  return vreinterpretq_s64_s32(
+      vsubq_s32(vreinterpretq_s32_s64(x), vreinterpretq_s32_s64(y)));
+}
+
+SIMD_INLINE v128 v128_sub_64(v128 x, v128 y) { return vsubq_s64(x, y); }
+
+SIMD_INLINE v128 v128_abs_s16(v128 x) {
+  return vreinterpretq_s64_s16(vabsq_s16(vreinterpretq_s16_s64(x)));
+}
+
+SIMD_INLINE v128 v128_abs_s8(v128 x) {
+  return vreinterpretq_s64_s8(vabsq_s8(vreinterpretq_s8_s64(x)));
+}
+
+SIMD_INLINE v128 v128_mul_s16(v64 a, v64 b) {
+  return vreinterpretq_s64_s32(
+      vmull_s16(vreinterpret_s16_s64(a), vreinterpret_s16_s64(b)));
+}
+
+SIMD_INLINE v128 v128_mullo_s16(v128 a, v128 b) {
+  return vreinterpretq_s64_s16(
+      vmulq_s16(vreinterpretq_s16_s64(a), vreinterpretq_s16_s64(b)));
+}
+
+SIMD_INLINE v128 v128_mulhi_s16(v128 a, v128 b) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_s16(vuzp2q_s16(
+      vreinterpretq_s16_s32(vmull_s16(vreinterpret_s16_s64(vget_low_s64(a)),
+                                      vreinterpret_s16_s64(vget_low_s64(b)))),
+      vreinterpretq_s16_s32(
+          vmull_high_s16(vreinterpretq_s16_s64(a), vreinterpretq_s16_s64(b)))));
+#else
+  return v128_from_v64(v64_mulhi_s16(vget_high_s64(a), vget_high_s64(b)),
+                       v64_mulhi_s16(vget_low_s64(a), vget_low_s64(b)));
+#endif
+}
+
+SIMD_INLINE v128 v128_mullo_s32(v128 a, v128 b) {
+  return vreinterpretq_s64_s32(
+      vmulq_s32(vreinterpretq_s32_s64(a), vreinterpretq_s32_s64(b)));
+}
+
+SIMD_INLINE v128 v128_madd_s16(v128 a, v128 b) {
+#if defined(__aarch64__)
+  int32x4_t t1 = vmull_s16(vreinterpret_s16_s64(vget_low_s64(a)),
+                           vreinterpret_s16_s64(vget_low_s64(b)));
+  int32x4_t t2 =
+      vmull_high_s16(vreinterpretq_s16_s64(a), vreinterpretq_s16_s64(b));
+  return vreinterpretq_s64_s32(vpaddq_s32(t1, t2));
+#else
+  return v128_from_v64(v64_madd_s16(vget_high_s64(a), vget_high_s64(b)),
+                       v64_madd_s16(vget_low_s64(a), vget_low_s64(b)));
+#endif
+}
+
+SIMD_INLINE v128 v128_madd_us8(v128 a, v128 b) {
+#if defined(__aarch64__)
+  int16x8_t t1 = vmulq_s16(
+      vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_s64(vget_low_s64(a)))),
+      vmovl_s8(vreinterpret_s8_s64(vget_low_s64(b))));
+  int16x8_t t2 = vmulq_s16(
+      vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_s64(vget_high_s64(a)))),
+      vmovl_s8(vreinterpret_s8_s64(vget_high_s64(b))));
+  return vreinterpretq_s64_s16(
+      vqaddq_s16(vuzp1q_s16(t1, t2), vuzp2q_s16(t1, t2)));
+#else
+  return v128_from_v64(v64_madd_us8(vget_high_s64(a), vget_high_s64(b)),
+                       v64_madd_us8(vget_low_s64(a), vget_low_s64(b)));
+#endif
+}
+
+SIMD_INLINE v128 v128_avg_u8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vrhaddq_u8(vreinterpretq_u8_s64(x), vreinterpretq_u8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_rdavg_u8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vhaddq_u8(vreinterpretq_u8_s64(x), vreinterpretq_u8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_rdavg_u16(v128 x, v128 y) {
+  return vreinterpretq_s64_u16(
+      vhaddq_u16(vreinterpretq_u16_s64(x), vreinterpretq_u16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_avg_u16(v128 x, v128 y) {
+  return vreinterpretq_s64_u16(
+      vrhaddq_u16(vreinterpretq_u16_s64(x), vreinterpretq_u16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_min_u8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vminq_u8(vreinterpretq_u8_s64(x), vreinterpretq_u8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_max_u8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vmaxq_u8(vreinterpretq_u8_s64(x), vreinterpretq_u8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_min_s8(v128 x, v128 y) {
+  return vreinterpretq_s64_s8(
+      vminq_s8(vreinterpretq_s8_s64(x), vreinterpretq_s8_s64(y)));
+}
+
+SIMD_INLINE uint32_t v128_movemask_8(v128 a) {
+  a = vreinterpretq_s64_u8(vcltq_s8(vreinterpretq_s8_s64(a), vdupq_n_s8(0)));
+#if defined(__aarch64__)
+  uint8x16_t m =
+      vandq_u8(vreinterpretq_u8_s64(a),
+               vreinterpretq_u8_u64(vdupq_n_u64(0x8040201008040201ULL)));
+  return vaddv_u8(vget_low_u8(m)) + (vaddv_u8(vget_high_u8(m)) << 8);
+#else
+  uint64x2_t m = vpaddlq_u32(vpaddlq_u16(vpaddlq_u8(
+      vandq_u8(vreinterpretq_u8_s64(a),
+               vreinterpretq_u8_u64(vdupq_n_u64(0x8040201008040201ULL))))));
+  return v64_low_u32(
+      v64_ziplo_8(v128_high_v64((v128)m), v128_low_v64((v128)m)));
+#endif
+}
+
+SIMD_INLINE v128 v128_blend_8(v128 a, v128 b, v128 c) {
+  c = vreinterpretq_s64_u8(vcltq_s8(vreinterpretq_s8_s64(c), vdupq_n_s8(0)));
+  return v128_or(v128_and(b, c), v128_andn(a, c));
+}
+
+SIMD_INLINE v128 v128_max_s8(v128 x, v128 y) {
+  return vreinterpretq_s64_s8(
+      vmaxq_s8(vreinterpretq_s8_s64(x), vreinterpretq_s8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_min_s16(v128 x, v128 y) {
+  return vreinterpretq_s64_s16(
+      vminq_s16(vreinterpretq_s16_s64(x), vreinterpretq_s16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_max_s16(v128 x, v128 y) {
+  return vreinterpretq_s64_s16(
+      vmaxq_s16(vreinterpretq_s16_s64(x), vreinterpretq_s16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_min_s32(v128 x, v128 y) {
+  return vreinterpretq_s64_s32(
+      vminq_s32(vreinterpretq_s32_s64(x), vreinterpretq_s32_s64(y)));
+}
+
+SIMD_INLINE v128 v128_max_s32(v128 x, v128 y) {
+  return vreinterpretq_s64_s32(
+      vmaxq_s32(vreinterpretq_s32_s64(x), vreinterpretq_s32_s64(y)));
+}
+
+SIMD_INLINE v128 v128_ziplo_8(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u8(
+      vzip1q_u8(vreinterpretq_u8_s64(y), vreinterpretq_u8_s64(x)));
+#else
+  uint8x16x2_t r = vzipq_u8(vreinterpretq_u8_s64(y), vreinterpretq_u8_s64(x));
+  return vreinterpretq_s64_u8(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v128 v128_ziphi_8(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u8(
+      vzip2q_u8(vreinterpretq_u8_s64(y), vreinterpretq_u8_s64(x)));
+#else
+  uint8x16x2_t r = vzipq_u8(vreinterpretq_u8_s64(y), vreinterpretq_u8_s64(x));
+  return vreinterpretq_s64_u8(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v128 v128_zip_8(v64 x, v64 y) {
+  uint8x8x2_t r = vzip_u8(vreinterpret_u8_s64(y), vreinterpret_u8_s64(x));
+  return vreinterpretq_s64_u8(vcombine_u8(r.val[0], r.val[1]));
+}
+
+SIMD_INLINE v128 v128_ziplo_16(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u16(
+      vzip1q_u16(vreinterpretq_u16_s64(y), vreinterpretq_u16_s64(x)));
+#else
+  int16x8x2_t r = vzipq_s16(vreinterpretq_s16_s64(y), vreinterpretq_s16_s64(x));
+  return vreinterpretq_s64_s16(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v128 v128_ziphi_16(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u16(
+      vzip2q_u16(vreinterpretq_u16_s64(y), vreinterpretq_u16_s64(x)));
+#else
+  int16x8x2_t r = vzipq_s16(vreinterpretq_s16_s64(y), vreinterpretq_s16_s64(x));
+  return vreinterpretq_s64_s16(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v128 v128_zip_16(v64 x, v64 y) {
+  uint16x4x2_t r = vzip_u16(vreinterpret_u16_s64(y), vreinterpret_u16_s64(x));
+  return vreinterpretq_s64_u16(vcombine_u16(r.val[0], r.val[1]));
+}
+
+SIMD_INLINE v128 v128_ziplo_32(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u32(
+      vzip1q_u32(vreinterpretq_u32_s64(y), vreinterpretq_u32_s64(x)));
+#else
+  int32x4x2_t r = vzipq_s32(vreinterpretq_s32_s64(y), vreinterpretq_s32_s64(x));
+  return vreinterpretq_s64_s32(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v128 v128_ziphi_32(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u32(
+      vzip2q_u32(vreinterpretq_u32_s64(y), vreinterpretq_u32_s64(x)));
+#else
+  int32x4x2_t r = vzipq_s32(vreinterpretq_s32_s64(y), vreinterpretq_s32_s64(x));
+  return vreinterpretq_s64_s32(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v128 v128_zip_32(v64 x, v64 y) {
+  uint32x2x2_t r = vzip_u32(vreinterpret_u32_s64(y), vreinterpret_u32_s64(x));
+  return vreinterpretq_s64_u32(vcombine_u32(r.val[0], r.val[1]));
+}
+
+SIMD_INLINE v128 v128_ziplo_64(v128 a, v128 b) {
+  return v128_from_v64(vget_low_s64((int64x2_t)a), vget_low_s64((int64x2_t)b));
+}
+
+SIMD_INLINE v128 v128_ziphi_64(v128 a, v128 b) {
+  return v128_from_v64(vget_high_s64((int64x2_t)a),
+                       vget_high_s64((int64x2_t)b));
+}
+
+SIMD_INLINE v128 v128_unziplo_8(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u8(
+      vuzp1q_u8(vreinterpretq_u8_s64(y), vreinterpretq_u8_s64(x)));
+#else
+  uint8x16x2_t r = vuzpq_u8(vreinterpretq_u8_s64(y), vreinterpretq_u8_s64(x));
+  return vreinterpretq_s64_u8(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v128 v128_unziphi_8(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u8(
+      vuzp2q_u8(vreinterpretq_u8_s64(y), vreinterpretq_u8_s64(x)));
+#else
+  uint8x16x2_t r = vuzpq_u8(vreinterpretq_u8_s64(y), vreinterpretq_u8_s64(x));
+  return vreinterpretq_s64_u8(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v128 v128_unziplo_16(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u16(
+      vuzp1q_u16(vreinterpretq_u16_s64(y), vreinterpretq_u16_s64(x)));
+#else
+  uint16x8x2_t r =
+      vuzpq_u16(vreinterpretq_u16_s64(y), vreinterpretq_u16_s64(x));
+  return vreinterpretq_s64_u16(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v128 v128_unziphi_16(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u16(
+      vuzp2q_u16(vreinterpretq_u16_s64(y), vreinterpretq_u16_s64(x)));
+#else
+  uint16x8x2_t r =
+      vuzpq_u16(vreinterpretq_u16_s64(y), vreinterpretq_u16_s64(x));
+  return vreinterpretq_s64_u16(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v128 v128_unziplo_32(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u32(
+      vuzp1q_u32(vreinterpretq_u32_s64(y), vreinterpretq_u32_s64(x)));
+#else
+  uint32x4x2_t r =
+      vuzpq_u32(vreinterpretq_u32_s64(y), vreinterpretq_u32_s64(x));
+  return vreinterpretq_s64_u32(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v128 v128_unziphi_32(v128 x, v128 y) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u32(
+      vuzp2q_u32(vreinterpretq_u32_s64(y), vreinterpretq_u32_s64(x)));
+#else
+  uint32x4x2_t r =
+      vuzpq_u32(vreinterpretq_u32_s64(y), vreinterpretq_u32_s64(x));
+  return vreinterpretq_s64_u32(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v128 v128_unpack_u8_s16(v64 a) {
+  return vreinterpretq_s64_u16(vmovl_u8(vreinterpret_u8_s64(a)));
+}
+
+SIMD_INLINE v128 v128_unpacklo_u8_s16(v128 a) {
+  return vreinterpretq_s64_u16(vmovl_u8(vreinterpret_u8_s64(vget_low_s64(a))));
+}
+
+SIMD_INLINE v128 v128_unpackhi_u8_s16(v128 a) {
+  return vreinterpretq_s64_u16(vmovl_u8(vreinterpret_u8_s64(vget_high_s64(a))));
+}
+
+SIMD_INLINE v128 v128_unpack_s8_s16(v64 a) {
+  return vreinterpretq_s64_s16(vmovl_s8(vreinterpret_s8_s64(a)));
+}
+
+SIMD_INLINE v128 v128_unpacklo_s8_s16(v128 a) {
+  return vreinterpretq_s64_s16(vmovl_s8(vreinterpret_s8_s64(vget_low_s64(a))));
+}
+
+SIMD_INLINE v128 v128_unpackhi_s8_s16(v128 a) {
+  return vreinterpretq_s64_s16(vmovl_s8(vreinterpret_s8_s64(vget_high_s64(a))));
+}
+
+SIMD_INLINE v128 v128_pack_s32_s16(v128 a, v128 b) {
+  return v128_from_v64(
+      vreinterpret_s64_s16(vqmovn_s32(vreinterpretq_s32_s64(a))),
+      vreinterpret_s64_s16(vqmovn_s32(vreinterpretq_s32_s64(b))));
+}
+
+SIMD_INLINE v128 v128_pack_s32_u16(v128 a, v128 b) {
+  return v128_from_v64(
+      vreinterpret_s64_u16(vqmovun_s32(vreinterpretq_s32_s64(a))),
+      vreinterpret_s64_u16(vqmovun_s32(vreinterpretq_s32_s64(b))));
+}
+
+SIMD_INLINE v128 v128_pack_s16_u8(v128 a, v128 b) {
+  return v128_from_v64(
+      vreinterpret_s64_u8(vqmovun_s16(vreinterpretq_s16_s64(a))),
+      vreinterpret_s64_u8(vqmovun_s16(vreinterpretq_s16_s64(b))));
+}
+
+SIMD_INLINE v128 v128_pack_s16_s8(v128 a, v128 b) {
+  return v128_from_v64(
+      vreinterpret_s64_s8(vqmovn_s16(vreinterpretq_s16_s64(a))),
+      vreinterpret_s64_s8(vqmovn_s16(vreinterpretq_s16_s64(b))));
+}
+
+SIMD_INLINE v128 v128_unpack_u16_s32(v64 a) {
+  return vreinterpretq_s64_u32(vmovl_u16(vreinterpret_u16_s64(a)));
+}
+
+SIMD_INLINE v128 v128_unpack_s16_s32(v64 a) {
+  return vreinterpretq_s64_s32(vmovl_s16(vreinterpret_s16_s64(a)));
+}
+
+SIMD_INLINE v128 v128_unpacklo_u16_s32(v128 a) {
+  return vreinterpretq_s64_u32(
+      vmovl_u16(vreinterpret_u16_s64(vget_low_s64(a))));
+}
+
+SIMD_INLINE v128 v128_unpacklo_s16_s32(v128 a) {
+  return vreinterpretq_s64_s32(
+      vmovl_s16(vreinterpret_s16_s64(vget_low_s64(a))));
+}
+
+SIMD_INLINE v128 v128_unpackhi_u16_s32(v128 a) {
+  return vreinterpretq_s64_u32(
+      vmovl_u16(vreinterpret_u16_s64(vget_high_s64(a))));
+}
+
+SIMD_INLINE v128 v128_unpackhi_s16_s32(v128 a) {
+  return vreinterpretq_s64_s32(
+      vmovl_s16(vreinterpret_s16_s64(vget_high_s64(a))));
+}
+
+SIMD_INLINE v128 v128_shuffle_8(v128 x, v128 pattern) {
+#if defined(__aarch64__)
+  return vreinterpretq_s64_u8(
+      vqtbl1q_u8(vreinterpretq_u8_s64(x), vreinterpretq_u8_s64(pattern)));
+#else
+  uint8x8x2_t p = { { vget_low_u8(vreinterpretq_u8_s64(x)),
+                      vget_high_u8(vreinterpretq_u8_s64(x)) } };
+  return v128_from_64((uint64_t)vreinterpret_s64_u8(vtbl2_u8(
+                          p, vreinterpret_u8_s64(vget_high_s64(pattern)))),
+                      (uint64_t)vreinterpret_s64_u8(vtbl2_u8(
+                          p, vreinterpret_u8_s64(vget_low_s64(pattern)))));
+#endif
+}
+
+SIMD_INLINE v128 v128_cmpgt_s8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vcgtq_s8(vreinterpretq_s8_s64(x), vreinterpretq_s8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_cmplt_s8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vcltq_s8(vreinterpretq_s8_s64(x), vreinterpretq_s8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_cmpeq_8(v128 x, v128 y) {
+  return vreinterpretq_s64_u8(
+      vceqq_u8(vreinterpretq_u8_s64(x), vreinterpretq_u8_s64(y)));
+}
+
+SIMD_INLINE v128 v128_cmpgt_s16(v128 x, v128 y) {
+  return vreinterpretq_s64_u16(
+      vcgtq_s16(vreinterpretq_s16_s64(x), vreinterpretq_s16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_cmplt_s16(v128 x, v128 y) {
+  return vreinterpretq_s64_u16(
+      vcltq_s16(vreinterpretq_s16_s64(x), vreinterpretq_s16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_cmpeq_16(v128 x, v128 y) {
+  return vreinterpretq_s64_u16(
+      vceqq_s16(vreinterpretq_s16_s64(x), vreinterpretq_s16_s64(y)));
+}
+
+SIMD_INLINE v128 v128_cmpgt_s32(v128 x, v128 y) {
+  return vreinterpretq_s64_u32(
+      vcgtq_s32(vreinterpretq_s32_s64(x), vreinterpretq_s32_s64(y)));
+}
+
+SIMD_INLINE v128 v128_cmplt_s32(v128 x, v128 y) {
+  return vreinterpretq_s64_u32(
+      vcltq_s32(vreinterpretq_s32_s64(x), vreinterpretq_s32_s64(y)));
+}
+
+SIMD_INLINE v128 v128_cmpeq_32(v128 x, v128 y) {
+  return vreinterpretq_s64_u32(
+      vceqq_s32(vreinterpretq_s32_s64(x), vreinterpretq_s32_s64(y)));
+}
+
+SIMD_INLINE v128 v128_shl_8(v128 a, unsigned int c) {
+  return (c > 7) ? v128_zero()
+                 : vreinterpretq_s64_u8(
+                       vshlq_u8(vreinterpretq_u8_s64(a), vdupq_n_s8(c)));
+}
+
+SIMD_INLINE v128 v128_shr_u8(v128 a, unsigned int c) {
+  return (c > 7) ? v128_zero()
+                 : vreinterpretq_s64_u8(
+                       vshlq_u8(vreinterpretq_u8_s64(a), vdupq_n_s8(-c)));
+}
+
+SIMD_INLINE v128 v128_shr_s8(v128 a, unsigned int c) {
+  return (c > 7) ? v128_ones()
+                 : vreinterpretq_s64_s8(
+                       vshlq_s8(vreinterpretq_s8_s64(a), vdupq_n_s8(-c)));
+}
+
+SIMD_INLINE v128 v128_shl_16(v128 a, unsigned int c) {
+  return (c > 15) ? v128_zero()
+                  : vreinterpretq_s64_u16(
+                        vshlq_u16(vreinterpretq_u16_s64(a), vdupq_n_s16(c)));
+}
+
+SIMD_INLINE v128 v128_shr_u16(v128 a, unsigned int c) {
+  return (c > 15) ? v128_zero()
+                  : vreinterpretq_s64_u16(
+                        vshlq_u16(vreinterpretq_u16_s64(a), vdupq_n_s16(-c)));
+}
+
+SIMD_INLINE v128 v128_shr_s16(v128 a, unsigned int c) {
+  return (c > 15) ? v128_ones()
+                  : vreinterpretq_s64_s16(
+                        vshlq_s16(vreinterpretq_s16_s64(a), vdupq_n_s16(-c)));
+}
+
+SIMD_INLINE v128 v128_shl_32(v128 a, unsigned int c) {
+  return (c > 31) ? v128_zero()
+                  : vreinterpretq_s64_u32(
+                        vshlq_u32(vreinterpretq_u32_s64(a), vdupq_n_s32(c)));
+}
+
+SIMD_INLINE v128 v128_shr_u32(v128 a, unsigned int c) {
+  return (c > 31) ? v128_zero()
+                  : vreinterpretq_s64_u32(
+                        vshlq_u32(vreinterpretq_u32_s64(a), vdupq_n_s32(-c)));
+}
+
+SIMD_INLINE v128 v128_shr_s32(v128 a, unsigned int c) {
+  return (c > 31) ? v128_ones()
+                  : vreinterpretq_s64_s32(
+                        vshlq_s32(vreinterpretq_s32_s64(a), vdupq_n_s32(-c)));
+}
+
+SIMD_INLINE v128 v128_shl_64(v128 a, unsigned int c) {
+  return (c > 63) ? v128_zero()
+                  : vreinterpretq_s64_u64(
+                        vshlq_u64(vreinterpretq_u64_s64(a), vdupq_n_s64(c)));
+}
+
+SIMD_INLINE v128 v128_shr_u64(v128 a, unsigned int c) {
+  return (c > 63) ? v128_zero()
+                  : vreinterpretq_s64_u64(
+                        vshlq_u64(vreinterpretq_u64_s64(a), vdupq_n_s64(-c)));
+}
+
+SIMD_INLINE v128 v128_shr_s64(v128 a, unsigned int c) {
+  return (c > 63) ? v128_ones() : vshlq_s64(a, vdupq_n_s64(-c));
+}
+
+#if defined(__OPTIMIZE__) && __OPTIMIZE__ && !defined(__clang__)
+
+SIMD_INLINE v128 v128_shl_n_byte(v128 a, unsigned int n) {
+  return n < 8
+             ? v128_from_64(
+                   (uint64_t)vorr_u64(
+                       vshl_n_u64(vreinterpret_u64_s64(vget_high_s64(a)),
+                                  n * 8),
+                       vshr_n_u64(vreinterpret_u64_s64(vget_low_s64(a)),
+                                  (8 - n) * 8)),
+                   (uint64_t)vshl_n_u64(vreinterpret_u64_s64(vget_low_s64(a)),
+                                        n * 8))
+             : (n == 8 ? v128_from_64(
+                             (uint64_t)vreinterpret_u64_s64(vget_low_s64(a)), 0)
+                       : v128_from_64((uint64_t)vshl_n_u64(
+                                          vreinterpret_u64_s64(vget_low_s64(a)),
+                                          (n - 8) * 8),
+                                      0));
+}
+
+SIMD_INLINE v128 v128_shr_n_byte(v128 a, unsigned int n) {
+  return n < 8
+             ? v128_from_64(
+                   (uint64_t)vshr_n_u64(vreinterpret_u64_s64(vget_high_s64(a)),
+                                        n * 8),
+                   (uint64_t)vorr_u64(
+                       vshr_n_u64(vreinterpret_u64_s64(vget_low_s64(a)), n * 8),
+                       vshl_n_u64(vreinterpret_u64_s64(vget_high_s64(a)),
+                                  (8 - n) * 8)))
+             : (n == 8 ? v128_from_64(0, (uint64_t)vreinterpret_u64_s64(
+                                             vget_high_s64(a)))
+                       : v128_from_64(
+                             0, (uint64_t)vshr_n_u64(
+                                    vreinterpret_u64_s64(vget_high_s64(a)),
+                                    (n - 8) * 8)));
+}
+
+SIMD_INLINE v128 v128_shl_n_8(v128 a, unsigned int c) {
+  return vreinterpretq_s64_u8(vshlq_n_u8(vreinterpretq_u8_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shr_n_u8(v128 a, unsigned int c) {
+  return vreinterpretq_s64_u8(vshrq_n_u8(vreinterpretq_u8_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shr_n_s8(v128 a, unsigned int c) {
+  return vreinterpretq_s64_s8(vshrq_n_s8(vreinterpretq_s8_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shl_n_16(v128 a, unsigned int c) {
+  return vreinterpretq_s64_u16(vshlq_n_u16(vreinterpretq_u16_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shr_n_u16(v128 a, unsigned int c) {
+  return vreinterpretq_s64_u16(vshrq_n_u16(vreinterpretq_u16_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shr_n_s16(v128 a, unsigned int c) {
+  return vreinterpretq_s64_s16(vshrq_n_s16(vreinterpretq_s16_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shl_n_32(v128 a, unsigned int c) {
+  return vreinterpretq_s64_u32(vshlq_n_u32(vreinterpretq_u32_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shr_n_u32(v128 a, unsigned int c) {
+  return vreinterpretq_s64_u32(vshrq_n_u32(vreinterpretq_u32_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shr_n_s32(v128 a, unsigned int c) {
+  return vreinterpretq_s64_s32(vshrq_n_s32(vreinterpretq_s32_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shl_n_64(v128 a, unsigned int c) {
+  return vreinterpretq_s64_u64(vshlq_n_u64(vreinterpretq_u64_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shr_n_u64(v128 a, unsigned int c) {
+  return vreinterpretq_s64_u64(vshrq_n_u64(vreinterpretq_u64_s64(a), c));
+}
+
+SIMD_INLINE v128 v128_shr_n_s64(v128 a, unsigned int c) {
+  return vshrq_n_s64(a, c);
+}
+
+#else
+
+SIMD_INLINE v128 v128_shl_n_byte(v128 a, unsigned int n) {
+  if (n < 8)
+    return v128_from_v64(v64_or(v64_shl_n_byte(v128_high_v64(a), n),
+                                v64_shr_n_byte(v128_low_v64(a), 8 - n)),
+                         v64_shl_n_byte(v128_low_v64(a), n));
+  else
+    return v128_from_v64(v64_shl_n_byte(v128_low_v64(a), n - 8), v64_zero());
+}
+
+SIMD_INLINE v128 v128_shr_n_byte(v128 a, unsigned int n) {
+  if (n < 8)
+    return v128_from_v64(v64_shr_n_byte(v128_high_v64(a), n),
+                         v64_or(v64_shr_n_byte(v128_low_v64(a), n),
+                                v64_shl_n_byte(v128_high_v64(a), 8 - n)));
+  else
+    return v128_from_v64(v64_zero(), v64_shr_n_byte(v128_high_v64(a), n - 8));
+}
+
+SIMD_INLINE v128 v128_shl_n_8(v128 a, unsigned int c) {
+  return v128_shl_8(a, c);
+}
+
+SIMD_INLINE v128 v128_shr_n_u8(v128 a, unsigned int c) {
+  return v128_shr_u8(a, c);
+}
+
+SIMD_INLINE v128 v128_shr_n_s8(v128 a, unsigned int c) {
+  return v128_shr_s8(a, c);
+}
+
+SIMD_INLINE v128 v128_shl_n_16(v128 a, unsigned int c) {
+  return v128_shl_16(a, c);
+}
+
+SIMD_INLINE v128 v128_shr_n_u16(v128 a, unsigned int c) {
+  return v128_shr_u16(a, c);
+}
+
+SIMD_INLINE v128 v128_shr_n_s16(v128 a, unsigned int c) {
+  return v128_shr_s16(a, c);
+}
+
+SIMD_INLINE v128 v128_shl_n_32(v128 a, unsigned int c) {
+  return v128_shl_32(a, c);
+}
+
+SIMD_INLINE v128 v128_shr_n_u32(v128 a, unsigned int c) {
+  return v128_shr_u32(a, c);
+}
+
+SIMD_INLINE v128 v128_shr_n_s32(v128 a, unsigned int c) {
+  return v128_shr_s32(a, c);
+}
+
+SIMD_INLINE v128 v128_shl_n_64(v128 a, unsigned int c) {
+  return v128_shl_64(a, c);
+}
+
+SIMD_INLINE v128 v128_shr_n_u64(v128 a, unsigned int c) {
+  return v128_shr_u64(a, c);
+}
+
+SIMD_INLINE v128 v128_shr_n_s64(v128 a, unsigned int c) {
+  return v128_shr_s64(a, c);
+}
+
+#endif
+
+typedef uint32x4_t sad128_internal_u16;
+
+SIMD_INLINE sad128_internal_u16 v128_sad_u16_init() { return vdupq_n_u32(0); }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v128_sad_u16_sum(). */
+SIMD_INLINE sad128_internal_u16 v128_sad_u16(sad128_internal_u16 s, v128 a,
+                                             v128 b) {
+  return vaddq_u32(
+      s, vpaddlq_u16(vsubq_u16(
+             vmaxq_u16(vreinterpretq_u16_s64(a), vreinterpretq_u16_s64(b)),
+             vminq_u16(vreinterpretq_u16_s64(a), vreinterpretq_u16_s64(b)))));
+}
+
+SIMD_INLINE uint32_t v128_sad_u16_sum(sad128_internal_u16 s) {
+  uint64x2_t t = vpaddlq_u32(s);
+  return (uint32_t)(uint64_t)vget_high_u64(t) +
+         (uint32_t)(uint64_t)vget_low_u64(t);
+}
+
+typedef v128 ssd128_internal_s16;
+SIMD_INLINE ssd128_internal_s16 v128_ssd_s16_init() { return v128_zero(); }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v128_ssd_s16_sum(). */
+SIMD_INLINE ssd128_internal_s16 v128_ssd_s16(ssd128_internal_s16 s, v128 a,
+                                             v128 b) {
+  v128 d = v128_sub_16(a, b);
+  d = v128_madd_s16(d, d);
+  return v128_add_64(
+      s, vreinterpretq_s64_u64(vpaddlq_u32(vreinterpretq_u32_s64(d))));
+}
+
+SIMD_INLINE uint64_t v128_ssd_s16_sum(ssd128_internal_s16 s) {
+  return v64_u64(v128_low_v64(s)) + v64_u64(v128_high_v64(s));
+}
+
+#endif  // AOM_AOM_DSP_SIMD_V128_INTRINSICS_ARM_H_
diff --git a/third_party/aom/aom_dsp/simd/v128_intrinsics_c.h b/third_party/aom/aom_dsp/simd/v128_intrinsics_c.h
new file mode 100644
index 0000000000..bbe9a9d281
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v128_intrinsics_c.h
@@ -0,0 +1,888 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V128_INTRINSICS_C_H_
+#define AOM_AOM_DSP_SIMD_V128_INTRINSICS_C_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "config/aom_config.h"
+
+#include "aom_dsp/simd/v64_intrinsics_c.h"
+
+typedef union {
+  uint8_t u8[16];
+  uint16_t u16[8];
+  uint32_t u32[4];
+  uint64_t u64[2];
+  int8_t s8[16];
+  int16_t s16[8];
+  int32_t s32[4];
+  int64_t s64[2];
+  c_v64 v64[2];
+} c_v128;
+
+SIMD_INLINE uint32_t c_v128_low_u32(c_v128 a) { return a.u32[0]; }
+
+SIMD_INLINE c_v64 c_v128_low_v64(c_v128 a) { return a.v64[0]; }
+
+SIMD_INLINE c_v64 c_v128_high_v64(c_v128 a) { return a.v64[1]; }
+
+SIMD_INLINE c_v128 c_v128_from_64(uint64_t hi, uint64_t lo) {
+  c_v128 t;
+  t.u64[1] = hi;
+  t.u64[0] = lo;
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_from_v64(c_v64 hi, c_v64 lo) {
+  c_v128 t;
+  t.v64[1] = hi;
+  t.v64[0] = lo;
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_from_32(uint32_t a, uint32_t b, uint32_t c,
+                                  uint32_t d) {
+  c_v128 t;
+  t.u32[3] = a;
+  t.u32[2] = b;
+  t.u32[1] = c;
+  t.u32[0] = d;
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_load_unaligned(const void *p) {
+  c_v128 t;
+  uint8_t *pp = (uint8_t *)p;
+  uint8_t *q = (uint8_t *)&t;
+  int c;
+  for (c = 0; c < 16; c++) q[c] = pp[c];
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_load_aligned(const void *p) {
+  if (SIMD_CHECK && (uintptr_t)p & 15) {
+    fprintf(stderr, "Error: unaligned v128 load at %p\n", p);
+    abort();
+  }
+  return c_v128_load_unaligned(p);
+}
+
+SIMD_INLINE void c_v128_store_unaligned(void *p, c_v128 a) {
+  uint8_t *pp = (uint8_t *)p;
+  uint8_t *q = (uint8_t *)&a;
+  int c;
+  for (c = 0; c < 16; c++) pp[c] = q[c];
+}
+
+SIMD_INLINE void c_v128_store_aligned(void *p, c_v128 a) {
+  if (SIMD_CHECK && (uintptr_t)p & 15) {
+    fprintf(stderr, "Error: unaligned v128 store at %p\n", p);
+    abort();
+  }
+  c_v128_store_unaligned(p, a);
+}
+
+SIMD_INLINE c_v128 c_v128_zero() {
+  c_v128 t;
+  t.u64[1] = t.u64[0] = 0;
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_dup_8(uint8_t x) {
+  c_v128 t;
+  t.v64[1] = t.v64[0] = c_v64_dup_8(x);
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_dup_16(uint16_t x) {
+  c_v128 t;
+  t.v64[1] = t.v64[0] = c_v64_dup_16(x);
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_dup_32(uint32_t x) {
+  c_v128 t;
+  t.v64[1] = t.v64[0] = c_v64_dup_32(x);
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_dup_64(uint64_t x) {
+  c_v128 t;
+  t.u64[1] = t.u64[0] = x;
+  return t;
+}
+
+SIMD_INLINE int64_t c_v128_dotp_su8(c_v128 a, c_v128 b) {
+  return c_v64_dotp_su8(a.v64[1], b.v64[1]) +
+         c_v64_dotp_su8(a.v64[0], b.v64[0]);
+}
+
+SIMD_INLINE int64_t c_v128_dotp_s16(c_v128 a, c_v128 b) {
+  return c_v64_dotp_s16(a.v64[1], b.v64[1]) +
+         c_v64_dotp_s16(a.v64[0], b.v64[0]);
+}
+
+SIMD_INLINE int64_t c_v128_dotp_s32(c_v128 a, c_v128 b) {
+  // 32 bit products, 64 bit sum
+  return (int64_t)(int32_t)((int64_t)a.s32[3] * b.s32[3]) +
+         (int64_t)(int32_t)((int64_t)a.s32[2] * b.s32[2]) +
+         (int64_t)(int32_t)((int64_t)a.s32[1] * b.s32[1]) +
+         (int64_t)(int32_t)((int64_t)a.s32[0] * b.s32[0]);
+}
+
+SIMD_INLINE uint64_t c_v128_hadd_u8(c_v128 a) {
+  return c_v64_hadd_u8(a.v64[1]) + c_v64_hadd_u8(a.v64[0]);
+}
+
+typedef uint32_t c_sad128_internal;
+
+SIMD_INLINE c_sad128_internal c_v128_sad_u8_init() { return 0; }
+
+/* Implementation dependent return value.  Result must be finalised with
+   v128_sad_u8_sum().
+   The result for more than 32 v128_sad_u8() calls is undefined. */
+SIMD_INLINE c_sad128_internal c_v128_sad_u8(c_sad128_internal s, c_v128 a,
+                                            c_v128 b) {
+  int c;
+  for (c = 0; c < 16; c++)
+    s += a.u8[c] > b.u8[c] ? a.u8[c] - b.u8[c] : b.u8[c] - a.u8[c];
+  return s;
+}
+
+SIMD_INLINE uint32_t c_v128_sad_u8_sum(c_sad128_internal s) { return s; }
+
+typedef uint32_t c_ssd128_internal;
+
+SIMD_INLINE c_ssd128_internal c_v128_ssd_u8_init() { return 0; }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v128_ssd_u8_sum(). */
+SIMD_INLINE c_ssd128_internal c_v128_ssd_u8(c_ssd128_internal s, c_v128 a,
+                                            c_v128 b) {
+  int c;
+  for (c = 0; c < 16; c++) s += (a.u8[c] - b.u8[c]) * (a.u8[c] - b.u8[c]);
+  return s;
+}
+
+SIMD_INLINE uint32_t c_v128_ssd_u8_sum(c_ssd128_internal s) { return s; }
+
+SIMD_INLINE c_v128 c_v128_or(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_or(a.v64[1], b.v64[1]),
+                         c_v64_or(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_xor(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_xor(a.v64[1], b.v64[1]),
+                         c_v64_xor(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_and(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_and(a.v64[1], b.v64[1]),
+                         c_v64_and(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_andn(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_andn(a.v64[1], b.v64[1]),
+                         c_v64_andn(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_add_8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_add_8(a.v64[1], b.v64[1]),
+                         c_v64_add_8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_add_16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_add_16(a.v64[1], b.v64[1]),
+                         c_v64_add_16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_sadd_u8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_sadd_u8(a.v64[1], b.v64[1]),
+                         c_v64_sadd_u8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_sadd_s8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_sadd_s8(a.v64[1], b.v64[1]),
+                         c_v64_sadd_s8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_sadd_s16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_sadd_s16(a.v64[1], b.v64[1]),
+                         c_v64_sadd_s16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_add_32(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_add_32(a.v64[1], b.v64[1]),
+                         c_v64_add_32(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_add_64(c_v128 a, c_v128 b) {
+  // Two complement overflow (silences sanitizers)
+  return c_v128_from_64(
+      a.v64[1].u64 > ~b.v64[1].u64 ? a.v64[1].u64 - ~b.v64[1].u64 - 1
+                                   : a.v64[1].u64 + b.v64[1].u64,
+      a.v64[0].u64 > ~b.v64[0].u64 ? a.v64[0].u64 - ~b.v64[0].u64 - 1
+                                   : a.v64[0].u64 + b.v64[0].u64);
+}
+
+SIMD_INLINE c_v128 c_v128_padd_s16(c_v128 a) {
+  c_v128 t;
+  t.s32[0] = (int32_t)a.s16[0] + (int32_t)a.s16[1];
+  t.s32[1] = (int32_t)a.s16[2] + (int32_t)a.s16[3];
+  t.s32[2] = (int32_t)a.s16[4] + (int32_t)a.s16[5];
+  t.s32[3] = (int32_t)a.s16[6] + (int32_t)a.s16[7];
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_padd_u8(c_v128 a) {
+  c_v128 t;
+  t.u16[0] = (uint16_t)a.u8[0] + (uint16_t)a.u8[1];
+  t.u16[1] = (uint16_t)a.u8[2] + (uint16_t)a.u8[3];
+  t.u16[2] = (uint16_t)a.u8[4] + (uint16_t)a.u8[5];
+  t.u16[3] = (uint16_t)a.u8[6] + (uint16_t)a.u8[7];
+  t.u16[4] = (uint16_t)a.u8[8] + (uint16_t)a.u8[9];
+  t.u16[5] = (uint16_t)a.u8[10] + (uint16_t)a.u8[11];
+  t.u16[6] = (uint16_t)a.u8[12] + (uint16_t)a.u8[13];
+  t.u16[7] = (uint16_t)a.u8[14] + (uint16_t)a.u8[15];
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_sub_8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_sub_8(a.v64[1], b.v64[1]),
+                         c_v64_sub_8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_ssub_u8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_ssub_u8(a.v64[1], b.v64[1]),
+                         c_v64_ssub_u8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_ssub_s8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_ssub_s8(a.v64[1], b.v64[1]),
+                         c_v64_ssub_s8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_sub_16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_sub_16(a.v64[1], b.v64[1]),
+                         c_v64_sub_16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_ssub_s16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_ssub_s16(a.v64[1], b.v64[1]),
+                         c_v64_ssub_s16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_ssub_u16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_ssub_u16(a.v64[1], b.v64[1]),
+                         c_v64_ssub_u16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_sub_32(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_sub_32(a.v64[1], b.v64[1]),
+                         c_v64_sub_32(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_sub_64(c_v128 a, c_v128 b) {
+  // Two complement underflow (silences sanitizers)
+  return c_v128_from_64(
+      a.v64[1].u64 < b.v64[1].u64 ? a.v64[1].u64 + ~b.v64[1].u64 + 1
+                                  : a.v64[1].u64 - b.v64[1].u64,
+      a.v64[0].u64 < b.v64[0].u64 ? a.v64[0].u64 + ~b.v64[0].u64 + 1
+                                  : a.v64[0].u64 - b.v64[0].u64);
+}
+
+SIMD_INLINE c_v128 c_v128_abs_s16(c_v128 a) {
+  return c_v128_from_v64(c_v64_abs_s16(a.v64[1]), c_v64_abs_s16(a.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_abs_s8(c_v128 a) {
+  return c_v128_from_v64(c_v64_abs_s8(a.v64[1]), c_v64_abs_s8(a.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_mul_s16(c_v64 a, c_v64 b) {
+  c_v64 lo_bits = c_v64_mullo_s16(a, b);
+  c_v64 hi_bits = c_v64_mulhi_s16(a, b);
+  return c_v128_from_v64(c_v64_ziphi_16(hi_bits, lo_bits),
+                         c_v64_ziplo_16(hi_bits, lo_bits));
+}
+
+SIMD_INLINE c_v128 c_v128_mullo_s16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_mullo_s16(a.v64[1], b.v64[1]),
+                         c_v64_mullo_s16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_mulhi_s16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_mulhi_s16(a.v64[1], b.v64[1]),
+                         c_v64_mulhi_s16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_mullo_s32(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_mullo_s32(a.v64[1], b.v64[1]),
+                         c_v64_mullo_s32(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_madd_s16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_madd_s16(a.v64[1], b.v64[1]),
+                         c_v64_madd_s16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_madd_us8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_madd_us8(a.v64[1], b.v64[1]),
+                         c_v64_madd_us8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_avg_u8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_avg_u8(a.v64[1], b.v64[1]),
+                         c_v64_avg_u8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_rdavg_u8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_rdavg_u8(a.v64[1], b.v64[1]),
+                         c_v64_rdavg_u8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_rdavg_u16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_rdavg_u16(a.v64[1], b.v64[1]),
+                         c_v64_rdavg_u16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_avg_u16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_avg_u16(a.v64[1], b.v64[1]),
+                         c_v64_avg_u16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_min_u8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_min_u8(a.v64[1], b.v64[1]),
+                         c_v64_min_u8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_max_u8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_max_u8(a.v64[1], b.v64[1]),
+                         c_v64_max_u8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_min_s8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_min_s8(a.v64[1], b.v64[1]),
+                         c_v64_min_s8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE uint32_t c_v128_movemask_8(c_v128 a) {
+  return ((a.s8[15] < 0) << 15) | ((a.s8[14] < 0) << 14) |
+         ((a.s8[13] < 0) << 13) | ((a.s8[12] < 0) << 12) |
+         ((a.s8[11] < 0) << 11) | ((a.s8[10] < 0) << 10) |
+         ((a.s8[9] < 0) << 9) | ((a.s8[8] < 0) << 8) | ((a.s8[7] < 0) << 7) |
+         ((a.s8[6] < 0) << 6) | ((a.s8[5] < 0) << 5) | ((a.s8[4] < 0) << 4) |
+         ((a.s8[3] < 0) << 3) | ((a.s8[2] < 0) << 2) | ((a.s8[1] < 0) << 1) |
+         ((a.s8[0] < 0) << 0);
+}
+
+SIMD_INLINE c_v128 c_v128_blend_8(c_v128 a, c_v128 b, c_v128 c) {
+  c_v128 t;
+  for (int i = 0; i < 16; i++) t.u8[i] = c.s8[i] < 0 ? b.u8[i] : a.u8[i];
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_max_s8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_max_s8(a.v64[1], b.v64[1]),
+                         c_v64_max_s8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_min_s16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_min_s16(a.v64[1], b.v64[1]),
+                         c_v64_min_s16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_max_s16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_max_s16(a.v64[1], b.v64[1]),
+                         c_v64_max_s16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_max_s32(c_v128 a, c_v128 b) {
+  c_v128 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s32[c] = a.s32[c] > b.s32[c] ? a.s32[c] : b.s32[c];
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_min_s32(c_v128 a, c_v128 b) {
+  c_v128 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s32[c] = a.s32[c] > b.s32[c] ? b.s32[c] : a.s32[c];
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_ziplo_8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_ziphi_8(a.v64[0], b.v64[0]),
+                         c_v64_ziplo_8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_ziphi_8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_ziphi_8(a.v64[1], b.v64[1]),
+                         c_v64_ziplo_8(a.v64[1], b.v64[1]));
+}
+
+SIMD_INLINE c_v128 c_v128_ziplo_16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_ziphi_16(a.v64[0], b.v64[0]),
+                         c_v64_ziplo_16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_ziphi_16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_ziphi_16(a.v64[1], b.v64[1]),
+                         c_v64_ziplo_16(a.v64[1], b.v64[1]));
+}
+
+SIMD_INLINE c_v128 c_v128_ziplo_32(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_ziphi_32(a.v64[0], b.v64[0]),
+                         c_v64_ziplo_32(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_ziphi_32(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_ziphi_32(a.v64[1], b.v64[1]),
+                         c_v64_ziplo_32(a.v64[1], b.v64[1]));
+}
+
+SIMD_INLINE c_v128 c_v128_ziplo_64(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(a.v64[0], b.v64[0]);
+}
+
+SIMD_INLINE c_v128 c_v128_ziphi_64(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(a.v64[1], b.v64[1]);
+}
+
+SIMD_INLINE c_v128 c_v128_zip_8(c_v64 a, c_v64 b) {
+  return c_v128_from_v64(c_v64_ziphi_8(a, b), c_v64_ziplo_8(a, b));
+}
+
+SIMD_INLINE c_v128 c_v128_zip_16(c_v64 a, c_v64 b) {
+  return c_v128_from_v64(c_v64_ziphi_16(a, b), c_v64_ziplo_16(a, b));
+}
+
+SIMD_INLINE c_v128 c_v128_zip_32(c_v64 a, c_v64 b) {
+  return c_v128_from_v64(c_v64_ziphi_32(a, b), c_v64_ziplo_32(a, b));
+}
+
+SIMD_INLINE c_v128 _c_v128_unzip_8(c_v128 a, c_v128 b, int mode) {
+  c_v128 t;
+  if (mode) {
+    t.u8[15] = b.u8[15];
+    t.u8[14] = b.u8[13];
+    t.u8[13] = b.u8[11];
+    t.u8[12] = b.u8[9];
+    t.u8[11] = b.u8[7];
+    t.u8[10] = b.u8[5];
+    t.u8[9] = b.u8[3];
+    t.u8[8] = b.u8[1];
+    t.u8[7] = a.u8[15];
+    t.u8[6] = a.u8[13];
+    t.u8[5] = a.u8[11];
+    t.u8[4] = a.u8[9];
+    t.u8[3] = a.u8[7];
+    t.u8[2] = a.u8[5];
+    t.u8[1] = a.u8[3];
+    t.u8[0] = a.u8[1];
+  } else {
+    t.u8[15] = a.u8[14];
+    t.u8[14] = a.u8[12];
+    t.u8[13] = a.u8[10];
+    t.u8[12] = a.u8[8];
+    t.u8[11] = a.u8[6];
+    t.u8[10] = a.u8[4];
+    t.u8[9] = a.u8[2];
+    t.u8[8] = a.u8[0];
+    t.u8[7] = b.u8[14];
+    t.u8[6] = b.u8[12];
+    t.u8[5] = b.u8[10];
+    t.u8[4] = b.u8[8];
+    t.u8[3] = b.u8[6];
+    t.u8[2] = b.u8[4];
+    t.u8[1] = b.u8[2];
+    t.u8[0] = b.u8[0];
+  }
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_unziplo_8(c_v128 a, c_v128 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v128_unzip_8(a, b, 1)
+                           : _c_v128_unzip_8(a, b, 0);
+}
+
+SIMD_INLINE c_v128 c_v128_unziphi_8(c_v128 a, c_v128 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v128_unzip_8(b, a, 0)
+                           : _c_v128_unzip_8(b, a, 1);
+}
+
+SIMD_INLINE c_v128 _c_v128_unzip_16(c_v128 a, c_v128 b, int mode) {
+  c_v128 t;
+  if (mode) {
+    t.u16[7] = b.u16[7];
+    t.u16[6] = b.u16[5];
+    t.u16[5] = b.u16[3];
+    t.u16[4] = b.u16[1];
+    t.u16[3] = a.u16[7];
+    t.u16[2] = a.u16[5];
+    t.u16[1] = a.u16[3];
+    t.u16[0] = a.u16[1];
+  } else {
+    t.u16[7] = a.u16[6];
+    t.u16[6] = a.u16[4];
+    t.u16[5] = a.u16[2];
+    t.u16[4] = a.u16[0];
+    t.u16[3] = b.u16[6];
+    t.u16[2] = b.u16[4];
+    t.u16[1] = b.u16[2];
+    t.u16[0] = b.u16[0];
+  }
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_unziplo_16(c_v128 a, c_v128 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v128_unzip_16(a, b, 1)
+                           : _c_v128_unzip_16(a, b, 0);
+}
+
+SIMD_INLINE c_v128 c_v128_unziphi_16(c_v128 a, c_v128 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v128_unzip_16(b, a, 0)
+                           : _c_v128_unzip_16(b, a, 1);
+}
+
+SIMD_INLINE c_v128 _c_v128_unzip_32(c_v128 a, c_v128 b, int mode) {
+  c_v128 t;
+  if (mode) {
+    t.u32[3] = b.u32[3];
+    t.u32[2] = b.u32[1];
+    t.u32[1] = a.u32[3];
+    t.u32[0] = a.u32[1];
+  } else {
+    t.u32[3] = a.u32[2];
+    t.u32[2] = a.u32[0];
+    t.u32[1] = b.u32[2];
+    t.u32[0] = b.u32[0];
+  }
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_unziplo_32(c_v128 a, c_v128 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v128_unzip_32(a, b, 1)
+                           : _c_v128_unzip_32(a, b, 0);
+}
+
+SIMD_INLINE c_v128 c_v128_unziphi_32(c_v128 a, c_v128 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v128_unzip_32(b, a, 0)
+                           : _c_v128_unzip_32(b, a, 1);
+}
+
+SIMD_INLINE c_v128 c_v128_unpack_u8_s16(c_v64 a) {
+  return c_v128_from_v64(c_v64_unpackhi_u8_s16(a), c_v64_unpacklo_u8_s16(a));
+}
+
+SIMD_INLINE c_v128 c_v128_unpacklo_u8_s16(c_v128 a) {
+  return c_v128_from_v64(c_v64_unpackhi_u8_s16(a.v64[0]),
+                         c_v64_unpacklo_u8_s16(a.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_unpackhi_u8_s16(c_v128 a) {
+  return c_v128_from_v64(c_v64_unpackhi_u8_s16(a.v64[1]),
+                         c_v64_unpacklo_u8_s16(a.v64[1]));
+}
+
+SIMD_INLINE c_v128 c_v128_unpack_s8_s16(c_v64 a) {
+  return c_v128_from_v64(c_v64_unpackhi_s8_s16(a), c_v64_unpacklo_s8_s16(a));
+}
+
+SIMD_INLINE c_v128 c_v128_unpacklo_s8_s16(c_v128 a) {
+  return c_v128_from_v64(c_v64_unpackhi_s8_s16(a.v64[0]),
+                         c_v64_unpacklo_s8_s16(a.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_unpackhi_s8_s16(c_v128 a) {
+  return c_v128_from_v64(c_v64_unpackhi_s8_s16(a.v64[1]),
+                         c_v64_unpacklo_s8_s16(a.v64[1]));
+}
+
+SIMD_INLINE c_v128 c_v128_pack_s32_s16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_pack_s32_s16(a.v64[1], a.v64[0]),
+                         c_v64_pack_s32_s16(b.v64[1], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_pack_s32_u16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_pack_s32_u16(a.v64[1], a.v64[0]),
+                         c_v64_pack_s32_u16(b.v64[1], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_pack_s16_u8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_pack_s16_u8(a.v64[1], a.v64[0]),
+                         c_v64_pack_s16_u8(b.v64[1], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_pack_s16_s8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_pack_s16_s8(a.v64[1], a.v64[0]),
+                         c_v64_pack_s16_s8(b.v64[1], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_unpack_u16_s32(c_v64 a) {
+  return c_v128_from_v64(c_v64_unpackhi_u16_s32(a), c_v64_unpacklo_u16_s32(a));
+}
+
+SIMD_INLINE c_v128 c_v128_unpack_s16_s32(c_v64 a) {
+  return c_v128_from_v64(c_v64_unpackhi_s16_s32(a), c_v64_unpacklo_s16_s32(a));
+}
+
+SIMD_INLINE c_v128 c_v128_unpacklo_u16_s32(c_v128 a) {
+  return c_v128_from_v64(c_v64_unpackhi_u16_s32(a.v64[0]),
+                         c_v64_unpacklo_u16_s32(a.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_unpacklo_s16_s32(c_v128 a) {
+  return c_v128_from_v64(c_v64_unpackhi_s16_s32(a.v64[0]),
+                         c_v64_unpacklo_s16_s32(a.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_unpackhi_u16_s32(c_v128 a) {
+  return c_v128_from_v64(c_v64_unpackhi_u16_s32(a.v64[1]),
+                         c_v64_unpacklo_u16_s32(a.v64[1]));
+}
+
+SIMD_INLINE c_v128 c_v128_unpackhi_s16_s32(c_v128 a) {
+  return c_v128_from_v64(c_v64_unpackhi_s16_s32(a.v64[1]),
+                         c_v64_unpacklo_s16_s32(a.v64[1]));
+}
+
+SIMD_INLINE c_v128 c_v128_shuffle_8(c_v128 a, c_v128 pattern) {
+  c_v128 t;
+  int c;
+  for (c = 0; c < 16; c++)
+    t.u8[c] = a.u8[CONFIG_BIG_ENDIAN ? 15 - (pattern.u8[c] & 15)
+                                     : pattern.u8[c] & 15];
+
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_cmpgt_s8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_cmpgt_s8(a.v64[1], b.v64[1]),
+                         c_v64_cmpgt_s8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_cmplt_s8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_cmplt_s8(a.v64[1], b.v64[1]),
+                         c_v64_cmplt_s8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_cmpeq_8(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_cmpeq_8(a.v64[1], b.v64[1]),
+                         c_v64_cmpeq_8(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_cmpgt_s16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_cmpgt_s16(a.v64[1], b.v64[1]),
+                         c_v64_cmpgt_s16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_cmplt_s16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_cmplt_s16(a.v64[1], b.v64[1]),
+                         c_v64_cmplt_s16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_cmpeq_16(c_v128 a, c_v128 b) {
+  return c_v128_from_v64(c_v64_cmpeq_16(a.v64[1], b.v64[1]),
+                         c_v64_cmpeq_16(a.v64[0], b.v64[0]));
+}
+
+SIMD_INLINE c_v128 c_v128_cmpgt_s32(c_v128 a, c_v128 b) {
+  c_v128 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s32[c] = -(a.s32[c] > b.s32[c]);
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_cmplt_s32(c_v128 a, c_v128 b) {
+  c_v128 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s32[c] = -(a.s32[c] < b.s32[c]);
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_cmpeq_32(c_v128 a, c_v128 b) {
+  c_v128 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s32[c] = -(a.s32[c] == b.s32[c]);
+  return t;
+}
+
+SIMD_INLINE c_v128 c_v128_shl_n_byte(c_v128 a, const unsigned int n) {
+  if (n < 8)
+    return c_v128_from_v64(c_v64_or(c_v64_shl_n_byte(a.v64[1], n),
+                                    c_v64_shr_n_byte(a.v64[0], 8 - n)),
+                           c_v64_shl_n_byte(a.v64[0], n));
+  else
+    return c_v128_from_v64(c_v64_shl_n_byte(a.v64[0], n - 8), c_v64_zero());
+}
+
+SIMD_INLINE c_v128 c_v128_shr_n_byte(c_v128 a, const unsigned int n) {
+  if (n < 8)
+    return c_v128_from_v64(c_v64_shr_n_byte(a.v64[1], n),
+                           c_v64_or(c_v64_shr_n_byte(a.v64[0], n),
+                                    c_v64_shl_n_byte(a.v64[1], 8 - n)));
+  else
+    return c_v128_from_v64(c_v64_zero(), c_v64_shr_n_byte(a.v64[1], n - 8));
+}
+
+SIMD_INLINE c_v128 c_v128_align(c_v128 a, c_v128 b, const unsigned int c) {
+  if (SIMD_CHECK && c > 15) {
+    fprintf(stderr, "Error: undefined alignment %d\n", c);
+    abort();
+  }
+  return c ? c_v128_or(c_v128_shr_n_byte(b, c), c_v128_shl_n_byte(a, 16 - c))
+           : b;
+}
+
+SIMD_INLINE c_v128 c_v128_shl_8(c_v128 a, const unsigned int c) {
+  return c_v128_from_v64(c_v64_shl_8(a.v64[1], c), c_v64_shl_8(a.v64[0], c));
+}
+
+SIMD_INLINE c_v128 c_v128_shr_u8(c_v128 a, const unsigned int c) {
+  return c_v128_from_v64(c_v64_shr_u8(a.v64[1], c), c_v64_shr_u8(a.v64[0], c));
+}
+
+SIMD_INLINE c_v128 c_v128_shr_s8(c_v128 a, const unsigned int c) {
+  return c_v128_from_v64(c_v64_shr_s8(a.v64[1], c), c_v64_shr_s8(a.v64[0], c));
+}
+
+SIMD_INLINE c_v128 c_v128_shl_16(c_v128 a, const unsigned int c) {
+  return c_v128_from_v64(c_v64_shl_16(a.v64[1], c), c_v64_shl_16(a.v64[0], c));
+}
+
+SIMD_INLINE c_v128 c_v128_shr_u16(c_v128 a, const unsigned int c) {
+  return c_v128_from_v64(c_v64_shr_u16(a.v64[1], c),
+                         c_v64_shr_u16(a.v64[0], c));
+}
+
+SIMD_INLINE c_v128 c_v128_shr_s16(c_v128 a, const unsigned int c) {
+  return c_v128_from_v64(c_v64_shr_s16(a.v64[1], c),
+                         c_v64_shr_s16(a.v64[0], c));
+}
+
+SIMD_INLINE c_v128 c_v128_shl_32(c_v128 a, const unsigned int c) {
+  return c_v128_from_v64(c_v64_shl_32(a.v64[1], c), c_v64_shl_32(a.v64[0], c));
+}
+
+SIMD_INLINE c_v128 c_v128_shr_u32(c_v128 a, const unsigned int c) {
+  return c_v128_from_v64(c_v64_shr_u32(a.v64[1], c),
+                         c_v64_shr_u32(a.v64[0], c));
+}
+
+SIMD_INLINE c_v128 c_v128_shr_s32(c_v128 a, const unsigned int c) {
+  return c_v128_from_v64(c_v64_shr_s32(a.v64[1], c),
+                         c_v64_shr_s32(a.v64[0], c));
+}
+
+SIMD_INLINE c_v128 c_v128_shl_64(c_v128 a, const unsigned int c) {
+  a.v64[1].u64 <<= c;
+  a.v64[0].u64 <<= c;
+  return c_v128_from_v64(a.v64[1], a.v64[0]);
+}
+
+SIMD_INLINE c_v128 c_v128_shr_u64(c_v128 a, const unsigned int c) {
+  a.v64[1].u64 >>= c;
+  a.v64[0].u64 >>= c;
+  return c_v128_from_v64(a.v64[1], a.v64[0]);
+}
+
+SIMD_INLINE c_v128 c_v128_shr_s64(c_v128 a, const unsigned int c) {
+  a.v64[1].s64 >>= c;
+  a.v64[0].s64 >>= c;
+  return c_v128_from_v64(a.v64[1], a.v64[0]);
+}
+
+SIMD_INLINE c_v128 c_v128_shl_n_8(c_v128 a, const unsigned int n) {
+  return c_v128_shl_8(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shl_n_16(c_v128 a, const unsigned int n) {
+  return c_v128_shl_16(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shl_n_32(c_v128 a, const unsigned int n) {
+  return c_v128_shl_32(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shl_n_64(c_v128 a, const unsigned int n) {
+  return c_v128_shl_64(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shr_n_u8(c_v128 a, const unsigned int n) {
+  return c_v128_shr_u8(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shr_n_u16(c_v128 a, const unsigned int n) {
+  return c_v128_shr_u16(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shr_n_u32(c_v128 a, const unsigned int n) {
+  return c_v128_shr_u32(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shr_n_u64(c_v128 a, const unsigned int n) {
+  return c_v128_shr_u64(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shr_n_s8(c_v128 a, const unsigned int n) {
+  return c_v128_shr_s8(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shr_n_s16(c_v128 a, const unsigned int n) {
+  return c_v128_shr_s16(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shr_n_s32(c_v128 a, const unsigned int n) {
+  return c_v128_shr_s32(a, n);
+}
+
+SIMD_INLINE c_v128 c_v128_shr_n_s64(c_v128 a, const unsigned int n) {
+  return c_v128_shr_s64(a, n);
+}
+
+typedef uint32_t c_sad128_internal_u16;
+
+SIMD_INLINE c_sad128_internal_u16 c_v128_sad_u16_init() { return 0; }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v128_sad_u16_sum(). */
+SIMD_INLINE c_sad128_internal_u16 c_v128_sad_u16(c_sad128_internal_u16 s,
+                                                 c_v128 a, c_v128 b) {
+  int c;
+  for (c = 0; c < 8; c++)
+    s += a.u16[c] > b.u16[c] ? a.u16[c] - b.u16[c] : b.u16[c] - a.u16[c];
+  return s;
+}
+
+SIMD_INLINE uint32_t c_v128_sad_u16_sum(c_sad128_internal_u16 s) { return s; }
+
+typedef uint64_t c_ssd128_internal_s16;
+
+SIMD_INLINE c_ssd128_internal_s16 c_v128_ssd_s16_init() { return 0; }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v128_ssd_s16_sum(). */
+SIMD_INLINE c_ssd128_internal_s16 c_v128_ssd_s16(c_ssd128_internal_s16 s,
+                                                 c_v128 a, c_v128 b) {
+  int c;
+  for (c = 0; c < 8; c++)
+    s += (int32_t)(int16_t)(a.s16[c] - b.s16[c]) *
+         (int32_t)(int16_t)(a.s16[c] - b.s16[c]);
+  return s;
+}
+
+SIMD_INLINE uint64_t c_v128_ssd_s16_sum(c_ssd128_internal_s16 s) { return s; }
+
+#endif  // AOM_AOM_DSP_SIMD_V128_INTRINSICS_C_H_
diff --git a/third_party/aom/aom_dsp/simd/v128_intrinsics_x86.h b/third_party/aom/aom_dsp/simd/v128_intrinsics_x86.h
new file mode 100644
index 0000000000..6c7241ff4f
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v128_intrinsics_x86.h
@@ -0,0 +1,656 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V128_INTRINSICS_X86_H_
+#define AOM_AOM_DSP_SIMD_V128_INTRINSICS_X86_H_
+
+#include <stdint.h>
+#include "aom_dsp/simd/v64_intrinsics_x86.h"
+
+typedef __m128i v128;
+
+SIMD_INLINE uint32_t v128_low_u32(v128 a) {
+  return (uint32_t)_mm_cvtsi128_si32(a);
+}
+
+SIMD_INLINE v64 v128_low_v64(v128 a) {
+  return _mm_unpacklo_epi64(a, v64_zero());
+}
+
+SIMD_INLINE v64 v128_high_v64(v128 a) { return _mm_srli_si128(a, 8); }
+
+SIMD_INLINE v128 v128_from_v64(v64 a, v64 b) {
+  return _mm_unpacklo_epi64(b, a);
+}
+
+SIMD_INLINE v128 v128_from_64(uint64_t a, uint64_t b) {
+  return v128_from_v64(v64_from_64(a), v64_from_64(b));
+}
+
+SIMD_INLINE v128 v128_from_32(uint32_t a, uint32_t b, uint32_t c, uint32_t d) {
+  return _mm_set_epi32(a, b, c, d);
+}
+
+SIMD_INLINE v128 v128_load_aligned(const void *p) {
+  return _mm_load_si128((__m128i *)p);
+}
+
+SIMD_INLINE v128 v128_load_unaligned(const void *p) {
+#if defined(__SSSE3__)
+  return (__m128i)_mm_lddqu_si128((__m128i *)p);
+#else
+  return _mm_loadu_si128((__m128i *)p);
+#endif
+}
+
+SIMD_INLINE void v128_store_aligned(void *p, v128 a) {
+  _mm_store_si128((__m128i *)p, a);
+}
+
+SIMD_INLINE void v128_store_unaligned(void *p, v128 a) {
+  _mm_storeu_si128((__m128i *)p, a);
+}
+
+// The following function requires an immediate.
+// Some compilers will check this during optimisation, others wont.
+#if defined(__OPTIMIZE__) && __OPTIMIZE__ && !defined(__clang__)
+#if defined(__SSSE3__)
+SIMD_INLINE v128 v128_align(v128 a, v128 b, const unsigned int c) {
+  return c ? _mm_alignr_epi8(a, b, c) : b;
+}
+#else
+#define v128_align(a, b, c) \
+  ((c) ? _mm_or_si128(_mm_srli_si128(b, c), _mm_slli_si128(a, 16 - (c))) : (b))
+#endif
+#else
+#if defined(__SSSE3__)
+#define v128_align(a, b, c) ((c) ? _mm_alignr_epi8(a, b, (uint8_t)(c)) : (b))
+#else
+#define v128_align(a, b, c) \
+  ((c) ? _mm_or_si128(_mm_srli_si128(b, c), _mm_slli_si128(a, 16 - (c))) : (b))
+#endif
+#endif
+
+SIMD_INLINE v128 v128_zero() { return _mm_setzero_si128(); }
+
+SIMD_INLINE v128 v128_dup_8(uint8_t x) { return _mm_set1_epi8(x); }
+
+SIMD_INLINE v128 v128_dup_16(uint16_t x) { return _mm_set1_epi16(x); }
+
+SIMD_INLINE v128 v128_dup_32(uint32_t x) { return _mm_set1_epi32(x); }
+
+SIMD_INLINE v128 v128_dup_64(uint64_t x) {
+  // _mm_set_pi64x and _mm_cvtsi64x_si64 missing in some compilers
+  return _mm_set_epi32(x >> 32, (uint32_t)x, x >> 32, (uint32_t)x);
+}
+
+SIMD_INLINE v128 v128_add_8(v128 a, v128 b) { return _mm_add_epi8(a, b); }
+
+SIMD_INLINE v128 v128_add_16(v128 a, v128 b) { return _mm_add_epi16(a, b); }
+
+SIMD_INLINE v128 v128_sadd_u8(v128 a, v128 b) { return _mm_adds_epu8(a, b); }
+
+SIMD_INLINE v128 v128_sadd_s8(v128 a, v128 b) { return _mm_adds_epi8(a, b); }
+
+SIMD_INLINE v128 v128_sadd_s16(v128 a, v128 b) { return _mm_adds_epi16(a, b); }
+
+SIMD_INLINE v128 v128_add_32(v128 a, v128 b) { return _mm_add_epi32(a, b); }
+
+SIMD_INLINE v128 v128_add_64(v128 a, v128 b) { return _mm_add_epi64(a, b); }
+
+SIMD_INLINE v128 v128_padd_s16(v128 a) {
+  return _mm_madd_epi16(a, _mm_set1_epi16(1));
+}
+
+SIMD_INLINE v128 v128_sub_8(v128 a, v128 b) { return _mm_sub_epi8(a, b); }
+
+SIMD_INLINE v128 v128_ssub_u8(v128 a, v128 b) { return _mm_subs_epu8(a, b); }
+
+SIMD_INLINE v128 v128_ssub_s8(v128 a, v128 b) { return _mm_subs_epi8(a, b); }
+
+SIMD_INLINE v128 v128_sub_16(v128 a, v128 b) { return _mm_sub_epi16(a, b); }
+
+SIMD_INLINE v128 v128_ssub_s16(v128 a, v128 b) { return _mm_subs_epi16(a, b); }
+
+SIMD_INLINE v128 v128_ssub_u16(v128 a, v128 b) { return _mm_subs_epu16(a, b); }
+
+SIMD_INLINE v128 v128_sub_32(v128 a, v128 b) { return _mm_sub_epi32(a, b); }
+
+SIMD_INLINE v128 v128_sub_64(v128 a, v128 b) { return _mm_sub_epi64(a, b); }
+
+SIMD_INLINE v128 v128_abs_s16(v128 a) {
+#if defined(__SSSE3__)
+  return _mm_abs_epi16(a);
+#else
+  return _mm_max_epi16(a, _mm_sub_epi16(_mm_setzero_si128(), a));
+#endif
+}
+
+SIMD_INLINE v128 v128_abs_s8(v128 a) {
+#if defined(__SSSE3__)
+  return _mm_abs_epi8(a);
+#else
+  v128 sign = _mm_cmplt_epi8(a, _mm_setzero_si128());
+  return _mm_xor_si128(sign, _mm_add_epi8(a, sign));
+#endif
+}
+
+SIMD_INLINE v128 v128_ziplo_8(v128 a, v128 b) {
+  return _mm_unpacklo_epi8(b, a);
+}
+
+SIMD_INLINE v128 v128_ziphi_8(v128 a, v128 b) {
+  return _mm_unpackhi_epi8(b, a);
+}
+
+SIMD_INLINE v128 v128_ziplo_16(v128 a, v128 b) {
+  return _mm_unpacklo_epi16(b, a);
+}
+
+SIMD_INLINE v128 v128_ziphi_16(v128 a, v128 b) {
+  return _mm_unpackhi_epi16(b, a);
+}
+
+SIMD_INLINE v128 v128_ziplo_32(v128 a, v128 b) {
+  return _mm_unpacklo_epi32(b, a);
+}
+
+SIMD_INLINE v128 v128_ziphi_32(v128 a, v128 b) {
+  return _mm_unpackhi_epi32(b, a);
+}
+
+SIMD_INLINE v128 v128_ziplo_64(v128 a, v128 b) {
+  return _mm_unpacklo_epi64(b, a);
+}
+
+SIMD_INLINE v128 v128_ziphi_64(v128 a, v128 b) {
+  return _mm_unpackhi_epi64(b, a);
+}
+
+SIMD_INLINE v128 v128_zip_8(v64 a, v64 b) { return _mm_unpacklo_epi8(b, a); }
+
+SIMD_INLINE v128 v128_zip_16(v64 a, v64 b) { return _mm_unpacklo_epi16(b, a); }
+
+SIMD_INLINE v128 v128_zip_32(v64 a, v64 b) { return _mm_unpacklo_epi32(b, a); }
+
+SIMD_INLINE v128 v128_unziphi_8(v128 a, v128 b) {
+  return _mm_packs_epi16(_mm_srai_epi16(b, 8), _mm_srai_epi16(a, 8));
+}
+
+SIMD_INLINE v128 v128_unziplo_8(v128 a, v128 b) {
+#if defined(__SSSE3__)
+#ifdef __x86_64__
+  v128 order = _mm_cvtsi64_si128(0x0e0c0a0806040200LL);
+#else
+  v128 order = _mm_set_epi32(0, 0, 0x0e0c0a08, 0x06040200);
+#endif
+  return _mm_unpacklo_epi64(_mm_shuffle_epi8(b, order),
+                            _mm_shuffle_epi8(a, order));
+#else
+  return v128_unziphi_8(_mm_slli_si128(a, 1), _mm_slli_si128(b, 1));
+#endif
+}
+
+SIMD_INLINE v128 v128_unziphi_16(v128 a, v128 b) {
+  return _mm_packs_epi32(_mm_srai_epi32(b, 16), _mm_srai_epi32(a, 16));
+}
+
+SIMD_INLINE v128 v128_unziplo_16(v128 a, v128 b) {
+#if defined(__SSSE3__)
+#ifdef __x86_64__
+  v128 order = _mm_cvtsi64_si128(0x0d0c090805040100LL);
+#else
+  v128 order = _mm_set_epi32(0, 0, 0x0d0c0908, 0x05040100);
+#endif
+  return _mm_unpacklo_epi64(_mm_shuffle_epi8(b, order),
+                            _mm_shuffle_epi8(a, order));
+#else
+  return v128_unziphi_16(_mm_slli_si128(a, 2), _mm_slli_si128(b, 2));
+#endif
+}
+
+SIMD_INLINE v128 v128_unziphi_32(v128 a, v128 b) {
+  return _mm_castps_si128(_mm_shuffle_ps(
+      _mm_castsi128_ps(b), _mm_castsi128_ps(a), _MM_SHUFFLE(3, 1, 3, 1)));
+}
+
+SIMD_INLINE v128 v128_unziplo_32(v128 a, v128 b) {
+  return _mm_castps_si128(_mm_shuffle_ps(
+      _mm_castsi128_ps(b), _mm_castsi128_ps(a), _MM_SHUFFLE(2, 0, 2, 0)));
+}
+
+SIMD_INLINE v128 v128_unpack_u8_s16(v64 a) {
+  return _mm_unpacklo_epi8(a, _mm_setzero_si128());
+}
+
+SIMD_INLINE v128 v128_unpacklo_u8_s16(v128 a) {
+  return _mm_unpacklo_epi8(a, _mm_setzero_si128());
+}
+
+SIMD_INLINE v128 v128_unpackhi_u8_s16(v128 a) {
+  return _mm_unpackhi_epi8(a, _mm_setzero_si128());
+}
+
+SIMD_INLINE v128 v128_unpack_s8_s16(v64 a) {
+  return _mm_srai_epi16(_mm_unpacklo_epi8(a, a), 8);
+}
+
+SIMD_INLINE v128 v128_unpacklo_s8_s16(v128 a) {
+  return _mm_srai_epi16(_mm_unpacklo_epi8(a, a), 8);
+}
+
+SIMD_INLINE v128 v128_unpackhi_s8_s16(v128 a) {
+  return _mm_srai_epi16(_mm_unpackhi_epi8(a, a), 8);
+}
+
+SIMD_INLINE v128 v128_pack_s32_s16(v128 a, v128 b) {
+  return _mm_packs_epi32(b, a);
+}
+
+SIMD_INLINE v128 v128_pack_s32_u16(v128 a, v128 b) {
+#if defined(__SSE4_1__)
+  return _mm_packus_epi32(b, a);
+#else
+  return v128_from_v64(v64_pack_s32_u16(v128_high_v64(a), v128_low_v64(a)),
+                       v64_pack_s32_u16(v128_high_v64(b), v128_low_v64(b)));
+#endif
+}
+
+SIMD_INLINE v128 v128_pack_s16_u8(v128 a, v128 b) {
+  return _mm_packus_epi16(b, a);
+}
+
+SIMD_INLINE v128 v128_pack_s16_s8(v128 a, v128 b) {
+  return _mm_packs_epi16(b, a);
+}
+
+SIMD_INLINE v128 v128_unpack_u16_s32(v64 a) {
+  return _mm_unpacklo_epi16(a, _mm_setzero_si128());
+}
+
+SIMD_INLINE v128 v128_unpack_s16_s32(v64 a) {
+  return _mm_srai_epi32(_mm_unpacklo_epi16(a, a), 16);
+}
+
+SIMD_INLINE v128 v128_unpacklo_u16_s32(v128 a) {
+  return _mm_unpacklo_epi16(a, _mm_setzero_si128());
+}
+
+SIMD_INLINE v128 v128_unpacklo_s16_s32(v128 a) {
+  return _mm_srai_epi32(_mm_unpacklo_epi16(a, a), 16);
+}
+
+SIMD_INLINE v128 v128_unpackhi_u16_s32(v128 a) {
+  return _mm_unpackhi_epi16(a, _mm_setzero_si128());
+}
+
+SIMD_INLINE v128 v128_unpackhi_s16_s32(v128 a) {
+  return _mm_srai_epi32(_mm_unpackhi_epi16(a, a), 16);
+}
+
+SIMD_INLINE v128 v128_shuffle_8(v128 x, v128 pattern) {
+#if defined(__SSSE3__)
+  return _mm_shuffle_epi8(x, pattern);
+#else
+  v128 output;
+  unsigned char *input = (unsigned char *)&x;
+  unsigned char *index = (unsigned char *)&pattern;
+  char *selected = (char *)&output;
+  int counter;
+
+  for (counter = 0; counter < 16; counter++) {
+    selected[counter] = input[index[counter] & 15];
+  }
+
+  return output;
+#endif
+}
+
+SIMD_INLINE int64_t v128_dotp_su8(v128 a, v128 b) {
+  v128 t1 = _mm_madd_epi16(v128_unpackhi_s8_s16(a), v128_unpackhi_u8_s16(b));
+  v128 t2 = _mm_madd_epi16(v128_unpacklo_s8_s16(a), v128_unpacklo_u8_s16(b));
+  v128 t = v128_add_32(t1, t2);
+  t = v128_add_32(t, _mm_srli_si128(t, 8));
+  t = v128_add_32(t, _mm_srli_si128(t, 4));
+  return (int32_t)v128_low_u32(t);
+}
+
+SIMD_INLINE int64_t v128_dotp_s16(v128 a, v128 b) {
+  v128 r = _mm_madd_epi16(a, b);
+#if defined(__SSE4_1__) && defined(__x86_64__)
+  v128 c = _mm_add_epi64(_mm_cvtepi32_epi64(r),
+                         _mm_cvtepi32_epi64(_mm_srli_si128(r, 8)));
+  return _mm_cvtsi128_si64(_mm_add_epi64(c, _mm_srli_si128(c, 8)));
+#else
+  return (int64_t)_mm_cvtsi128_si32(r) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(r, 4)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(r, 8)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(r, 12));
+#endif
+}
+
+SIMD_INLINE uint64_t v128_hadd_u8(v128 a) {
+  v128 t = _mm_sad_epu8(a, _mm_setzero_si128());
+  return v64_low_u32(v128_low_v64(t)) + v64_low_u32(v128_high_v64(t));
+}
+
+typedef v128 sad128_internal;
+
+SIMD_INLINE sad128_internal v128_sad_u8_init() { return _mm_setzero_si128(); }
+
+/* Implementation dependent return value.  Result must be finalised with
+   v128_sad_sum().
+   The result for more than 32 v128_sad_u8() calls is undefined. */
+SIMD_INLINE sad128_internal v128_sad_u8(sad128_internal s, v128 a, v128 b) {
+  return _mm_add_epi64(s, _mm_sad_epu8(a, b));
+}
+
+SIMD_INLINE uint32_t v128_sad_u8_sum(sad128_internal s) {
+  return v128_low_u32(_mm_add_epi32(s, _mm_unpackhi_epi64(s, s)));
+}
+
+typedef int32_t ssd128_internal;
+
+SIMD_INLINE ssd128_internal v128_ssd_u8_init() { return 0; }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v128_ssd_sum(). */
+SIMD_INLINE ssd128_internal v128_ssd_u8(ssd128_internal s, v128 a, v128 b) {
+  v128 z = _mm_setzero_si128();
+  v128 l = _mm_sub_epi16(_mm_unpacklo_epi8(a, z), _mm_unpacklo_epi8(b, z));
+  v128 h = _mm_sub_epi16(_mm_unpackhi_epi8(a, z), _mm_unpackhi_epi8(b, z));
+  v128 rl = _mm_madd_epi16(l, l);
+  v128 rh = _mm_madd_epi16(h, h);
+  v128 r = _mm_add_epi32(rl, rh);
+  r = _mm_add_epi32(r, _mm_srli_si128(r, 8));
+  r = _mm_add_epi32(r, _mm_srli_si128(r, 4));
+  return s + _mm_cvtsi128_si32(r);
+}
+
+SIMD_INLINE int32_t v128_ssd_u8_sum(ssd128_internal s) { return s; }
+
+SIMD_INLINE v128 v128_or(v128 a, v128 b) { return _mm_or_si128(a, b); }
+
+SIMD_INLINE v128 v128_xor(v128 a, v128 b) { return _mm_xor_si128(a, b); }
+
+SIMD_INLINE v128 v128_and(v128 a, v128 b) { return _mm_and_si128(a, b); }
+
+SIMD_INLINE v128 v128_andn(v128 a, v128 b) { return _mm_andnot_si128(b, a); }
+
+SIMD_INLINE v128 v128_mul_s16(v64 a, v64 b) {
+  v64 lo_bits = v64_mullo_s16(a, b);
+  v64 hi_bits = v64_mulhi_s16(a, b);
+  return v128_from_v64(v64_ziphi_16(hi_bits, lo_bits),
+                       v64_ziplo_16(hi_bits, lo_bits));
+}
+
+SIMD_INLINE v128 v128_mullo_s16(v128 a, v128 b) {
+  return _mm_mullo_epi16(a, b);
+}
+
+SIMD_INLINE v128 v128_mulhi_s16(v128 a, v128 b) {
+  return _mm_mulhi_epi16(a, b);
+}
+
+SIMD_INLINE v128 v128_mullo_s32(v128 a, v128 b) {
+#if defined(__SSE4_1__)
+  return _mm_mullo_epi32(a, b);
+#else
+  return _mm_unpacklo_epi32(
+      _mm_shuffle_epi32(_mm_mul_epu32(a, b), 8),
+      _mm_shuffle_epi32(
+          _mm_mul_epu32(_mm_srli_si128(a, 4), _mm_srli_si128(b, 4)), 8));
+#endif
+}
+
+SIMD_INLINE int64_t v128_dotp_s32(v128 a, v128 b) {
+  v128 r = v128_mullo_s32(a, b);
+  return (int64_t)_mm_cvtsi128_si32(r) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(r, 4)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(r, 8)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(r, 12));
+}
+
+SIMD_INLINE v128 v128_madd_s16(v128 a, v128 b) { return _mm_madd_epi16(a, b); }
+
+SIMD_INLINE v128 v128_madd_us8(v128 a, v128 b) {
+#if defined(__SSSE3__)
+  return _mm_maddubs_epi16(a, b);
+#else
+  return _mm_packs_epi32(
+      _mm_madd_epi16(_mm_unpacklo_epi8(a, _mm_setzero_si128()),
+                     _mm_srai_epi16(_mm_unpacklo_epi8(b, b), 8)),
+      _mm_madd_epi16(_mm_unpackhi_epi8(a, _mm_setzero_si128()),
+                     _mm_srai_epi16(_mm_unpackhi_epi8(b, b), 8)));
+#endif
+}
+
+SIMD_INLINE v128 v128_padd_u8(v128 a) {
+  return v128_madd_us8(a, _mm_set1_epi8(1));
+}
+
+SIMD_INLINE v128 v128_avg_u8(v128 a, v128 b) { return _mm_avg_epu8(a, b); }
+
+SIMD_INLINE v128 v128_rdavg_u8(v128 a, v128 b) {
+  return _mm_sub_epi8(_mm_avg_epu8(a, b),
+                      _mm_and_si128(_mm_xor_si128(a, b), v128_dup_8(1)));
+}
+
+SIMD_INLINE v128 v128_rdavg_u16(v128 a, v128 b) {
+  return _mm_sub_epi16(_mm_avg_epu16(a, b),
+                       _mm_and_si128(_mm_xor_si128(a, b), v128_dup_16(1)));
+}
+
+SIMD_INLINE v128 v128_avg_u16(v128 a, v128 b) { return _mm_avg_epu16(a, b); }
+
+SIMD_INLINE v128 v128_min_u8(v128 a, v128 b) { return _mm_min_epu8(a, b); }
+
+SIMD_INLINE v128 v128_max_u8(v128 a, v128 b) { return _mm_max_epu8(a, b); }
+
+SIMD_INLINE v128 v128_min_s8(v128 a, v128 b) {
+#if defined(__SSE4_1__)
+  return _mm_min_epi8(a, b);
+#else
+  v128 mask = _mm_cmplt_epi8(a, b);
+  return _mm_or_si128(_mm_andnot_si128(mask, b), _mm_and_si128(mask, a));
+#endif
+}
+
+SIMD_INLINE uint32_t v128_movemask_8(v128 a) { return _mm_movemask_epi8(a); }
+
+SIMD_INLINE v128 v128_blend_8(v128 a, v128 b, v128 c) {
+#if defined(__SSE4_1__)
+  return _mm_blendv_epi8(a, b, c);
+#else
+  c = _mm_cmplt_epi8(c, v128_zero());
+  return v128_or(v128_and(b, c), v128_andn(a, c));
+#endif
+}
+
+SIMD_INLINE v128 v128_max_s8(v128 a, v128 b) {
+#if defined(__SSE4_1__)
+  return _mm_max_epi8(a, b);
+#else
+  v128 mask = _mm_cmplt_epi8(b, a);
+  return _mm_or_si128(_mm_andnot_si128(mask, b), _mm_and_si128(mask, a));
+#endif
+}
+
+SIMD_INLINE v128 v128_min_s16(v128 a, v128 b) { return _mm_min_epi16(a, b); }
+
+SIMD_INLINE v128 v128_max_s16(v128 a, v128 b) { return _mm_max_epi16(a, b); }
+
+SIMD_INLINE v128 v128_min_s32(v128 a, v128 b) {
+#if defined(__SSE4_1__)
+  return _mm_min_epi32(a, b);
+#else
+  v128 mask = _mm_cmplt_epi32(a, b);
+  return _mm_or_si128(_mm_andnot_si128(mask, b), _mm_and_si128(mask, a));
+#endif
+}
+
+SIMD_INLINE v128 v128_max_s32(v128 a, v128 b) {
+#if defined(__SSE4_1__)
+  return _mm_max_epi32(a, b);
+#else
+  v128 mask = _mm_cmplt_epi32(b, a);
+  return _mm_or_si128(_mm_andnot_si128(mask, b), _mm_and_si128(mask, a));
+#endif
+}
+
+SIMD_INLINE v128 v128_cmpgt_s8(v128 a, v128 b) { return _mm_cmpgt_epi8(a, b); }
+
+SIMD_INLINE v128 v128_cmplt_s8(v128 a, v128 b) { return _mm_cmplt_epi8(a, b); }
+
+SIMD_INLINE v128 v128_cmpeq_8(v128 a, v128 b) { return _mm_cmpeq_epi8(a, b); }
+
+SIMD_INLINE v128 v128_cmpgt_s16(v128 a, v128 b) {
+  return _mm_cmpgt_epi16(a, b);
+}
+
+SIMD_INLINE v128 v128_cmplt_s16(v128 a, v128 b) {
+  return _mm_cmplt_epi16(a, b);
+}
+
+SIMD_INLINE v128 v128_cmpeq_32(v128 a, v128 b) { return _mm_cmpeq_epi32(a, b); }
+
+SIMD_INLINE v128 v128_cmpgt_s32(v128 a, v128 b) {
+  return _mm_cmpgt_epi32(a, b);
+}
+
+SIMD_INLINE v128 v128_cmplt_s32(v128 a, v128 b) {
+  return _mm_cmplt_epi32(a, b);
+}
+
+SIMD_INLINE v128 v128_cmpeq_16(v128 a, v128 b) { return _mm_cmpeq_epi16(a, b); }
+
+SIMD_INLINE v128 v128_shl_8(v128 a, unsigned int c) {
+  return _mm_and_si128(_mm_set1_epi8((uint8_t)(0xff << c)),
+                       _mm_sll_epi16(a, _mm_cvtsi32_si128(c)));
+}
+
+SIMD_INLINE v128 v128_shr_u8(v128 a, unsigned int c) {
+  return _mm_and_si128(_mm_set1_epi8(0xff >> c),
+                       _mm_srl_epi16(a, _mm_cvtsi32_si128(c)));
+}
+
+SIMD_INLINE v128 v128_shr_s8(v128 a, unsigned int c) {
+  __m128i x = _mm_cvtsi32_si128(c + 8);
+  return _mm_packs_epi16(_mm_sra_epi16(_mm_unpacklo_epi8(a, a), x),
+                         _mm_sra_epi16(_mm_unpackhi_epi8(a, a), x));
+}
+
+SIMD_INLINE v128 v128_shl_16(v128 a, unsigned int c) {
+  return _mm_sll_epi16(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v128 v128_shr_u16(v128 a, unsigned int c) {
+  return _mm_srl_epi16(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v128 v128_shr_s16(v128 a, unsigned int c) {
+  return _mm_sra_epi16(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v128 v128_shl_32(v128 a, unsigned int c) {
+  return _mm_sll_epi32(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v128 v128_shr_u32(v128 a, unsigned int c) {
+  return _mm_srl_epi32(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v128 v128_shr_s32(v128 a, unsigned int c) {
+  return _mm_sra_epi32(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v128 v128_shl_64(v128 a, unsigned int c) {
+  return _mm_sll_epi64(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v128 v128_shr_u64(v128 a, unsigned int c) {
+  return _mm_srl_epi64(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v128 v128_shr_s64(v128 a, unsigned int c) {
+  // _mm_sra_epi64 is missing in gcc?
+  return v128_from_64((int64_t)v64_u64(v128_high_v64(a)) >> c,
+                      (int64_t)v64_u64(v128_low_v64(a)) >> c);
+  // return _mm_sra_epi64(a, _mm_cvtsi32_si128(c));
+}
+
+/* These intrinsics require immediate values, so we must use #defines
+   to enforce that. */
+#define v128_shl_n_byte(a, c) _mm_slli_si128(a, (c)&127)
+#define v128_shr_n_byte(a, c) _mm_srli_si128(a, (c)&127)
+#define v128_shl_n_8(a, c) \
+  _mm_and_si128(_mm_set1_epi8((uint8_t)(0xff << (c))), _mm_slli_epi16(a, c))
+#define v128_shr_n_u8(a, c) \
+  _mm_and_si128(_mm_set1_epi8(0xff >> (c)), _mm_srli_epi16(a, c))
+#define v128_shr_n_s8(a, c)                                         \
+  _mm_packs_epi16(_mm_srai_epi16(_mm_unpacklo_epi8(a, a), (c) + 8), \
+                  _mm_srai_epi16(_mm_unpackhi_epi8(a, a), (c) + 8))
+#define v128_shl_n_16(a, c) _mm_slli_epi16(a, c)
+#define v128_shr_n_u16(a, c) _mm_srli_epi16(a, c)
+#define v128_shr_n_s16(a, c) _mm_srai_epi16(a, c)
+#define v128_shl_n_32(a, c) _mm_slli_epi32(a, c)
+#define v128_shr_n_u32(a, c) _mm_srli_epi32(a, c)
+#define v128_shr_n_s32(a, c) _mm_srai_epi32(a, c)
+#define v128_shl_n_64(a, c) _mm_slli_epi64(a, c)
+#define v128_shr_n_u64(a, c) _mm_srli_epi64(a, c)
+#define v128_shr_n_s64(a, c) \
+  v128_shr_s64(a, c)  // _mm_srai_epi64 missing in gcc?
+
+typedef v128 sad128_internal_u16;
+
+SIMD_INLINE sad128_internal_u16 v128_sad_u16_init() { return v128_zero(); }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v128_sad_u16_sum(). */
+SIMD_INLINE sad128_internal_u16 v128_sad_u16(sad128_internal_u16 s, v128 a,
+                                             v128 b) {
+#if defined(__SSE4_1__)
+  v128 t = v128_sub_16(_mm_max_epu16(a, b), _mm_min_epu16(a, b));
+#else
+  v128 t = v128_cmplt_s16(v128_xor(a, v128_dup_16(32768)),
+                          v128_xor(b, v128_dup_16(32768)));
+  t = v128_sub_16(v128_or(v128_and(b, t), v128_andn(a, t)),
+                  v128_or(v128_and(a, t), v128_andn(b, t)));
+#endif
+  return v128_add_32(
+      s, v128_add_32(v128_unpackhi_u16_s32(t), v128_unpacklo_u16_s32(t)));
+}
+
+SIMD_INLINE uint32_t v128_sad_u16_sum(sad128_internal_u16 s) {
+  return v128_low_u32(s) + v128_low_u32(v128_shr_n_byte(s, 4)) +
+         v128_low_u32(v128_shr_n_byte(s, 8)) +
+         v128_low_u32(v128_shr_n_byte(s, 12));
+}
+
+typedef v128 ssd128_internal_s16;
+
+SIMD_INLINE ssd128_internal_s16 v128_ssd_s16_init() { return v128_zero(); }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v128_ssd_s16_sum(). */
+SIMD_INLINE ssd128_internal_s16 v128_ssd_s16(ssd128_internal_s16 s, v128 a,
+                                             v128 b) {
+  v128 d = v128_sub_16(a, b);
+  d = v128_madd_s16(d, d);
+  return v128_add_64(s, v128_add_64(_mm_unpackhi_epi32(d, v128_zero()),
+                                    _mm_unpacklo_epi32(d, v128_zero())));
+}
+
+SIMD_INLINE uint64_t v128_ssd_s16_sum(ssd128_internal_s16 s) {
+  return v64_u64(v128_low_v64(s)) + v64_u64(v128_high_v64(s));
+}
+
+#endif  // AOM_AOM_DSP_SIMD_V128_INTRINSICS_X86_H_
diff --git a/third_party/aom/aom_dsp/simd/v256_intrinsics.h b/third_party/aom/aom_dsp/simd/v256_intrinsics.h
new file mode 100644
index 0000000000..cb99d35b71
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v256_intrinsics.h
@@ -0,0 +1,376 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V256_INTRINSICS_H_
+#define AOM_AOM_DSP_SIMD_V256_INTRINSICS_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "aom_dsp/simd/v256_intrinsics_c.h"
+#include "aom_dsp/simd/v128_intrinsics.h"
+#include "aom_dsp/simd/v64_intrinsics.h"
+
+/* Fallback to plain, unoptimised C. */
+
+typedef c_v256 v256;
+
+SIMD_INLINE uint32_t v256_low_u32(v256 a) { return c_v256_low_u32(a); }
+SIMD_INLINE v64 v256_low_v64(v256 a) { return c_v256_low_v64(a); }
+SIMD_INLINE uint64_t v256_low_u64(v256 a) { return c_v256_low_u64(a); }
+SIMD_INLINE v128 v256_low_v128(v256 a) { return c_v256_low_v128(a); }
+SIMD_INLINE v128 v256_high_v128(v256 a) { return c_v256_high_v128(a); }
+SIMD_INLINE v256 v256_from_v128(v128 hi, v128 lo) {
+  return c_v256_from_v128(hi, lo);
+}
+SIMD_INLINE v256 v256_from_64(uint64_t a, uint64_t b, uint64_t c, uint64_t d) {
+  return c_v256_from_64(a, b, c, d);
+}
+SIMD_INLINE v256 v256_from_v64(v64 a, v64 b, v64 c, v64 d) {
+  return c_v256_from_v64(a, b, c, d);
+}
+
+SIMD_INLINE v256 v256_load_unaligned(const void *p) {
+  return c_v256_load_unaligned(p);
+}
+SIMD_INLINE v256 v256_load_aligned(const void *p) {
+  return c_v256_load_aligned(p);
+}
+
+SIMD_INLINE void v256_store_unaligned(void *p, v256 a) {
+  c_v256_store_unaligned(p, a);
+}
+SIMD_INLINE void v256_store_aligned(void *p, v256 a) {
+  c_v256_store_aligned(p, a);
+}
+
+SIMD_INLINE v256 v256_align(v256 a, v256 b, unsigned int c) {
+  return c_v256_align(a, b, c);
+}
+
+SIMD_INLINE v256 v256_zero() { return c_v256_zero(); }
+SIMD_INLINE v256 v256_dup_8(uint8_t x) { return c_v256_dup_8(x); }
+SIMD_INLINE v256 v256_dup_16(uint16_t x) { return c_v256_dup_16(x); }
+SIMD_INLINE v256 v256_dup_32(uint32_t x) { return c_v256_dup_32(x); }
+SIMD_INLINE v256 v256_dup_64(uint64_t x) { return c_v256_dup_64(x); }
+
+typedef uint32_t sad256_internal;
+SIMD_INLINE sad256_internal v256_sad_u8_init() { return c_v256_sad_u8_init(); }
+SIMD_INLINE sad256_internal v256_sad_u8(sad256_internal s, v256 a, v256 b) {
+  return c_v256_sad_u8(s, a, b);
+}
+SIMD_INLINE uint32_t v256_sad_u8_sum(sad256_internal s) {
+  return c_v256_sad_u8_sum(s);
+}
+typedef uint32_t ssd256_internal;
+SIMD_INLINE ssd256_internal v256_ssd_u8_init() { return c_v256_ssd_u8_init(); }
+SIMD_INLINE ssd256_internal v256_ssd_u8(ssd256_internal s, v256 a, v256 b) {
+  return c_v256_ssd_u8(s, a, b);
+}
+SIMD_INLINE uint32_t v256_ssd_u8_sum(ssd256_internal s) {
+  return c_v256_ssd_u8_sum(s);
+}
+
+SIMD_INLINE int64_t v256_dotp_su8(v256 a, v256 b) {
+  return c_v256_dotp_su8(a, b);
+}
+SIMD_INLINE int64_t v256_dotp_s16(v256 a, v256 b) {
+  return c_v256_dotp_s16(a, b);
+}
+SIMD_INLINE int64_t v256_dotp_s32(v256 a, v256 b) {
+  return c_v256_dotp_s32(a, b);
+}
+SIMD_INLINE uint64_t v256_hadd_u8(v256 a) { return c_v256_hadd_u8(a); }
+
+SIMD_INLINE v256 v256_or(v256 a, v256 b) { return c_v256_or(a, b); }
+SIMD_INLINE v256 v256_xor(v256 a, v256 b) { return c_v256_xor(a, b); }
+SIMD_INLINE v256 v256_and(v256 a, v256 b) { return c_v256_and(a, b); }
+SIMD_INLINE v256 v256_andn(v256 a, v256 b) { return c_v256_andn(a, b); }
+
+SIMD_INLINE v256 v256_add_8(v256 a, v256 b) { return c_v256_add_8(a, b); }
+SIMD_INLINE v256 v256_add_16(v256 a, v256 b) { return c_v256_add_16(a, b); }
+SIMD_INLINE v256 v256_sadd_s8(v256 a, v256 b) { return c_v256_sadd_s8(a, b); }
+SIMD_INLINE v256 v256_sadd_u8(v256 a, v256 b) { return c_v256_sadd_u8(a, b); }
+SIMD_INLINE v256 v256_sadd_s16(v256 a, v256 b) { return c_v256_sadd_s16(a, b); }
+SIMD_INLINE v256 v256_add_32(v256 a, v256 b) { return c_v256_add_32(a, b); }
+SIMD_INLINE v256 v256_add_64(v256 a, v256 b) { return c_v256_add_64(a, b); }
+SIMD_INLINE v256 v256_sub_64(v256 a, v256 b) { return c_v256_sub_64(a, b); }
+SIMD_INLINE v256 v256_padd_u8(v256 a) { return c_v256_padd_u8(a); }
+SIMD_INLINE v256 v256_padd_s16(v256 a) { return c_v256_padd_s16(a); }
+SIMD_INLINE v256 v256_sub_8(v256 a, v256 b) { return c_v256_sub_8(a, b); }
+SIMD_INLINE v256 v256_ssub_u8(v256 a, v256 b) { return c_v256_ssub_u8(a, b); }
+SIMD_INLINE v256 v256_ssub_s8(v256 a, v256 b) { return c_v256_ssub_s8(a, b); }
+SIMD_INLINE v256 v256_sub_16(v256 a, v256 b) { return c_v256_sub_16(a, b); }
+SIMD_INLINE v256 v256_ssub_s16(v256 a, v256 b) { return c_v256_ssub_s16(a, b); }
+SIMD_INLINE v256 v256_ssub_u16(v256 a, v256 b) { return c_v256_ssub_u16(a, b); }
+SIMD_INLINE v256 v256_sub_32(v256 a, v256 b) { return c_v256_sub_32(a, b); }
+SIMD_INLINE v256 v256_abs_s16(v256 a) { return c_v256_abs_s16(a); }
+SIMD_INLINE v256 v256_abs_s8(v256 a) { return c_v256_abs_s8(a); }
+
+SIMD_INLINE v256 v256_mul_s16(v128 a, v128 b) { return c_v256_mul_s16(a, b); }
+SIMD_INLINE v256 v256_mullo_s16(v256 a, v256 b) {
+  return c_v256_mullo_s16(a, b);
+}
+SIMD_INLINE v256 v256_mulhi_s16(v256 a, v256 b) {
+  return c_v256_mulhi_s16(a, b);
+}
+SIMD_INLINE v256 v256_mullo_s32(v256 a, v256 b) {
+  return c_v256_mullo_s32(a, b);
+}
+SIMD_INLINE v256 v256_madd_s16(v256 a, v256 b) { return c_v256_madd_s16(a, b); }
+SIMD_INLINE v256 v256_madd_us8(v256 a, v256 b) { return c_v256_madd_us8(a, b); }
+
+SIMD_INLINE uint32_t v256_movemask_8(v256 a) { return c_v256_movemask_8(a); }
+SIMD_INLINE v256 v256_blend_8(v256 a, v256 b, v256 c) {
+  return c_v256_blend_8(a, b, c);
+}
+
+SIMD_INLINE v256 v256_avg_u8(v256 a, v256 b) { return c_v256_avg_u8(a, b); }
+SIMD_INLINE v256 v256_rdavg_u8(v256 a, v256 b) { return c_v256_rdavg_u8(a, b); }
+SIMD_INLINE v256 v256_rdavg_u16(v256 a, v256 b) {
+  return c_v256_rdavg_u16(a, b);
+}
+SIMD_INLINE v256 v256_avg_u16(v256 a, v256 b) { return c_v256_avg_u16(a, b); }
+SIMD_INLINE v256 v256_min_u8(v256 a, v256 b) { return c_v256_min_u8(a, b); }
+SIMD_INLINE v256 v256_max_u8(v256 a, v256 b) { return c_v256_max_u8(a, b); }
+SIMD_INLINE v256 v256_min_s8(v256 a, v256 b) { return c_v256_min_s8(a, b); }
+SIMD_INLINE v256 v256_max_s8(v256 a, v256 b) { return c_v256_max_s8(a, b); }
+SIMD_INLINE v256 v256_min_s16(v256 a, v256 b) { return c_v256_min_s16(a, b); }
+SIMD_INLINE v256 v256_max_s16(v256 a, v256 b) { return c_v256_max_s16(a, b); }
+SIMD_INLINE v256 v256_min_s32(v256 a, v256 b) { return c_v256_min_s32(a, b); }
+SIMD_INLINE v256 v256_max_s32(v256 a, v256 b) { return c_v256_max_s32(a, b); }
+
+SIMD_INLINE v256 v256_ziplo_8(v256 a, v256 b) { return c_v256_ziplo_8(a, b); }
+SIMD_INLINE v256 v256_ziphi_8(v256 a, v256 b) { return c_v256_ziphi_8(a, b); }
+SIMD_INLINE v256 v256_ziplo_16(v256 a, v256 b) { return c_v256_ziplo_16(a, b); }
+SIMD_INLINE v256 v256_ziphi_16(v256 a, v256 b) { return c_v256_ziphi_16(a, b); }
+SIMD_INLINE v256 v256_ziplo_32(v256 a, v256 b) { return c_v256_ziplo_32(a, b); }
+SIMD_INLINE v256 v256_ziphi_32(v256 a, v256 b) { return c_v256_ziphi_32(a, b); }
+SIMD_INLINE v256 v256_ziplo_64(v256 a, v256 b) { return c_v256_ziplo_64(a, b); }
+SIMD_INLINE v256 v256_ziphi_64(v256 a, v256 b) { return c_v256_ziphi_64(a, b); }
+SIMD_INLINE v256 v256_ziplo_128(v256 a, v256 b) {
+  return c_v256_ziplo_128(a, b);
+}
+SIMD_INLINE v256 v256_ziphi_128(v256 a, v256 b) {
+  return c_v256_ziphi_128(a, b);
+}
+SIMD_INLINE v256 v256_zip_8(v128 a, v128 b) { return c_v256_zip_8(a, b); }
+SIMD_INLINE v256 v256_zip_16(v128 a, v128 b) { return c_v256_zip_16(a, b); }
+SIMD_INLINE v256 v256_zip_32(v128 a, v128 b) { return c_v256_zip_32(a, b); }
+SIMD_INLINE v256 v256_unziplo_8(v256 a, v256 b) {
+  return c_v256_unziplo_8(a, b);
+}
+SIMD_INLINE v256 v256_unziphi_8(v256 a, v256 b) {
+  return c_v256_unziphi_8(a, b);
+}
+SIMD_INLINE v256 v256_unziplo_16(v256 a, v256 b) {
+  return c_v256_unziplo_16(a, b);
+}
+SIMD_INLINE v256 v256_unziphi_16(v256 a, v256 b) {
+  return c_v256_unziphi_16(a, b);
+}
+SIMD_INLINE v256 v256_unziplo_32(v256 a, v256 b) {
+  return c_v256_unziplo_32(a, b);
+}
+SIMD_INLINE v256 v256_unziphi_32(v256 a, v256 b) {
+  return c_v256_unziphi_32(a, b);
+}
+SIMD_INLINE v256 v256_unziplo_64(v256 a, v256 b) {
+  return c_v256_unziplo_64(a, b);
+}
+SIMD_INLINE v256 v256_unziphi_64(v256 a, v256 b) {
+  return c_v256_unziphi_64(a, b);
+}
+SIMD_INLINE v256 v256_unpack_u8_s16(v128 a) { return c_v256_unpack_u8_s16(a); }
+SIMD_INLINE v256 v256_unpacklo_u8_s16(v256 a) {
+  return c_v256_unpacklo_u8_s16(a);
+}
+SIMD_INLINE v256 v256_unpackhi_u8_s16(v256 a) {
+  return c_v256_unpackhi_u8_s16(a);
+}
+SIMD_INLINE v256 v256_unpack_s8_s16(v128 a) { return c_v256_unpack_s8_s16(a); }
+SIMD_INLINE v256 v256_unpacklo_s8_s16(v256 a) {
+  return c_v256_unpacklo_s8_s16(a);
+}
+SIMD_INLINE v256 v256_unpackhi_s8_s16(v256 a) {
+  return c_v256_unpackhi_s8_s16(a);
+}
+SIMD_INLINE v256 v256_pack_s32_s16(v256 a, v256 b) {
+  return c_v256_pack_s32_s16(a, b);
+}
+SIMD_INLINE v256 v256_pack_s32_u16(v256 a, v256 b) {
+  return c_v256_pack_s32_u16(a, b);
+}
+SIMD_INLINE v256 v256_pack_s16_u8(v256 a, v256 b) {
+  return c_v256_pack_s16_u8(a, b);
+}
+SIMD_INLINE v256 v256_pack_s16_s8(v256 a, v256 b) {
+  return c_v256_pack_s16_s8(a, b);
+}
+SIMD_INLINE v256 v256_unpack_u16_s32(v128 a) {
+  return c_v256_unpack_u16_s32(a);
+}
+SIMD_INLINE v256 v256_unpack_s16_s32(v128 a) {
+  return c_v256_unpack_s16_s32(a);
+}
+SIMD_INLINE v256 v256_unpacklo_u16_s32(v256 a) {
+  return c_v256_unpacklo_u16_s32(a);
+}
+SIMD_INLINE v256 v256_unpacklo_s16_s32(v256 a) {
+  return c_v256_unpacklo_s16_s32(a);
+}
+SIMD_INLINE v256 v256_unpackhi_u16_s32(v256 a) {
+  return c_v256_unpackhi_u16_s32(a);
+}
+SIMD_INLINE v256 v256_unpackhi_s16_s32(v256 a) {
+  return c_v256_unpackhi_s16_s32(a);
+}
+SIMD_INLINE v256 v256_shuffle_8(v256 a, v256 pattern) {
+  return c_v256_shuffle_8(a, pattern);
+}
+SIMD_INLINE v256 v256_wideshuffle_8(v256 a, v256 b, v256 pattern) {
+  return c_v256_wideshuffle_8(a, b, pattern);
+}
+SIMD_INLINE v256 v256_pshuffle_8(v256 a, v256 pattern) {
+  return c_v256_pshuffle_8(a, pattern);
+}
+
+SIMD_INLINE v256 v256_cmpgt_s8(v256 a, v256 b) { return c_v256_cmpgt_s8(a, b); }
+SIMD_INLINE v256 v256_cmplt_s8(v256 a, v256 b) { return c_v256_cmplt_s8(a, b); }
+SIMD_INLINE v256 v256_cmpeq_8(v256 a, v256 b) { return c_v256_cmpeq_8(a, b); }
+SIMD_INLINE v256 v256_cmpgt_s16(v256 a, v256 b) {
+  return c_v256_cmpgt_s16(a, b);
+}
+SIMD_INLINE v256 v256_cmplt_s16(v256 a, v256 b) {
+  return c_v256_cmplt_s16(a, b);
+}
+SIMD_INLINE v256 v256_cmpeq_16(v256 a, v256 b) { return c_v256_cmpeq_16(a, b); }
+SIMD_INLINE v256 v256_cmpeq_32(v256 a, v256 b) { return c_v256_cmpeq_32(a, b); }
+
+SIMD_INLINE v256 v256_cmpgt_s32(v256 a, v256 b) {
+  return c_v256_cmpgt_s32(a, b);
+}
+SIMD_INLINE v256 v256_cmplt_s32(v256 a, v256 b) {
+  return c_v256_cmplt_s32(a, b);
+}
+SIMD_INLINE v256 v256_shl_8(v256 a, unsigned int c) {
+  return c_v256_shl_8(a, c);
+}
+SIMD_INLINE v256 v256_shr_u8(v256 a, unsigned int c) {
+  return c_v256_shr_u8(a, c);
+}
+SIMD_INLINE v256 v256_shr_s8(v256 a, unsigned int c) {
+  return c_v256_shr_s8(a, c);
+}
+SIMD_INLINE v256 v256_shl_16(v256 a, unsigned int c) {
+  return c_v256_shl_16(a, c);
+}
+SIMD_INLINE v256 v256_shr_u16(v256 a, unsigned int c) {
+  return c_v256_shr_u16(a, c);
+}
+SIMD_INLINE v256 v256_shr_s16(v256 a, unsigned int c) {
+  return c_v256_shr_s16(a, c);
+}
+SIMD_INLINE v256 v256_shl_32(v256 a, unsigned int c) {
+  return c_v256_shl_32(a, c);
+}
+SIMD_INLINE v256 v256_shr_u32(v256 a, unsigned int c) {
+  return c_v256_shr_u32(a, c);
+}
+SIMD_INLINE v256 v256_shr_s32(v256 a, unsigned int c) {
+  return c_v256_shr_s32(a, c);
+}
+SIMD_INLINE v256 v256_shl_64(v256 a, unsigned int c) {
+  return c_v256_shl_64(a, c);
+}
+SIMD_INLINE v256 v256_shr_u64(v256 a, unsigned int c) {
+  return c_v256_shr_u64(a, c);
+}
+SIMD_INLINE v256 v256_shr_s64(v256 a, unsigned int c) {
+  return c_v256_shr_s64(a, c);
+}
+
+SIMD_INLINE v256 v256_shr_n_byte(v256 a, unsigned int n) {
+  return c_v256_shr_n_byte(a, n);
+}
+SIMD_INLINE v256 v256_shl_n_byte(v256 a, unsigned int n) {
+  return c_v256_shl_n_byte(a, n);
+}
+SIMD_INLINE v256 v256_shl_n_8(v256 a, unsigned int n) {
+  return c_v256_shl_n_8(a, n);
+}
+SIMD_INLINE v256 v256_shl_n_16(v256 a, unsigned int n) {
+  return c_v256_shl_n_16(a, n);
+}
+SIMD_INLINE v256 v256_shl_n_32(v256 a, unsigned int n) {
+  return c_v256_shl_n_32(a, n);
+}
+SIMD_INLINE v256 v256_shl_n_64(v256 a, unsigned int n) {
+  return c_v256_shl_n_64(a, n);
+}
+SIMD_INLINE v256 v256_shr_n_u8(v256 a, unsigned int n) {
+  return c_v256_shr_n_u8(a, n);
+}
+SIMD_INLINE v256 v256_shr_n_u16(v256 a, unsigned int n) {
+  return c_v256_shr_n_u16(a, n);
+}
+SIMD_INLINE v256 v256_shr_n_u32(v256 a, unsigned int n) {
+  return c_v256_shr_n_u32(a, n);
+}
+SIMD_INLINE v256 v256_shr_n_u64(v256 a, unsigned int n) {
+  return c_v256_shr_n_u64(a, n);
+}
+SIMD_INLINE v256 v256_shr_n_s8(v256 a, unsigned int n) {
+  return c_v256_shr_n_s8(a, n);
+}
+SIMD_INLINE v256 v256_shr_n_s16(v256 a, unsigned int n) {
+  return c_v256_shr_n_s16(a, n);
+}
+SIMD_INLINE v256 v256_shr_n_s32(v256 a, unsigned int n) {
+  return c_v256_shr_n_s32(a, n);
+}
+SIMD_INLINE v256 v256_shr_n_s64(v256 a, unsigned int n) {
+  return c_v256_shr_n_s64(a, n);
+}
+
+SIMD_INLINE v256 v256_shr_n_word(v256 a, unsigned int n) {
+  return c_v256_shr_n_word(a, n);
+}
+SIMD_INLINE v256 v256_shl_n_word(v256 a, unsigned int n) {
+  return c_v256_shl_n_word(a, n);
+}
+
+typedef uint32_t sad256_internal_u16;
+SIMD_INLINE sad256_internal_u16 v256_sad_u16_init() {
+  return c_v256_sad_u16_init();
+}
+SIMD_INLINE sad256_internal_u16 v256_sad_u16(sad256_internal_u16 s, v256 a,
+                                             v256 b) {
+  return c_v256_sad_u16(s, a, b);
+}
+SIMD_INLINE uint32_t v256_sad_u16_sum(sad256_internal_u16 s) {
+  return c_v256_sad_u16_sum(s);
+}
+
+typedef uint64_t ssd256_internal_s16;
+SIMD_INLINE ssd256_internal_s16 v256_ssd_s16_init() {
+  return c_v256_ssd_s16_init();
+}
+SIMD_INLINE ssd256_internal_s16 v256_ssd_s16(ssd256_internal_s16 s, v256 a,
+                                             v256 b) {
+  return c_v256_ssd_s16(s, a, b);
+}
+SIMD_INLINE uint64_t v256_ssd_s16_sum(ssd256_internal_s16 s) {
+  return c_v256_ssd_s16_sum(s);
+}
+
+#endif  // AOM_AOM_DSP_SIMD_V256_INTRINSICS_H_
diff --git a/third_party/aom/aom_dsp/simd/v256_intrinsics_arm.h b/third_party/aom/aom_dsp/simd/v256_intrinsics_arm.h
new file mode 100644
index 0000000000..bd86ea1721
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v256_intrinsics_arm.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V256_INTRINSICS_ARM_H_
+#define AOM_AOM_DSP_SIMD_V256_INTRINSICS_ARM_H_
+
+#include "aom_dsp/simd/v256_intrinsics_v128.h"
+
+#endif  // AOM_AOM_DSP_SIMD_V256_INTRINSICS_ARM_H_
diff --git a/third_party/aom/aom_dsp/simd/v256_intrinsics_c.h b/third_party/aom/aom_dsp/simd/v256_intrinsics_c.h
new file mode 100644
index 0000000000..a1c08e95ad
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v256_intrinsics_c.h
@@ -0,0 +1,953 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V256_INTRINSICS_C_H_
+#define AOM_AOM_DSP_SIMD_V256_INTRINSICS_C_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "config/aom_config.h"
+
+#include "aom_dsp/simd/v128_intrinsics_c.h"
+
+typedef union {
+  uint8_t u8[32];
+  uint16_t u16[16];
+  uint32_t u32[8];
+  uint64_t u64[4];
+  int8_t s8[32];
+  int16_t s16[16];
+  int32_t s32[8];
+  int64_t s64[4];
+  c_v64 v64[4];
+  c_v128 v128[2];
+} c_v256;
+
+SIMD_INLINE uint32_t c_v256_low_u32(c_v256 a) { return a.u32[0]; }
+
+SIMD_INLINE c_v64 c_v256_low_v64(c_v256 a) { return a.v64[0]; }
+
+SIMD_INLINE uint64_t c_v256_low_u64(c_v256 a) { return a.u64[0]; }
+
+SIMD_INLINE c_v128 c_v256_low_v128(c_v256 a) { return a.v128[0]; }
+
+SIMD_INLINE c_v128 c_v256_high_v128(c_v256 a) { return a.v128[1]; }
+
+SIMD_INLINE c_v256 c_v256_from_v128(c_v128 hi, c_v128 lo) {
+  c_v256 t;
+  t.v128[1] = hi;
+  t.v128[0] = lo;
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_from_64(uint64_t a, uint64_t b, uint64_t c,
+                                  uint64_t d) {
+  c_v256 t;
+  t.u64[3] = a;
+  t.u64[2] = b;
+  t.u64[1] = c;
+  t.u64[0] = d;
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_from_v64(c_v64 a, c_v64 b, c_v64 c, c_v64 d) {
+  c_v256 t;
+  t.u64[3] = a.u64;
+  t.u64[2] = b.u64;
+  t.u64[1] = c.u64;
+  t.u64[0] = d.u64;
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_load_unaligned(const void *p) {
+  c_v256 t;
+  uint8_t *pp = (uint8_t *)p;
+  uint8_t *q = (uint8_t *)&t;
+  int c;
+  for (c = 0; c < 32; c++) q[c] = pp[c];
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_load_aligned(const void *p) {
+  if (SIMD_CHECK && (uintptr_t)p & 31) {
+    fprintf(stderr, "Error: unaligned v256 load at %p\n", p);
+    abort();
+  }
+  return c_v256_load_unaligned(p);
+}
+
+SIMD_INLINE void c_v256_store_unaligned(void *p, c_v256 a) {
+  uint8_t *pp = (uint8_t *)p;
+  uint8_t *q = (uint8_t *)&a;
+  int c;
+  for (c = 0; c < 32; c++) pp[c] = q[c];
+}
+
+SIMD_INLINE void c_v256_store_aligned(void *p, c_v256 a) {
+  if (SIMD_CHECK && (uintptr_t)p & 31) {
+    fprintf(stderr, "Error: unaligned v256 store at %p\n", p);
+    abort();
+  }
+  c_v256_store_unaligned(p, a);
+}
+
+SIMD_INLINE c_v256 c_v256_zero() {
+  c_v256 t;
+  t.u64[3] = t.u64[2] = t.u64[1] = t.u64[0] = 0;
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_dup_8(uint8_t x) {
+  c_v256 t;
+  t.v64[3] = t.v64[2] = t.v64[1] = t.v64[0] = c_v64_dup_8(x);
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_dup_16(uint16_t x) {
+  c_v256 t;
+  t.v64[3] = t.v64[2] = t.v64[1] = t.v64[0] = c_v64_dup_16(x);
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_dup_32(uint32_t x) {
+  c_v256 t;
+  t.v64[3] = t.v64[2] = t.v64[1] = t.v64[0] = c_v64_dup_32(x);
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_dup_64(uint64_t x) {
+  c_v256 t;
+  t.u64[3] = t.u64[2] = t.u64[1] = t.u64[0] = x;
+  return t;
+}
+
+SIMD_INLINE int64_t c_v256_dotp_su8(c_v256 a, c_v256 b) {
+  return c_v128_dotp_su8(a.v128[1], b.v128[1]) +
+         c_v128_dotp_su8(a.v128[0], b.v128[0]);
+}
+
+SIMD_INLINE int64_t c_v256_dotp_s16(c_v256 a, c_v256 b) {
+  return c_v128_dotp_s16(a.v128[1], b.v128[1]) +
+         c_v128_dotp_s16(a.v128[0], b.v128[0]);
+}
+
+SIMD_INLINE int64_t c_v256_dotp_s32(c_v256 a, c_v256 b) {
+  return c_v128_dotp_s32(a.v128[1], b.v128[1]) +
+         c_v128_dotp_s32(a.v128[0], b.v128[0]);
+}
+
+SIMD_INLINE uint64_t c_v256_hadd_u8(c_v256 a) {
+  return c_v128_hadd_u8(a.v128[1]) + c_v128_hadd_u8(a.v128[0]);
+}
+
+typedef uint32_t c_sad256_internal;
+
+SIMD_INLINE c_sad256_internal c_v256_sad_u8_init() { return 0; }
+
+/* Implementation dependent return value.  Result must be finalised with
+   v256_sad_u8_sum().
+   The result for more than 16 v256_sad_u8() calls is undefined. */
+SIMD_INLINE c_sad256_internal c_v256_sad_u8(c_sad256_internal s, c_v256 a,
+                                            c_v256 b) {
+  int c;
+  for (c = 0; c < 32; c++)
+    s += a.u8[c] > b.u8[c] ? a.u8[c] - b.u8[c] : b.u8[c] - a.u8[c];
+  return s;
+}
+
+SIMD_INLINE uint32_t c_v256_sad_u8_sum(c_sad256_internal s) { return s; }
+
+typedef uint32_t c_ssd256_internal;
+
+SIMD_INLINE c_ssd256_internal c_v256_ssd_u8_init() { return 0; }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v256_ssd_u8_sum(). */
+SIMD_INLINE c_ssd256_internal c_v256_ssd_u8(c_ssd256_internal s, c_v256 a,
+                                            c_v256 b) {
+  int c;
+  for (c = 0; c < 32; c++) s += (a.u8[c] - b.u8[c]) * (a.u8[c] - b.u8[c]);
+  return s;
+}
+
+SIMD_INLINE uint32_t c_v256_ssd_u8_sum(c_ssd256_internal s) { return s; }
+
+SIMD_INLINE c_v256 c_v256_or(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_or(a.v128[1], b.v128[1]),
+                          c_v128_or(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_xor(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_xor(a.v128[1], b.v128[1]),
+                          c_v128_xor(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_and(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_and(a.v128[1], b.v128[1]),
+                          c_v128_and(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_andn(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_andn(a.v128[1], b.v128[1]),
+                          c_v128_andn(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_add_8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_add_8(a.v128[1], b.v128[1]),
+                          c_v128_add_8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_add_16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_add_16(a.v128[1], b.v128[1]),
+                          c_v128_add_16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_sadd_s8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_sadd_s8(a.v128[1], b.v128[1]),
+                          c_v128_sadd_s8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_sadd_u8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_sadd_u8(a.v128[1], b.v128[1]),
+                          c_v128_sadd_u8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_sadd_s16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_sadd_s16(a.v128[1], b.v128[1]),
+                          c_v128_sadd_s16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_add_32(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_add_32(a.v128[1], b.v128[1]),
+                          c_v128_add_32(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_add_64(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_add_64(a.v128[1], b.v128[1]),
+                          c_v128_add_64(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_sub_64(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_sub_64(a.v128[1], b.v128[1]),
+                          c_v128_sub_64(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_padd_u8(c_v256 a) {
+  c_v256 t;
+  for (int i = 0; i < 16; i++)
+    t.u16[i] = (uint16_t)a.u8[i * 2] + (uint16_t)a.u8[i * 2 + 1];
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_padd_s16(c_v256 a) {
+  c_v256 t;
+  t.s32[0] = (int32_t)a.s16[0] + (int32_t)a.s16[1];
+  t.s32[1] = (int32_t)a.s16[2] + (int32_t)a.s16[3];
+  t.s32[2] = (int32_t)a.s16[4] + (int32_t)a.s16[5];
+  t.s32[3] = (int32_t)a.s16[6] + (int32_t)a.s16[7];
+  t.s32[4] = (int32_t)a.s16[8] + (int32_t)a.s16[9];
+  t.s32[5] = (int32_t)a.s16[10] + (int32_t)a.s16[11];
+  t.s32[6] = (int32_t)a.s16[12] + (int32_t)a.s16[13];
+  t.s32[7] = (int32_t)a.s16[14] + (int32_t)a.s16[15];
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_sub_8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_sub_8(a.v128[1], b.v128[1]),
+                          c_v128_sub_8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_ssub_u8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ssub_u8(a.v128[1], b.v128[1]),
+                          c_v128_ssub_u8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_ssub_s8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ssub_s8(a.v128[1], b.v128[1]),
+                          c_v128_ssub_s8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_sub_16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_sub_16(a.v128[1], b.v128[1]),
+                          c_v128_sub_16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_ssub_s16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ssub_s16(a.v128[1], b.v128[1]),
+                          c_v128_ssub_s16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_ssub_u16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ssub_u16(a.v128[1], b.v128[1]),
+                          c_v128_ssub_u16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_sub_32(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_sub_32(a.v128[1], b.v128[1]),
+                          c_v128_sub_32(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_abs_s16(c_v256 a) {
+  return c_v256_from_v128(c_v128_abs_s16(a.v128[1]), c_v128_abs_s16(a.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_abs_s8(c_v256 a) {
+  return c_v256_from_v128(c_v128_abs_s8(a.v128[1]), c_v128_abs_s8(a.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_mul_s16(c_v128 a, c_v128 b) {
+  c_v128 lo_bits = c_v128_mullo_s16(a, b);
+  c_v128 hi_bits = c_v128_mulhi_s16(a, b);
+  return c_v256_from_v128(c_v128_ziphi_16(hi_bits, lo_bits),
+                          c_v128_ziplo_16(hi_bits, lo_bits));
+}
+
+SIMD_INLINE c_v256 c_v256_mullo_s16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_mullo_s16(a.v128[1], b.v128[1]),
+                          c_v128_mullo_s16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_mulhi_s16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_mulhi_s16(a.v128[1], b.v128[1]),
+                          c_v128_mulhi_s16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_mullo_s32(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_mullo_s32(a.v128[1], b.v128[1]),
+                          c_v128_mullo_s32(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_madd_s16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_madd_s16(a.v128[1], b.v128[1]),
+                          c_v128_madd_s16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_madd_us8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_madd_us8(a.v128[1], b.v128[1]),
+                          c_v128_madd_us8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_avg_u8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_avg_u8(a.v128[1], b.v128[1]),
+                          c_v128_avg_u8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_rdavg_u8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_rdavg_u8(a.v128[1], b.v128[1]),
+                          c_v128_rdavg_u8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_rdavg_u16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_rdavg_u16(a.v128[1], b.v128[1]),
+                          c_v128_rdavg_u16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_avg_u16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_avg_u16(a.v128[1], b.v128[1]),
+                          c_v128_avg_u16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_min_u8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_min_u8(a.v128[1], b.v128[1]),
+                          c_v128_min_u8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_max_u8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_max_u8(a.v128[1], b.v128[1]),
+                          c_v128_max_u8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_min_s8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_min_s8(a.v128[1], b.v128[1]),
+                          c_v128_min_s8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE uint32_t c_v256_movemask_8(c_v256 a) {
+  return ((a.s8[31] < 0) << 31) | ((a.s8[30] < 0) << 30) |
+         ((a.s8[29] < 0) << 29) | ((a.s8[28] < 0) << 28) |
+         ((a.s8[27] < 0) << 27) | ((a.s8[26] < 0) << 26) |
+         ((a.s8[25] < 0) << 25) | ((a.s8[24] < 0) << 24) |
+         ((a.s8[23] < 0) << 23) | ((a.s8[22] < 0) << 22) |
+         ((a.s8[21] < 0) << 21) | ((a.s8[20] < 0) << 20) |
+         ((a.s8[19] < 0) << 19) | ((a.s8[18] < 0) << 18) |
+         ((a.s8[17] < 0) << 17) | ((a.s8[16] < 0) << 16) |
+         ((a.s8[15] < 0) << 15) | ((a.s8[14] < 0) << 14) |
+         ((a.s8[13] < 0) << 13) | ((a.s8[12] < 0) << 12) |
+         ((a.s8[11] < 0) << 11) | ((a.s8[10] < 0) << 10) |
+         ((a.s8[9] < 0) << 9) | ((a.s8[8] < 0) << 8) | ((a.s8[7] < 0) << 7) |
+         ((a.s8[6] < 0) << 6) | ((a.s8[5] < 0) << 5) | ((a.s8[4] < 0) << 4) |
+         ((a.s8[3] < 0) << 3) | ((a.s8[2] < 0) << 2) | ((a.s8[1] < 0) << 1) |
+         ((a.s8[0] < 0) << 0);
+}
+
+SIMD_INLINE c_v256 c_v256_blend_8(c_v256 a, c_v256 b, c_v256 c) {
+  c_v256 t;
+  for (int i = 0; i < 32; i++) t.u8[i] = c.s8[i] < 0 ? b.u8[i] : a.u8[i];
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_max_s8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_max_s8(a.v128[1], b.v128[1]),
+                          c_v128_max_s8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_min_s16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_min_s16(a.v128[1], b.v128[1]),
+                          c_v128_min_s16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_max_s16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_max_s16(a.v128[1], b.v128[1]),
+                          c_v128_max_s16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_min_s32(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_min_s32(a.v128[1], b.v128[1]),
+                          c_v128_min_s32(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_max_s32(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_max_s32(a.v128[1], b.v128[1]),
+                          c_v128_max_s32(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_ziplo_8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ziphi_8(a.v128[0], b.v128[0]),
+                          c_v128_ziplo_8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_ziphi_8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ziphi_8(a.v128[1], b.v128[1]),
+                          c_v128_ziplo_8(a.v128[1], b.v128[1]));
+}
+
+SIMD_INLINE c_v256 c_v256_ziplo_16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ziphi_16(a.v128[0], b.v128[0]),
+                          c_v128_ziplo_16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_ziphi_16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ziphi_16(a.v128[1], b.v128[1]),
+                          c_v128_ziplo_16(a.v128[1], b.v128[1]));
+}
+
+SIMD_INLINE c_v256 c_v256_ziplo_32(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ziphi_32(a.v128[0], b.v128[0]),
+                          c_v128_ziplo_32(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_ziphi_32(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ziphi_32(a.v128[1], b.v128[1]),
+                          c_v128_ziplo_32(a.v128[1], b.v128[1]));
+}
+
+SIMD_INLINE c_v256 c_v256_ziplo_64(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ziphi_64(a.v128[0], b.v128[0]),
+                          c_v128_ziplo_64(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_ziphi_64(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_ziphi_64(a.v128[1], b.v128[1]),
+                          c_v128_ziplo_64(a.v128[1], b.v128[1]));
+}
+
+SIMD_INLINE c_v256 c_v256_ziplo_128(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(a.v128[0], b.v128[0]);
+}
+
+SIMD_INLINE c_v256 c_v256_ziphi_128(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(a.v128[1], b.v128[1]);
+}
+
+SIMD_INLINE c_v256 c_v256_zip_8(c_v128 a, c_v128 b) {
+  return c_v256_from_v128(c_v128_ziphi_8(a, b), c_v128_ziplo_8(a, b));
+}
+
+SIMD_INLINE c_v256 c_v256_zip_16(c_v128 a, c_v128 b) {
+  return c_v256_from_v128(c_v128_ziphi_16(a, b), c_v128_ziplo_16(a, b));
+}
+
+SIMD_INLINE c_v256 c_v256_zip_32(c_v128 a, c_v128 b) {
+  return c_v256_from_v128(c_v128_ziphi_32(a, b), c_v128_ziplo_32(a, b));
+}
+
+SIMD_INLINE c_v256 _c_v256_unzip_8(c_v256 a, c_v256 b, int mode) {
+  c_v256 t;
+  int i;
+  if (mode) {
+    for (i = 0; i < 16; i++) {
+      t.u8[i] = a.u8[i * 2 + 1];
+      t.u8[i + 16] = b.u8[i * 2 + 1];
+    }
+  } else {
+    for (i = 0; i < 16; i++) {
+      t.u8[i] = b.u8[i * 2];
+      t.u8[i + 16] = a.u8[i * 2];
+    }
+  }
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_unziplo_8(c_v256 a, c_v256 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v256_unzip_8(a, b, 1)
+                           : _c_v256_unzip_8(a, b, 0);
+}
+
+SIMD_INLINE c_v256 c_v256_unziphi_8(c_v256 a, c_v256 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v256_unzip_8(b, a, 0)
+                           : _c_v256_unzip_8(b, a, 1);
+}
+
+SIMD_INLINE c_v256 _c_v256_unzip_16(c_v256 a, c_v256 b, int mode) {
+  c_v256 t;
+  int i;
+  if (mode) {
+    for (i = 0; i < 8; i++) {
+      t.u16[i] = a.u16[i * 2 + 1];
+      t.u16[i + 8] = b.u16[i * 2 + 1];
+    }
+  } else {
+    for (i = 0; i < 8; i++) {
+      t.u16[i] = b.u16[i * 2];
+      t.u16[i + 8] = a.u16[i * 2];
+    }
+  }
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_unziplo_16(c_v256 a, c_v256 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v256_unzip_16(a, b, 1)
+                           : _c_v256_unzip_16(a, b, 0);
+}
+
+SIMD_INLINE c_v256 c_v256_unziphi_16(c_v256 a, c_v256 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v256_unzip_16(b, a, 0)
+                           : _c_v256_unzip_16(b, a, 1);
+}
+
+SIMD_INLINE c_v256 _c_v256_unzip_32(c_v256 a, c_v256 b, int mode) {
+  c_v256 t;
+  if (mode) {
+    t.u32[7] = b.u32[7];
+    t.u32[6] = b.u32[5];
+    t.u32[5] = b.u32[3];
+    t.u32[4] = b.u32[1];
+    t.u32[3] = a.u32[7];
+    t.u32[2] = a.u32[5];
+    t.u32[1] = a.u32[3];
+    t.u32[0] = a.u32[1];
+  } else {
+    t.u32[7] = a.u32[6];
+    t.u32[6] = a.u32[4];
+    t.u32[5] = a.u32[2];
+    t.u32[4] = a.u32[0];
+    t.u32[3] = b.u32[6];
+    t.u32[2] = b.u32[4];
+    t.u32[1] = b.u32[2];
+    t.u32[0] = b.u32[0];
+  }
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_unziplo_32(c_v256 a, c_v256 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v256_unzip_32(a, b, 1)
+                           : _c_v256_unzip_32(a, b, 0);
+}
+
+SIMD_INLINE c_v256 c_v256_unziphi_32(c_v256 a, c_v256 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v256_unzip_32(b, a, 0)
+                           : _c_v256_unzip_32(b, a, 1);
+}
+
+SIMD_INLINE c_v256 _c_v256_unzip_64(c_v256 a, c_v256 b, int mode) {
+  c_v256 t;
+  if (mode) {
+    t.u64[3] = b.u64[3];
+    t.u64[2] = b.u64[1];
+    t.u64[1] = a.u64[3];
+    t.u64[0] = a.u64[1];
+  } else {
+    t.u64[3] = a.u64[2];
+    t.u64[2] = a.u64[0];
+    t.u64[1] = b.u64[2];
+    t.u64[0] = b.u64[0];
+  }
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_unziplo_64(c_v256 a, c_v256 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v256_unzip_64(a, b, 1)
+                           : _c_v256_unzip_64(a, b, 0);
+}
+
+SIMD_INLINE c_v256 c_v256_unziphi_64(c_v256 a, c_v256 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v256_unzip_64(b, a, 0)
+                           : _c_v256_unzip_64(b, a, 1);
+}
+
+SIMD_INLINE c_v256 c_v256_unpack_u8_s16(c_v128 a) {
+  return c_v256_from_v128(c_v128_unpackhi_u8_s16(a), c_v128_unpacklo_u8_s16(a));
+}
+
+SIMD_INLINE c_v256 c_v256_unpacklo_u8_s16(c_v256 a) {
+  return c_v256_from_v128(c_v128_unpackhi_u8_s16(a.v128[0]),
+                          c_v128_unpacklo_u8_s16(a.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_unpackhi_u8_s16(c_v256 a) {
+  return c_v256_from_v128(c_v128_unpackhi_u8_s16(a.v128[1]),
+                          c_v128_unpacklo_u8_s16(a.v128[1]));
+}
+
+SIMD_INLINE c_v256 c_v256_unpack_s8_s16(c_v128 a) {
+  return c_v256_from_v128(c_v128_unpackhi_s8_s16(a), c_v128_unpacklo_s8_s16(a));
+}
+
+SIMD_INLINE c_v256 c_v256_unpacklo_s8_s16(c_v256 a) {
+  return c_v256_from_v128(c_v128_unpackhi_s8_s16(a.v128[0]),
+                          c_v128_unpacklo_s8_s16(a.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_unpackhi_s8_s16(c_v256 a) {
+  return c_v256_from_v128(c_v128_unpackhi_s8_s16(a.v128[1]),
+                          c_v128_unpacklo_s8_s16(a.v128[1]));
+}
+
+SIMD_INLINE c_v256 c_v256_pack_s32_s16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_pack_s32_s16(a.v128[1], a.v128[0]),
+                          c_v128_pack_s32_s16(b.v128[1], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_pack_s32_u16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_pack_s32_u16(a.v128[1], a.v128[0]),
+                          c_v128_pack_s32_u16(b.v128[1], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_pack_s16_u8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_pack_s16_u8(a.v128[1], a.v128[0]),
+                          c_v128_pack_s16_u8(b.v128[1], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_pack_s16_s8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_pack_s16_s8(a.v128[1], a.v128[0]),
+                          c_v128_pack_s16_s8(b.v128[1], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_unpack_u16_s32(c_v128 a) {
+  return c_v256_from_v128(c_v128_unpackhi_u16_s32(a),
+                          c_v128_unpacklo_u16_s32(a));
+}
+
+SIMD_INLINE c_v256 c_v256_unpack_s16_s32(c_v128 a) {
+  return c_v256_from_v128(c_v128_unpackhi_s16_s32(a),
+                          c_v128_unpacklo_s16_s32(a));
+}
+
+SIMD_INLINE c_v256 c_v256_unpacklo_u16_s32(c_v256 a) {
+  return c_v256_from_v128(c_v128_unpackhi_u16_s32(a.v128[0]),
+                          c_v128_unpacklo_u16_s32(a.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_unpacklo_s16_s32(c_v256 a) {
+  return c_v256_from_v128(c_v128_unpackhi_s16_s32(a.v128[0]),
+                          c_v128_unpacklo_s16_s32(a.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_unpackhi_u16_s32(c_v256 a) {
+  return c_v256_from_v128(c_v128_unpackhi_u16_s32(a.v128[1]),
+                          c_v128_unpacklo_u16_s32(a.v128[1]));
+}
+
+SIMD_INLINE c_v256 c_v256_unpackhi_s16_s32(c_v256 a) {
+  return c_v256_from_v128(c_v128_unpackhi_s16_s32(a.v128[1]),
+                          c_v128_unpacklo_s16_s32(a.v128[1]));
+}
+
+SIMD_INLINE c_v256 c_v256_shuffle_8(c_v256 a, c_v256 pattern) {
+  c_v256 t;
+  int c;
+  for (c = 0; c < 32; c++)
+    t.u8[c] = a.u8[CONFIG_BIG_ENDIAN ? 31 - (pattern.u8[c] & 31)
+                                     : pattern.u8[c] & 31];
+
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_wideshuffle_8(c_v256 a, c_v256 b, c_v256 pattern) {
+  c_v256 t;
+  int c;
+  for (c = 0; c < 32; c++)
+    t.u8[c] = (pattern.u8[c] < 32
+                   ? b.u8
+                   : a.u8)[CONFIG_BIG_ENDIAN ? 31 - (pattern.u8[c] & 31)
+                                             : pattern.u8[c] & 31];
+  return t;
+}
+
+// Pairwise / dual-lane shuffle: shuffle two 128 bit lates.
+SIMD_INLINE c_v256 c_v256_pshuffle_8(c_v256 a, c_v256 pattern) {
+  return c_v256_from_v128(
+      c_v128_shuffle_8(c_v256_high_v128(a), c_v256_high_v128(pattern)),
+      c_v128_shuffle_8(c_v256_low_v128(a), c_v256_low_v128(pattern)));
+}
+
+SIMD_INLINE c_v256 c_v256_cmpgt_s8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_cmpgt_s8(a.v128[1], b.v128[1]),
+                          c_v128_cmpgt_s8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_cmplt_s8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_cmplt_s8(a.v128[1], b.v128[1]),
+                          c_v128_cmplt_s8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_cmpeq_8(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_cmpeq_8(a.v128[1], b.v128[1]),
+                          c_v128_cmpeq_8(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_cmpgt_s16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_cmpgt_s16(a.v128[1], b.v128[1]),
+                          c_v128_cmpgt_s16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_cmplt_s16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_cmplt_s16(a.v128[1], b.v128[1]),
+                          c_v128_cmplt_s16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_cmpeq_16(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_cmpeq_16(a.v128[1], b.v128[1]),
+                          c_v128_cmpeq_16(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_cmpgt_s32(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_cmpgt_s32(a.v128[1], b.v128[1]),
+                          c_v128_cmpgt_s32(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_cmplt_s32(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_cmplt_s32(a.v128[1], b.v128[1]),
+                          c_v128_cmplt_s32(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_cmpeq_32(c_v256 a, c_v256 b) {
+  return c_v256_from_v128(c_v128_cmpeq_32(a.v128[1], b.v128[1]),
+                          c_v128_cmpeq_32(a.v128[0], b.v128[0]));
+}
+
+SIMD_INLINE c_v256 c_v256_shl_n_byte(c_v256 a, unsigned int n) {
+  if (n < 16)
+    return c_v256_from_v128(c_v128_or(c_v128_shl_n_byte(a.v128[1], n),
+                                      c_v128_shr_n_byte(a.v128[0], 16 - n)),
+                            c_v128_shl_n_byte(a.v128[0], n));
+  else if (n > 16)
+    return c_v256_from_v128(c_v128_shl_n_byte(a.v128[0], n - 16),
+                            c_v128_zero());
+  else
+    return c_v256_from_v128(c_v256_low_v128(a), c_v128_zero());
+}
+
+SIMD_INLINE c_v256 c_v256_shr_n_byte(c_v256 a, unsigned int n) {
+  if (n < 16)
+    return c_v256_from_v128(c_v128_shr_n_byte(a.v128[1], n),
+                            c_v128_or(c_v128_shr_n_byte(a.v128[0], n),
+                                      c_v128_shl_n_byte(a.v128[1], 16 - n)));
+  else if (n > 16)
+    return c_v256_from_v128(c_v128_zero(),
+                            c_v128_shr_n_byte(a.v128[1], n - 16));
+  else
+    return c_v256_from_v128(c_v128_zero(), c_v256_high_v128(a));
+}
+
+SIMD_INLINE c_v256 c_v256_align(c_v256 a, c_v256 b, unsigned int c) {
+  if (SIMD_CHECK && c > 31) {
+    fprintf(stderr, "Error: undefined alignment %d\n", c);
+    abort();
+  }
+  return c ? c_v256_or(c_v256_shr_n_byte(b, c), c_v256_shl_n_byte(a, 32 - c))
+           : b;
+}
+
+SIMD_INLINE c_v256 c_v256_shl_8(c_v256 a, unsigned int c) {
+  return c_v256_from_v128(c_v128_shl_8(a.v128[1], c),
+                          c_v128_shl_8(a.v128[0], c));
+}
+
+SIMD_INLINE c_v256 c_v256_shr_u8(c_v256 a, unsigned int c) {
+  return c_v256_from_v128(c_v128_shr_u8(a.v128[1], c),
+                          c_v128_shr_u8(a.v128[0], c));
+}
+
+SIMD_INLINE c_v256 c_v256_shr_s8(c_v256 a, unsigned int c) {
+  return c_v256_from_v128(c_v128_shr_s8(a.v128[1], c),
+                          c_v128_shr_s8(a.v128[0], c));
+}
+
+SIMD_INLINE c_v256 c_v256_shl_16(c_v256 a, unsigned int c) {
+  return c_v256_from_v128(c_v128_shl_16(a.v128[1], c),
+                          c_v128_shl_16(a.v128[0], c));
+}
+
+SIMD_INLINE c_v256 c_v256_shr_u16(c_v256 a, unsigned int c) {
+  return c_v256_from_v128(c_v128_shr_u16(a.v128[1], c),
+                          c_v128_shr_u16(a.v128[0], c));
+}
+
+SIMD_INLINE c_v256 c_v256_shr_s16(c_v256 a, unsigned int c) {
+  return c_v256_from_v128(c_v128_shr_s16(a.v128[1], c),
+                          c_v128_shr_s16(a.v128[0], c));
+}
+
+SIMD_INLINE c_v256 c_v256_shl_32(c_v256 a, unsigned int c) {
+  return c_v256_from_v128(c_v128_shl_32(a.v128[1], c),
+                          c_v128_shl_32(a.v128[0], c));
+}
+
+SIMD_INLINE c_v256 c_v256_shr_u32(c_v256 a, unsigned int c) {
+  return c_v256_from_v128(c_v128_shr_u32(a.v128[1], c),
+                          c_v128_shr_u32(a.v128[0], c));
+}
+
+SIMD_INLINE c_v256 c_v256_shr_s32(c_v256 a, unsigned int c) {
+  return c_v256_from_v128(c_v128_shr_s32(a.v128[1], c),
+                          c_v128_shr_s32(a.v128[0], c));
+}
+
+SIMD_INLINE c_v256 c_v256_shr_s64(c_v256 a, unsigned int n) {
+  c_v256 t;
+  if (SIMD_CHECK && n > 63) {
+    fprintf(stderr, "Error: undefined s64 shift right %d\n", n);
+    abort();
+  }
+  t.s64[3] = a.s64[3] >> n;
+  t.s64[2] = a.s64[2] >> n;
+  t.s64[1] = a.s64[1] >> n;
+  t.s64[0] = a.s64[0] >> n;
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_shr_u64(c_v256 a, unsigned int n) {
+  c_v256 t;
+  if (SIMD_CHECK && n > 63) {
+    fprintf(stderr, "Error: undefined s64 shift right %d\n", n);
+    abort();
+  }
+  t.u64[3] = a.u64[3] >> n;
+  t.u64[2] = a.u64[2] >> n;
+  t.u64[1] = a.u64[1] >> n;
+  t.u64[0] = a.u64[0] >> n;
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_shl_64(c_v256 a, unsigned int n) {
+  c_v256 t;
+  if (SIMD_CHECK && n > 63) {
+    fprintf(stderr, "Error: undefined s64 shift right %d\n", n);
+    abort();
+  }
+  t.u64[3] = a.u64[3] << n;
+  t.u64[2] = a.u64[2] << n;
+  t.u64[1] = a.u64[1] << n;
+  t.u64[0] = a.u64[0] << n;
+  return t;
+}
+
+SIMD_INLINE c_v256 c_v256_shl_n_8(c_v256 a, unsigned int n) {
+  return c_v256_shl_8(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shl_n_16(c_v256 a, unsigned int n) {
+  return c_v256_shl_16(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shl_n_32(c_v256 a, unsigned int n) {
+  return c_v256_shl_32(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shl_n_64(c_v256 a, unsigned int n) {
+  return c_v256_shl_64(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shr_n_u8(c_v256 a, unsigned int n) {
+  return c_v256_shr_u8(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shr_n_u16(c_v256 a, unsigned int n) {
+  return c_v256_shr_u16(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shr_n_u32(c_v256 a, unsigned int n) {
+  return c_v256_shr_u32(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shr_n_u64(c_v256 a, unsigned int n) {
+  return c_v256_shr_u64(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shr_n_s8(c_v256 a, unsigned int n) {
+  return c_v256_shr_s8(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shr_n_s16(c_v256 a, unsigned int n) {
+  return c_v256_shr_s16(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shr_n_s32(c_v256 a, unsigned int n) {
+  return c_v256_shr_s32(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shr_n_s64(c_v256 a, unsigned int n) {
+  return c_v256_shr_s64(a, n);
+}
+
+SIMD_INLINE c_v256 c_v256_shr_n_word(c_v256 a, const unsigned int n) {
+  return c_v256_shr_n_byte(a, 2 * n);
+}
+SIMD_INLINE c_v256 c_v256_shl_n_word(c_v256 a, const unsigned int n) {
+  return c_v256_shl_n_byte(a, 2 * n);
+}
+
+typedef uint32_t c_sad256_internal_u16;
+
+SIMD_INLINE c_sad256_internal_u16 c_v256_sad_u16_init() { return 0; }
+
+/* Implementation dependent return value.  Result must be finalised with
+   v256_sad_u16_sum(). */
+SIMD_INLINE c_sad256_internal_u16 c_v256_sad_u16(c_sad256_internal_u16 s,
+                                                 c_v256 a, c_v256 b) {
+  int c;
+  for (c = 0; c < 16; c++)
+    s += a.u16[c] > b.u16[c] ? a.u16[c] - b.u16[c] : b.u16[c] - a.u16[c];
+  return s;
+}
+
+SIMD_INLINE uint32_t c_v256_sad_u16_sum(c_sad256_internal_u16 s) { return s; }
+
+typedef uint64_t c_ssd256_internal_s16;
+
+SIMD_INLINE c_ssd256_internal_s16 c_v256_ssd_s16_init() { return 0; }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v256_ssd_s16_sum(). */
+SIMD_INLINE c_ssd256_internal_s16 c_v256_ssd_s16(c_ssd256_internal_s16 s,
+                                                 c_v256 a, c_v256 b) {
+  int c;
+  for (c = 0; c < 16; c++)
+    s += (int32_t)(int16_t)(a.s16[c] - b.s16[c]) *
+         (int32_t)(int16_t)(a.s16[c] - b.s16[c]);
+  return s;
+}
+
+SIMD_INLINE uint64_t c_v256_ssd_s16_sum(c_ssd256_internal_s16 s) { return s; }
+
+#endif  // AOM_AOM_DSP_SIMD_V256_INTRINSICS_C_H_
diff --git a/third_party/aom/aom_dsp/simd/v256_intrinsics_v128.h b/third_party/aom/aom_dsp/simd/v256_intrinsics_v128.h
new file mode 100644
index 0000000000..d5b7905eff
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v256_intrinsics_v128.h
@@ -0,0 +1,873 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V256_INTRINSICS_V128_H_
+#define AOM_AOM_DSP_SIMD_V256_INTRINSICS_V128_H_
+
+#if HAVE_NEON
+#include "aom_dsp/simd/v128_intrinsics_arm.h"
+#elif HAVE_SSE2
+#include "aom_dsp/simd/v128_intrinsics_x86.h"
+#else
+#include "aom_dsp/simd/v128_intrinsics.h"
+#endif
+
+#if HAVE_NEON
+typedef int64x2x2_t v256;
+#else
+typedef struct {
+  v128 val[2];
+} v256;
+#endif
+
+SIMD_INLINE uint32_t v256_low_u32(v256 a) { return v128_low_u32(a.val[0]); }
+
+SIMD_INLINE v64 v256_low_v64(v256 a) { return v128_low_v64(a.val[0]); }
+
+SIMD_INLINE uint64_t v256_low_u64(v256 a) { return v64_u64(v256_low_v64(a)); }
+
+SIMD_INLINE v128 v256_low_v128(v256 a) { return a.val[0]; }
+
+SIMD_INLINE v128 v256_high_v128(v256 a) { return a.val[1]; }
+
+SIMD_INLINE v256 v256_from_v128(v128 hi, v128 lo) {
+  v256 t;
+  t.val[1] = hi;
+  t.val[0] = lo;
+  return t;
+}
+
+SIMD_INLINE v256 v256_from_64(uint64_t a, uint64_t b, uint64_t c, uint64_t d) {
+  return v256_from_v128(v128_from_64(a, b), v128_from_64(c, d));
+}
+
+SIMD_INLINE v256 v256_from_v64(v64 a, v64 b, v64 c, v64 d) {
+  return v256_from_v128(v128_from_v64(a, b), v128_from_v64(c, d));
+}
+
+SIMD_INLINE v256 v256_load_unaligned(const void *p) {
+  return v256_from_v128(v128_load_unaligned((uint8_t *)p + 16),
+                        v128_load_unaligned(p));
+}
+
+SIMD_INLINE v256 v256_load_aligned(const void *p) {
+  return v256_from_v128(v128_load_aligned((uint8_t *)p + 16),
+                        v128_load_aligned(p));
+}
+
+SIMD_INLINE void v256_store_unaligned(void *p, v256 a) {
+  v128_store_unaligned(p, a.val[0]);
+  v128_store_unaligned((uint8_t *)p + 16, a.val[1]);
+}
+
+SIMD_INLINE void v256_store_aligned(void *p, v256 a) {
+  v128_store_aligned(p, a.val[0]);
+  v128_store_aligned((uint8_t *)p + 16, a.val[1]);
+}
+
+SIMD_INLINE v256 v256_zero() {
+  return v256_from_v128(v128_zero(), v128_zero());
+}
+
+SIMD_INLINE v256 v256_dup_8(uint8_t x) {
+  v128 t = v128_dup_8(x);
+  return v256_from_v128(t, t);
+}
+
+SIMD_INLINE v256 v256_dup_16(uint16_t x) {
+  v128 t = v128_dup_16(x);
+  return v256_from_v128(t, t);
+}
+
+SIMD_INLINE v256 v256_dup_32(uint32_t x) {
+  v128 t = v128_dup_32(x);
+  return v256_from_v128(t, t);
+}
+
+SIMD_INLINE v256 v256_dup_64(uint64_t x) {
+  v128 t = v128_dup_64(x);
+  return v256_from_v128(t, t);
+}
+
+SIMD_INLINE int64_t v256_dotp_su8(v256 a, v256 b) {
+  return v128_dotp_su8(a.val[1], b.val[1]) + v128_dotp_su8(a.val[0], b.val[0]);
+}
+
+SIMD_INLINE int64_t v256_dotp_s16(v256 a, v256 b) {
+  return v128_dotp_s16(a.val[1], b.val[1]) + v128_dotp_s16(a.val[0], b.val[0]);
+}
+
+SIMD_INLINE int64_t v256_dotp_s32(v256 a, v256 b) {
+  return v128_dotp_s32(a.val[1], b.val[1]) + v128_dotp_s32(a.val[0], b.val[0]);
+}
+
+SIMD_INLINE uint64_t v256_hadd_u8(v256 a) {
+  return v128_hadd_u8(a.val[1]) + v128_hadd_u8(a.val[0]);
+}
+
+typedef struct {
+  sad128_internal val[2];
+} sad256_internal;
+
+SIMD_INLINE sad256_internal v256_sad_u8_init() {
+  sad256_internal t;
+  t.val[1] = v128_sad_u8_init();
+  t.val[0] = v128_sad_u8_init();
+  return t;
+}
+
+/* Implementation dependent return value.  Result must be finalised with
+   v256_sad_u8_sum().
+   The result for more than 16 v256_sad_u8() calls is undefined. */
+SIMD_INLINE sad256_internal v256_sad_u8(sad256_internal s, v256 a, v256 b) {
+  sad256_internal t;
+  t.val[1] = v128_sad_u8(s.val[1], a.val[1], b.val[1]);
+  t.val[0] = v128_sad_u8(s.val[0], a.val[0], b.val[0]);
+  return t;
+}
+
+SIMD_INLINE uint32_t v256_sad_u8_sum(sad256_internal s) {
+  return v128_sad_u8_sum(s.val[1]) + v128_sad_u8_sum(s.val[0]);
+}
+
+typedef struct {
+  ssd128_internal val[2];
+} ssd256_internal;
+
+SIMD_INLINE ssd256_internal v256_ssd_u8_init() {
+  ssd256_internal t;
+  t.val[1] = v128_ssd_u8_init();
+  t.val[0] = v128_ssd_u8_init();
+  return t;
+}
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v256_ssd_u8_sum(). */
+SIMD_INLINE ssd256_internal v256_ssd_u8(ssd256_internal s, v256 a, v256 b) {
+  ssd256_internal t;
+  t.val[1] = v128_ssd_u8(s.val[1], a.val[1], b.val[1]);
+  t.val[0] = v128_ssd_u8(s.val[0], a.val[0], b.val[0]);
+  return t;
+}
+
+SIMD_INLINE uint32_t v256_ssd_u8_sum(ssd256_internal s) {
+  return v128_ssd_u8_sum(s.val[1]) + v128_ssd_u8_sum(s.val[0]);
+}
+
+SIMD_INLINE v256 v256_or(v256 a, v256 b) {
+  return v256_from_v128(v128_or(a.val[1], b.val[1]),
+                        v128_or(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_xor(v256 a, v256 b) {
+  return v256_from_v128(v128_xor(a.val[1], b.val[1]),
+                        v128_xor(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_and(v256 a, v256 b) {
+  return v256_from_v128(v128_and(a.val[1], b.val[1]),
+                        v128_and(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_andn(v256 a, v256 b) {
+  return v256_from_v128(v128_andn(a.val[1], b.val[1]),
+                        v128_andn(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_add_8(v256 a, v256 b) {
+  return v256_from_v128(v128_add_8(a.val[1], b.val[1]),
+                        v128_add_8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_add_16(v256 a, v256 b) {
+  return v256_from_v128(v128_add_16(a.val[1], b.val[1]),
+                        v128_add_16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_sadd_s8(v256 a, v256 b) {
+  return v256_from_v128(v128_sadd_s8(a.val[1], b.val[1]),
+                        v128_sadd_s8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_sadd_u8(v256 a, v256 b) {
+  return v256_from_v128(v128_sadd_u8(a.val[1], b.val[1]),
+                        v128_sadd_u8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_sadd_s16(v256 a, v256 b) {
+  return v256_from_v128(v128_sadd_s16(a.val[1], b.val[1]),
+                        v128_sadd_s16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_add_32(v256 a, v256 b) {
+  return v256_from_v128(v128_add_32(a.val[1], b.val[1]),
+                        v128_add_32(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_add_64(v256 a, v256 b) {
+  return v256_from_v128(v128_add_64(a.val[1], b.val[1]),
+                        v128_add_64(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_padd_u8(v256 a) {
+  return v256_from_v128(v128_padd_u8(a.val[1]), v128_padd_u8(a.val[0]));
+}
+
+SIMD_INLINE v256 v256_padd_s16(v256 a) {
+  return v256_from_v128(v128_padd_s16(a.val[1]), v128_padd_s16(a.val[0]));
+}
+
+SIMD_INLINE v256 v256_sub_8(v256 a, v256 b) {
+  return v256_from_v128(v128_sub_8(a.val[1], b.val[1]),
+                        v128_sub_8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_ssub_u8(v256 a, v256 b) {
+  return v256_from_v128(v128_ssub_u8(a.val[1], b.val[1]),
+                        v128_ssub_u8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_ssub_s8(v256 a, v256 b) {
+  return v256_from_v128(v128_ssub_s8(a.val[1], b.val[1]),
+                        v128_ssub_s8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_sub_16(v256 a, v256 b) {
+  return v256_from_v128(v128_sub_16(a.val[1], b.val[1]),
+                        v128_sub_16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_ssub_s16(v256 a, v256 b) {
+  return v256_from_v128(v128_ssub_s16(a.val[1], b.val[1]),
+                        v128_ssub_s16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_ssub_u16(v256 a, v256 b) {
+  return v256_from_v128(v128_ssub_u16(a.val[1], b.val[1]),
+                        v128_ssub_u16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_sub_32(v256 a, v256 b) {
+  return v256_from_v128(v128_sub_32(a.val[1], b.val[1]),
+                        v128_sub_32(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_sub_64(v256 a, v256 b) {
+  return v256_from_v128(v128_sub_64(a.val[1], b.val[1]),
+                        v128_sub_64(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_abs_s16(v256 a) {
+  return v256_from_v128(v128_abs_s16(a.val[1]), v128_abs_s16(a.val[0]));
+}
+
+SIMD_INLINE v256 v256_abs_s8(v256 a) {
+  return v256_from_v128(v128_abs_s8(a.val[1]), v128_abs_s8(a.val[0]));
+}
+
+SIMD_INLINE v256 v256_mul_s16(v128 a, v128 b) {
+  v128 lo_bits = v128_mullo_s16(a, b);
+  v128 hi_bits = v128_mulhi_s16(a, b);
+  return v256_from_v128(v128_ziphi_16(hi_bits, lo_bits),
+                        v128_ziplo_16(hi_bits, lo_bits));
+}
+
+SIMD_INLINE v256 v256_mullo_s16(v256 a, v256 b) {
+  return v256_from_v128(v128_mullo_s16(a.val[1], b.val[1]),
+                        v128_mullo_s16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_mulhi_s16(v256 a, v256 b) {
+  return v256_from_v128(v128_mulhi_s16(a.val[1], b.val[1]),
+                        v128_mulhi_s16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_mullo_s32(v256 a, v256 b) {
+  return v256_from_v128(v128_mullo_s32(a.val[1], b.val[1]),
+                        v128_mullo_s32(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_madd_s16(v256 a, v256 b) {
+  return v256_from_v128(v128_madd_s16(a.val[1], b.val[1]),
+                        v128_madd_s16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_madd_us8(v256 a, v256 b) {
+  return v256_from_v128(v128_madd_us8(a.val[1], b.val[1]),
+                        v128_madd_us8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_avg_u8(v256 a, v256 b) {
+  return v256_from_v128(v128_avg_u8(a.val[1], b.val[1]),
+                        v128_avg_u8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_rdavg_u8(v256 a, v256 b) {
+  return v256_from_v128(v128_rdavg_u8(a.val[1], b.val[1]),
+                        v128_rdavg_u8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_rdavg_u16(v256 a, v256 b) {
+  return v256_from_v128(v128_rdavg_u16(a.val[1], b.val[1]),
+                        v128_rdavg_u16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_avg_u16(v256 a, v256 b) {
+  return v256_from_v128(v128_avg_u16(a.val[1], b.val[1]),
+                        v128_avg_u16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_min_u8(v256 a, v256 b) {
+  return v256_from_v128(v128_min_u8(a.val[1], b.val[1]),
+                        v128_min_u8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_max_u8(v256 a, v256 b) {
+  return v256_from_v128(v128_max_u8(a.val[1], b.val[1]),
+                        v128_max_u8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_min_s8(v256 a, v256 b) {
+  return v256_from_v128(v128_min_s8(a.val[1], b.val[1]),
+                        v128_min_s8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE uint32_t v256_movemask_8(v256 a) {
+  return (v128_movemask_8(v256_high_v128(a)) << 16) |
+         v128_movemask_8(v256_low_v128(a));
+}
+
+SIMD_INLINE v256 v256_blend_8(v256 a, v256 b, v256 c) {
+  return v256_from_v128(v128_blend_8(a.val[1], b.val[1], c.val[1]),
+                        v128_blend_8(a.val[0], b.val[0], c.val[0]));
+}
+
+SIMD_INLINE v256 v256_max_s8(v256 a, v256 b) {
+  return v256_from_v128(v128_max_s8(a.val[1], b.val[1]),
+                        v128_max_s8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_min_s16(v256 a, v256 b) {
+  return v256_from_v128(v128_min_s16(a.val[1], b.val[1]),
+                        v128_min_s16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_max_s16(v256 a, v256 b) {
+  return v256_from_v128(v128_max_s16(a.val[1], b.val[1]),
+                        v128_max_s16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_min_s32(v256 a, v256 b) {
+  return v256_from_v128(v128_min_s32(a.val[1], b.val[1]),
+                        v128_min_s32(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_max_s32(v256 a, v256 b) {
+  return v256_from_v128(v128_max_s32(a.val[1], b.val[1]),
+                        v128_max_s32(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_ziplo_8(v256 a, v256 b) {
+  return v256_from_v128(v128_ziphi_8(a.val[0], b.val[0]),
+                        v128_ziplo_8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_ziphi_8(v256 a, v256 b) {
+  return v256_from_v128(v128_ziphi_8(a.val[1], b.val[1]),
+                        v128_ziplo_8(a.val[1], b.val[1]));
+}
+
+SIMD_INLINE v256 v256_ziplo_16(v256 a, v256 b) {
+  return v256_from_v128(v128_ziphi_16(a.val[0], b.val[0]),
+                        v128_ziplo_16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_ziphi_16(v256 a, v256 b) {
+  return v256_from_v128(v128_ziphi_16(a.val[1], b.val[1]),
+                        v128_ziplo_16(a.val[1], b.val[1]));
+}
+
+SIMD_INLINE v256 v256_ziplo_32(v256 a, v256 b) {
+  return v256_from_v128(v128_ziphi_32(a.val[0], b.val[0]),
+                        v128_ziplo_32(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_ziphi_32(v256 a, v256 b) {
+  return v256_from_v128(v128_ziphi_32(a.val[1], b.val[1]),
+                        v128_ziplo_32(a.val[1], b.val[1]));
+}
+
+SIMD_INLINE v256 v256_ziplo_64(v256 a, v256 b) {
+  return v256_from_v128(v128_ziphi_64(a.val[0], b.val[0]),
+                        v128_ziplo_64(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_ziphi_64(v256 a, v256 b) {
+  return v256_from_v128(v128_ziphi_64(a.val[1], b.val[1]),
+                        v128_ziplo_64(a.val[1], b.val[1]));
+}
+
+SIMD_INLINE v256 v256_ziplo_128(v256 a, v256 b) {
+  return v256_from_v128(a.val[0], b.val[0]);
+}
+
+SIMD_INLINE v256 v256_ziphi_128(v256 a, v256 b) {
+  return v256_from_v128(a.val[1], b.val[1]);
+}
+
+SIMD_INLINE v256 v256_zip_8(v128 a, v128 b) {
+  return v256_from_v128(v128_ziphi_8(a, b), v128_ziplo_8(a, b));
+}
+
+SIMD_INLINE v256 v256_zip_16(v128 a, v128 b) {
+  return v256_from_v128(v128_ziphi_16(a, b), v128_ziplo_16(a, b));
+}
+
+SIMD_INLINE v256 v256_zip_32(v128 a, v128 b) {
+  return v256_from_v128(v128_ziphi_32(a, b), v128_ziplo_32(a, b));
+}
+
+SIMD_INLINE v256 v256_unziplo_8(v256 a, v256 b) {
+  return v256_from_v128(v128_unziplo_8(a.val[1], a.val[0]),
+                        v128_unziplo_8(b.val[1], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_unziphi_8(v256 a, v256 b) {
+  return v256_from_v128(v128_unziphi_8(a.val[1], a.val[0]),
+                        v128_unziphi_8(b.val[1], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_unziplo_16(v256 a, v256 b) {
+  return v256_from_v128(v128_unziplo_16(a.val[1], a.val[0]),
+                        v128_unziplo_16(b.val[1], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_unziphi_16(v256 a, v256 b) {
+  return v256_from_v128(v128_unziphi_16(a.val[1], a.val[0]),
+                        v128_unziphi_16(b.val[1], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_unziplo_32(v256 a, v256 b) {
+  return v256_from_v128(v128_unziplo_32(a.val[1], a.val[0]),
+                        v128_unziplo_32(b.val[1], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_unziphi_32(v256 a, v256 b) {
+  return v256_from_v128(v128_unziphi_32(a.val[1], a.val[0]),
+                        v128_unziphi_32(b.val[1], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_unziplo_64(v256 a, v256 b) {
+#if HAVE_SSE2
+  return v256_from_v128(
+      _mm_castpd_si128(_mm_shuffle_pd(_mm_castsi128_pd(a.val[0]),
+                                      _mm_castsi128_pd(a.val[1]), 0)),
+      _mm_castpd_si128(_mm_shuffle_pd(_mm_castsi128_pd(b.val[0]),
+                                      _mm_castsi128_pd(b.val[1]), 0)));
+#else
+  return v256_from_v64(v128_low_v64(a.val[1]), v128_low_v64(a.val[0]),
+                       v128_low_v64(b.val[1]), v128_low_v64(b.val[0]));
+#endif
+}
+
+SIMD_INLINE v256 v256_unziphi_64(v256 a, v256 b) {
+#if HAVE_SSE2
+  return v256_from_v128(
+      _mm_castpd_si128(_mm_shuffle_pd(_mm_castsi128_pd(a.val[0]),
+                                      _mm_castsi128_pd(a.val[1]), 3)),
+      _mm_castpd_si128(_mm_shuffle_pd(_mm_castsi128_pd(b.val[0]),
+                                      _mm_castsi128_pd(b.val[1]), 3)));
+#else
+  return v256_from_v64(v128_high_v64(a.val[1]), v128_high_v64(a.val[0]),
+                       v128_high_v64(b.val[1]), v128_high_v64(b.val[0]));
+#endif
+}
+
+SIMD_INLINE v256 v256_unpack_u8_s16(v128 a) {
+  return v256_from_v128(v128_unpackhi_u8_s16(a), v128_unpacklo_u8_s16(a));
+}
+
+SIMD_INLINE v256 v256_unpacklo_u8_s16(v256 a) {
+  return v256_from_v128(v128_unpackhi_u8_s16(a.val[0]),
+                        v128_unpacklo_u8_s16(a.val[0]));
+}
+
+SIMD_INLINE v256 v256_unpackhi_u8_s16(v256 a) {
+  return v256_from_v128(v128_unpackhi_u8_s16(a.val[1]),
+                        v128_unpacklo_u8_s16(a.val[1]));
+}
+
+SIMD_INLINE v256 v256_unpack_s8_s16(v128 a) {
+  return v256_from_v128(v128_unpackhi_s8_s16(a), v128_unpacklo_s8_s16(a));
+}
+
+SIMD_INLINE v256 v256_unpacklo_s8_s16(v256 a) {
+  return v256_from_v128(v128_unpackhi_s8_s16(a.val[0]),
+                        v128_unpacklo_s8_s16(a.val[0]));
+}
+
+SIMD_INLINE v256 v256_unpackhi_s8_s16(v256 a) {
+  return v256_from_v128(v128_unpackhi_s8_s16(a.val[1]),
+                        v128_unpacklo_s8_s16(a.val[1]));
+}
+
+SIMD_INLINE v256 v256_pack_s32_s16(v256 a, v256 b) {
+  return v256_from_v128(v128_pack_s32_s16(a.val[1], a.val[0]),
+                        v128_pack_s32_s16(b.val[1], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_pack_s32_u16(v256 a, v256 b) {
+  return v256_from_v128(v128_pack_s32_u16(a.val[1], a.val[0]),
+                        v128_pack_s32_u16(b.val[1], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_pack_s16_u8(v256 a, v256 b) {
+  return v256_from_v128(v128_pack_s16_u8(a.val[1], a.val[0]),
+                        v128_pack_s16_u8(b.val[1], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_pack_s16_s8(v256 a, v256 b) {
+  return v256_from_v128(v128_pack_s16_s8(a.val[1], a.val[0]),
+                        v128_pack_s16_s8(b.val[1], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_unpack_u16_s32(v128 a) {
+  return v256_from_v128(v128_unpackhi_u16_s32(a), v128_unpacklo_u16_s32(a));
+}
+
+SIMD_INLINE v256 v256_unpack_s16_s32(v128 a) {
+  return v256_from_v128(v128_unpackhi_s16_s32(a), v128_unpacklo_s16_s32(a));
+}
+
+SIMD_INLINE v256 v256_unpacklo_u16_s32(v256 a) {
+  return v256_from_v128(v128_unpackhi_u16_s32(a.val[0]),
+                        v128_unpacklo_u16_s32(a.val[0]));
+}
+
+SIMD_INLINE v256 v256_unpacklo_s16_s32(v256 a) {
+  return v256_from_v128(v128_unpackhi_s16_s32(a.val[0]),
+                        v128_unpacklo_s16_s32(a.val[0]));
+}
+
+SIMD_INLINE v256 v256_unpackhi_u16_s32(v256 a) {
+  return v256_from_v128(v128_unpackhi_u16_s32(a.val[1]),
+                        v128_unpacklo_u16_s32(a.val[1]));
+}
+
+SIMD_INLINE v256 v256_unpackhi_s16_s32(v256 a) {
+  return v256_from_v128(v128_unpackhi_s16_s32(a.val[1]),
+                        v128_unpacklo_s16_s32(a.val[1]));
+}
+
+SIMD_INLINE v256 v256_cmpgt_s8(v256 a, v256 b) {
+  return v256_from_v128(v128_cmpgt_s8(a.val[1], b.val[1]),
+                        v128_cmpgt_s8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_cmplt_s8(v256 a, v256 b) {
+  return v256_from_v128(v128_cmplt_s8(a.val[1], b.val[1]),
+                        v128_cmplt_s8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_cmpeq_8(v256 a, v256 b) {
+  return v256_from_v128(v128_cmpeq_8(a.val[1], b.val[1]),
+                        v128_cmpeq_8(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_cmpgt_s16(v256 a, v256 b) {
+  return v256_from_v128(v128_cmpgt_s16(a.val[1], b.val[1]),
+                        v128_cmpgt_s16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_cmplt_s16(v256 a, v256 b) {
+  return v256_from_v128(v128_cmplt_s16(a.val[1], b.val[1]),
+                        v128_cmplt_s16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_cmpeq_16(v256 a, v256 b) {
+  return v256_from_v128(v128_cmpeq_16(a.val[1], b.val[1]),
+                        v128_cmpeq_16(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_cmpgt_s32(v256 a, v256 b) {
+  return v256_from_v128(v128_cmpgt_s32(a.val[1], b.val[1]),
+                        v128_cmpgt_s32(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_cmplt_s32(v256 a, v256 b) {
+  return v256_from_v128(v128_cmplt_s32(a.val[1], b.val[1]),
+                        v128_cmplt_s32(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_cmpeq_32(v256 a, v256 b) {
+  return v256_from_v128(v128_cmpeq_32(a.val[1], b.val[1]),
+                        v128_cmpeq_32(a.val[0], b.val[0]));
+}
+
+SIMD_INLINE v256 v256_shuffle_8(v256 x, v256 pattern) {
+#if HAVE_NEON
+#if defined(__aarch64__)
+  uint8x16x2_t p = { { vreinterpretq_u8_s64(x.val[0]),
+                       vreinterpretq_u8_s64(x.val[1]) } };
+  return v256_from_v128(
+      vreinterpretq_s64_u8(vqtbl2q_u8(p, vreinterpretq_u8_s64(pattern.val[1]))),
+      vreinterpretq_s64_u8(
+          vqtbl2q_u8(p, vreinterpretq_u8_s64(pattern.val[0]))));
+#else
+  uint8x8x4_t p = { { vget_low_u8(vreinterpretq_u8_s64(x.val[0])),
+                      vget_high_u8(vreinterpretq_u8_s64(x.val[0])),
+                      vget_low_u8(vreinterpretq_u8_s64(x.val[1])),
+                      vget_high_u8(vreinterpretq_u8_s64(x.val[1])) } };
+  return v256_from_64(
+      (uint64_t)vreinterpret_s64_u8(
+          vtbl4_u8(p, vreinterpret_u8_s64(vget_high_s64(pattern.val[1])))),
+      (uint64_t)vreinterpret_s64_u8(
+          vtbl4_u8(p, vreinterpret_u8_s64(vget_low_s64(pattern.val[1])))),
+      (uint64_t)vreinterpret_s64_u8(
+          vtbl4_u8(p, vreinterpret_u8_s64(vget_high_s64(pattern.val[0])))),
+      (uint64_t)vreinterpret_s64_u8(
+          vtbl4_u8(p, vreinterpret_u8_s64(vget_low_s64(pattern.val[0])))));
+#endif
+#else
+  v128 c16 = v128_dup_8(16);
+  v128 maskhi = v128_cmplt_s8(pattern.val[1], c16);
+  v128 masklo = v128_cmplt_s8(pattern.val[0], c16);
+  return v256_from_v128(
+      v128_blend_8(v128_shuffle_8(x.val[1], v128_sub_8(pattern.val[1], c16)),
+                   v128_shuffle_8(x.val[0], pattern.val[1]), maskhi),
+      v128_blend_8(v128_shuffle_8(x.val[1], v128_sub_8(pattern.val[0], c16)),
+                   v128_shuffle_8(x.val[0], pattern.val[0]), masklo));
+#endif
+}
+
+SIMD_INLINE v256 v256_wideshuffle_8(v256 x, v256 y, v256 pattern) {
+#if HAVE_NEON
+#if defined(__aarch64__)
+  uint8x16x4_t p = { {
+      vreinterpretq_u8_s64(y.val[0]),
+      vreinterpretq_u8_s64(y.val[1]),
+      vreinterpretq_u8_s64(x.val[0]),
+      vreinterpretq_u8_s64(x.val[1]),
+  } };
+  return v256_from_v128(
+      vreinterpretq_s64_u8(vqtbl4q_u8(p, vreinterpretq_u8_s64(pattern.val[1]))),
+      vreinterpretq_s64_u8(
+          vqtbl4q_u8(p, vreinterpretq_u8_s64(pattern.val[0]))));
+#else
+  v256 c32 = v256_dup_8(32);
+  v256 p32 = v256_sub_8(pattern, c32);
+  uint8x8x4_t p = { { vget_low_u8(vreinterpretq_u8_s64(x.val[0])),
+                      vget_high_u8(vreinterpretq_u8_s64(x.val[0])),
+                      vget_low_u8(vreinterpretq_u8_s64(x.val[1])),
+                      vget_high_u8(vreinterpretq_u8_s64(x.val[1])) } };
+  uint8x8x4_t q = { { vget_low_u8(vreinterpretq_u8_s64(y.val[0])),
+                      vget_high_u8(vreinterpretq_u8_s64(y.val[0])),
+                      vget_low_u8(vreinterpretq_u8_s64(y.val[1])),
+                      vget_high_u8(vreinterpretq_u8_s64(y.val[1])) } };
+  v256 r1 =
+      v256_from_64((uint64_t)vreinterpret_s64_u8(vtbl4_u8(
+                       p, vreinterpret_u8_s64(vget_high_s64(p32.val[1])))),
+                   (uint64_t)vreinterpret_s64_u8(vtbl4_u8(
+                       p, vreinterpret_u8_s64(vget_low_s64(p32.val[1])))),
+                   (uint64_t)vreinterpret_s64_u8(vtbl4_u8(
+                       p, vreinterpret_u8_s64(vget_high_s64(p32.val[0])))),
+                   (uint64_t)vreinterpret_s64_u8(vtbl4_u8(
+                       p, vreinterpret_u8_s64(vget_low_s64(p32.val[0])))));
+  v256 r2 =
+      v256_from_64((uint64_t)vreinterpret_s64_u8(vtbl4_u8(
+                       q, vreinterpret_u8_s64(vget_high_s64(pattern.val[1])))),
+                   (uint64_t)vreinterpret_s64_u8(vtbl4_u8(
+                       q, vreinterpret_u8_s64(vget_low_s64(pattern.val[1])))),
+                   (uint64_t)vreinterpret_s64_u8(vtbl4_u8(
+                       q, vreinterpret_u8_s64(vget_high_s64(pattern.val[0])))),
+                   (uint64_t)vreinterpret_s64_u8(vtbl4_u8(
+                       q, vreinterpret_u8_s64(vget_low_s64(pattern.val[0])))));
+  return v256_blend_8(r1, r2, v256_cmplt_s8(pattern, c32));
+#endif
+#else
+  v128 c16 = v128_dup_8(16);
+  v128 c32 = v128_dup_8(32);
+  v128 c48 = v128_dup_8(48);
+  v128 maskhi16 = v128_cmpgt_s8(c16, pattern.val[1]);
+  v128 masklo16 = v128_cmpgt_s8(c16, pattern.val[0]);
+  v128 maskhi48 = v128_cmpgt_s8(c48, pattern.val[1]);
+  v128 masklo48 = v128_cmpgt_s8(c48, pattern.val[0]);
+  v256 r1 = v256_from_v128(
+      v128_blend_8(v128_shuffle_8(x.val[1], v128_sub_8(pattern.val[1], c48)),
+                   v128_shuffle_8(x.val[0], v128_sub_8(pattern.val[1], c32)),
+                   maskhi48),
+      v128_blend_8(v128_shuffle_8(x.val[1], v128_sub_8(pattern.val[0], c48)),
+                   v128_shuffle_8(x.val[0], v128_sub_8(pattern.val[0], c32)),
+                   masklo48));
+  v256 r2 = v256_from_v128(
+      v128_blend_8(v128_shuffle_8(y.val[1], v128_sub_8(pattern.val[1], c16)),
+                   v128_shuffle_8(y.val[0], pattern.val[1]), maskhi16),
+      v128_blend_8(v128_shuffle_8(y.val[1], v128_sub_8(pattern.val[0], c16)),
+                   v128_shuffle_8(y.val[0], pattern.val[0]), masklo16));
+  return v256_blend_8(r1, r2, v256_cmpgt_s8(v256_from_v128(c32, c32), pattern));
+#endif
+}
+
+SIMD_INLINE v256 v256_pshuffle_8(v256 a, v256 pattern) {
+  return v256_from_v128(
+      v128_shuffle_8(v256_high_v128(a), v256_high_v128(pattern)),
+      v128_shuffle_8(v256_low_v128(a), v256_low_v128(pattern)));
+}
+
+SIMD_INLINE v256 v256_shl_8(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shl_8(a.val[1], c), v128_shl_8(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shr_u8(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shr_u8(a.val[1], c), v128_shr_u8(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shr_s8(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shr_s8(a.val[1], c), v128_shr_s8(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shl_16(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shl_16(a.val[1], c), v128_shl_16(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shr_u16(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shr_u16(a.val[1], c), v128_shr_u16(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shr_s16(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shr_s16(a.val[1], c), v128_shr_s16(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shl_32(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shl_32(a.val[1], c), v128_shl_32(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shr_u32(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shr_u32(a.val[1], c), v128_shr_u32(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shr_s32(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shr_s32(a.val[1], c), v128_shr_s32(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shl_64(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shl_64(a.val[1], c), v128_shl_64(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shr_u64(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shr_u64(a.val[1], c), v128_shr_u64(a.val[0], c));
+}
+
+SIMD_INLINE v256 v256_shr_s64(v256 a, const unsigned int c) {
+  return v256_from_v128(v128_shr_s64(a.val[1], c), v128_shr_s64(a.val[0], c));
+}
+
+/* These intrinsics require immediate values, so we must use #defines
+   to enforce that. */
+#define v256_shl_n_byte(a, n)                                              \
+  ((n) < 16 ? v256_from_v128(v128_or(v128_shl_n_byte(a.val[1], n),         \
+                                     v128_shr_n_byte(a.val[0], 16 - (n))), \
+                             v128_shl_n_byte(a.val[0], (n)))               \
+            : v256_from_v128(                                              \
+                  (n) > 16 ? v128_shl_n_byte(a.val[0], (n)-16) : a.val[0], \
+                  v128_zero()))
+
+#define v256_shr_n_byte(a, n)                                              \
+  ((n) < 16 ? v256_from_v128(v128_shr_n_byte(a.val[1], n),                 \
+                             v128_or(v128_shr_n_byte(a.val[0], n),         \
+                                     v128_shl_n_byte(a.val[1], 16 - (n)))) \
+            : v256_from_v128(                                              \
+                  v128_zero(),                                             \
+                  (n) > 16 ? v128_shr_n_byte(a.val[1], (n)-16) : a.val[1]))
+
+#define v256_align(a, b, c) \
+  ((c) ? v256_or(v256_shr_n_byte(b, c), v256_shl_n_byte(a, 32 - (c))) : b)
+
+#define v256_shl_n_8(a, n) \
+  v256_from_v128(v128_shl_n_8(a.val[1], n), v128_shl_n_8(a.val[0], n))
+#define v256_shl_n_16(a, n) \
+  v256_from_v128(v128_shl_n_16(a.val[1], n), v128_shl_n_16(a.val[0], n))
+#define v256_shl_n_32(a, n) \
+  v256_from_v128(v128_shl_n_32(a.val[1], n), v128_shl_n_32(a.val[0], n))
+#define v256_shl_n_64(a, n) \
+  v256_from_v128(v128_shl_n_64(a.val[1], n), v128_shl_n_64(a.val[0], n))
+#define v256_shr_n_u8(a, n) \
+  v256_from_v128(v128_shr_n_u8(a.val[1], n), v128_shr_n_u8(a.val[0], n))
+#define v256_shr_n_u16(a, n) \
+  v256_from_v128(v128_shr_n_u16(a.val[1], n), v128_shr_n_u16(a.val[0], n))
+#define v256_shr_n_u32(a, n) \
+  v256_from_v128(v128_shr_n_u32(a.val[1], n), v128_shr_n_u32(a.val[0], n))
+#define v256_shr_n_u64(a, n) \
+  v256_from_v128(v128_shr_n_u64(a.val[1], n), v128_shr_n_u64(a.val[0], n))
+#define v256_shr_n_s8(a, n) \
+  v256_from_v128(v128_shr_n_s8(a.val[1], n), v128_shr_n_s8(a.val[0], n))
+#define v256_shr_n_s16(a, n) \
+  v256_from_v128(v128_shr_n_s16(a.val[1], n), v128_shr_n_s16(a.val[0], n))
+#define v256_shr_n_s32(a, n) \
+  v256_from_v128(v128_shr_n_s32(a.val[1], n), v128_shr_n_s32(a.val[0], n))
+#define v256_shr_n_s64(a, n) \
+  v256_from_v128(v128_shr_n_s64(a.val[1], n), v128_shr_n_s64(a.val[0], n))
+
+#define v256_shr_n_word(a, n) v256_shr_n_byte(a, 2 * (n))
+#define v256_shl_n_word(a, n) v256_shl_n_byte(a, 2 * (n))
+
+typedef struct {
+  sad128_internal_u16 val[2];
+} sad256_internal_u16;
+
+SIMD_INLINE sad256_internal_u16 v256_sad_u16_init() {
+  sad256_internal_u16 t;
+  t.val[1] = v128_sad_u16_init();
+  t.val[0] = v128_sad_u16_init();
+  return t;
+}
+
+/* Implementation dependent return value.  Result must be finalised with
+   v256_sad_u16_sum().
+   The result for more than 16 v256_sad_u16() calls is undefined. */
+SIMD_INLINE sad256_internal_u16 v256_sad_u16(sad256_internal_u16 s, v256 a,
+                                             v256 b) {
+  sad256_internal_u16 t;
+  t.val[1] = v128_sad_u16(s.val[1], a.val[1], b.val[1]);
+  t.val[0] = v128_sad_u16(s.val[0], a.val[0], b.val[0]);
+  return t;
+}
+
+SIMD_INLINE uint32_t v256_sad_u16_sum(sad256_internal_u16 s) {
+  return v128_sad_u16_sum(s.val[1]) + v128_sad_u16_sum(s.val[0]);
+}
+
+typedef struct {
+  ssd128_internal_s16 val[2];
+} ssd256_internal_s16;
+
+SIMD_INLINE ssd256_internal_s16 v256_ssd_s16_init() {
+  ssd256_internal_s16 t;
+  t.val[1] = v128_ssd_s16_init();
+  t.val[0] = v128_ssd_s16_init();
+  return t;
+}
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v256_ssd_s16_sum(). */
+SIMD_INLINE ssd256_internal_s16 v256_ssd_s16(ssd256_internal_s16 s, v256 a,
+                                             v256 b) {
+  ssd256_internal_s16 t;
+  t.val[1] = v128_ssd_s16(s.val[1], a.val[1], b.val[1]);
+  t.val[0] = v128_ssd_s16(s.val[0], a.val[0], b.val[0]);
+  return t;
+}
+
+SIMD_INLINE uint64_t v256_ssd_s16_sum(ssd256_internal_s16 s) {
+  return v128_ssd_s16_sum(s.val[1]) + v128_ssd_s16_sum(s.val[0]);
+}
+
+#endif  // AOM_AOM_DSP_SIMD_V256_INTRINSICS_V128_H_
diff --git a/third_party/aom/aom_dsp/simd/v256_intrinsics_x86.h b/third_party/aom/aom_dsp/simd/v256_intrinsics_x86.h
new file mode 100644
index 0000000000..44594bc41c
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v256_intrinsics_x86.h
@@ -0,0 +1,750 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V256_INTRINSICS_X86_H_
+#define AOM_AOM_DSP_SIMD_V256_INTRINSICS_X86_H_
+
+#if !defined(__AVX2__)
+
+#include "aom_dsp/simd/v256_intrinsics_v128.h"
+
+#else
+
+// The _m256i type seems to cause problems for g++'s mangling prior to
+// version 5, but adding -fabi-version=0 fixes this.
+#if !defined(__clang__) && defined(__GNUC__) && __GNUC__ < 5 && \
+    defined(__AVX2__) && defined(__cplusplus)
+#pragma GCC optimize "-fabi-version=0"
+#endif
+
+#include <immintrin.h>
+
+#include "aom_dsp/simd/v128_intrinsics_x86.h"
+
+typedef __m256i v256;
+
+SIMD_INLINE uint32_t v256_low_u32(v256 a) {
+  return (uint32_t)_mm_cvtsi128_si32(_mm256_extracti128_si256(a, 0));
+}
+
+SIMD_INLINE v64 v256_low_v64(v256 a) {
+  return _mm_unpacklo_epi64(_mm256_extracti128_si256(a, 0), v64_zero());
+}
+
+SIMD_INLINE uint64_t v256_low_u64(v256 a) { return v64_u64(v256_low_v64(a)); }
+
+SIMD_INLINE v128 v256_low_v128(v256 a) { return _mm256_castsi256_si128(a); }
+
+SIMD_INLINE v128 v256_high_v128(v256 a) {
+  return _mm256_extracti128_si256(a, 1);
+}
+
+SIMD_INLINE v256 v256_from_v128(v128 a, v128 b) {
+  // gcc seems to be missing _mm256_set_m128i()
+  return _mm256_inserti128_si256(_mm256_castsi128_si256(b), a, 1);
+}
+
+SIMD_INLINE v256 v256_from_v64(v64 a, v64 b, v64 c, v64 d) {
+  return v256_from_v128(v128_from_v64(a, b), v128_from_v64(c, d));
+}
+
+SIMD_INLINE v256 v256_from_64(uint64_t a, uint64_t b, uint64_t c, uint64_t d) {
+  return v256_from_v128(v128_from_64(a, b), v128_from_64(c, d));
+}
+
+SIMD_INLINE v256 v256_load_aligned(const void *p) {
+  return _mm256_load_si256((const __m256i *)p);
+}
+
+SIMD_INLINE v256 v256_load_unaligned(const void *p) {
+  return _mm256_loadu_si256((const __m256i *)p);
+}
+
+SIMD_INLINE void v256_store_aligned(void *p, v256 a) {
+  _mm256_store_si256((__m256i *)p, a);
+}
+
+SIMD_INLINE void v256_store_unaligned(void *p, v256 a) {
+  _mm256_storeu_si256((__m256i *)p, a);
+}
+
+SIMD_INLINE v256 v256_zero() { return _mm256_setzero_si256(); }
+
+SIMD_INLINE v256 v256_dup_8(uint8_t x) { return _mm256_set1_epi8(x); }
+
+SIMD_INLINE v256 v256_dup_16(uint16_t x) { return _mm256_set1_epi16(x); }
+
+SIMD_INLINE v256 v256_dup_32(uint32_t x) { return _mm256_set1_epi32(x); }
+
+SIMD_INLINE v256 v256_dup_64(uint64_t x) { return _mm256_set1_epi64x(x); }
+
+SIMD_INLINE v256 v256_add_8(v256 a, v256 b) { return _mm256_add_epi8(a, b); }
+
+SIMD_INLINE v256 v256_add_16(v256 a, v256 b) { return _mm256_add_epi16(a, b); }
+
+SIMD_INLINE v256 v256_sadd_u8(v256 a, v256 b) { return _mm256_adds_epu8(a, b); }
+
+SIMD_INLINE v256 v256_sadd_s8(v256 a, v256 b) { return _mm256_adds_epi8(a, b); }
+
+SIMD_INLINE v256 v256_sadd_s16(v256 a, v256 b) {
+  return _mm256_adds_epi16(a, b);
+}
+
+SIMD_INLINE v256 v256_add_32(v256 a, v256 b) { return _mm256_add_epi32(a, b); }
+
+SIMD_INLINE v256 v256_add_64(v256 a, v256 b) { return _mm256_add_epi64(a, b); }
+
+SIMD_INLINE v256 v256_padd_u8(v256 a) {
+  return _mm256_maddubs_epi16(a, _mm256_set1_epi8(1));
+}
+
+SIMD_INLINE v256 v256_padd_s16(v256 a) {
+  return _mm256_madd_epi16(a, _mm256_set1_epi16(1));
+}
+
+SIMD_INLINE v256 v256_sub_8(v256 a, v256 b) { return _mm256_sub_epi8(a, b); }
+
+SIMD_INLINE v256 v256_ssub_u8(v256 a, v256 b) { return _mm256_subs_epu8(a, b); }
+
+SIMD_INLINE v256 v256_ssub_s8(v256 a, v256 b) { return _mm256_subs_epi8(a, b); }
+
+SIMD_INLINE v256 v256_sub_16(v256 a, v256 b) { return _mm256_sub_epi16(a, b); }
+
+SIMD_INLINE v256 v256_ssub_s16(v256 a, v256 b) {
+  return _mm256_subs_epi16(a, b);
+}
+
+SIMD_INLINE v256 v256_ssub_u16(v256 a, v256 b) {
+  return _mm256_subs_epu16(a, b);
+}
+
+SIMD_INLINE v256 v256_sub_32(v256 a, v256 b) { return _mm256_sub_epi32(a, b); }
+
+SIMD_INLINE v256 v256_sub_64(v256 a, v256 b) { return _mm256_sub_epi64(a, b); }
+
+SIMD_INLINE v256 v256_abs_s16(v256 a) { return _mm256_abs_epi16(a); }
+
+SIMD_INLINE v256 v256_abs_s8(v256 a) { return _mm256_abs_epi8(a); }
+
+// AVX doesn't have the direct intrinsics to zip/unzip 8, 16, 32 bit
+// lanes of lower or upper halves of a 256bit vector because the
+// unpack/pack intrinsics operate on the 256 bit input vector as 2
+// independent 128 bit vectors.
+SIMD_INLINE v256 v256_ziplo_8(v256 a, v256 b) {
+  return _mm256_unpacklo_epi8(
+      _mm256_permute4x64_epi64(b, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)));
+}
+
+SIMD_INLINE v256 v256_ziphi_8(v256 a, v256 b) {
+  return _mm256_unpackhi_epi8(
+      _mm256_permute4x64_epi64(b, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)));
+}
+
+SIMD_INLINE v256 v256_ziplo_16(v256 a, v256 b) {
+  return _mm256_unpacklo_epi16(
+      _mm256_permute4x64_epi64(b, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)));
+}
+
+SIMD_INLINE v256 v256_ziphi_16(v256 a, v256 b) {
+  return _mm256_unpackhi_epi16(
+      _mm256_permute4x64_epi64(b, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)));
+}
+
+SIMD_INLINE v256 v256_ziplo_32(v256 a, v256 b) {
+  return _mm256_unpacklo_epi32(
+      _mm256_permute4x64_epi64(b, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)));
+}
+
+SIMD_INLINE v256 v256_ziphi_32(v256 a, v256 b) {
+  return _mm256_unpackhi_epi32(
+      _mm256_permute4x64_epi64(b, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)));
+}
+
+SIMD_INLINE v256 v256_ziplo_64(v256 a, v256 b) {
+  return _mm256_unpacklo_epi64(
+      _mm256_permute4x64_epi64(b, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)));
+}
+
+SIMD_INLINE v256 v256_ziphi_64(v256 a, v256 b) {
+  return _mm256_unpackhi_epi64(
+      _mm256_permute4x64_epi64(b, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)));
+}
+
+SIMD_INLINE v256 v256_ziplo_128(v256 a, v256 b) {
+  return v256_from_v128(v256_low_v128(a), v256_low_v128(b));
+}
+
+SIMD_INLINE v256 v256_ziphi_128(v256 a, v256 b) {
+  return v256_from_v128(v256_high_v128(a), v256_high_v128(b));
+}
+
+SIMD_INLINE v256 v256_zip_8(v128 a, v128 b) {
+  return v256_from_v128(v128_ziphi_8(a, b), v128_ziplo_8(a, b));
+}
+
+SIMD_INLINE v256 v256_zip_16(v128 a, v128 b) {
+  return v256_from_v128(v128_ziphi_16(a, b), v128_ziplo_16(a, b));
+}
+
+SIMD_INLINE v256 v256_zip_32(v128 a, v128 b) {
+  return v256_from_v128(v128_ziphi_32(a, b), v128_ziplo_32(a, b));
+}
+
+SIMD_INLINE v256 v256_unziphi_8(v256 a, v256 b) {
+  return _mm256_permute4x64_epi64(
+      _mm256_packs_epi16(_mm256_srai_epi16(b, 8), _mm256_srai_epi16(a, 8)),
+      _MM_SHUFFLE(3, 1, 2, 0));
+}
+
+SIMD_INLINE v256 v256_unziplo_8(v256 a, v256 b) {
+  return v256_unziphi_8(_mm256_slli_si256(a, 1), _mm256_slli_si256(b, 1));
+}
+
+SIMD_INLINE v256 v256_unziphi_16(v256 a, v256 b) {
+  return _mm256_permute4x64_epi64(
+      _mm256_packs_epi32(_mm256_srai_epi32(b, 16), _mm256_srai_epi32(a, 16)),
+      _MM_SHUFFLE(3, 1, 2, 0));
+}
+
+SIMD_INLINE v256 v256_unziplo_16(v256 a, v256 b) {
+  return v256_unziphi_16(_mm256_slli_si256(a, 2), _mm256_slli_si256(b, 2));
+}
+
+SIMD_INLINE v256 v256_unziphi_32(v256 a, v256 b) {
+  return _mm256_permute4x64_epi64(
+      _mm256_castps_si256(_mm256_shuffle_ps(_mm256_castsi256_ps(b),
+                                            _mm256_castsi256_ps(a),
+                                            _MM_SHUFFLE(3, 1, 3, 1))),
+      _MM_SHUFFLE(3, 1, 2, 0));
+}
+
+SIMD_INLINE v256 v256_unziplo_32(v256 a, v256 b) {
+  return _mm256_permute4x64_epi64(
+      _mm256_castps_si256(_mm256_shuffle_ps(_mm256_castsi256_ps(b),
+                                            _mm256_castsi256_ps(a),
+                                            _MM_SHUFFLE(2, 0, 2, 0))),
+      _MM_SHUFFLE(3, 1, 2, 0));
+}
+
+SIMD_INLINE v256 v256_unziphi_64(v256 a, v256 b) {
+  return _mm256_permute4x64_epi64(
+      _mm256_castpd_si256(_mm256_shuffle_pd(_mm256_castsi256_pd(b),
+                                            _mm256_castsi256_pd(a), 15)),
+      _MM_SHUFFLE(3, 1, 2, 0));
+}
+
+SIMD_INLINE v256 v256_unziplo_64(v256 a, v256 b) {
+  return _mm256_permute4x64_epi64(
+      _mm256_castpd_si256(
+          _mm256_shuffle_pd(_mm256_castsi256_pd(b), _mm256_castsi256_pd(a), 0)),
+      _MM_SHUFFLE(3, 1, 2, 0));
+}
+
+SIMD_INLINE v256 v256_unpack_u8_s16(v128 a) {
+  return v256_from_v128(v128_unpackhi_u8_s16(a), v128_unpacklo_u8_s16(a));
+}
+
+SIMD_INLINE v256 v256_unpacklo_u8_s16(v256 a) {
+  return _mm256_unpacklo_epi8(
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_setzero_si256());
+}
+
+SIMD_INLINE v256 v256_unpackhi_u8_s16(v256 a) {
+  return _mm256_unpackhi_epi8(
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_setzero_si256());
+}
+
+SIMD_INLINE v256 v256_unpack_s8_s16(v128 a) {
+  return v256_from_v128(v128_unpackhi_s8_s16(a), v128_unpacklo_s8_s16(a));
+}
+
+SIMD_INLINE v256 v256_unpacklo_s8_s16(v256 a) {
+  return _mm256_srai_epi16(
+      _mm256_unpacklo_epi8(
+          a, _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0))),
+      8);
+}
+
+SIMD_INLINE v256 v256_unpackhi_s8_s16(v256 a) {
+  return _mm256_srai_epi16(
+      _mm256_unpackhi_epi8(
+          a, _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0))),
+      8);
+}
+
+SIMD_INLINE v256 v256_pack_s32_s16(v256 a, v256 b) {
+  return _mm256_permute4x64_epi64(_mm256_packs_epi32(b, a),
+                                  _MM_SHUFFLE(3, 1, 2, 0));
+}
+
+SIMD_INLINE v256 v256_pack_s32_u16(v256 a, v256 b) {
+  return _mm256_permute4x64_epi64(_mm256_packus_epi32(b, a),
+                                  _MM_SHUFFLE(3, 1, 2, 0));
+}
+
+SIMD_INLINE v256 v256_pack_s16_u8(v256 a, v256 b) {
+  return _mm256_permute4x64_epi64(_mm256_packus_epi16(b, a),
+                                  _MM_SHUFFLE(3, 1, 2, 0));
+}
+
+SIMD_INLINE v256 v256_pack_s16_s8(v256 a, v256 b) {
+  return _mm256_permute4x64_epi64(_mm256_packs_epi16(b, a),
+                                  _MM_SHUFFLE(3, 1, 2, 0));
+}
+
+SIMD_INLINE v256 v256_unpack_u16_s32(v128 a) {
+  return v256_from_v128(v128_unpackhi_u16_s32(a), v128_unpacklo_u16_s32(a));
+}
+
+SIMD_INLINE v256 v256_unpack_s16_s32(v128 a) {
+  return v256_from_v128(v128_unpackhi_s16_s32(a), v128_unpacklo_s16_s32(a));
+}
+
+SIMD_INLINE v256 v256_unpacklo_u16_s32(v256 a) {
+  return _mm256_unpacklo_epi16(
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_setzero_si256());
+}
+
+SIMD_INLINE v256 v256_unpacklo_s16_s32(v256 a) {
+  return _mm256_srai_epi32(
+      _mm256_unpacklo_epi16(
+          a, _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0))),
+      16);
+}
+
+SIMD_INLINE v256 v256_unpackhi_u16_s32(v256 a) {
+  return _mm256_unpackhi_epi16(
+      _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0)),
+      _mm256_setzero_si256());
+}
+
+SIMD_INLINE v256 v256_unpackhi_s16_s32(v256 a) {
+  return _mm256_srai_epi32(
+      _mm256_unpackhi_epi16(
+          a, _mm256_permute4x64_epi64(a, _MM_SHUFFLE(3, 1, 2, 0))),
+      16);
+}
+
+SIMD_INLINE v256 v256_shuffle_8(v256 a, v256 pattern) {
+  return _mm256_blendv_epi8(
+      _mm256_shuffle_epi8(
+          _mm256_permute2x128_si256(a, a, _MM_SHUFFLE(0, 1, 0, 1)), pattern),
+      _mm256_shuffle_epi8(
+          _mm256_permute2x128_si256(a, a, _MM_SHUFFLE(0, 0, 0, 0)), pattern),
+      _mm256_cmpgt_epi8(v256_dup_8(16), pattern));
+}
+
+SIMD_INLINE v256 v256_wideshuffle_8(v256 a, v256 b, v256 pattern) {
+  v256 c32 = v256_dup_8(32);
+  v256 p32 = v256_sub_8(pattern, c32);
+  v256 r1 = _mm256_blendv_epi8(
+      _mm256_shuffle_epi8(
+          _mm256_permute2x128_si256(a, b, _MM_SHUFFLE(0, 1, 0, 1)), p32),
+      _mm256_shuffle_epi8(
+          _mm256_permute2x128_si256(a, b, _MM_SHUFFLE(0, 0, 0, 0)), p32),
+      _mm256_cmpgt_epi8(v256_dup_8(48), pattern));
+  v256 r2 = _mm256_blendv_epi8(
+      _mm256_shuffle_epi8(
+          _mm256_permute2x128_si256(a, b, _MM_SHUFFLE(0, 3, 0, 3)), pattern),
+      _mm256_shuffle_epi8(
+          _mm256_permute2x128_si256(a, b, _MM_SHUFFLE(0, 2, 0, 2)), pattern),
+      _mm256_cmpgt_epi8(v256_dup_8(16), pattern));
+  return _mm256_blendv_epi8(r1, r2, _mm256_cmpgt_epi8(c32, pattern));
+}
+
+SIMD_INLINE v256 v256_pshuffle_8(v256 a, v256 pattern) {
+  return _mm256_shuffle_epi8(a, pattern);
+}
+
+SIMD_INLINE int64_t v256_dotp_su8(v256 a, v256 b) {
+  v256 t1 = _mm256_madd_epi16(v256_unpackhi_s8_s16(a), v256_unpackhi_u8_s16(b));
+  v256 t2 = _mm256_madd_epi16(v256_unpacklo_s8_s16(a), v256_unpacklo_u8_s16(b));
+  t1 = _mm256_add_epi32(t1, t2);
+  v128 t = _mm_add_epi32(_mm256_extracti128_si256(t1, 0),
+                         _mm256_extracti128_si256(t1, 1));
+  t = _mm_add_epi32(t, _mm_srli_si128(t, 8));
+  t = _mm_add_epi32(t, _mm_srli_si128(t, 4));
+  return (int32_t)v128_low_u32(t);
+}
+
+SIMD_INLINE int64_t v256_dotp_s16(v256 a, v256 b) {
+  v256 r = _mm256_madd_epi16(a, b);
+#if defined(__x86_64__)
+  v128 t;
+  r = _mm256_add_epi64(_mm256_cvtepi32_epi64(v256_high_v128(r)),
+                       _mm256_cvtepi32_epi64(v256_low_v128(r)));
+  t = v256_low_v128(_mm256_add_epi64(
+      r, _mm256_permute2x128_si256(r, r, _MM_SHUFFLE(2, 0, 0, 1))));
+  return _mm_cvtsi128_si64(_mm_add_epi64(t, _mm_srli_si128(t, 8)));
+#else
+  v128 l = v256_low_v128(r);
+  v128 h = v256_high_v128(r);
+  return (int64_t)_mm_cvtsi128_si32(l) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(l, 4)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(l, 8)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(l, 12)) +
+         (int64_t)_mm_cvtsi128_si32(h) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(h, 4)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(h, 8)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(h, 12));
+#endif
+}
+
+SIMD_INLINE int64_t v256_dotp_s32(v256 a, v256 b) {
+  v256 r = _mm256_mullo_epi32(a, b);
+#if defined(__x86_64__)
+  v128 t;
+  r = _mm256_add_epi64(_mm256_cvtepi32_epi64(v256_high_v128(r)),
+                       _mm256_cvtepi32_epi64(v256_low_v128(r)));
+  t = v256_low_v128(_mm256_add_epi64(
+      r, _mm256_permute2x128_si256(r, r, _MM_SHUFFLE(2, 0, 0, 1))));
+  return _mm_cvtsi128_si64(_mm_add_epi64(t, _mm_srli_si128(t, 8)));
+#else
+  v128 l = v256_low_v128(r);
+  v128 h = v256_high_v128(r);
+  return (int64_t)_mm_cvtsi128_si32(l) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(l, 4)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(l, 8)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(l, 12)) +
+         (int64_t)_mm_cvtsi128_si32(h) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(h, 4)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(h, 8)) +
+         (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(h, 12));
+#endif
+}
+
+SIMD_INLINE uint64_t v256_hadd_u8(v256 a) {
+  v256 t = _mm256_sad_epu8(a, _mm256_setzero_si256());
+  v128 lo = v256_low_v128(t);
+  v128 hi = v256_high_v128(t);
+  lo = v128_add_32(lo, hi);
+  return v64_low_u32(v128_low_v64(lo)) + v128_low_u32(v128_high_v64(lo));
+}
+
+typedef v256 sad256_internal;
+
+SIMD_INLINE sad256_internal v256_sad_u8_init() {
+  return _mm256_setzero_si256();
+}
+
+/* Implementation dependent return value.  Result must be finalised with
+   v256_sad_u8_sum().
+   The result for more than 32 v256_sad_u8() calls is undefined. */
+SIMD_INLINE sad256_internal v256_sad_u8(sad256_internal s, v256 a, v256 b) {
+  return _mm256_add_epi64(s, _mm256_sad_epu8(a, b));
+}
+
+SIMD_INLINE uint32_t v256_sad_u8_sum(sad256_internal s) {
+  v256 t = _mm256_add_epi32(s, _mm256_unpackhi_epi64(s, s));
+  return v128_low_u32(_mm_add_epi32(v256_high_v128(t), v256_low_v128(t)));
+}
+
+typedef v256 ssd256_internal;
+
+SIMD_INLINE ssd256_internal v256_ssd_u8_init() {
+  return _mm256_setzero_si256();
+}
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v256_ssd_u8_sum(). */
+SIMD_INLINE ssd256_internal v256_ssd_u8(ssd256_internal s, v256 a, v256 b) {
+  v256 l = _mm256_sub_epi16(_mm256_unpacklo_epi8(a, _mm256_setzero_si256()),
+                            _mm256_unpacklo_epi8(b, _mm256_setzero_si256()));
+  v256 h = _mm256_sub_epi16(_mm256_unpackhi_epi8(a, _mm256_setzero_si256()),
+                            _mm256_unpackhi_epi8(b, _mm256_setzero_si256()));
+  v256 rl = _mm256_madd_epi16(l, l);
+  v256 rh = _mm256_madd_epi16(h, h);
+  v128 c = _mm_cvtsi32_si128(32);
+  rl = _mm256_add_epi32(rl, _mm256_srli_si256(rl, 8));
+  rl = _mm256_add_epi32(rl, _mm256_srli_si256(rl, 4));
+  rh = _mm256_add_epi32(rh, _mm256_srli_si256(rh, 8));
+  rh = _mm256_add_epi32(rh, _mm256_srli_si256(rh, 4));
+  return _mm256_add_epi64(
+      s,
+      _mm256_srl_epi64(_mm256_sll_epi64(_mm256_unpacklo_epi64(rl, rh), c), c));
+}
+
+SIMD_INLINE uint32_t v256_ssd_u8_sum(ssd256_internal s) {
+  v256 t = _mm256_add_epi32(s, _mm256_unpackhi_epi64(s, s));
+  return v128_low_u32(_mm_add_epi32(v256_high_v128(t), v256_low_v128(t)));
+}
+
+SIMD_INLINE v256 v256_or(v256 a, v256 b) { return _mm256_or_si256(a, b); }
+
+SIMD_INLINE v256 v256_xor(v256 a, v256 b) { return _mm256_xor_si256(a, b); }
+
+SIMD_INLINE v256 v256_and(v256 a, v256 b) { return _mm256_and_si256(a, b); }
+
+SIMD_INLINE v256 v256_andn(v256 a, v256 b) { return _mm256_andnot_si256(b, a); }
+
+SIMD_INLINE v256 v256_mul_s16(v64 a, v64 b) {
+  v128 lo_bits = v128_mullo_s16(a, b);
+  v128 hi_bits = v128_mulhi_s16(a, b);
+  return v256_from_v128(v128_ziphi_16(hi_bits, lo_bits),
+                        v128_ziplo_16(hi_bits, lo_bits));
+}
+
+SIMD_INLINE v256 v256_mullo_s16(v256 a, v256 b) {
+  return _mm256_mullo_epi16(a, b);
+}
+
+SIMD_INLINE v256 v256_mulhi_s16(v256 a, v256 b) {
+  return _mm256_mulhi_epi16(a, b);
+}
+
+SIMD_INLINE v256 v256_mullo_s32(v256 a, v256 b) {
+  return _mm256_mullo_epi32(a, b);
+}
+
+SIMD_INLINE v256 v256_madd_s16(v256 a, v256 b) {
+  return _mm256_madd_epi16(a, b);
+}
+
+SIMD_INLINE v256 v256_madd_us8(v256 a, v256 b) {
+  return _mm256_maddubs_epi16(a, b);
+}
+
+SIMD_INLINE v256 v256_avg_u8(v256 a, v256 b) { return _mm256_avg_epu8(a, b); }
+
+SIMD_INLINE v256 v256_rdavg_u8(v256 a, v256 b) {
+  return _mm256_sub_epi8(
+      _mm256_avg_epu8(a, b),
+      _mm256_and_si256(_mm256_xor_si256(a, b), v256_dup_8(1)));
+}
+
+SIMD_INLINE v256 v256_rdavg_u16(v256 a, v256 b) {
+  return _mm256_sub_epi16(
+      _mm256_avg_epu16(a, b),
+      _mm256_and_si256(_mm256_xor_si256(a, b), v256_dup_16(1)));
+}
+
+SIMD_INLINE v256 v256_avg_u16(v256 a, v256 b) { return _mm256_avg_epu16(a, b); }
+
+SIMD_INLINE v256 v256_min_u8(v256 a, v256 b) { return _mm256_min_epu8(a, b); }
+
+SIMD_INLINE v256 v256_max_u8(v256 a, v256 b) { return _mm256_max_epu8(a, b); }
+
+SIMD_INLINE v256 v256_min_s8(v256 a, v256 b) { return _mm256_min_epi8(a, b); }
+
+SIMD_INLINE uint32_t v256_movemask_8(v256 a) { return _mm256_movemask_epi8(a); }
+
+SIMD_INLINE v256 v256_blend_8(v256 a, v256 b, v256 c) {
+  return _mm256_blendv_epi8(a, b, c);
+}
+
+SIMD_INLINE v256 v256_max_s8(v256 a, v256 b) { return _mm256_max_epi8(a, b); }
+
+SIMD_INLINE v256 v256_min_s16(v256 a, v256 b) { return _mm256_min_epi16(a, b); }
+
+SIMD_INLINE v256 v256_max_s16(v256 a, v256 b) { return _mm256_max_epi16(a, b); }
+
+SIMD_INLINE v256 v256_min_s32(v256 a, v256 b) { return _mm256_min_epi32(a, b); }
+
+SIMD_INLINE v256 v256_max_s32(v256 a, v256 b) { return _mm256_max_epi32(a, b); }
+
+SIMD_INLINE v256 v256_cmpgt_s8(v256 a, v256 b) {
+  return _mm256_cmpgt_epi8(a, b);
+}
+
+SIMD_INLINE v256 v256_cmplt_s8(v256 a, v256 b) {
+  return _mm256_cmpgt_epi8(b, a);
+}
+
+SIMD_INLINE v256 v256_cmpeq_8(v256 a, v256 b) {
+  return _mm256_cmpeq_epi8(a, b);
+}
+
+SIMD_INLINE v256 v256_cmpgt_s16(v256 a, v256 b) {
+  return _mm256_cmpgt_epi16(a, b);
+}
+
+SIMD_INLINE v256 v256_cmplt_s16(v256 a, v256 b) {
+  return _mm256_cmpgt_epi16(b, a);
+}
+
+SIMD_INLINE v256 v256_cmpeq_16(v256 a, v256 b) {
+  return _mm256_cmpeq_epi16(a, b);
+}
+
+SIMD_INLINE v256 v256_cmpgt_s32(v256 a, v256 b) {
+  return _mm256_cmpgt_epi32(a, b);
+}
+
+SIMD_INLINE v256 v256_cmplt_s32(v256 a, v256 b) {
+  return _mm256_cmpgt_epi32(b, a);
+}
+
+SIMD_INLINE v256 v256_cmpeq_32(v256 a, v256 b) {
+  return _mm256_cmpeq_epi32(a, b);
+}
+
+SIMD_INLINE v256 v256_shl_8(v256 a, unsigned int c) {
+  return _mm256_and_si256(_mm256_set1_epi8((uint8_t)(0xff << c)),
+                          _mm256_sll_epi16(a, _mm_cvtsi32_si128(c)));
+}
+
+SIMD_INLINE v256 v256_shr_u8(v256 a, unsigned int c) {
+  return _mm256_and_si256(_mm256_set1_epi8(0xff >> c),
+                          _mm256_srl_epi16(a, _mm_cvtsi32_si128(c)));
+}
+
+SIMD_INLINE v256 v256_shr_s8(v256 a, unsigned int c) {
+  __m128i x = _mm_cvtsi32_si128(c + 8);
+  return _mm256_packs_epi16(_mm256_sra_epi16(_mm256_unpacklo_epi8(a, a), x),
+                            _mm256_sra_epi16(_mm256_unpackhi_epi8(a, a), x));
+}
+
+SIMD_INLINE v256 v256_shl_16(v256 a, unsigned int c) {
+  return _mm256_sll_epi16(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v256 v256_shr_u16(v256 a, unsigned int c) {
+  return _mm256_srl_epi16(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v256 v256_shr_s16(v256 a, unsigned int c) {
+  return _mm256_sra_epi16(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v256 v256_shl_32(v256 a, unsigned int c) {
+  return _mm256_sll_epi32(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v256 v256_shr_u32(v256 a, unsigned int c) {
+  return _mm256_srl_epi32(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v256 v256_shr_s32(v256 a, unsigned int c) {
+  return _mm256_sra_epi32(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v256 v256_shl_64(v256 a, unsigned int c) {
+  return _mm256_sll_epi64(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v256 v256_shr_u64(v256 a, unsigned int c) {
+  return _mm256_srl_epi64(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v256 v256_shr_s64(v256 a, unsigned int c) {
+#if defined(__AVX512F__)
+  return _mm256_sra_epi64(a, _mm_cvtsi32_si128(c));
+#else
+  return v256_from_v128(v128_shr_s64(v256_high_v128(a), c),
+                        v128_shr_s64(v256_low_v128(a), c));
+#endif
+}
+
+/* These intrinsics require immediate values, so we must use #defines
+   to enforce that. */
+// _mm256_slli_si256 works on 128 bit lanes and can't be used
+#define v256_shl_n_byte(a, n)                                                \
+  ((n) < 16 ? v256_from_v128(                                                \
+                  v128_align(v256_high_v128(a), v256_low_v128(a), 16 - (n)), \
+                  v128_shl_n_byte(v256_low_v128(a), n))                      \
+            : _mm256_inserti128_si256(                                       \
+                  _mm256_setzero_si256(),                                    \
+                  v128_shl_n_byte(v256_low_v128(a), (n)-16), 1))
+
+// _mm256_srli_si256 works on 128 bit lanes and can't be used
+#define v256_shr_n_byte(a, n)                                                \
+  ((n) < 16                                                                  \
+       ? _mm256_alignr_epi8(                                                 \
+             _mm256_permute2x128_si256(a, a, _MM_SHUFFLE(2, 0, 0, 1)), a, n) \
+       : _mm256_inserti128_si256(                                            \
+             _mm256_setzero_si256(),                                         \
+             v128_align(v256_high_v128(a), v256_high_v128(a), n), 0))
+
+// _mm256_alignr_epi8 works on two 128 bit lanes and can't be used
+#define v256_align(a, b, c) \
+  ((c) ? v256_or(v256_shr_n_byte(b, c), v256_shl_n_byte(a, 32 - c)) : b)
+
+#define v256_shl_n_8(a, c)                                   \
+  _mm256_and_si256(_mm256_set1_epi8((uint8_t)(0xff << (c))), \
+                   _mm256_slli_epi16(a, c))
+#define v256_shr_n_u8(a, c) \
+  _mm256_and_si256(_mm256_set1_epi8(0xff >> (c)), _mm256_srli_epi16(a, c))
+#define v256_shr_n_s8(a, c)                                                  \
+  _mm256_packs_epi16(_mm256_srai_epi16(_mm256_unpacklo_epi8(a, a), (c) + 8), \
+                     _mm256_srai_epi16(_mm256_unpackhi_epi8(a, a), (c) + 8))
+#define v256_shl_n_16(a, c) _mm256_slli_epi16(a, c)
+#define v256_shr_n_u16(a, c) _mm256_srli_epi16(a, c)
+#define v256_shr_n_s16(a, c) _mm256_srai_epi16(a, c)
+#define v256_shl_n_32(a, c) _mm256_slli_epi32(a, c)
+#define v256_shr_n_u32(a, c) _mm256_srli_epi32(a, c)
+#define v256_shr_n_s32(a, c) _mm256_srai_epi32(a, c)
+#define v256_shl_n_64(a, c) _mm256_slli_epi64(a, c)
+#define v256_shr_n_u64(a, c) _mm256_srli_epi64(a, c)
+#define v256_shr_n_s64(a, c) \
+  v256_shr_s64((a), (c))  // _mm256_srai_epi64 broken in gcc?
+#define v256_shr_n_word(a, n) v256_shr_n_byte(a, 2 * (n))
+#define v256_shl_n_word(a, n) v256_shl_n_byte(a, 2 * (n))
+
+typedef v256 sad256_internal_u16;
+
+SIMD_INLINE sad256_internal_u16 v256_sad_u16_init() { return v256_zero(); }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v256_sad_u16_sum(). */
+SIMD_INLINE sad256_internal_u16 v256_sad_u16(sad256_internal_u16 s, v256 a,
+                                             v256 b) {
+#if defined(__SSE4_1__)
+  v256 t = v256_sub_16(_mm256_max_epu16(a, b), _mm256_min_epu16(a, b));
+#else
+  v256 t = v256_cmplt_s16(v256_xor(a, v256_dup_16(32768)),
+                          v256_xor(b, v256_dup_16(32768)));
+  t = v256_sub_16(v256_or(v256_and(b, t), v256_andn(a, t)),
+                  v256_or(v256_and(a, t), v256_andn(b, t)));
+#endif
+  return v256_add_32(
+      s, v256_add_32(v256_unpackhi_u16_s32(t), v256_unpacklo_u16_s32(t)));
+}
+
+SIMD_INLINE uint32_t v256_sad_u16_sum(sad256_internal_u16 s) {
+  v128 t = v128_add_32(v256_high_v128(s), v256_low_v128(s));
+  return v128_low_u32(t) + v128_low_u32(v128_shr_n_byte(t, 4)) +
+         v128_low_u32(v128_shr_n_byte(t, 8)) +
+         v128_low_u32(v128_shr_n_byte(t, 12));
+}
+
+typedef v256 ssd256_internal_s16;
+
+SIMD_INLINE ssd256_internal_s16 v256_ssd_s16_init() { return v256_zero(); }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v256_ssd_s16_sum(). */
+SIMD_INLINE ssd256_internal_s16 v256_ssd_s16(ssd256_internal_s16 s, v256 a,
+                                             v256 b) {
+  v256 d = v256_sub_16(a, b);
+  d = v256_madd_s16(d, d);
+  return v256_add_64(s, v256_add_64(_mm256_unpackhi_epi32(d, v256_zero()),
+                                    _mm256_unpacklo_epi32(d, v256_zero())));
+}
+
+SIMD_INLINE uint64_t v256_ssd_s16_sum(ssd256_internal_s16 s) {
+  v128 t = v128_add_64(v256_high_v128(s), v256_low_v128(s));
+  return v64_u64(v128_low_v64(t)) + v64_u64(v128_high_v64(t));
+}
+
+#endif
+
+#endif  // AOM_AOM_DSP_SIMD_V256_INTRINSICS_X86_H_
diff --git a/third_party/aom/aom_dsp/simd/v64_intrinsics.h b/third_party/aom/aom_dsp/simd/v64_intrinsics.h
new file mode 100644
index 0000000000..afc55428d8
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v64_intrinsics.h
@@ -0,0 +1,232 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V64_INTRINSICS_H_
+#define AOM_AOM_DSP_SIMD_V64_INTRINSICS_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "aom_dsp/simd/v64_intrinsics_c.h"
+
+/* Fallback to plain, unoptimised C. */
+
+typedef c_v64 v64;
+
+SIMD_INLINE uint32_t v64_low_u32(v64 a) { return c_v64_low_u32(a); }
+SIMD_INLINE uint32_t v64_high_u32(v64 a) { return c_v64_high_u32(a); }
+SIMD_INLINE int32_t v64_low_s32(v64 a) { return c_v64_low_s32(a); }
+SIMD_INLINE int32_t v64_high_s32(v64 a) { return c_v64_high_s32(a); }
+SIMD_INLINE v64 v64_from_32(uint32_t x, uint32_t y) {
+  return c_v64_from_32(x, y);
+}
+SIMD_INLINE v64 v64_from_64(uint64_t x) { return c_v64_from_64(x); }
+SIMD_INLINE uint64_t v64_u64(v64 x) { return c_v64_u64(x); }
+SIMD_INLINE v64 v64_from_16(uint16_t a, uint16_t b, uint16_t c, uint16_t d) {
+  return c_v64_from_16(a, b, c, d);
+}
+
+SIMD_INLINE uint32_t u32_load_unaligned(const void *p) {
+  return c_u32_load_unaligned(p);
+}
+SIMD_INLINE uint32_t u32_load_aligned(const void *p) {
+  return c_u32_load_aligned(p);
+}
+SIMD_INLINE void u32_store_unaligned(void *p, uint32_t a) {
+  c_u32_store_unaligned(p, a);
+}
+SIMD_INLINE void u32_store_aligned(void *p, uint32_t a) {
+  c_u32_store_aligned(p, a);
+}
+
+SIMD_INLINE v64 v64_load_unaligned(const void *p) {
+  return c_v64_load_unaligned(p);
+}
+SIMD_INLINE v64 v64_load_aligned(const void *p) {
+  return c_v64_load_aligned(p);
+}
+
+SIMD_INLINE void v64_store_unaligned(void *p, v64 a) {
+  c_v64_store_unaligned(p, a);
+}
+SIMD_INLINE void v64_store_aligned(void *p, v64 a) {
+  c_v64_store_aligned(p, a);
+}
+
+SIMD_INLINE v64 v64_align(v64 a, v64 b, unsigned int c) {
+  return c_v64_align(a, b, c);
+}
+
+SIMD_INLINE v64 v64_zero() { return c_v64_zero(); }
+SIMD_INLINE v64 v64_dup_8(uint8_t x) { return c_v64_dup_8(x); }
+SIMD_INLINE v64 v64_dup_16(uint16_t x) { return c_v64_dup_16(x); }
+SIMD_INLINE v64 v64_dup_32(uint32_t x) { return c_v64_dup_32(x); }
+
+SIMD_INLINE v64 v64_add_8(v64 a, v64 b) { return c_v64_add_8(a, b); }
+SIMD_INLINE v64 v64_add_16(v64 a, v64 b) { return c_v64_add_16(a, b); }
+SIMD_INLINE v64 v64_sadd_u8(v64 a, v64 b) { return c_v64_sadd_u8(a, b); }
+SIMD_INLINE v64 v64_sadd_s8(v64 a, v64 b) { return c_v64_sadd_s8(a, b); }
+SIMD_INLINE v64 v64_sadd_s16(v64 a, v64 b) { return c_v64_sadd_s16(a, b); }
+SIMD_INLINE v64 v64_add_32(v64 a, v64 b) { return c_v64_add_32(a, b); }
+SIMD_INLINE v64 v64_sub_8(v64 a, v64 b) { return c_v64_sub_8(a, b); }
+SIMD_INLINE v64 v64_ssub_u8(v64 a, v64 b) { return c_v64_ssub_u8(a, b); }
+SIMD_INLINE v64 v64_ssub_s8(v64 a, v64 b) { return c_v64_ssub_s8(a, b); }
+SIMD_INLINE v64 v64_sub_16(v64 a, v64 b) { return c_v64_sub_16(a, b); }
+SIMD_INLINE v64 v64_ssub_s16(v64 a, v64 b) { return c_v64_ssub_s16(a, b); }
+SIMD_INLINE v64 v64_ssub_u16(v64 a, v64 b) { return c_v64_ssub_u16(a, b); }
+SIMD_INLINE v64 v64_sub_32(v64 a, v64 b) { return c_v64_sub_32(a, b); }
+SIMD_INLINE v64 v64_abs_s16(v64 a) { return c_v64_abs_s16(a); }
+SIMD_INLINE v64 v64_abs_s8(v64 a) { return c_v64_abs_s8(a); }
+
+SIMD_INLINE v64 v64_ziplo_8(v64 a, v64 b) { return c_v64_ziplo_8(a, b); }
+SIMD_INLINE v64 v64_ziphi_8(v64 a, v64 b) { return c_v64_ziphi_8(a, b); }
+SIMD_INLINE v64 v64_ziplo_16(v64 a, v64 b) { return c_v64_ziplo_16(a, b); }
+SIMD_INLINE v64 v64_ziphi_16(v64 a, v64 b) { return c_v64_ziphi_16(a, b); }
+SIMD_INLINE v64 v64_ziplo_32(v64 a, v64 b) { return c_v64_ziplo_32(a, b); }
+SIMD_INLINE v64 v64_ziphi_32(v64 a, v64 b) { return c_v64_ziphi_32(a, b); }
+SIMD_INLINE v64 v64_unziplo_8(v64 a, v64 b) { return c_v64_unziplo_8(a, b); }
+SIMD_INLINE v64 v64_unziphi_8(v64 a, v64 b) { return c_v64_unziphi_8(a, b); }
+SIMD_INLINE v64 v64_unziplo_16(v64 a, v64 b) { return c_v64_unziplo_16(a, b); }
+SIMD_INLINE v64 v64_unziphi_16(v64 a, v64 b) { return c_v64_unziphi_16(a, b); }
+SIMD_INLINE v64 v64_unpacklo_u8_s16(v64 a) { return c_v64_unpacklo_u8_s16(a); }
+SIMD_INLINE v64 v64_unpackhi_u8_s16(v64 a) { return c_v64_unpackhi_u8_s16(a); }
+SIMD_INLINE v64 v64_unpacklo_s8_s16(v64 a) { return c_v64_unpacklo_s8_s16(a); }
+SIMD_INLINE v64 v64_unpackhi_s8_s16(v64 a) { return c_v64_unpackhi_s8_s16(a); }
+SIMD_INLINE v64 v64_pack_s32_s16(v64 a, v64 b) {
+  return c_v64_pack_s32_s16(a, b);
+}
+SIMD_INLINE v64 v64_pack_s32_u16(v64 a, v64 b) {
+  return c_v64_pack_s32_u16(a, b);
+}
+SIMD_INLINE v64 v64_pack_s16_u8(v64 a, v64 b) {
+  return c_v64_pack_s16_u8(a, b);
+}
+SIMD_INLINE v64 v64_pack_s16_s8(v64 a, v64 b) {
+  return c_v64_pack_s16_s8(a, b);
+}
+SIMD_INLINE v64 v64_unpacklo_u16_s32(v64 a) {
+  return c_v64_unpacklo_u16_s32(a);
+}
+SIMD_INLINE v64 v64_unpacklo_s16_s32(v64 a) {
+  return c_v64_unpacklo_s16_s32(a);
+}
+SIMD_INLINE v64 v64_unpackhi_u16_s32(v64 a) {
+  return c_v64_unpackhi_u16_s32(a);
+}
+SIMD_INLINE v64 v64_unpackhi_s16_s32(v64 a) {
+  return c_v64_unpackhi_s16_s32(a);
+}
+SIMD_INLINE v64 v64_shuffle_8(v64 a, v64 pattern) {
+  return c_v64_shuffle_8(a, pattern);
+}
+
+typedef uint32_t sad64_internal;
+SIMD_INLINE sad64_internal v64_sad_u8_init() { return c_v64_sad_u8_init(); }
+SIMD_INLINE sad64_internal v64_sad_u8(sad64_internal s, v64 a, v64 b) {
+  return c_v64_sad_u8(s, a, b);
+}
+SIMD_INLINE uint32_t v64_sad_u8_sum(sad64_internal s) {
+  return c_v64_sad_u8_sum(s);
+}
+typedef uint32_t ssd64_internal;
+SIMD_INLINE ssd64_internal v64_ssd_u8_init() { return c_v64_ssd_u8_init(); }
+SIMD_INLINE ssd64_internal v64_ssd_u8(ssd64_internal s, v64 a, v64 b) {
+  return c_v64_ssd_u8(s, a, b);
+}
+SIMD_INLINE uint32_t v64_ssd_u8_sum(ssd64_internal s) {
+  return c_v64_ssd_u8_sum(s);
+}
+SIMD_INLINE int64_t v64_dotp_su8(v64 a, v64 b) { return c_v64_dotp_su8(a, b); }
+SIMD_INLINE int64_t v64_dotp_s16(v64 a, v64 b) { return c_v64_dotp_s16(a, b); }
+SIMD_INLINE uint64_t v64_hadd_u8(v64 a) { return c_v64_hadd_u8(a); }
+SIMD_INLINE int64_t v64_hadd_s16(v64 a) { return c_v64_hadd_s16(a); }
+
+SIMD_INLINE v64 v64_or(v64 a, v64 b) { return c_v64_or(a, b); }
+SIMD_INLINE v64 v64_xor(v64 a, v64 b) { return c_v64_xor(a, b); }
+SIMD_INLINE v64 v64_and(v64 a, v64 b) { return c_v64_and(a, b); }
+SIMD_INLINE v64 v64_andn(v64 a, v64 b) { return c_v64_andn(a, b); }
+
+SIMD_INLINE v64 v64_mullo_s16(v64 a, v64 b) { return c_v64_mullo_s16(a, b); }
+SIMD_INLINE v64 v64_mulhi_s16(v64 a, v64 b) { return c_v64_mulhi_s16(a, b); }
+SIMD_INLINE v64 v64_mullo_s32(v64 a, v64 b) { return c_v64_mullo_s32(a, b); }
+SIMD_INLINE v64 v64_madd_s16(v64 a, v64 b) { return c_v64_madd_s16(a, b); }
+SIMD_INLINE v64 v64_madd_us8(v64 a, v64 b) { return c_v64_madd_us8(a, b); }
+
+SIMD_INLINE v64 v64_avg_u8(v64 a, v64 b) { return c_v64_avg_u8(a, b); }
+SIMD_INLINE v64 v64_rdavg_u8(v64 a, v64 b) { return c_v64_rdavg_u8(a, b); }
+SIMD_INLINE v64 v64_rdavg_u16(v64 a, v64 b) { return c_v64_rdavg_u16(a, b); }
+SIMD_INLINE v64 v64_avg_u16(v64 a, v64 b) { return c_v64_avg_u16(a, b); }
+SIMD_INLINE v64 v64_min_u8(v64 a, v64 b) { return c_v64_min_u8(a, b); }
+SIMD_INLINE v64 v64_max_u8(v64 a, v64 b) { return c_v64_max_u8(a, b); }
+SIMD_INLINE v64 v64_min_s8(v64 a, v64 b) { return c_v64_min_s8(a, b); }
+SIMD_INLINE v64 v64_max_s8(v64 a, v64 b) { return c_v64_max_s8(a, b); }
+SIMD_INLINE v64 v64_min_s16(v64 a, v64 b) { return c_v64_min_s16(a, b); }
+SIMD_INLINE v64 v64_max_s16(v64 a, v64 b) { return c_v64_max_s16(a, b); }
+
+SIMD_INLINE v64 v64_cmpgt_s8(v64 a, v64 b) { return c_v64_cmpgt_s8(a, b); }
+SIMD_INLINE v64 v64_cmplt_s8(v64 a, v64 b) { return c_v64_cmplt_s8(a, b); }
+SIMD_INLINE v64 v64_cmpeq_8(v64 a, v64 b) { return c_v64_cmpeq_8(a, b); }
+SIMD_INLINE v64 v64_cmpgt_s16(v64 a, v64 b) { return c_v64_cmpgt_s16(a, b); }
+SIMD_INLINE v64 v64_cmplt_s16(v64 a, v64 b) { return c_v64_cmplt_s16(a, b); }
+SIMD_INLINE v64 v64_cmpeq_16(v64 a, v64 b) { return c_v64_cmpeq_16(a, b); }
+
+SIMD_INLINE v64 v64_shl_8(v64 a, unsigned int n) { return c_v64_shl_8(a, n); }
+SIMD_INLINE v64 v64_shr_u8(v64 a, unsigned int n) { return c_v64_shr_u8(a, n); }
+SIMD_INLINE v64 v64_shr_s8(v64 a, unsigned int n) { return c_v64_shr_s8(a, n); }
+SIMD_INLINE v64 v64_shl_16(v64 a, unsigned int n) { return c_v64_shl_16(a, n); }
+SIMD_INLINE v64 v64_shr_u16(v64 a, unsigned int n) {
+  return c_v64_shr_u16(a, n);
+}
+SIMD_INLINE v64 v64_shr_s16(v64 a, unsigned int n) {
+  return c_v64_shr_s16(a, n);
+}
+SIMD_INLINE v64 v64_shl_32(v64 a, unsigned int n) { return c_v64_shl_32(a, n); }
+SIMD_INLINE v64 v64_shr_u32(v64 a, unsigned int n) {
+  return c_v64_shr_u32(a, n);
+}
+SIMD_INLINE v64 v64_shr_s32(v64 a, unsigned int n) {
+  return c_v64_shr_s32(a, n);
+}
+SIMD_INLINE v64 v64_shr_n_byte(v64 a, unsigned int n) {
+  return c_v64_shr_n_byte(a, n);
+}
+SIMD_INLINE v64 v64_shl_n_byte(v64 a, unsigned int n) {
+  return c_v64_shl_n_byte(a, n);
+}
+SIMD_INLINE v64 v64_shl_n_8(v64 a, unsigned int c) {
+  return c_v64_shl_n_8(a, c);
+}
+SIMD_INLINE v64 v64_shr_n_u8(v64 a, unsigned int c) {
+  return c_v64_shr_n_u8(a, c);
+}
+SIMD_INLINE v64 v64_shr_n_s8(v64 a, unsigned int c) {
+  return c_v64_shr_n_s8(a, c);
+}
+SIMD_INLINE v64 v64_shl_n_16(v64 a, unsigned int c) {
+  return c_v64_shl_n_16(a, c);
+}
+SIMD_INLINE v64 v64_shr_n_u16(v64 a, unsigned int c) {
+  return c_v64_shr_n_u16(a, c);
+}
+SIMD_INLINE v64 v64_shr_n_s16(v64 a, unsigned int c) {
+  return c_v64_shr_n_s16(a, c);
+}
+SIMD_INLINE v64 v64_shl_n_32(v64 a, unsigned int c) {
+  return c_v64_shl_n_32(a, c);
+}
+SIMD_INLINE v64 v64_shr_n_u32(v64 a, unsigned int c) {
+  return c_v64_shr_n_u32(a, c);
+}
+SIMD_INLINE v64 v64_shr_n_s32(v64 a, unsigned int c) {
+  return c_v64_shr_n_s32(a, c);
+}
+
+#endif  // AOM_AOM_DSP_SIMD_V64_INTRINSICS_H_
diff --git a/third_party/aom/aom_dsp/simd/v64_intrinsics_arm.h b/third_party/aom/aom_dsp/simd/v64_intrinsics_arm.h
new file mode 100644
index 0000000000..8f39ad6e81
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v64_intrinsics_arm.h
@@ -0,0 +1,680 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V64_INTRINSICS_ARM_H_
+#define AOM_AOM_DSP_SIMD_V64_INTRINSICS_ARM_H_
+
+#include <arm_neon.h>
+
+#include "aom_dsp/simd/v64_intrinsics_arm.h"
+#include "aom_ports/arm.h"
+
+#ifdef AOM_INCOMPATIBLE_GCC
+#error Incompatible gcc
+#endif
+
+typedef int64x1_t v64;
+
+SIMD_INLINE uint32_t v64_low_u32(v64 a) {
+  return vget_lane_u32(vreinterpret_u32_s64(a), 0);
+}
+
+SIMD_INLINE uint32_t v64_high_u32(v64 a) {
+  return vget_lane_u32(vreinterpret_u32_s64(a), 1);
+}
+
+SIMD_INLINE int32_t v64_low_s32(v64 a) {
+  return vget_lane_s32(vreinterpret_s32_s64(a), 0);
+}
+
+SIMD_INLINE int32_t v64_high_s32(v64 a) {
+  return vget_lane_s32(vreinterpret_s32_s64(a), 1);
+}
+
+SIMD_INLINE v64 v64_from_16(uint16_t a, uint16_t b, uint16_t c, uint16_t d) {
+  return vcreate_s64((uint64_t)a << 48 | (uint64_t)b << 32 | (uint64_t)c << 16 |
+                     d);
+}
+
+SIMD_INLINE v64 v64_from_32(uint32_t x, uint32_t y) {
+  return vcreate_s64((uint64_t)x << 32 | y);
+}
+
+SIMD_INLINE v64 v64_from_64(uint64_t x) { return vcreate_s64(x); }
+
+SIMD_INLINE uint64_t v64_u64(v64 x) { return (uint64_t)x; }
+
+SIMD_INLINE uint32_t u32_load_aligned(const void *p) {
+  return *((uint32_t *)p);
+}
+
+SIMD_INLINE uint32_t u32_load_unaligned(const void *p) {
+  return vget_lane_u32(vreinterpret_u32_u8(vld1_u8((const uint8_t *)p)), 0);
+}
+
+SIMD_INLINE void u32_store_aligned(void *p, uint32_t a) {
+  *((uint32_t *)p) = a;
+}
+
+SIMD_INLINE void u32_store_unaligned(void *p, uint32_t a) {
+#if defined(__clang__)
+  vst1_lane_u32((uint32_t *)p, vreinterpret_u32_s64((uint64x1_t)(uint64_t)a),
+                0);
+#elif defined(__CC_ARM)
+  *(__packed uint32_t *)p) = a;
+#elif defined(__GNUC__)
+  *((__attribute((packed)) uint32_t *)p) = a;
+#else
+  vst1_lane_u32((uint32_t *)p, vreinterpret_u32_s64((uint64x1_t)(uint64_t)a),
+                0);
+#endif
+}
+
+SIMD_INLINE v64 v64_load_aligned(const void *p) {
+  return vreinterpret_s64_u8(vld1_u8((const uint8_t *)p));
+}
+
+SIMD_INLINE v64 v64_load_unaligned(const void *p) {
+  return v64_load_aligned(p);
+}
+
+SIMD_INLINE void v64_store_aligned(void *p, v64 r) {
+  vst1_u8((uint8_t *)p, vreinterpret_u8_s64(r));
+}
+
+SIMD_INLINE void v64_store_unaligned(void *p, v64 r) {
+  vst1_u8((uint8_t *)p, vreinterpret_u8_s64(r));
+}
+
+// The following function requires an immediate.
+// Some compilers will check this if it's optimising, others wont.
+SIMD_INLINE v64 v64_align(v64 a, v64 b, unsigned int c) {
+#if defined(__OPTIMIZE__) && __OPTIMIZE__ && !defined(__clang__)
+  return c ? vreinterpret_s64_s8(
+                 vext_s8(vreinterpret_s8_s64(b), vreinterpret_s8_s64(a), c))
+           : b;
+#else
+  return c ? v64_from_64(((uint64_t)b >> c * 8) | ((uint64_t)a << (8 - c) * 8))
+           : b;
+#endif
+}
+
+SIMD_INLINE v64 v64_zero() { return vreinterpret_s64_u8(vdup_n_u8(0)); }
+
+SIMD_INLINE v64 v64_dup_8(uint8_t x) {
+  return vreinterpret_s64_u8(vdup_n_u8(x));
+}
+
+SIMD_INLINE v64 v64_dup_16(uint16_t x) {
+  return vreinterpret_s64_u16(vdup_n_u16(x));
+}
+
+SIMD_INLINE v64 v64_dup_32(uint32_t x) {
+  return vreinterpret_s64_u32(vdup_n_u32(x));
+}
+
+SIMD_INLINE int64_t v64_dotp_su8(v64 x, v64 y) {
+  int16x8_t t =
+      vmulq_s16(vmovl_s8(vreinterpret_s8_s64(x)),
+                vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_s64(y))));
+#if defined(__aarch64__)
+  return vaddlvq_s16(t);
+#else
+  int64x2_t r = vpaddlq_s32(vpaddlq_s16(t));
+  return (int64_t)vadd_s64(vget_high_s64(r), vget_low_s64(r));
+#endif
+}
+
+SIMD_INLINE int64_t v64_dotp_s16(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vaddlvq_s32(
+      vmull_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+#else
+  int64x2_t r =
+      vpaddlq_s32(vmull_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+  return (int64_t)(vget_high_s64(r) + vget_low_s64(r));
+#endif
+}
+
+SIMD_INLINE uint64_t v64_hadd_u8(v64 x) {
+#if defined(__aarch64__)
+  return vaddlv_u8(vreinterpret_u8_s64(x));
+#else
+  return (uint64_t)vpaddl_u32(vpaddl_u16(vpaddl_u8(vreinterpret_u8_s64(x))));
+#endif
+}
+
+SIMD_INLINE int64_t v64_hadd_s16(v64 a) {
+  return (int64_t)vpaddl_s32(vpaddl_s16(vreinterpret_s16_s64(a)));
+}
+
+typedef uint16x8_t sad64_internal;
+
+SIMD_INLINE sad64_internal v64_sad_u8_init() { return vdupq_n_u16(0); }
+
+// Implementation dependent return value. Result must be finalised with
+// v64_sad_u8_sum().
+SIMD_INLINE sad64_internal v64_sad_u8(sad64_internal s, v64 a, v64 b) {
+  return vabal_u8(s, vreinterpret_u8_s64(a), vreinterpret_u8_s64(b));
+}
+
+SIMD_INLINE uint32_t v64_sad_u8_sum(sad64_internal s) {
+#if defined(__aarch64__)
+  return vaddlvq_u16(s);
+#else
+  uint64x2_t r = vpaddlq_u32(vpaddlq_u16(s));
+  return (uint32_t)(uint64_t)(vget_high_u64(r) + vget_low_u64(r));
+#endif
+}
+
+typedef uint32x4_t ssd64_internal;
+
+SIMD_INLINE ssd64_internal v64_ssd_u8_init() { return vdupq_n_u32(0); }
+
+// Implementation dependent return value. Result must be finalised with
+// v64_ssd_u8_sum().
+SIMD_INLINE ssd64_internal v64_ssd_u8(ssd64_internal s, v64 a, v64 b) {
+  uint8x8_t t = vabd_u8(vreinterpret_u8_s64(a), vreinterpret_u8_s64(b));
+  return vaddq_u32(s, vpaddlq_u16(vmull_u8(t, t)));
+}
+
+SIMD_INLINE uint32_t v64_ssd_u8_sum(ssd64_internal s) {
+#if defined(__aarch64__)
+  return vaddvq_u32(s);
+#else
+  uint64x2_t t = vpaddlq_u32(s);
+  return vget_lane_u32(
+      vreinterpret_u32_u64(vadd_u64(vget_high_u64(t), vget_low_u64(t))), 0);
+#endif
+}
+
+SIMD_INLINE v64 v64_or(v64 x, v64 y) { return vorr_s64(x, y); }
+
+SIMD_INLINE v64 v64_xor(v64 x, v64 y) { return veor_s64(x, y); }
+
+SIMD_INLINE v64 v64_and(v64 x, v64 y) { return vand_s64(x, y); }
+
+SIMD_INLINE v64 v64_andn(v64 x, v64 y) { return vbic_s64(x, y); }
+
+SIMD_INLINE v64 v64_add_8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vadd_u8(vreinterpret_u8_s64(x), vreinterpret_u8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_sadd_u8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vqadd_u8(vreinterpret_u8_s64(x), vreinterpret_u8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_sadd_s8(v64 x, v64 y) {
+  return vreinterpret_s64_s8(
+      vqadd_s8(vreinterpret_s8_s64(x), vreinterpret_s8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_add_16(v64 x, v64 y) {
+  return vreinterpret_s64_s16(
+      vadd_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_sadd_s16(v64 x, v64 y) {
+  return vreinterpret_s64_s16(
+      vqadd_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_add_32(v64 x, v64 y) {
+  return vreinterpret_s64_u32(
+      vadd_u32(vreinterpret_u32_s64(x), vreinterpret_u32_s64(y)));
+}
+
+SIMD_INLINE v64 v64_sub_8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vsub_u8(vreinterpret_u8_s64(x), vreinterpret_u8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_sub_16(v64 x, v64 y) {
+  return vreinterpret_s64_s16(
+      vsub_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_ssub_s16(v64 x, v64 y) {
+  return vreinterpret_s64_s16(
+      vqsub_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_ssub_u16(v64 x, v64 y) {
+  return vreinterpret_s64_u16(
+      vqsub_u16(vreinterpret_u16_s64(x), vreinterpret_u16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_ssub_u8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vqsub_u8(vreinterpret_u8_s64(x), vreinterpret_u8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_ssub_s8(v64 x, v64 y) {
+  return vreinterpret_s64_s8(
+      vqsub_s8(vreinterpret_s8_s64(x), vreinterpret_s8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_sub_32(v64 x, v64 y) {
+  return vreinterpret_s64_s32(
+      vsub_s32(vreinterpret_s32_s64(x), vreinterpret_s32_s64(y)));
+}
+
+SIMD_INLINE v64 v64_abs_s16(v64 x) {
+  return vreinterpret_s64_s16(vabs_s16(vreinterpret_s16_s64(x)));
+}
+
+SIMD_INLINE v64 v64_abs_s8(v64 x) {
+  return vreinterpret_s64_s8(vabs_s8(vreinterpret_s8_s64(x)));
+}
+
+SIMD_INLINE v64 v64_mullo_s16(v64 x, v64 y) {
+  return vreinterpret_s64_s16(
+      vmul_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_mulhi_s16(v64 x, v64 y) {
+#if defined(__aarch64__)
+  int16x8_t t = vreinterpretq_s16_s32(
+      vmull_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+  return vget_low_s64(vreinterpretq_s64_s16(vuzp2q_s16(t, t)));
+#else
+  return vreinterpret_s64_s16(vmovn_s32(vshrq_n_s32(
+      vmull_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)), 16)));
+#endif
+}
+
+SIMD_INLINE v64 v64_mullo_s32(v64 x, v64 y) {
+  return vreinterpret_s64_s32(
+      vmul_s32(vreinterpret_s32_s64(x), vreinterpret_s32_s64(y)));
+}
+
+SIMD_INLINE v64 v64_madd_s16(v64 x, v64 y) {
+  int32x4_t t = vmull_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y));
+  return vreinterpret_s64_s32(
+      vpadd_s32(vreinterpret_s32_s64(vget_low_s64(vreinterpretq_s64_s32(t))),
+                vreinterpret_s32_s64(vget_high_s64(vreinterpretq_s64_s32(t)))));
+}
+
+SIMD_INLINE v64 v64_madd_us8(v64 x, v64 y) {
+  int16x8_t t =
+      vmulq_s16(vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_s64(x))),
+                vmovl_s8(vreinterpret_s8_s64(y)));
+  return vreinterpret_s64_s16(vqmovn_s32(vpaddlq_s16(t)));
+}
+
+SIMD_INLINE v64 v64_avg_u8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vrhadd_u8(vreinterpret_u8_s64(x), vreinterpret_u8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_rdavg_u8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vhadd_u8(vreinterpret_u8_s64(x), vreinterpret_u8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_rdavg_u16(v64 x, v64 y) {
+  return vreinterpret_s64_u16(
+      vhadd_u16(vreinterpret_u16_s64(x), vreinterpret_u16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_avg_u16(v64 x, v64 y) {
+  return vreinterpret_s64_u16(
+      vrhadd_u16(vreinterpret_u16_s64(x), vreinterpret_u16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_max_u8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vmax_u8(vreinterpret_u8_s64(x), vreinterpret_u8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_min_u8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vmin_u8(vreinterpret_u8_s64(x), vreinterpret_u8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_max_s8(v64 x, v64 y) {
+  return vreinterpret_s64_s8(
+      vmax_s8(vreinterpret_s8_s64(x), vreinterpret_s8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_min_s8(v64 x, v64 y) {
+  return vreinterpret_s64_s8(
+      vmin_s8(vreinterpret_s8_s64(x), vreinterpret_s8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_max_s16(v64 x, v64 y) {
+  return vreinterpret_s64_s16(
+      vmax_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_min_s16(v64 x, v64 y) {
+  return vreinterpret_s64_s16(
+      vmin_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_ziplo_8(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vreinterpret_s64_u8(
+      vzip1_u8(vreinterpret_u8_s64(y), vreinterpret_u8_s64(x)));
+#else
+  uint8x8x2_t r = vzip_u8(vreinterpret_u8_s64(y), vreinterpret_u8_s64(x));
+  return vreinterpret_s64_u8(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v64 v64_ziphi_8(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vreinterpret_s64_u8(
+      vzip2_u8(vreinterpret_u8_s64(y), vreinterpret_u8_s64(x)));
+#else
+  uint8x8x2_t r = vzip_u8(vreinterpret_u8_s64(y), vreinterpret_u8_s64(x));
+  return vreinterpret_s64_u8(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v64 v64_ziplo_16(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vreinterpret_s64_u16(
+      vzip1_u16(vreinterpret_u16_s64(y), vreinterpret_u16_s64(x)));
+#else
+  int16x4x2_t r = vzip_s16(vreinterpret_s16_s64(y), vreinterpret_s16_s64(x));
+  return vreinterpret_s64_s16(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v64 v64_ziphi_16(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vreinterpret_s64_u16(
+      vzip2_u16(vreinterpret_u16_s64(y), vreinterpret_u16_s64(x)));
+#else
+  int16x4x2_t r = vzip_s16(vreinterpret_s16_s64(y), vreinterpret_s16_s64(x));
+  return vreinterpret_s64_s16(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v64 v64_ziplo_32(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vreinterpret_s64_u32(
+      vzip1_u32(vreinterpret_u32_s64(y), vreinterpret_u32_s64(x)));
+#else
+  int32x2x2_t r = vzip_s32(vreinterpret_s32_s64(y), vreinterpret_s32_s64(x));
+  return vreinterpret_s64_s32(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v64 v64_ziphi_32(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vreinterpret_s64_u32(
+      vzip2_u32(vreinterpret_u32_s64(y), vreinterpret_u32_s64(x)));
+#else
+  int32x2x2_t r = vzip_s32(vreinterpret_s32_s64(y), vreinterpret_s32_s64(x));
+  return vreinterpret_s64_s32(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v64 v64_unpacklo_u8_s16(v64 a) {
+  return vreinterpret_s64_u16(vget_low_u16(vmovl_u8(vreinterpret_u8_s64(a))));
+}
+
+SIMD_INLINE v64 v64_unpackhi_u8_s16(v64 a) {
+  return vreinterpret_s64_u16(vget_high_u16(vmovl_u8(vreinterpret_u8_s64(a))));
+}
+
+SIMD_INLINE v64 v64_unpacklo_s8_s16(v64 a) {
+  return vreinterpret_s64_s16(vget_low_s16(vmovl_s8(vreinterpret_s8_s64(a))));
+}
+
+SIMD_INLINE v64 v64_unpackhi_s8_s16(v64 a) {
+  return vreinterpret_s64_s16(vget_high_s16(vmovl_s8(vreinterpret_s8_s64(a))));
+}
+
+SIMD_INLINE v64 v64_pack_s32_s16(v64 x, v64 y) {
+  return vreinterpret_s64_s16(vqmovn_s32(
+      vcombine_s32(vreinterpret_s32_s64(y), vreinterpret_s32_s64(x))));
+}
+
+SIMD_INLINE v64 v64_pack_s32_u16(v64 x, v64 y) {
+  return vreinterpret_s64_u16(vqmovun_s32(
+      vcombine_s32(vreinterpret_s32_s64(y), vreinterpret_s32_s64(x))));
+}
+
+SIMD_INLINE v64 v64_pack_s16_u8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(vqmovun_s16(vreinterpretq_s16_s32(
+      vcombine_s32(vreinterpret_s32_s64(y), vreinterpret_s32_s64(x)))));
+}
+
+SIMD_INLINE v64 v64_pack_s16_s8(v64 x, v64 y) {
+  return vreinterpret_s64_s8(vqmovn_s16(vreinterpretq_s16_s32(
+      vcombine_s32(vreinterpret_s32_s64(y), vreinterpret_s32_s64(x)))));
+}
+
+SIMD_INLINE v64 v64_unziplo_8(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vreinterpret_s64_u8(
+      vuzp1_u8(vreinterpret_u8_s64(y), vreinterpret_u8_s64(x)));
+#else
+  uint8x8x2_t r = vuzp_u8(vreinterpret_u8_s64(y), vreinterpret_u8_s64(x));
+  return vreinterpret_s64_u8(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v64 v64_unziphi_8(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vreinterpret_s64_u8(
+      vuzp2_u8(vreinterpret_u8_s64(y), vreinterpret_u8_s64(x)));
+#else
+  uint8x8x2_t r = vuzp_u8(vreinterpret_u8_s64(y), vreinterpret_u8_s64(x));
+  return vreinterpret_s64_u8(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v64 v64_unziplo_16(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vreinterpret_s64_u16(
+      vuzp1_u16(vreinterpret_u16_s64(y), vreinterpret_u16_s64(x)));
+#else
+  uint16x4x2_t r = vuzp_u16(vreinterpret_u16_s64(y), vreinterpret_u16_s64(x));
+  return vreinterpret_s64_u16(r.val[0]);
+#endif
+}
+
+SIMD_INLINE v64 v64_unziphi_16(v64 x, v64 y) {
+#if defined(__aarch64__)
+  return vreinterpret_s64_u16(
+      vuzp2_u16(vreinterpret_u16_s64(y), vreinterpret_u16_s64(x)));
+#else
+  uint16x4x2_t r = vuzp_u16(vreinterpret_u16_s64(y), vreinterpret_u16_s64(x));
+  return vreinterpret_s64_u16(r.val[1]);
+#endif
+}
+
+SIMD_INLINE v64 v64_unpacklo_s16_s32(v64 x) {
+  return vreinterpret_s64_s32(vget_low_s32(vmovl_s16(vreinterpret_s16_s64(x))));
+}
+
+SIMD_INLINE v64 v64_unpacklo_u16_s32(v64 x) {
+  return vreinterpret_s64_u32(vget_low_u32(vmovl_u16(vreinterpret_u16_s64(x))));
+}
+
+SIMD_INLINE v64 v64_unpackhi_s16_s32(v64 x) {
+  return vreinterpret_s64_s32(
+      vget_high_s32(vmovl_s16(vreinterpret_s16_s64(x))));
+}
+
+SIMD_INLINE v64 v64_unpackhi_u16_s32(v64 x) {
+  return vreinterpret_s64_u32(
+      vget_high_u32(vmovl_u16(vreinterpret_u16_s64(x))));
+}
+
+SIMD_INLINE v64 v64_shuffle_8(v64 x, v64 pattern) {
+  return vreinterpret_s64_u8(
+      vtbl1_u8(vreinterpret_u8_s64(x), vreinterpret_u8_s64(pattern)));
+}
+
+SIMD_INLINE v64 v64_cmpgt_s8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vcgt_s8(vreinterpret_s8_s64(x), vreinterpret_s8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_cmplt_s8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vclt_s8(vreinterpret_s8_s64(x), vreinterpret_s8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_cmpeq_8(v64 x, v64 y) {
+  return vreinterpret_s64_u8(
+      vceq_u8(vreinterpret_u8_s64(x), vreinterpret_u8_s64(y)));
+}
+
+SIMD_INLINE v64 v64_cmpgt_s16(v64 x, v64 y) {
+  return vreinterpret_s64_u16(
+      vcgt_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_cmplt_s16(v64 x, v64 y) {
+  return vreinterpret_s64_u16(
+      vclt_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_cmpeq_16(v64 x, v64 y) {
+  return vreinterpret_s64_u16(
+      vceq_s16(vreinterpret_s16_s64(x), vreinterpret_s16_s64(y)));
+}
+
+SIMD_INLINE v64 v64_shl_8(v64 a, unsigned int c) {
+  return vreinterpret_s64_u8(vshl_u8(vreinterpret_u8_s64(a), vdup_n_s8(c)));
+}
+
+SIMD_INLINE v64 v64_shr_u8(v64 a, unsigned int c) {
+  return vreinterpret_s64_u8(vshl_u8(vreinterpret_u8_s64(a), vdup_n_s8(-c)));
+}
+
+SIMD_INLINE v64 v64_shr_s8(v64 a, unsigned int c) {
+  return vreinterpret_s64_s8(vshl_s8(vreinterpret_s8_s64(a), vdup_n_s8(-c)));
+}
+
+SIMD_INLINE v64 v64_shl_16(v64 a, unsigned int c) {
+  return vreinterpret_s64_u16(vshl_u16(vreinterpret_u16_s64(a), vdup_n_s16(c)));
+}
+
+SIMD_INLINE v64 v64_shr_u16(v64 a, unsigned int c) {
+  return vreinterpret_s64_u16(
+      vshl_u16(vreinterpret_u16_s64(a), vdup_n_s16(-(int)c)));
+}
+
+SIMD_INLINE v64 v64_shr_s16(v64 a, unsigned int c) {
+  return vreinterpret_s64_s16(
+      vshl_s16(vreinterpret_s16_s64(a), vdup_n_s16(-(int)c)));
+}
+
+SIMD_INLINE v64 v64_shl_32(v64 a, unsigned int c) {
+  return vreinterpret_s64_u32(vshl_u32(vreinterpret_u32_s64(a), vdup_n_s32(c)));
+}
+
+SIMD_INLINE v64 v64_shr_u32(v64 a, unsigned int c) {
+  return vreinterpret_s64_u32(
+      vshl_u32(vreinterpret_u32_s64(a), vdup_n_s32(-(int)c)));
+}
+
+SIMD_INLINE v64 v64_shr_s32(v64 a, unsigned int c) {
+  return vreinterpret_s64_s32(
+      vshl_s32(vreinterpret_s32_s64(a), vdup_n_s32(-(int)c)));
+}
+
+// The following functions require an immediate.
+// Some compilers will check this during optimisation, others wont.
+#if defined(__OPTIMIZE__) && __OPTIMIZE__ && !defined(__clang__)
+
+SIMD_INLINE v64 v64_shl_n_byte(v64 a, unsigned int c) {
+  return vshl_n_s64(a, c * 8);
+}
+
+SIMD_INLINE v64 v64_shr_n_byte(v64 a, unsigned int c) {
+  return c ? (v64)vshr_n_u64(vreinterpret_u64_s64(a), c * 8) : a;
+}
+
+SIMD_INLINE v64 v64_shl_n_8(v64 a, unsigned int c) {
+  return vreinterpret_s64_u8(vshl_n_u8(vreinterpret_u8_s64(a), c));
+}
+
+SIMD_INLINE v64 v64_shr_n_u8(v64 a, unsigned int c) {
+  return vreinterpret_s64_u8(vshr_n_u8(vreinterpret_u8_s64(a), c));
+}
+
+SIMD_INLINE v64 v64_shr_n_s8(v64 a, unsigned int c) {
+  return vreinterpret_s64_s8(vshr_n_s8(vreinterpret_s8_s64(a), c));
+}
+
+SIMD_INLINE v64 v64_shl_n_16(v64 a, unsigned int c) {
+  return vreinterpret_s64_u16(vshl_n_u16(vreinterpret_u16_s64(a), c));
+}
+
+SIMD_INLINE v64 v64_shr_n_u16(v64 a, unsigned int c) {
+  return vreinterpret_s64_u16(vshr_n_u16(vreinterpret_u16_s64(a), c));
+}
+
+SIMD_INLINE v64 v64_shr_n_s16(v64 a, unsigned int c) {
+  return vreinterpret_s64_s16(vshr_n_s16(vreinterpret_s16_s64(a), c));
+}
+
+SIMD_INLINE v64 v64_shl_n_32(v64 a, unsigned int c) {
+  return vreinterpret_s64_u32(vshl_n_u32(vreinterpret_u32_s64(a), c));
+}
+
+SIMD_INLINE v64 v64_shr_n_u32(v64 a, unsigned int c) {
+  return vreinterpret_s64_u32(vshr_n_u32(vreinterpret_u32_s64(a), c));
+}
+
+SIMD_INLINE v64 v64_shr_n_s32(v64 a, unsigned int c) {
+  return vreinterpret_s64_s32(vshr_n_s32(vreinterpret_s32_s64(a), c));
+}
+
+#else
+
+SIMD_INLINE v64 v64_shl_n_byte(v64 a, unsigned int c) {
+  return v64_from_64(v64_u64(a) << c * 8);
+}
+
+SIMD_INLINE v64 v64_shr_n_byte(v64 a, unsigned int c) {
+  return v64_from_64(v64_u64(a) >> c * 8);
+}
+
+SIMD_INLINE v64 v64_shl_n_8(v64 a, unsigned int c) { return v64_shl_8(a, c); }
+
+SIMD_INLINE v64 v64_shr_n_u8(v64 a, unsigned int c) { return v64_shr_u8(a, c); }
+
+SIMD_INLINE v64 v64_shr_n_s8(v64 a, unsigned int c) { return v64_shr_s8(a, c); }
+
+SIMD_INLINE v64 v64_shl_n_16(v64 a, unsigned int c) { return v64_shl_16(a, c); }
+
+SIMD_INLINE v64 v64_shr_n_u16(v64 a, unsigned int c) {
+  return v64_shr_u16(a, c);
+}
+
+SIMD_INLINE v64 v64_shr_n_s16(v64 a, unsigned int c) {
+  return v64_shr_s16(a, c);
+}
+
+SIMD_INLINE v64 v64_shl_n_32(v64 a, unsigned int c) { return v64_shl_32(a, c); }
+
+SIMD_INLINE v64 v64_shr_n_u32(v64 a, unsigned int c) {
+  return v64_shr_u32(a, c);
+}
+
+SIMD_INLINE v64 v64_shr_n_s32(v64 a, unsigned int c) {
+  return v64_shr_s32(a, c);
+}
+
+#endif
+
+#endif  // AOM_AOM_DSP_SIMD_V64_INTRINSICS_ARM_H_
diff --git a/third_party/aom/aom_dsp/simd/v64_intrinsics_c.h b/third_party/aom/aom_dsp/simd/v64_intrinsics_c.h
new file mode 100644
index 0000000000..028d68c4f7
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v64_intrinsics_c.h
@@ -0,0 +1,968 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V64_INTRINSICS_C_H_
+#define AOM_AOM_DSP_SIMD_V64_INTRINSICS_C_H_
+
+/* Note: This implements the intrinsics in plain, unoptimised C.
+   Intended for reference, porting or debugging. */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "config/aom_config.h"
+
+typedef union {
+  uint8_t u8[8];
+  uint16_t u16[4];
+  uint32_t u32[2];
+  uint64_t u64;
+  int8_t s8[8];
+  int16_t s16[4];
+  int32_t s32[2];
+  int64_t s64;
+} c_v64;
+
+SIMD_INLINE uint32_t c_v64_low_u32(c_v64 a) {
+  return a.u32[!!CONFIG_BIG_ENDIAN];
+}
+
+SIMD_INLINE uint32_t c_v64_high_u32(c_v64 a) {
+  return a.u32[!CONFIG_BIG_ENDIAN];
+}
+
+SIMD_INLINE int32_t c_v64_low_s32(c_v64 a) {
+  return a.s32[!!CONFIG_BIG_ENDIAN];
+}
+
+SIMD_INLINE int32_t c_v64_high_s32(c_v64 a) {
+  return a.s32[!CONFIG_BIG_ENDIAN];
+}
+
+SIMD_INLINE c_v64 c_v64_from_32(uint32_t x, uint32_t y) {
+  c_v64 t;
+  t.u32[!CONFIG_BIG_ENDIAN] = x;
+  t.u32[!!CONFIG_BIG_ENDIAN] = y;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_from_64(uint64_t x) {
+  c_v64 t;
+  t.u64 = x;
+  return t;
+}
+
+SIMD_INLINE uint64_t c_v64_u64(c_v64 x) { return x.u64; }
+
+SIMD_INLINE c_v64 c_v64_from_16(uint16_t a, uint16_t b, uint16_t c,
+                                uint16_t d) {
+  c_v64 t;
+  if (CONFIG_BIG_ENDIAN) {
+    t.u16[0] = a;
+    t.u16[1] = b;
+    t.u16[2] = c;
+    t.u16[3] = d;
+  } else {
+    t.u16[3] = a;
+    t.u16[2] = b;
+    t.u16[1] = c;
+    t.u16[0] = d;
+  }
+  return t;
+}
+
+SIMD_INLINE uint32_t c_u32_load_unaligned(const void *p) {
+  uint32_t t;
+  uint8_t *pp = (uint8_t *)p;
+  uint8_t *q = (uint8_t *)&t;
+  int c;
+  for (c = 0; c < 4; c++) q[c] = pp[c];
+  return t;
+}
+
+SIMD_INLINE void c_u32_store_unaligned(void *p, uint32_t a) {
+  uint8_t *pp = (uint8_t *)p;
+  uint8_t *q = (uint8_t *)&a;
+  int c;
+  for (c = 0; c < 4; c++) pp[c] = q[c];
+}
+
+SIMD_INLINE uint32_t c_u32_load_aligned(const void *p) {
+  if (SIMD_CHECK && (uintptr_t)p & 3) {
+    fprintf(stderr, "Error: Unaligned u32 load at %p\n", p);
+    abort();
+  }
+  return c_u32_load_unaligned(p);
+}
+
+SIMD_INLINE void c_u32_store_aligned(void *p, uint32_t a) {
+  if (SIMD_CHECK && (uintptr_t)p & 3) {
+    fprintf(stderr, "Error: Unaligned u32 store at %p\n", p);
+    abort();
+  }
+  c_u32_store_unaligned(p, a);
+}
+
+SIMD_INLINE c_v64 c_v64_load_unaligned(const void *p) {
+  c_v64 t;
+  uint8_t *pp = (uint8_t *)p;
+  uint8_t *q = (uint8_t *)&t;
+  int c;
+  for (c = 0; c < 8; c++) q[c] = pp[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_load_aligned(const void *p) {
+  if (SIMD_CHECK && (uintptr_t)p & 7) {
+    fprintf(stderr, "Error: Unaligned c_v64 load at %p\n", p);
+    abort();
+  }
+  return c_v64_load_unaligned(p);
+}
+
+SIMD_INLINE void c_v64_store_unaligned(void *p, c_v64 a) {
+  uint8_t *q = (uint8_t *)p;
+  uint8_t *r = (uint8_t *)&a;
+  int c;
+  for (c = 0; c < 8; c++) q[c] = r[c];
+}
+
+SIMD_INLINE void c_v64_store_aligned(void *p, c_v64 a) {
+  if (SIMD_CHECK && (uintptr_t)p & 7) {
+    fprintf(stderr, "Error: Unaligned c_v64 store at %p\n", p);
+    abort();
+  }
+  c_v64_store_unaligned(p, a);
+}
+
+SIMD_INLINE c_v64 c_v64_zero() {
+  c_v64 t;
+  t.u64 = 0;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_dup_8(uint8_t x) {
+  c_v64 t;
+  t.u8[0] = t.u8[1] = t.u8[2] = t.u8[3] = t.u8[4] = t.u8[5] = t.u8[6] =
+      t.u8[7] = x;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_dup_16(uint16_t x) {
+  c_v64 t;
+  t.u16[0] = t.u16[1] = t.u16[2] = t.u16[3] = x;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_dup_32(uint32_t x) {
+  c_v64 t;
+  t.u32[0] = t.u32[1] = x;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_add_8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.u8[c] = a.u8[c] + b.u8[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_add_16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.u16[c] = a.u16[c] + b.u16[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_sadd_u8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++)
+    t.u8[c] = (int16_t)a.u8[c] + (int16_t)b.u8[c] > 255
+                  ? 255
+                  : (int16_t)a.u8[c] + (int16_t)b.u8[c] < 0
+                        ? 0
+                        : (int16_t)a.u8[c] + (int16_t)b.u8[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_sadd_s8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++)
+    t.s8[c] = (int16_t)a.s8[c] + (int16_t)b.s8[c] > 127
+                  ? 127
+                  : (int16_t)a.s8[c] + (int16_t)b.s8[c] < -128
+                        ? -128
+                        : (int16_t)a.s8[c] + (int16_t)b.s8[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_sadd_s16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++)
+    t.s16[c] = (int32_t)a.s16[c] + (int32_t)b.s16[c] > 32767
+                   ? 32767
+                   : (int32_t)a.s16[c] + (int32_t)b.s16[c] < -32768
+                         ? -32768
+                         : (int32_t)a.s16[c] + (int32_t)b.s16[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_add_32(c_v64 a, c_v64 b) {
+  c_v64 t;
+  t.u32[0] = (uint32_t)((uint64_t)a.u32[0] + b.u32[0]);
+  t.u32[1] = (uint32_t)((uint64_t)a.u32[1] + b.u32[1]);
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_sub_8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.u8[c] = a.u8[c] - b.u8[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_ssub_u8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.u8[c] = a.u8[c] < b.u8[c] ? 0 : a.u8[c] - b.u8[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_ssub_s8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) {
+    int16_t d = (int16_t)a.s8[c] - (int16_t)b.s8[c];
+    t.s8[c] = d > 127 ? 127 : (d < -128 ? -128 : d);
+  }
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_sub_16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.u16[c] = a.u16[c] - b.u16[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_ssub_s16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++)
+    t.s16[c] = (int32_t)a.s16[c] - (int32_t)b.s16[c] < -32768
+                   ? -32768
+                   : (int32_t)a.s16[c] - (int32_t)b.s16[c] > 32767
+                         ? 32767
+                         : (int32_t)a.s16[c] - (int32_t)b.s16[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_ssub_u16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++)
+    t.u16[c] =
+        (int32_t)a.u16[c] - (int32_t)b.u16[c] < 0 ? 0 : a.u16[c] - b.u16[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_sub_32(c_v64 a, c_v64 b) {
+  c_v64 t;
+  t.u32[0] = (uint32_t)((int64_t)a.u32[0] - b.u32[0]);
+  t.u32[1] = (uint32_t)((int64_t)a.u32[1] - b.u32[1]);
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_abs_s16(c_v64 a) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++)
+    t.u16[c] = (int16_t)a.u16[c] > 0 ? a.u16[c] : -a.u16[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_abs_s8(c_v64 a) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.u8[c] = (int8_t)a.u8[c] > 0 ? a.u8[c] : -a.u8[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 _c_v64_zip_8(c_v64 a, c_v64 b, int mode) {
+  c_v64 t;
+  if (mode) {
+    t.u8[7] = a.u8[7];
+    t.u8[6] = b.u8[7];
+    t.u8[5] = a.u8[6];
+    t.u8[4] = b.u8[6];
+    t.u8[3] = a.u8[5];
+    t.u8[2] = b.u8[5];
+    t.u8[1] = a.u8[4];
+    t.u8[0] = b.u8[4];
+  } else {
+    t.u8[7] = a.u8[3];
+    t.u8[6] = b.u8[3];
+    t.u8[5] = a.u8[2];
+    t.u8[4] = b.u8[2];
+    t.u8[3] = a.u8[1];
+    t.u8[2] = b.u8[1];
+    t.u8[1] = a.u8[0];
+    t.u8[0] = b.u8[0];
+  }
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_ziplo_8(c_v64 a, c_v64 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v64_zip_8(b, a, 1) : _c_v64_zip_8(a, b, 0);
+}
+
+SIMD_INLINE c_v64 c_v64_ziphi_8(c_v64 a, c_v64 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v64_zip_8(b, a, 0) : _c_v64_zip_8(a, b, 1);
+}
+
+SIMD_INLINE c_v64 _c_v64_zip_16(c_v64 a, c_v64 b, int mode) {
+  c_v64 t;
+  if (mode) {
+    t.u16[3] = a.u16[3];
+    t.u16[2] = b.u16[3];
+    t.u16[1] = a.u16[2];
+    t.u16[0] = b.u16[2];
+  } else {
+    t.u16[3] = a.u16[1];
+    t.u16[2] = b.u16[1];
+    t.u16[1] = a.u16[0];
+    t.u16[0] = b.u16[0];
+  }
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_ziplo_16(c_v64 a, c_v64 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v64_zip_16(b, a, 1) : _c_v64_zip_16(a, b, 0);
+}
+
+SIMD_INLINE c_v64 c_v64_ziphi_16(c_v64 a, c_v64 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v64_zip_16(b, a, 0) : _c_v64_zip_16(a, b, 1);
+}
+
+SIMD_INLINE c_v64 _c_v64_zip_32(c_v64 a, c_v64 b, int mode) {
+  c_v64 t;
+  if (mode) {
+    t.u32[1] = a.u32[1];
+    t.u32[0] = b.u32[1];
+  } else {
+    t.u32[1] = a.u32[0];
+    t.u32[0] = b.u32[0];
+  }
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_ziplo_32(c_v64 a, c_v64 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v64_zip_32(b, a, 1) : _c_v64_zip_32(a, b, 0);
+}
+
+SIMD_INLINE c_v64 c_v64_ziphi_32(c_v64 a, c_v64 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v64_zip_32(b, a, 0) : _c_v64_zip_32(a, b, 1);
+}
+
+SIMD_INLINE c_v64 _c_v64_unzip_8(c_v64 a, c_v64 b, int mode) {
+  c_v64 t;
+  if (mode) {
+    t.u8[7] = b.u8[7];
+    t.u8[6] = b.u8[5];
+    t.u8[5] = b.u8[3];
+    t.u8[4] = b.u8[1];
+    t.u8[3] = a.u8[7];
+    t.u8[2] = a.u8[5];
+    t.u8[1] = a.u8[3];
+    t.u8[0] = a.u8[1];
+  } else {
+    t.u8[7] = a.u8[6];
+    t.u8[6] = a.u8[4];
+    t.u8[5] = a.u8[2];
+    t.u8[4] = a.u8[0];
+    t.u8[3] = b.u8[6];
+    t.u8[2] = b.u8[4];
+    t.u8[1] = b.u8[2];
+    t.u8[0] = b.u8[0];
+  }
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_unziplo_8(c_v64 a, c_v64 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v64_unzip_8(a, b, 1) : _c_v64_unzip_8(a, b, 0);
+}
+
+SIMD_INLINE c_v64 c_v64_unziphi_8(c_v64 a, c_v64 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v64_unzip_8(b, a, 0) : _c_v64_unzip_8(b, a, 1);
+}
+
+SIMD_INLINE c_v64 _c_v64_unzip_16(c_v64 a, c_v64 b, int mode) {
+  c_v64 t;
+  if (mode) {
+    t.u16[3] = b.u16[3];
+    t.u16[2] = b.u16[1];
+    t.u16[1] = a.u16[3];
+    t.u16[0] = a.u16[1];
+  } else {
+    t.u16[3] = a.u16[2];
+    t.u16[2] = a.u16[0];
+    t.u16[1] = b.u16[2];
+    t.u16[0] = b.u16[0];
+  }
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_unziplo_16(c_v64 a, c_v64 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v64_unzip_16(a, b, 1)
+                           : _c_v64_unzip_16(a, b, 0);
+}
+
+SIMD_INLINE c_v64 c_v64_unziphi_16(c_v64 a, c_v64 b) {
+  return CONFIG_BIG_ENDIAN ? _c_v64_unzip_16(b, a, 0)
+                           : _c_v64_unzip_16(b, a, 1);
+}
+
+SIMD_INLINE c_v64 c_v64_unpacklo_u8_s16(c_v64 a) {
+  c_v64 t;
+  int endian = !!CONFIG_BIG_ENDIAN * 4;
+  t.s16[3] = (int16_t)a.u8[3 + endian];
+  t.s16[2] = (int16_t)a.u8[2 + endian];
+  t.s16[1] = (int16_t)a.u8[1 + endian];
+  t.s16[0] = (int16_t)a.u8[0 + endian];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_unpackhi_u8_s16(c_v64 a) {
+  c_v64 t;
+  int endian = !!CONFIG_BIG_ENDIAN * 4;
+  t.s16[3] = (int16_t)a.u8[7 - endian];
+  t.s16[2] = (int16_t)a.u8[6 - endian];
+  t.s16[1] = (int16_t)a.u8[5 - endian];
+  t.s16[0] = (int16_t)a.u8[4 - endian];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_unpacklo_s8_s16(c_v64 a) {
+  c_v64 t;
+  int endian = !!CONFIG_BIG_ENDIAN * 4;
+  t.s16[3] = (int16_t)a.s8[3 + endian];
+  t.s16[2] = (int16_t)a.s8[2 + endian];
+  t.s16[1] = (int16_t)a.s8[1 + endian];
+  t.s16[0] = (int16_t)a.s8[0 + endian];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_unpackhi_s8_s16(c_v64 a) {
+  c_v64 t;
+  int endian = !!CONFIG_BIG_ENDIAN * 4;
+  t.s16[3] = (int16_t)a.s8[7 - endian];
+  t.s16[2] = (int16_t)a.s8[6 - endian];
+  t.s16[1] = (int16_t)a.s8[5 - endian];
+  t.s16[0] = (int16_t)a.s8[4 - endian];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_pack_s32_s16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  if (CONFIG_BIG_ENDIAN) {
+    c_v64 u = a;
+    a = b;
+    b = u;
+  }
+  t.s16[3] = a.s32[1] > 32767 ? 32767 : a.s32[1] < -32768 ? -32768 : a.s32[1];
+  t.s16[2] = a.s32[0] > 32767 ? 32767 : a.s32[0] < -32768 ? -32768 : a.s32[0];
+  t.s16[1] = b.s32[1] > 32767 ? 32767 : b.s32[1] < -32768 ? -32768 : b.s32[1];
+  t.s16[0] = b.s32[0] > 32767 ? 32767 : b.s32[0] < -32768 ? -32768 : b.s32[0];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_pack_s32_u16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  if (CONFIG_BIG_ENDIAN) {
+    c_v64 u = a;
+    a = b;
+    b = u;
+  }
+  t.u16[3] = a.s32[1] > 65535 ? 65535 : a.s32[1] < 0 ? 0 : a.s32[1];
+  t.u16[2] = a.s32[0] > 65535 ? 65535 : a.s32[0] < 0 ? 0 : a.s32[0];
+  t.u16[1] = b.s32[1] > 65535 ? 65535 : b.s32[1] < 0 ? 0 : b.s32[1];
+  t.u16[0] = b.s32[0] > 65535 ? 65535 : b.s32[0] < 0 ? 0 : b.s32[0];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_pack_s16_u8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  if (CONFIG_BIG_ENDIAN) {
+    c_v64 u = a;
+    a = b;
+    b = u;
+  }
+  t.u8[7] = a.s16[3] > 255 ? 255 : a.s16[3] < 0 ? 0 : a.s16[3];
+  t.u8[6] = a.s16[2] > 255 ? 255 : a.s16[2] < 0 ? 0 : a.s16[2];
+  t.u8[5] = a.s16[1] > 255 ? 255 : a.s16[1] < 0 ? 0 : a.s16[1];
+  t.u8[4] = a.s16[0] > 255 ? 255 : a.s16[0] < 0 ? 0 : a.s16[0];
+  t.u8[3] = b.s16[3] > 255 ? 255 : b.s16[3] < 0 ? 0 : b.s16[3];
+  t.u8[2] = b.s16[2] > 255 ? 255 : b.s16[2] < 0 ? 0 : b.s16[2];
+  t.u8[1] = b.s16[1] > 255 ? 255 : b.s16[1] < 0 ? 0 : b.s16[1];
+  t.u8[0] = b.s16[0] > 255 ? 255 : b.s16[0] < 0 ? 0 : b.s16[0];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_pack_s16_s8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  if (CONFIG_BIG_ENDIAN) {
+    c_v64 u = a;
+    a = b;
+    b = u;
+  }
+  t.u8[7] = a.s16[3] > 127 ? 127 : a.s16[3] < -128 ? 128 : a.s16[3];
+  t.u8[6] = a.s16[2] > 127 ? 127 : a.s16[2] < -128 ? 128 : a.s16[2];
+  t.u8[5] = a.s16[1] > 127 ? 127 : a.s16[1] < -128 ? 128 : a.s16[1];
+  t.u8[4] = a.s16[0] > 127 ? 127 : a.s16[0] < -128 ? 128 : a.s16[0];
+  t.u8[3] = b.s16[3] > 127 ? 127 : b.s16[3] < -128 ? 128 : b.s16[3];
+  t.u8[2] = b.s16[2] > 127 ? 127 : b.s16[2] < -128 ? 128 : b.s16[2];
+  t.u8[1] = b.s16[1] > 127 ? 127 : b.s16[1] < -128 ? 128 : b.s16[1];
+  t.u8[0] = b.s16[0] > 127 ? 127 : b.s16[0] < -128 ? 128 : b.s16[0];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_unpacklo_u16_s32(c_v64 a) {
+  c_v64 t;
+  t.s32[1] = a.u16[1 + !!CONFIG_BIG_ENDIAN * 2];
+  t.s32[0] = a.u16[0 + !!CONFIG_BIG_ENDIAN * 2];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_unpacklo_s16_s32(c_v64 a) {
+  c_v64 t;
+  t.s32[1] = a.s16[1 + !!CONFIG_BIG_ENDIAN * 2];
+  t.s32[0] = a.s16[0 + !!CONFIG_BIG_ENDIAN * 2];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_unpackhi_u16_s32(c_v64 a) {
+  c_v64 t;
+  t.s32[1] = a.u16[3 - !!CONFIG_BIG_ENDIAN * 2];
+  t.s32[0] = a.u16[2 - !!CONFIG_BIG_ENDIAN * 2];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_unpackhi_s16_s32(c_v64 a) {
+  c_v64 t;
+  t.s32[1] = a.s16[3 - !!CONFIG_BIG_ENDIAN * 2];
+  t.s32[0] = a.s16[2 - !!CONFIG_BIG_ENDIAN * 2];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shuffle_8(c_v64 a, c_v64 pattern) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) {
+    if (SIMD_CHECK && (pattern.u8[c] & ~7)) {
+      fprintf(stderr, "Error: Undefined v64_shuffle_8 index %d/%d\n",
+              pattern.u8[c], c);
+      abort();
+    }
+    t.u8[c] =
+        a.u8[CONFIG_BIG_ENDIAN ? 7 - (pattern.u8[c] & 7) : pattern.u8[c] & 7];
+  }
+  return t;
+}
+
+SIMD_INLINE int64_t c_v64_dotp_su8(c_v64 a, c_v64 b) {
+  return a.s8[7] * b.u8[7] + a.s8[6] * b.u8[6] + a.s8[5] * b.u8[5] +
+         a.s8[4] * b.u8[4] + a.s8[3] * b.u8[3] + a.s8[2] * b.u8[2] +
+         a.s8[1] * b.u8[1] + a.s8[0] * b.u8[0];
+}
+
+SIMD_INLINE int64_t c_v64_dotp_s16(c_v64 a, c_v64 b) {
+  return (int64_t)(a.s16[3] * b.s16[3] + a.s16[2] * b.s16[2]) +
+         (int64_t)(a.s16[1] * b.s16[1] + a.s16[0] * b.s16[0]);
+}
+
+SIMD_INLINE uint64_t c_v64_hadd_u8(c_v64 a) {
+  return a.u8[7] + a.u8[6] + a.u8[5] + a.u8[4] + a.u8[3] + a.u8[2] + a.u8[1] +
+         a.u8[0];
+}
+
+SIMD_INLINE int64_t c_v64_hadd_s16(c_v64 a) {
+  return a.s16[3] + a.s16[2] + a.s16[1] + a.s16[0];
+}
+
+typedef uint32_t c_sad64_internal;
+
+/* Implementation dependent return value.  Result must be finalised with
+   v64_sad_u8_sum().
+   The result for more than 32 v64_sad_u8() calls is undefined. */
+SIMD_INLINE c_sad64_internal c_v64_sad_u8_init() { return 0; }
+
+SIMD_INLINE c_sad64_internal c_v64_sad_u8(c_sad64_internal s, c_v64 a,
+                                          c_v64 b) {
+  int c;
+  for (c = 0; c < 8; c++)
+    s += a.u8[c] > b.u8[c] ? a.u8[c] - b.u8[c] : b.u8[c] - a.u8[c];
+  return s;
+}
+
+SIMD_INLINE uint32_t c_v64_sad_u8_sum(c_sad64_internal s) { return s; }
+
+typedef uint32_t c_ssd64_internal;
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v64_ssd_u8_sum(). */
+SIMD_INLINE c_ssd64_internal c_v64_ssd_u8_init() { return 0; }
+
+SIMD_INLINE c_ssd64_internal c_v64_ssd_u8(c_ssd64_internal s, c_v64 a,
+                                          c_v64 b) {
+  int c;
+  for (c = 0; c < 8; c++) s += (a.u8[c] - b.u8[c]) * (a.u8[c] - b.u8[c]);
+  return s;
+}
+
+SIMD_INLINE uint32_t c_v64_ssd_u8_sum(c_ssd64_internal s) { return s; }
+
+SIMD_INLINE c_v64 c_v64_or(c_v64 a, c_v64 b) {
+  c_v64 t;
+  t.u64 = a.u64 | b.u64;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_xor(c_v64 a, c_v64 b) {
+  c_v64 t;
+  t.u64 = a.u64 ^ b.u64;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_and(c_v64 a, c_v64 b) {
+  c_v64 t;
+  t.u64 = a.u64 & b.u64;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_andn(c_v64 a, c_v64 b) {
+  c_v64 t;
+  t.u64 = a.u64 & ~b.u64;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_mullo_s16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s16[c] = (int16_t)(a.s16[c] * b.s16[c]);
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_mulhi_s16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s16[c] = (a.s16[c] * b.s16[c]) >> 16;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_mullo_s32(c_v64 a, c_v64 b) {
+  c_v64 t;
+  t.s32[0] = (int32_t)((int64_t)a.s32[0] * b.s32[0]);
+  t.s32[1] = (int32_t)((int64_t)a.s32[1] * b.s32[1]);
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_madd_s16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  t.s32[0] = a.s16[0] * b.s16[0] + a.s16[1] * b.s16[1];
+  t.s32[1] = a.s16[2] * b.s16[2] + a.s16[3] * b.s16[3];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_madd_us8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int32_t u;
+  u = a.u8[0] * b.s8[0] + a.u8[1] * b.s8[1];
+  t.s16[0] = u > 32767 ? 32767 : u < -32768 ? -32768 : u;
+  u = a.u8[2] * b.s8[2] + a.u8[3] * b.s8[3];
+  t.s16[1] = u > 32767 ? 32767 : u < -32768 ? -32768 : u;
+  u = a.u8[4] * b.s8[4] + a.u8[5] * b.s8[5];
+  t.s16[2] = u > 32767 ? 32767 : u < -32768 ? -32768 : u;
+  u = a.u8[6] * b.s8[6] + a.u8[7] * b.s8[7];
+  t.s16[3] = u > 32767 ? 32767 : u < -32768 ? -32768 : u;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_avg_u8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.u8[c] = (a.u8[c] + b.u8[c] + 1) >> 1;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_rdavg_u8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.u8[c] = (a.u8[c] + b.u8[c]) >> 1;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_rdavg_u16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.u16[c] = (a.u16[c] + b.u16[c]) >> 1;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_avg_u16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.u16[c] = (a.u16[c] + b.u16[c] + 1) >> 1;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_min_u8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.u8[c] = a.u8[c] > b.u8[c] ? b.u8[c] : a.u8[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_max_u8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.u8[c] = a.u8[c] > b.u8[c] ? a.u8[c] : b.u8[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_min_s8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.s8[c] = a.s8[c] > b.s8[c] ? b.s8[c] : a.s8[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_max_s8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.s8[c] = a.s8[c] > b.s8[c] ? a.s8[c] : b.s8[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_min_s16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s16[c] = a.s16[c] > b.s16[c] ? b.s16[c] : a.s16[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_max_s16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s16[c] = a.s16[c] > b.s16[c] ? a.s16[c] : b.s16[c];
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_cmpgt_s8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.s8[c] = -(a.s8[c] > b.s8[c]);
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_cmplt_s8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.s8[c] = -(a.s8[c] < b.s8[c]);
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_cmpeq_8(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 8; c++) t.s8[c] = -(a.u8[c] == b.u8[c]);
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_cmpgt_s16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s16[c] = -(a.s16[c] > b.s16[c]);
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_cmplt_s16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s16[c] = -(a.s16[c] < b.s16[c]);
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_cmpeq_16(c_v64 a, c_v64 b) {
+  c_v64 t;
+  int c;
+  for (c = 0; c < 4; c++) t.s16[c] = -(a.u16[c] == b.u16[c]);
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shl_8(c_v64 a, unsigned int n) {
+  c_v64 t;
+  int c;
+  if (SIMD_CHECK && n > 7) {
+    fprintf(stderr, "Error: Undefined u8 shift left %d\n", n);
+    abort();
+  }
+  for (c = 0; c < 8; c++) t.s8[c] = a.u8[c] << n;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shr_u8(c_v64 a, unsigned int n) {
+  c_v64 t;
+  int c;
+  if (SIMD_CHECK && n > 7) {
+    fprintf(stderr, "Error: Undefined u8 shift right %d\n", n);
+    abort();
+  }
+  for (c = 0; c < 8; c++) t.u8[c] = a.u8[c] >> n;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shr_s8(c_v64 a, unsigned int n) {
+  c_v64 t;
+  int c;
+  if (SIMD_CHECK && n > 7) {
+    fprintf(stderr, "Error: Undefined s8 shift right %d\n", n);
+    abort();
+  }
+  for (c = 0; c < 8; c++) t.s8[c] = a.s8[c] >> n;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shl_16(c_v64 a, unsigned int n) {
+  c_v64 t;
+  int c;
+  if (SIMD_CHECK && n > 15) {
+    fprintf(stderr, "Error: Undefined u16 shift left %d\n", n);
+    abort();
+  }
+  for (c = 0; c < 4; c++) t.u16[c] = a.u16[c] << n;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shr_u16(c_v64 a, unsigned int n) {
+  c_v64 t;
+  int c;
+  if (SIMD_CHECK && n > 15) {
+    fprintf(stderr, "Error: Undefined u16 shift right %d\n", n);
+    abort();
+  }
+  for (c = 0; c < 4; c++) t.u16[c] = a.u16[c] >> n;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shr_s16(c_v64 a, unsigned int n) {
+  c_v64 t;
+  int c;
+  if (SIMD_CHECK && n > 15) {
+    fprintf(stderr, "Error: undefined s16 shift right %d\n", n);
+    abort();
+  }
+  for (c = 0; c < 4; c++) t.s16[c] = a.s16[c] >> n;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shl_32(c_v64 a, unsigned int n) {
+  c_v64 t;
+  if (SIMD_CHECK && n > 31) {
+    fprintf(stderr, "Error: undefined u32 shift left %d\n", n);
+    abort();
+  }
+  t.u32[1] = a.u32[1] << n;
+  t.u32[0] = a.u32[0] << n;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shr_u32(c_v64 a, unsigned int n) {
+  c_v64 t;
+  if (SIMD_CHECK && n > 31) {
+    fprintf(stderr, "Error: undefined u32 shift right %d\n", n);
+    abort();
+  }
+  t.u32[1] = a.u32[1] >> n;
+  t.u32[0] = a.u32[0] >> n;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shr_s32(c_v64 a, unsigned int n) {
+  c_v64 t;
+  if (SIMD_CHECK && n > 31) {
+    fprintf(stderr, "Error: undefined s32 shift right %d\n", n);
+    abort();
+  }
+  t.s32[1] = a.s32[1] >> n;
+  t.s32[0] = a.s32[0] >> n;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shr_n_byte(c_v64 x, unsigned int i) {
+  c_v64 t;
+  t.u64 = x.u64 >> i * 8;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_shl_n_byte(c_v64 x, unsigned int i) {
+  c_v64 t;
+  t.u64 = x.u64 << i * 8;
+  return t;
+}
+
+SIMD_INLINE c_v64 c_v64_align(c_v64 a, c_v64 b, unsigned int c) {
+  if (SIMD_CHECK && c > 7) {
+    fprintf(stderr, "Error: undefined alignment %d\n", c);
+    abort();
+  }
+  return c ? c_v64_or(c_v64_shr_n_byte(b, c), c_v64_shl_n_byte(a, 8 - c)) : b;
+}
+
+SIMD_INLINE c_v64 c_v64_shl_n_8(c_v64 a, unsigned int c) {
+  return c_v64_shl_8(a, c);
+}
+
+SIMD_INLINE c_v64 c_v64_shr_n_u8(c_v64 a, unsigned int c) {
+  return c_v64_shr_u8(a, c);
+}
+
+SIMD_INLINE c_v64 c_v64_shr_n_s8(c_v64 a, unsigned int c) {
+  return c_v64_shr_s8(a, c);
+}
+
+SIMD_INLINE c_v64 c_v64_shl_n_16(c_v64 a, unsigned int c) {
+  return c_v64_shl_16(a, c);
+}
+
+SIMD_INLINE c_v64 c_v64_shr_n_u16(c_v64 a, unsigned int c) {
+  return c_v64_shr_u16(a, c);
+}
+
+SIMD_INLINE c_v64 c_v64_shr_n_s16(c_v64 a, unsigned int c) {
+  return c_v64_shr_s16(a, c);
+}
+
+SIMD_INLINE c_v64 c_v64_shl_n_32(c_v64 a, unsigned int c) {
+  return c_v64_shl_32(a, c);
+}
+
+SIMD_INLINE c_v64 c_v64_shr_n_u32(c_v64 a, unsigned int c) {
+  return c_v64_shr_u32(a, c);
+}
+
+SIMD_INLINE c_v64 c_v64_shr_n_s32(c_v64 a, unsigned int c) {
+  return c_v64_shr_s32(a, c);
+}
+
+#endif  // AOM_AOM_DSP_SIMD_V64_INTRINSICS_C_H_
diff --git a/third_party/aom/aom_dsp/simd/v64_intrinsics_x86.h b/third_party/aom/aom_dsp/simd/v64_intrinsics_x86.h
new file mode 100644
index 0000000000..5f9a57b379
--- /dev/null
+++ b/third_party/aom/aom_dsp/simd/v64_intrinsics_x86.h
@@ -0,0 +1,491 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_SIMD_V64_INTRINSICS_X86_H_
+#define AOM_AOM_DSP_SIMD_V64_INTRINSICS_X86_H_
+
+#include <emmintrin.h>
+#if defined(__SSSE3__)
+#include <tmmintrin.h>
+#endif
+#if defined(__SSE4_1__)
+#include <smmintrin.h>
+#endif
+
+typedef __m128i v64;
+
+SIMD_INLINE uint32_t v64_low_u32(v64 a) {
+  return (uint32_t)_mm_cvtsi128_si32(a);
+}
+
+SIMD_INLINE uint32_t v64_high_u32(v64 a) {
+  return (uint32_t)_mm_cvtsi128_si32(_mm_srli_si128(a, 4));
+}
+
+SIMD_INLINE int32_t v64_low_s32(v64 a) { return (int32_t)_mm_cvtsi128_si32(a); }
+
+SIMD_INLINE int32_t v64_high_s32(v64 a) {
+  return (int32_t)_mm_cvtsi128_si32(_mm_srli_si128(a, 4));
+}
+
+SIMD_INLINE v64 v64_from_16(uint16_t a, uint16_t b, uint16_t c, uint16_t d) {
+  return _mm_packs_epi32(
+      _mm_set_epi32((int16_t)a, (int16_t)b, (int16_t)c, (int16_t)d),
+      _mm_setzero_si128());
+}
+
+SIMD_INLINE v64 v64_from_32(uint32_t x, uint32_t y) {
+  return _mm_set_epi32(0, 0, x, y);
+}
+
+SIMD_INLINE v64 v64_from_64(uint64_t x) {
+#ifdef __x86_64__
+  return _mm_cvtsi64_si128(x);
+#else
+  return _mm_set_epi32(0, 0, x >> 32, (uint32_t)x);
+#endif
+}
+
+SIMD_INLINE uint64_t v64_u64(v64 x) {
+  return (uint64_t)v64_low_u32(x) | ((uint64_t)v64_high_u32(x) << 32);
+}
+
+SIMD_INLINE uint32_t u32_load_aligned(const void *p) {
+  return *((uint32_t *)p);
+}
+
+SIMD_INLINE uint32_t u32_load_unaligned(const void *p) {
+  return *((uint32_t *)p);
+}
+
+SIMD_INLINE void u32_store_aligned(void *p, uint32_t a) {
+  *((uint32_t *)p) = a;
+}
+
+SIMD_INLINE void u32_store_unaligned(void *p, uint32_t a) {
+  *((uint32_t *)p) = a;
+}
+
+SIMD_INLINE v64 v64_load_aligned(const void *p) {
+  return _mm_loadl_epi64((__m128i *)p);
+}
+
+SIMD_INLINE v64 v64_load_unaligned(const void *p) {
+  return _mm_loadl_epi64((__m128i *)p);
+}
+
+SIMD_INLINE void v64_store_aligned(void *p, v64 a) {
+  _mm_storel_epi64((__m128i *)p, a);
+}
+
+SIMD_INLINE void v64_store_unaligned(void *p, v64 a) {
+  _mm_storel_epi64((__m128i *)p, a);
+}
+
+#if defined(__OPTIMIZE__) && __OPTIMIZE__ && !defined(__clang__)
+#define v64_align(a, b, c) \
+  ((c) ? _mm_srli_si128(_mm_unpacklo_epi64(b, a), (c)) : b)
+#else
+#define v64_align(a, b, c)                                                  \
+  ((c) ? v64_from_64((v64_u64(b) >> (c)*8) | (v64_u64(a) << (8 - (c)) * 8)) \
+       : (b))
+#endif
+
+SIMD_INLINE v64 v64_zero() { return _mm_setzero_si128(); }
+
+SIMD_INLINE v64 v64_dup_8(uint8_t x) { return _mm_set1_epi8(x); }
+
+SIMD_INLINE v64 v64_dup_16(uint16_t x) { return _mm_set1_epi16(x); }
+
+SIMD_INLINE v64 v64_dup_32(uint32_t x) { return _mm_set1_epi32(x); }
+
+SIMD_INLINE v64 v64_add_8(v64 a, v64 b) { return _mm_add_epi8(a, b); }
+
+SIMD_INLINE v64 v64_add_16(v64 a, v64 b) { return _mm_add_epi16(a, b); }
+
+SIMD_INLINE v64 v64_sadd_u8(v64 a, v64 b) { return _mm_adds_epu8(a, b); }
+
+SIMD_INLINE v64 v64_sadd_s8(v64 a, v64 b) { return _mm_adds_epi8(a, b); }
+
+SIMD_INLINE v64 v64_sadd_s16(v64 a, v64 b) { return _mm_adds_epi16(a, b); }
+
+SIMD_INLINE v64 v64_add_32(v64 a, v64 b) { return _mm_add_epi32(a, b); }
+
+SIMD_INLINE v64 v64_sub_8(v64 a, v64 b) { return _mm_sub_epi8(a, b); }
+
+SIMD_INLINE v64 v64_ssub_u8(v64 a, v64 b) { return _mm_subs_epu8(a, b); }
+
+SIMD_INLINE v64 v64_ssub_s8(v64 a, v64 b) { return _mm_subs_epi8(a, b); }
+
+SIMD_INLINE v64 v64_sub_16(v64 a, v64 b) { return _mm_sub_epi16(a, b); }
+
+SIMD_INLINE v64 v64_ssub_s16(v64 a, v64 b) { return _mm_subs_epi16(a, b); }
+
+SIMD_INLINE v64 v64_ssub_u16(v64 a, v64 b) { return _mm_subs_epu16(a, b); }
+
+SIMD_INLINE v64 v64_sub_32(v64 a, v64 b) { return _mm_sub_epi32(a, b); }
+
+SIMD_INLINE v64 v64_abs_s16(v64 a) {
+#if defined(__SSSE3__)
+  return _mm_abs_epi16(a);
+#else
+  return _mm_max_epi16(a, _mm_sub_epi16(_mm_setzero_si128(), a));
+#endif
+}
+
+SIMD_INLINE v64 v64_abs_s8(v64 a) {
+#if defined(__SSSE3__)
+  return _mm_abs_epi8(a);
+#else
+  v64 sign = _mm_cmplt_epi8(a, _mm_setzero_si128());
+  return _mm_xor_si128(sign, _mm_add_epi8(a, sign));
+#endif
+}
+
+SIMD_INLINE v64 v64_ziplo_8(v64 a, v64 b) { return _mm_unpacklo_epi8(b, a); }
+
+SIMD_INLINE v64 v64_ziphi_8(v64 a, v64 b) {
+  return _mm_srli_si128(_mm_unpacklo_epi8(b, a), 8);
+}
+
+SIMD_INLINE v64 v64_ziplo_16(v64 a, v64 b) { return _mm_unpacklo_epi16(b, a); }
+
+SIMD_INLINE v64 v64_ziphi_16(v64 a, v64 b) {
+  return _mm_srli_si128(_mm_unpacklo_epi16(b, a), 8);
+}
+
+SIMD_INLINE v64 v64_ziplo_32(v64 a, v64 b) { return _mm_unpacklo_epi32(b, a); }
+
+SIMD_INLINE v64 v64_ziphi_32(v64 a, v64 b) {
+  return _mm_srli_si128(_mm_unpacklo_epi32(b, a), 8);
+}
+
+SIMD_INLINE v64 v64_pack_s32_s16(v64 a, v64 b) {
+  __m128i t = _mm_unpacklo_epi64(b, a);
+  return _mm_packs_epi32(t, t);
+}
+
+SIMD_INLINE v64 v64_pack_s32_u16(v64 a, v64 b) {
+#if defined(__SSE4_1__)
+  __m128i t = _mm_unpacklo_epi64(b, a);
+  return _mm_packus_epi32(t, t);
+#else
+  int32_t ah = v64_high_u32(a);
+  int32_t al = v64_low_u32(a);
+  int32_t bh = v64_high_u32(b);
+  int32_t bl = v64_low_u32(b);
+  return v64_from_16(ah > 65535 ? 65535 : ah < 0 ? 0 : ah,
+                     al > 65535 ? 65535 : al < 0 ? 0 : al,
+                     bh > 65535 ? 65535 : bh < 0 ? 0 : bh,
+                     bl > 65535 ? 65535 : bl < 0 ? 0 : bl);
+#endif
+}
+
+SIMD_INLINE v64 v64_pack_s16_u8(v64 a, v64 b) {
+  __m128i t = _mm_unpacklo_epi64(b, a);
+  return _mm_packus_epi16(t, t);
+}
+
+SIMD_INLINE v64 v64_pack_s16_s8(v64 a, v64 b) {
+  __m128i t = _mm_unpacklo_epi64(b, a);
+  return _mm_packs_epi16(t, t);
+}
+
+SIMD_INLINE v64 v64_unziphi_8(v64 a, v64 b) {
+#if defined(__SSSE3__)
+  return _mm_shuffle_epi8(_mm_unpacklo_epi64(b, a),
+                          v64_from_64(0x0f0d0b0907050301LL));
+#else
+  return _mm_packus_epi16(
+      _mm_unpacklo_epi64(_mm_srli_epi16(b, 8), _mm_srli_epi16(a, 8)),
+      _mm_setzero_si128());
+#endif
+}
+
+SIMD_INLINE v64 v64_unziplo_8(v64 a, v64 b) {
+#if defined(__SSSE3__)
+  return _mm_shuffle_epi8(_mm_unpacklo_epi64(b, a),
+                          v64_from_64(0x0e0c0a0806040200LL));
+#else
+  return v64_unziphi_8(_mm_slli_si128(a, 1), _mm_slli_si128(b, 1));
+#endif
+}
+
+SIMD_INLINE v64 v64_unziphi_16(v64 a, v64 b) {
+#if defined(__SSSE3__)
+  return _mm_shuffle_epi8(_mm_unpacklo_epi64(b, a),
+                          v64_from_64(0x0f0e0b0a07060302LL));
+#else
+  return _mm_packs_epi32(
+      _mm_unpacklo_epi64(_mm_srai_epi32(b, 16), _mm_srai_epi32(a, 16)),
+      _mm_setzero_si128());
+#endif
+}
+
+SIMD_INLINE v64 v64_unziplo_16(v64 a, v64 b) {
+#if defined(__SSSE3__)
+  return _mm_shuffle_epi8(_mm_unpacklo_epi64(b, a),
+                          v64_from_64(0x0d0c090805040100LL));
+#else
+  return v64_unziphi_16(_mm_slli_si128(a, 2), _mm_slli_si128(b, 2));
+#endif
+}
+
+SIMD_INLINE v64 v64_unpacklo_u8_s16(v64 a) {
+  return _mm_unpacklo_epi8(a, _mm_setzero_si128());
+}
+
+SIMD_INLINE v64 v64_unpackhi_u8_s16(v64 a) {
+  return _mm_srli_si128(_mm_unpacklo_epi8(a, _mm_setzero_si128()), 8);
+}
+
+SIMD_INLINE v64 v64_unpacklo_s8_s16(v64 a) {
+  return _mm_srai_epi16(_mm_unpacklo_epi8(a, a), 8);
+}
+
+SIMD_INLINE v64 v64_unpackhi_s8_s16(v64 a) {
+  return _mm_srli_si128(_mm_srai_epi16(_mm_unpacklo_epi8(a, a), 8), 8);
+}
+
+SIMD_INLINE v64 v64_unpacklo_u16_s32(v64 a) {
+  return _mm_unpacklo_epi16(a, _mm_setzero_si128());
+}
+
+SIMD_INLINE v64 v64_unpacklo_s16_s32(v64 a) {
+  return _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), a), 16);
+}
+
+SIMD_INLINE v64 v64_unpackhi_u16_s32(v64 a) {
+  return _mm_srli_si128(_mm_unpacklo_epi16(a, _mm_setzero_si128()), 8);
+}
+
+SIMD_INLINE v64 v64_unpackhi_s16_s32(v64 a) {
+  return _mm_srli_si128(
+      _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), a), 16), 8);
+}
+
+SIMD_INLINE v64 v64_shuffle_8(v64 x, v64 pattern) {
+#if defined(__SSSE3__)
+  return _mm_shuffle_epi8(x, pattern);
+#else
+  v64 output;
+  unsigned char *input = (unsigned char *)&x;
+  unsigned char *index = (unsigned char *)&pattern;
+  char *selected = (char *)&output;
+  int counter;
+
+  for (counter = 0; counter < 8; counter++) {
+    selected[counter] = input[index[counter]];
+  }
+
+  return output;
+#endif
+}
+
+SIMD_INLINE int64_t v64_dotp_su8(v64 a, v64 b) {
+  __m128i t = _mm_madd_epi16(_mm_srai_epi16(_mm_unpacklo_epi8(a, a), 8),
+                             _mm_unpacklo_epi8(b, _mm_setzero_si128()));
+  t = _mm_add_epi32(t, _mm_srli_si128(t, 8));
+  t = _mm_add_epi32(t, _mm_srli_si128(t, 4));
+  return (int32_t)v64_low_u32(t);
+}
+
+SIMD_INLINE int64_t v64_dotp_s16(v64 a, v64 b) {
+  __m128i r = _mm_madd_epi16(a, b);
+#if defined(__SSE4_1__) && defined(__x86_64__)
+  __m128i x = _mm_cvtepi32_epi64(r);
+  return _mm_cvtsi128_si64(_mm_add_epi64(x, _mm_srli_si128(x, 8)));
+#else
+  return (int64_t)_mm_cvtsi128_si32(_mm_srli_si128(r, 4)) +
+         (int64_t)_mm_cvtsi128_si32(r);
+#endif
+}
+
+SIMD_INLINE uint64_t v64_hadd_u8(v64 a) {
+  return v64_low_u32(_mm_sad_epu8(a, _mm_setzero_si128()));
+}
+
+SIMD_INLINE int64_t v64_hadd_s16(v64 a) {
+  return v64_dotp_s16(a, v64_dup_16(1));
+}
+
+typedef v64 sad64_internal;
+
+SIMD_INLINE sad64_internal v64_sad_u8_init() { return _mm_setzero_si128(); }
+
+/* Implementation dependent return value.  Result must be finalised with
+   v64_sad_u8_sum().
+   The result for more than 32 v64_sad_u8() calls is undefined. */
+SIMD_INLINE sad64_internal v64_sad_u8(sad64_internal s, v64 a, v64 b) {
+  return _mm_add_epi64(s, _mm_sad_epu8(a, b));
+}
+
+SIMD_INLINE uint32_t v64_sad_u8_sum(sad64_internal s) { return v64_low_u32(s); }
+
+typedef v64 ssd64_internal;
+
+SIMD_INLINE ssd64_internal v64_ssd_u8_init() { return _mm_setzero_si128(); }
+
+/* Implementation dependent return value.  Result must be finalised with
+ * v64_ssd_u8_sum(). */
+SIMD_INLINE ssd64_internal v64_ssd_u8(ssd64_internal s, v64 a, v64 b) {
+  v64 l = v64_sub_16(v64_ziplo_8(v64_zero(), a), v64_ziplo_8(v64_zero(), b));
+  v64 h = v64_sub_16(v64_ziphi_8(v64_zero(), a), v64_ziphi_8(v64_zero(), b));
+  v64 r = v64_add_32(_mm_madd_epi16(l, l), _mm_madd_epi16(h, h));
+  return _mm_add_epi64(
+      s, v64_ziplo_32(v64_zero(), _mm_add_epi32(r, _mm_srli_si128(r, 4))));
+}
+
+SIMD_INLINE uint32_t v64_ssd_u8_sum(sad64_internal s) { return v64_low_u32(s); }
+
+SIMD_INLINE v64 v64_or(v64 a, v64 b) { return _mm_or_si128(a, b); }
+
+SIMD_INLINE v64 v64_xor(v64 a, v64 b) { return _mm_xor_si128(a, b); }
+
+SIMD_INLINE v64 v64_and(v64 a, v64 b) { return _mm_and_si128(a, b); }
+
+SIMD_INLINE v64 v64_andn(v64 a, v64 b) { return _mm_andnot_si128(b, a); }
+
+SIMD_INLINE v64 v64_mullo_s16(v64 a, v64 b) { return _mm_mullo_epi16(a, b); }
+
+SIMD_INLINE v64 v64_mulhi_s16(v64 a, v64 b) { return _mm_mulhi_epi16(a, b); }
+
+SIMD_INLINE v64 v64_mullo_s32(v64 a, v64 b) {
+#if defined(__SSE4_1__)
+  return _mm_mullo_epi32(a, b);
+#else
+  return _mm_unpacklo_epi32(
+      _mm_mul_epu32(a, b),
+      _mm_mul_epu32(_mm_srli_si128(a, 4), _mm_srli_si128(b, 4)));
+#endif
+}
+
+SIMD_INLINE v64 v64_madd_s16(v64 a, v64 b) { return _mm_madd_epi16(a, b); }
+
+SIMD_INLINE v64 v64_madd_us8(v64 a, v64 b) {
+#if defined(__SSSE3__)
+  return _mm_maddubs_epi16(a, b);
+#else
+  __m128i t = _mm_madd_epi16(_mm_unpacklo_epi8(a, _mm_setzero_si128()),
+                             _mm_srai_epi16(_mm_unpacklo_epi8(b, b), 8));
+  return _mm_packs_epi32(t, t);
+#endif
+}
+
+SIMD_INLINE v64 v64_avg_u8(v64 a, v64 b) { return _mm_avg_epu8(a, b); }
+
+SIMD_INLINE v64 v64_rdavg_u8(v64 a, v64 b) {
+  return _mm_sub_epi8(_mm_avg_epu8(a, b),
+                      _mm_and_si128(_mm_xor_si128(a, b), v64_dup_8(1)));
+}
+
+SIMD_INLINE v64 v64_rdavg_u16(v64 a, v64 b) {
+  return _mm_sub_epi16(_mm_avg_epu16(a, b),
+                       _mm_and_si128(_mm_xor_si128(a, b), v64_dup_16(1)));
+}
+
+SIMD_INLINE v64 v64_avg_u16(v64 a, v64 b) { return _mm_avg_epu16(a, b); }
+
+SIMD_INLINE v64 v64_min_u8(v64 a, v64 b) { return _mm_min_epu8(a, b); }
+
+SIMD_INLINE v64 v64_max_u8(v64 a, v64 b) { return _mm_max_epu8(a, b); }
+
+SIMD_INLINE v64 v64_min_s8(v64 a, v64 b) {
+#if defined(__SSE4_1__)
+  return _mm_min_epi8(a, b);
+#else
+  v64 mask = _mm_cmplt_epi8(a, b);
+  return _mm_or_si128(_mm_andnot_si128(mask, b), _mm_and_si128(mask, a));
+#endif
+}
+
+SIMD_INLINE v64 v64_max_s8(v64 a, v64 b) {
+#if defined(__SSE4_1__)
+  return _mm_max_epi8(a, b);
+#else
+  v64 mask = _mm_cmplt_epi8(b, a);
+  return _mm_or_si128(_mm_andnot_si128(mask, b), _mm_and_si128(mask, a));
+#endif
+}
+
+SIMD_INLINE v64 v64_min_s16(v64 a, v64 b) { return _mm_min_epi16(a, b); }
+
+SIMD_INLINE v64 v64_max_s16(v64 a, v64 b) { return _mm_max_epi16(a, b); }
+
+SIMD_INLINE v64 v64_cmpgt_s8(v64 a, v64 b) { return _mm_cmpgt_epi8(a, b); }
+
+SIMD_INLINE v64 v64_cmplt_s8(v64 a, v64 b) { return _mm_cmplt_epi8(a, b); }
+
+SIMD_INLINE v64 v64_cmpeq_8(v64 a, v64 b) { return _mm_cmpeq_epi8(a, b); }
+
+SIMD_INLINE v64 v64_cmpgt_s16(v64 a, v64 b) { return _mm_cmpgt_epi16(a, b); }
+
+SIMD_INLINE v64 v64_cmplt_s16(v64 a, v64 b) { return _mm_cmplt_epi16(a, b); }
+
+SIMD_INLINE v64 v64_cmpeq_16(v64 a, v64 b) { return _mm_cmpeq_epi16(a, b); }
+
+SIMD_INLINE v64 v64_shl_8(v64 a, unsigned int c) {
+  return _mm_and_si128(_mm_set1_epi8((uint8_t)(0xff << c)),
+                       _mm_sll_epi16(a, _mm_cvtsi32_si128(c)));
+}
+
+SIMD_INLINE v64 v64_shr_u8(v64 a, unsigned int c) {
+  return _mm_and_si128(_mm_set1_epi8(0xff >> c),
+                       _mm_srl_epi16(a, _mm_cvtsi32_si128(c)));
+}
+
+SIMD_INLINE v64 v64_shr_s8(v64 a, unsigned int c) {
+  return _mm_packs_epi16(
+      _mm_sra_epi16(_mm_unpacklo_epi8(a, a), _mm_cvtsi32_si128(c + 8)), a);
+}
+
+SIMD_INLINE v64 v64_shl_16(v64 a, unsigned int c) {
+  return _mm_sll_epi16(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v64 v64_shr_u16(v64 a, unsigned int c) {
+  return _mm_srl_epi16(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v64 v64_shr_s16(v64 a, unsigned int c) {
+  return _mm_sra_epi16(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v64 v64_shl_32(v64 a, unsigned int c) {
+  return _mm_sll_epi32(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v64 v64_shr_u32(v64 a, unsigned int c) {
+  return _mm_srl_epi32(a, _mm_cvtsi32_si128(c));
+}
+
+SIMD_INLINE v64 v64_shr_s32(v64 a, unsigned int c) {
+  return _mm_sra_epi32(a, _mm_cvtsi32_si128(c));
+}
+
+/* These intrinsics require immediate values, so we must use #defines
+   to enforce that. */
+#define v64_shl_n_byte(a, c) _mm_slli_si128(a, c)
+#define v64_shr_n_byte(a, c) _mm_srli_si128(_mm_unpacklo_epi64(a, a), c + 8)
+#define v64_shl_n_8(a, c) \
+  _mm_and_si128(_mm_set1_epi8((uint8_t)(0xff << (c))), _mm_slli_epi16(a, c))
+#define v64_shr_n_u8(a, c) \
+  _mm_and_si128(_mm_set1_epi8(0xff >> (c)), _mm_srli_epi16(a, c))
+#define v64_shr_n_s8(a, c) \
+  _mm_packs_epi16(_mm_srai_epi16(_mm_unpacklo_epi8(a, a), (c) + 8), a)
+#define v64_shl_n_16(a, c) _mm_slli_epi16(a, c)
+#define v64_shr_n_u16(a, c) _mm_srli_epi16(a, c)
+#define v64_shr_n_s16(a, c) _mm_srai_epi16(a, c)
+#define v64_shl_n_32(a, c) _mm_slli_epi32(a, c)
+#define v64_shr_n_u32(a, c) _mm_srli_epi32(a, c)
+#define v64_shr_n_s32(a, c) _mm_srai_epi32(a, c)
+
+#endif  // AOM_AOM_DSP_SIMD_V64_INTRINSICS_X86_H_