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-rw-r--r--third_party/aom/av1/common/arm/convolve_neon_dotprod.c793
1 files changed, 793 insertions, 0 deletions
diff --git a/third_party/aom/av1/common/arm/convolve_neon_dotprod.c b/third_party/aom/av1/common/arm/convolve_neon_dotprod.c
new file mode 100644
index 0000000000..c29229eb09
--- /dev/null
+++ b/third_party/aom/av1/common/arm/convolve_neon_dotprod.c
@@ -0,0 +1,793 @@
+/*
+ * Copyright (c) 2023, 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.
+ */
+
+#include <arm_neon.h>
+
+#include "config/aom_config.h"
+#include "config/av1_rtcd.h"
+
+#include "aom_dsp/aom_dsp_common.h"
+#include "aom_dsp/arm/mem_neon.h"
+#include "aom_ports/mem.h"
+#include "av1/common/arm/convolve_neon.h"
+#include "av1/common/convolve.h"
+#include "av1/common/filter.h"
+
+DECLARE_ALIGNED(16, static const uint8_t, dot_prod_permute_tbl[48]) = {
+ 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6,
+ 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10,
+ 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14
+};
+
+static INLINE int16x4_t convolve12_4_x(uint8x16_t samples,
+ const int8x16_t filter,
+ const int32x4_t correction,
+ const uint8x16_t range_limit,
+ const uint8x16x3_t permute_tbl) {
+ int8x16_t clamped_samples, permuted_samples[3];
+ int32x4_t sum;
+
+ // Clamp sample range to [-128, 127] for 8-bit signed dot product.
+ clamped_samples = vreinterpretq_s8_u8(vsubq_u8(samples, range_limit));
+
+ // Permute samples ready for dot product.
+ // { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 }
+ permuted_samples[0] = vqtbl1q_s8(clamped_samples, permute_tbl.val[0]);
+ // { 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10 }
+ permuted_samples[1] = vqtbl1q_s8(clamped_samples, permute_tbl.val[1]);
+ // { 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14 }
+ permuted_samples[2] = vqtbl1q_s8(clamped_samples, permute_tbl.val[2]);
+
+ // Accumulate dot product into 'correction' to account for range clamp.
+ // First 4 output values.
+ sum = vdotq_laneq_s32(correction, permuted_samples[0], filter, 0);
+ sum = vdotq_laneq_s32(sum, permuted_samples[1], filter, 1);
+ sum = vdotq_laneq_s32(sum, permuted_samples[2], filter, 2);
+
+ return vqrshrn_n_s32(sum, FILTER_BITS);
+}
+
+static INLINE uint8x8_t convolve12_8_x(uint8x16_t samples[2],
+ const int8x16_t filter,
+ const int32x4_t correction,
+ const uint8x16_t range_limit,
+ const uint8x16x3_t permute_tbl) {
+ int8x16_t clamped_samples[2], permuted_samples[4];
+ int32x4_t sum[2];
+
+ // Clamp sample range to [-128, 127] for 8-bit signed dot product.
+ clamped_samples[0] = vreinterpretq_s8_u8(vsubq_u8(samples[0], range_limit));
+ clamped_samples[1] = vreinterpretq_s8_u8(vsubq_u8(samples[1], range_limit));
+
+ // Permute samples ready for dot product.
+ // { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 }
+ permuted_samples[0] = vqtbl1q_s8(clamped_samples[0], permute_tbl.val[0]);
+ // { 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10 }
+ permuted_samples[1] = vqtbl1q_s8(clamped_samples[0], permute_tbl.val[1]);
+ // { 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14 }
+ permuted_samples[2] = vqtbl1q_s8(clamped_samples[0], permute_tbl.val[2]);
+ // {12, 13, 14, 15, 13, 14, 15, 16, 14, 15, 16, 17, 15, 16, 17, 18 }
+ permuted_samples[3] = vqtbl1q_s8(clamped_samples[1], permute_tbl.val[2]);
+
+ // Accumulate dot product into 'correction' to account for range clamp.
+ // First 4 output values.
+ sum[0] = vdotq_laneq_s32(correction, permuted_samples[0], filter, 0);
+ sum[0] = vdotq_laneq_s32(sum[0], permuted_samples[1], filter, 1);
+ sum[0] = vdotq_laneq_s32(sum[0], permuted_samples[2], filter, 2);
+ // Second 4 output values.
+ sum[1] = vdotq_laneq_s32(correction, permuted_samples[1], filter, 0);
+ sum[1] = vdotq_laneq_s32(sum[1], permuted_samples[2], filter, 1);
+ sum[1] = vdotq_laneq_s32(sum[1], permuted_samples[3], filter, 2);
+
+ // Narrow and re-pack.
+ int16x8_t sum_s16 = vcombine_s16(vqrshrn_n_s32(sum[0], FILTER_BITS),
+ vqrshrn_n_s32(sum[1], FILTER_BITS));
+ return vqmovun_s16(sum_s16);
+}
+
+static INLINE void convolve_x_sr_12tap_neon_dotprod(
+ const uint8_t *src, int src_stride, uint8_t *dst, int dst_stride, int w,
+ int h, const int16_t *x_filter_ptr) {
+ const int16x8_t filter_0_7 = vld1q_s16(x_filter_ptr);
+ const int16x4_t filter_8_11 = vld1_s16(x_filter_ptr + 8);
+ const int16x8_t filter_8_15 = vcombine_s16(filter_8_11, vdup_n_s16(0));
+ const int8x16_t filter =
+ vcombine_s8(vmovn_s16(filter_0_7), vmovn_s16(filter_8_15));
+
+ const int32_t correction_s32 =
+ vaddvq_s32(vaddq_s32(vpaddlq_s16(vshlq_n_s16(filter_0_7, FILTER_BITS)),
+ vpaddlq_s16(vshlq_n_s16(filter_8_15, FILTER_BITS))));
+ // A shim of 1 << (ROUND0_BITS - 1) enables us to use a single rounding right
+ // shift by FILTER_BITS - instead of a first rounding right shift by
+ // ROUND0_BITS, followed by second rounding right shift by FILTER_BITS -
+ // ROUND0_BITS.
+ int32x4_t correction = vdupq_n_s32(correction_s32 + (1 << (ROUND0_BITS - 1)));
+ const uint8x16_t range_limit = vdupq_n_u8(128);
+ const uint8x16x3_t permute_tbl = vld1q_u8_x3(dot_prod_permute_tbl);
+
+ // Special case the following no-op filter as 128 won't fit into the
+ // 8-bit signed dot-product instruction:
+ // { 0, 0, 0, 0, 0, 128, 0, 0, 0, 0, 0, 0 }
+ if (vgetq_lane_s16(filter_0_7, 5) == 128) {
+ // Undo the horizontal offset in the calling function.
+ src += 5;
+
+ do {
+ const uint8_t *s = src;
+ uint8_t *d = dst;
+ int width = w;
+
+ do {
+ uint8x8_t d0 = vld1_u8(s);
+ if (w == 4) {
+ store_u8_4x1(d, d0);
+ } else {
+ vst1_u8(d, d0);
+ }
+
+ s += 8;
+ d += 8;
+ width -= 8;
+ } while (width > 0);
+ src += src_stride;
+ dst += dst_stride;
+ } while (--h != 0);
+ } else {
+ if (w <= 4) {
+ do {
+ uint8x16_t s0, s1, s2, s3;
+ load_u8_16x4(src, src_stride, &s0, &s1, &s2, &s3);
+
+ int16x4_t d0 =
+ convolve12_4_x(s0, filter, correction, range_limit, permute_tbl);
+ int16x4_t d1 =
+ convolve12_4_x(s1, filter, correction, range_limit, permute_tbl);
+ int16x4_t d2 =
+ convolve12_4_x(s2, filter, correction, range_limit, permute_tbl);
+ int16x4_t d3 =
+ convolve12_4_x(s3, filter, correction, range_limit, permute_tbl);
+
+ uint8x8_t d01 = vqmovun_s16(vcombine_s16(d0, d1));
+ uint8x8_t d23 = vqmovun_s16(vcombine_s16(d2, d3));
+
+ store_u8x4_strided_x2(dst + 0 * dst_stride, dst_stride, d01);
+ store_u8x4_strided_x2(dst + 2 * dst_stride, dst_stride, d23);
+
+ dst += 4 * dst_stride;
+ src += 4 * src_stride;
+ h -= 4;
+ } while (h != 0);
+ } else {
+ do {
+ const uint8_t *s = src;
+ uint8_t *d = dst;
+ int width = w;
+
+ do {
+ uint8x16_t s0[2], s1[2], s2[2], s3[2];
+ load_u8_16x4(s, src_stride, &s0[0], &s1[0], &s2[0], &s3[0]);
+ load_u8_16x4(s + 4, src_stride, &s0[1], &s1[1], &s2[1], &s3[1]);
+
+ uint8x8_t d0 =
+ convolve12_8_x(s0, filter, correction, range_limit, permute_tbl);
+ uint8x8_t d1 =
+ convolve12_8_x(s1, filter, correction, range_limit, permute_tbl);
+ uint8x8_t d2 =
+ convolve12_8_x(s2, filter, correction, range_limit, permute_tbl);
+ uint8x8_t d3 =
+ convolve12_8_x(s3, filter, correction, range_limit, permute_tbl);
+
+ store_u8_8x4(d + 0 * dst_stride, dst_stride, d0, d1, d2, d3);
+
+ s += 8;
+ d += 8;
+ width -= 8;
+ } while (width != 0);
+ src += 4 * src_stride;
+ dst += 4 * dst_stride;
+ h -= 4;
+ } while (h != 0);
+ }
+ }
+}
+
+static INLINE int16x4_t convolve4_4_x(uint8x16_t samples, const int8x8_t filter,
+ const int32x4_t correction,
+ const uint8x16_t range_limit,
+ const uint8x16_t permute_tbl) {
+ // Clamp sample range to [-128, 127] for 8-bit signed dot product.
+ int8x16_t clamped_samples =
+ vreinterpretq_s8_u8(vsubq_u8(samples, range_limit));
+
+ // Permute samples ready for dot product.
+ // { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 }
+ int8x16_t permuted_samples = vqtbl1q_s8(clamped_samples, permute_tbl);
+
+ // Accumulate dot product into 'correction' to account for range clamp.
+ int32x4_t sum = vdotq_lane_s32(correction, permuted_samples, filter, 0);
+
+ // Packing is performed by the caller.
+ return vmovn_s32(sum);
+}
+
+static INLINE uint8x8_t convolve8_8_x(uint8x16_t samples, const int8x8_t filter,
+ const int32x4_t correction,
+ const uint8x16_t range_limit,
+ const uint8x16x3_t permute_tbl) {
+ int8x16_t clamped_samples, permuted_samples[3];
+ int32x4_t sum[2];
+
+ // Clamp sample range to [-128, 127] for 8-bit signed dot product.
+ clamped_samples = vreinterpretq_s8_u8(vsubq_u8(samples, range_limit));
+
+ // Permute samples ready for dot product. */
+ // { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 }
+ permuted_samples[0] = vqtbl1q_s8(clamped_samples, permute_tbl.val[0]);
+ // { 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10 }
+ permuted_samples[1] = vqtbl1q_s8(clamped_samples, permute_tbl.val[1]);
+ // { 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14 }
+ permuted_samples[2] = vqtbl1q_s8(clamped_samples, permute_tbl.val[2]);
+
+ // Accumulate dot product into 'correction' to account for range clamp.
+ // First 4 output values.
+ sum[0] = vdotq_lane_s32(correction, permuted_samples[0], filter, 0);
+ sum[0] = vdotq_lane_s32(sum[0], permuted_samples[1], filter, 1);
+ // Second 4 output values.
+ sum[1] = vdotq_lane_s32(correction, permuted_samples[1], filter, 0);
+ sum[1] = vdotq_lane_s32(sum[1], permuted_samples[2], filter, 1);
+
+ // Narrow and re-pack.
+ int16x8_t sum_s16 = vcombine_s16(vmovn_s32(sum[0]), vmovn_s32(sum[1]));
+ // We halved the convolution filter values so - 1 from the right shift.
+ return vqrshrun_n_s16(sum_s16, FILTER_BITS - 1);
+}
+
+void av1_convolve_x_sr_neon_dotprod(const uint8_t *src, int src_stride,
+ uint8_t *dst, int dst_stride, int w, int h,
+ const InterpFilterParams *filter_params_x,
+ const int subpel_x_qn,
+ ConvolveParams *conv_params) {
+ if (w == 2 || h == 2) {
+ av1_convolve_x_sr_c(src, src_stride, dst, dst_stride, w, h, filter_params_x,
+ subpel_x_qn, conv_params);
+ return;
+ }
+
+ const uint8_t horiz_offset = filter_params_x->taps / 2 - 1;
+ src -= horiz_offset;
+
+ const int16_t *x_filter_ptr = av1_get_interp_filter_subpel_kernel(
+ filter_params_x, subpel_x_qn & SUBPEL_MASK);
+
+ if (filter_params_x->taps > 8) {
+ convolve_x_sr_12tap_neon_dotprod(src, src_stride, dst, dst_stride, w, h,
+ x_filter_ptr);
+ return;
+ }
+
+ const int16x8_t x_filter_s16 = vld1q_s16(x_filter_ptr);
+ // Dot product constants.
+ const int32_t correction_s32 =
+ vaddlvq_s16(vshlq_n_s16(x_filter_s16, FILTER_BITS - 1));
+ // This shim of (1 << ((ROUND0_BITS - 1) - 1) enables us to use a single
+ // rounding right shift by FILTER_BITS - instead of a first rounding right
+ // shift by ROUND0_BITS, followed by second rounding right shift by
+ // FILTER_BITS - ROUND0_BITS.
+ // The outermost -1 is needed because we will halve the filter values.
+ const int32x4_t correction =
+ vdupq_n_s32(correction_s32 + (1 << ((ROUND0_BITS - 1) - 1)));
+ const uint8x16_t range_limit = vdupq_n_u8(128);
+
+ if (w <= 4) {
+ const uint8x16_t permute_tbl = vld1q_u8(dot_prod_permute_tbl);
+ // 4-tap filters are used for blocks having width <= 4.
+ // Filter values are even, so halve to reduce intermediate precision reqs.
+ const int8x8_t x_filter =
+ vshrn_n_s16(vcombine_s16(vld1_s16(x_filter_ptr + 2), vdup_n_s16(0)), 1);
+
+ src += 2;
+
+ do {
+ uint8x16_t s0, s1, s2, s3;
+ load_u8_16x4(src, src_stride, &s0, &s1, &s2, &s3);
+
+ int16x4_t d0 =
+ convolve4_4_x(s0, x_filter, correction, range_limit, permute_tbl);
+ int16x4_t d1 =
+ convolve4_4_x(s1, x_filter, correction, range_limit, permute_tbl);
+ int16x4_t d2 =
+ convolve4_4_x(s2, x_filter, correction, range_limit, permute_tbl);
+ int16x4_t d3 =
+ convolve4_4_x(s3, x_filter, correction, range_limit, permute_tbl);
+
+ // We halved the convolution filter values so - 1 from the right shift.
+ uint8x8_t d01 = vqrshrun_n_s16(vcombine_s16(d0, d1), FILTER_BITS - 1);
+ uint8x8_t d23 = vqrshrun_n_s16(vcombine_s16(d2, d3), FILTER_BITS - 1);
+
+ store_u8x4_strided_x2(dst + 0 * dst_stride, dst_stride, d01);
+ store_u8x4_strided_x2(dst + 2 * dst_stride, dst_stride, d23);
+
+ src += 4 * src_stride;
+ dst += 4 * dst_stride;
+ h -= 4;
+ } while (h != 0);
+ } else {
+ const uint8x16x3_t permute_tbl = vld1q_u8_x3(dot_prod_permute_tbl);
+ // Filter values are even, so halve to reduce intermediate precision reqs.
+ const int8x8_t x_filter = vshrn_n_s16(x_filter_s16, 1);
+
+ do {
+ int width = w;
+ const uint8_t *s = src;
+ uint8_t *d = dst;
+
+ do {
+ uint8x16_t s0, s1, s2, s3;
+ load_u8_16x4(s, src_stride, &s0, &s1, &s2, &s3);
+
+ uint8x8_t d0 =
+ convolve8_8_x(s0, x_filter, correction, range_limit, permute_tbl);
+ uint8x8_t d1 =
+ convolve8_8_x(s1, x_filter, correction, range_limit, permute_tbl);
+ uint8x8_t d2 =
+ convolve8_8_x(s2, x_filter, correction, range_limit, permute_tbl);
+ uint8x8_t d3 =
+ convolve8_8_x(s3, x_filter, correction, range_limit, permute_tbl);
+
+ store_u8_8x4(d, dst_stride, d0, d1, d2, d3);
+
+ s += 8;
+ d += 8;
+ width -= 8;
+ } while (width != 0);
+ src += 4 * src_stride;
+ dst += 4 * dst_stride;
+ h -= 4;
+ } while (h != 0);
+ }
+}
+
+static INLINE int16x4_t convolve12_4_2d_h(uint8x16_t samples,
+ const int8x16_t filters,
+ const int32x4_t correction,
+ const uint8x16_t range_limit,
+ const uint8x16x3_t permute_tbl) {
+ int8x16_t clamped_samples, permuted_samples[3];
+ int32x4_t sum;
+
+ // Clamp sample range to [-128, 127] for 8-bit signed dot product.
+ clamped_samples = vreinterpretq_s8_u8(vsubq_u8(samples, range_limit));
+
+ // Permute samples ready for dot product.
+ // { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 }
+ permuted_samples[0] = vqtbl1q_s8(clamped_samples, permute_tbl.val[0]);
+ // { 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10 }
+ permuted_samples[1] = vqtbl1q_s8(clamped_samples, permute_tbl.val[1]);
+ // { 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14 }
+ permuted_samples[2] = vqtbl1q_s8(clamped_samples, permute_tbl.val[2]);
+
+ // Accumulate dot product into 'correction' to account for range clamp.
+ // First 4 output values.
+ sum = vdotq_laneq_s32(correction, permuted_samples[0], filters, 0);
+ sum = vdotq_laneq_s32(sum, permuted_samples[1], filters, 1);
+ sum = vdotq_laneq_s32(sum, permuted_samples[2], filters, 2);
+
+ // Narrow and re-pack.
+ return vshrn_n_s32(sum, ROUND0_BITS);
+}
+
+static INLINE int16x8_t convolve12_8_2d_h(uint8x16_t samples[2],
+ const int8x16_t filters,
+ const int32x4_t correction,
+ const uint8x16_t range_limit,
+ const uint8x16x3_t permute_tbl) {
+ int8x16_t clamped_samples[2], permuted_samples[4];
+ int32x4_t sum[2];
+
+ // Clamp sample range to [-128, 127] for 8-bit signed dot product.
+ clamped_samples[0] = vreinterpretq_s8_u8(vsubq_u8(samples[0], range_limit));
+ clamped_samples[1] = vreinterpretq_s8_u8(vsubq_u8(samples[1], range_limit));
+
+ // Permute samples ready for dot product.
+ // { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 }
+ permuted_samples[0] = vqtbl1q_s8(clamped_samples[0], permute_tbl.val[0]);
+ // { 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10 }
+ permuted_samples[1] = vqtbl1q_s8(clamped_samples[0], permute_tbl.val[1]);
+ // { 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14 }
+ permuted_samples[2] = vqtbl1q_s8(clamped_samples[0], permute_tbl.val[2]);
+ // {12, 13, 14, 15, 13, 14, 15, 16, 14, 15, 16, 17, 15, 16, 17, 18 }
+ permuted_samples[3] = vqtbl1q_s8(clamped_samples[1], permute_tbl.val[2]);
+
+ // Accumulate dot product into 'correction' to account for range clamp.
+ // First 4 output values.
+ sum[0] = vdotq_laneq_s32(correction, permuted_samples[0], filters, 0);
+ sum[0] = vdotq_laneq_s32(sum[0], permuted_samples[1], filters, 1);
+ sum[0] = vdotq_laneq_s32(sum[0], permuted_samples[2], filters, 2);
+ // Second 4 output values.
+ sum[1] = vdotq_laneq_s32(correction, permuted_samples[1], filters, 0);
+ sum[1] = vdotq_laneq_s32(sum[1], permuted_samples[2], filters, 1);
+ sum[1] = vdotq_laneq_s32(sum[1], permuted_samples[3], filters, 2);
+
+ // Narrow and re-pack.
+ return vcombine_s16(vshrn_n_s32(sum[0], ROUND0_BITS),
+ vshrn_n_s32(sum[1], ROUND0_BITS));
+}
+
+static INLINE void convolve_2d_sr_horiz_12tap_neon_dotprod(
+ const uint8_t *src_ptr, int src_stride, int16_t *dst_ptr,
+ const int dst_stride, int w, int h, const int16x8_t x_filter_0_7,
+ const int16x4_t x_filter_8_11) {
+ const int bd = 8;
+
+ // Special case the following no-op filter as 128 won't fit into the 8-bit
+ // signed dot-product instruction:
+ // { 0, 0, 0, 0, 0, 128, 0, 0, 0, 0, 0, 0 }
+ if (vgetq_lane_s16(x_filter_0_7, 5) == 128) {
+ const uint16x8_t horiz_const = vdupq_n_u16((1 << (bd - 1)));
+ // Undo the horizontal offset in the calling function.
+ src_ptr += 5;
+
+ do {
+ const uint8_t *s = src_ptr;
+ int16_t *d = dst_ptr;
+ int width = w;
+
+ do {
+ uint8x8_t s0 = vld1_u8(s);
+ uint16x8_t d0 = vaddw_u8(horiz_const, s0);
+ d0 = vshlq_n_u16(d0, FILTER_BITS - ROUND0_BITS);
+ // Store 8 elements to avoid additional branches. This is safe if the
+ // actual block width is < 8 because the intermediate buffer is large
+ // enough to accommodate 128x128 blocks.
+ vst1q_s16(d, vreinterpretq_s16_u16(d0));
+
+ d += 8;
+ s += 8;
+ width -= 8;
+ } while (width > 0);
+ src_ptr += src_stride;
+ dst_ptr += dst_stride;
+ } while (--h != 0);
+
+ } else {
+ // Narrow filter values to 8-bit.
+ const int16x8x2_t x_filter_s16 = {
+ { x_filter_0_7, vcombine_s16(x_filter_8_11, vdup_n_s16(0)) }
+ };
+ const int8x16_t x_filter = vcombine_s8(vmovn_s16(x_filter_s16.val[0]),
+ vmovn_s16(x_filter_s16.val[1]));
+
+ // This shim of 1 << (ROUND0_BITS - 1) enables us to use non-rounding shifts
+ // - which are generally faster than rounding shifts on modern CPUs.
+ const int32_t horiz_const =
+ ((1 << (bd + FILTER_BITS - 1)) + (1 << (ROUND0_BITS - 1)));
+ // Dot product constants.
+ const int32x4_t correct_tmp =
+ vaddq_s32(vpaddlq_s16(vshlq_n_s16(x_filter_s16.val[0], 7)),
+ vpaddlq_s16(vshlq_n_s16(x_filter_s16.val[1], 7)));
+ const int32x4_t correction =
+ vdupq_n_s32(vaddvq_s32(correct_tmp) + horiz_const);
+ const uint8x16_t range_limit = vdupq_n_u8(128);
+ const uint8x16x3_t permute_tbl = vld1q_u8_x3(dot_prod_permute_tbl);
+
+ if (w <= 4) {
+ do {
+ uint8x16_t s0, s1, s2, s3;
+ load_u8_16x4(src_ptr, src_stride, &s0, &s1, &s2, &s3);
+
+ int16x4_t d0 = convolve12_4_2d_h(s0, x_filter, correction, range_limit,
+ permute_tbl);
+ int16x4_t d1 = convolve12_4_2d_h(s1, x_filter, correction, range_limit,
+ permute_tbl);
+ int16x4_t d2 = convolve12_4_2d_h(s2, x_filter, correction, range_limit,
+ permute_tbl);
+ int16x4_t d3 = convolve12_4_2d_h(s3, x_filter, correction, range_limit,
+ permute_tbl);
+
+ store_s16_4x4(dst_ptr, dst_stride, d0, d1, d2, d3);
+
+ src_ptr += 4 * src_stride;
+ dst_ptr += 4 * dst_stride;
+ h -= 4;
+ } while (h > 4);
+
+ do {
+ uint8x16_t s0 = vld1q_u8(src_ptr);
+ int16x4_t d0 = convolve12_4_2d_h(s0, x_filter, correction, range_limit,
+ permute_tbl);
+ vst1_s16(dst_ptr, d0);
+
+ src_ptr += src_stride;
+ dst_ptr += dst_stride;
+ } while (--h != 0);
+
+ } else {
+ do {
+ const uint8_t *s = src_ptr;
+ int16_t *d = dst_ptr;
+ int width = w;
+
+ do {
+ uint8x16_t s0[2], s1[2], s2[2], s3[2];
+ load_u8_16x4(s, src_stride, &s0[0], &s1[0], &s2[0], &s3[0]);
+ load_u8_16x4(s + 4, src_stride, &s0[1], &s1[1], &s2[1], &s3[1]);
+
+ int16x8_t d0 = convolve12_8_2d_h(s0, x_filter, correction,
+ range_limit, permute_tbl);
+ int16x8_t d1 = convolve12_8_2d_h(s1, x_filter, correction,
+ range_limit, permute_tbl);
+ int16x8_t d2 = convolve12_8_2d_h(s2, x_filter, correction,
+ range_limit, permute_tbl);
+ int16x8_t d3 = convolve12_8_2d_h(s3, x_filter, correction,
+ range_limit, permute_tbl);
+
+ store_s16_8x4(d, dst_stride, d0, d1, d2, d3);
+
+ s += 8;
+ d += 8;
+ width -= 8;
+ } while (width != 0);
+ src_ptr += 4 * src_stride;
+ dst_ptr += 4 * dst_stride;
+ h -= 4;
+ } while (h > 4);
+
+ do {
+ const uint8_t *s = src_ptr;
+ int16_t *d = dst_ptr;
+ int width = w;
+
+ do {
+ uint8x16_t s0[2];
+ s0[0] = vld1q_u8(s);
+ s0[1] = vld1q_u8(s + 4);
+ int16x8_t d0 = convolve12_8_2d_h(s0, x_filter, correction,
+ range_limit, permute_tbl);
+ vst1q_s16(d, d0);
+
+ s += 8;
+ d += 8;
+ width -= 8;
+ } while (width != 0);
+ src_ptr += src_stride;
+ dst_ptr += dst_stride;
+ } while (--h != 0);
+ }
+ }
+}
+
+static INLINE int16x4_t convolve4_4_2d_h(uint8x16_t samples,
+ const int8x8_t filters,
+ const int32x4_t correction,
+ const uint8x16_t range_limit,
+ const uint8x16_t permute_tbl) {
+ // Clamp sample range to [-128, 127] for 8-bit signed dot product.
+ int8x16_t clamped_samples =
+ vreinterpretq_s8_u8(vsubq_u8(samples, range_limit));
+
+ // Permute samples ready for dot product.
+ // { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 }
+ int8x16_t permuted_samples = vqtbl1q_s8(clamped_samples, permute_tbl);
+
+ // Accumulate dot product into 'correction' to account for range clamp.
+ int32x4_t sum = vdotq_lane_s32(correction, permuted_samples, filters, 0);
+
+ // We halved the convolution filter values so -1 from the right shift.
+ return vshrn_n_s32(sum, ROUND0_BITS - 1);
+}
+
+static INLINE int16x8_t convolve8_8_2d_h(uint8x16_t samples,
+ const int8x8_t filters,
+ const int32x4_t correction,
+ const uint8x16_t range_limit,
+ const uint8x16x3_t permute_tbl) {
+ int8x16_t clamped_samples, permuted_samples[3];
+ int32x4_t sum[2];
+
+ // Clamp sample range to [-128, 127] for 8-bit signed dot product.
+ clamped_samples = vreinterpretq_s8_u8(vsubq_u8(samples, range_limit));
+
+ // Permute samples ready for dot product.
+ // { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 }
+ permuted_samples[0] = vqtbl1q_s8(clamped_samples, permute_tbl.val[0]);
+ // { 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10 }
+ permuted_samples[1] = vqtbl1q_s8(clamped_samples, permute_tbl.val[1]);
+ // { 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14 }
+ permuted_samples[2] = vqtbl1q_s8(clamped_samples, permute_tbl.val[2]);
+
+ // Accumulate dot product into 'correction' to account for range clamp.
+ // First 4 output values.
+ sum[0] = vdotq_lane_s32(correction, permuted_samples[0], filters, 0);
+ sum[0] = vdotq_lane_s32(sum[0], permuted_samples[1], filters, 1);
+ // Second 4 output values.
+ sum[1] = vdotq_lane_s32(correction, permuted_samples[1], filters, 0);
+ sum[1] = vdotq_lane_s32(sum[1], permuted_samples[2], filters, 1);
+
+ // Narrow and re-pack.
+ // We halved the convolution filter values so -1 from the right shift.
+ return vcombine_s16(vshrn_n_s32(sum[0], ROUND0_BITS - 1),
+ vshrn_n_s32(sum[1], ROUND0_BITS - 1));
+}
+
+static INLINE void convolve_2d_sr_horiz_neon_dotprod(
+ const uint8_t *src, int src_stride, int16_t *im_block, int im_stride, int w,
+ int im_h, const int16_t *x_filter_ptr) {
+ const int bd = 8;
+ // This shim of 1 << ((ROUND0_BITS - 1) - 1) enables us to use non-rounding
+ // shifts - which are generally faster than rounding shifts on modern CPUs.
+ // The outermost -1 is needed because we halved the filter values.
+ const int32_t horiz_const =
+ ((1 << (bd + FILTER_BITS - 2)) + (1 << ((ROUND0_BITS - 1) - 1)));
+ // Dot product constants.
+ const int16x8_t x_filter_s16 = vld1q_s16(x_filter_ptr);
+ const int32_t correction_s32 =
+ vaddlvq_s16(vshlq_n_s16(x_filter_s16, FILTER_BITS - 1));
+ const int32x4_t correction = vdupq_n_s32(correction_s32 + horiz_const);
+ const uint8x16_t range_limit = vdupq_n_u8(128);
+
+ const uint8_t *src_ptr = src;
+ int16_t *dst_ptr = im_block;
+ int dst_stride = im_stride;
+ int height = im_h;
+
+ if (w <= 4) {
+ const uint8x16_t permute_tbl = vld1q_u8(dot_prod_permute_tbl);
+ // 4-tap filters are used for blocks having width <= 4.
+ // Filter values are even, so halve to reduce intermediate precision reqs.
+ const int8x8_t x_filter =
+ vshrn_n_s16(vcombine_s16(vld1_s16(x_filter_ptr + 2), vdup_n_s16(0)), 1);
+
+ src_ptr += 2;
+
+ do {
+ uint8x16_t s0, s1, s2, s3;
+ load_u8_16x4(src_ptr, src_stride, &s0, &s1, &s2, &s3);
+
+ int16x4_t d0 =
+ convolve4_4_2d_h(s0, x_filter, correction, range_limit, permute_tbl);
+ int16x4_t d1 =
+ convolve4_4_2d_h(s1, x_filter, correction, range_limit, permute_tbl);
+ int16x4_t d2 =
+ convolve4_4_2d_h(s2, x_filter, correction, range_limit, permute_tbl);
+ int16x4_t d3 =
+ convolve4_4_2d_h(s3, x_filter, correction, range_limit, permute_tbl);
+
+ store_s16_4x4(dst_ptr, dst_stride, d0, d1, d2, d3);
+
+ src_ptr += 4 * src_stride;
+ dst_ptr += 4 * dst_stride;
+ height -= 4;
+ } while (height > 4);
+
+ do {
+ uint8x16_t s0 = vld1q_u8(src_ptr);
+ int16x4_t d0 =
+ convolve4_4_2d_h(s0, x_filter, correction, range_limit, permute_tbl);
+ vst1_s16(dst_ptr, d0);
+
+ src_ptr += src_stride;
+ dst_ptr += dst_stride;
+ } while (--height != 0);
+ } else {
+ const uint8x16x3_t permute_tbl = vld1q_u8_x3(dot_prod_permute_tbl);
+ // Filter values are even, so halve to reduce intermediate precision reqs.
+ const int8x8_t x_filter = vshrn_n_s16(x_filter_s16, 1);
+
+ do {
+ const uint8_t *s = src_ptr;
+ int16_t *d = dst_ptr;
+ int width = w;
+
+ do {
+ uint8x16_t s0, s1, s2, s3;
+ load_u8_16x4(s, src_stride, &s0, &s1, &s2, &s3);
+
+ int16x8_t d0 = convolve8_8_2d_h(s0, x_filter, correction, range_limit,
+ permute_tbl);
+ int16x8_t d1 = convolve8_8_2d_h(s1, x_filter, correction, range_limit,
+ permute_tbl);
+ int16x8_t d2 = convolve8_8_2d_h(s2, x_filter, correction, range_limit,
+ permute_tbl);
+ int16x8_t d3 = convolve8_8_2d_h(s3, x_filter, correction, range_limit,
+ permute_tbl);
+
+ store_s16_8x4(d, dst_stride, d0, d1, d2, d3);
+
+ s += 8;
+ d += 8;
+ width -= 8;
+ } while (width != 0);
+ src_ptr += 4 * src_stride;
+ dst_ptr += 4 * dst_stride;
+ height -= 4;
+ } while (height > 4);
+
+ do {
+ const uint8_t *s = src_ptr;
+ int16_t *d = dst_ptr;
+ int width = w;
+
+ do {
+ uint8x16_t s0 = vld1q_u8(s);
+ int16x8_t d0 = convolve8_8_2d_h(s0, x_filter, correction, range_limit,
+ permute_tbl);
+ vst1q_s16(d, d0);
+
+ s += 8;
+ d += 8;
+ width -= 8;
+ } while (width != 0);
+ src_ptr += src_stride;
+ dst_ptr += dst_stride;
+ } while (--height != 0);
+ }
+}
+
+void av1_convolve_2d_sr_neon_dotprod(const uint8_t *src, int src_stride,
+ uint8_t *dst, int dst_stride, int w, int h,
+ const InterpFilterParams *filter_params_x,
+ const InterpFilterParams *filter_params_y,
+ const int subpel_x_qn,
+ const int subpel_y_qn,
+ ConvolveParams *conv_params) {
+ if (w == 2 || h == 2) {
+ av1_convolve_2d_sr_c(src, src_stride, dst, dst_stride, w, h,
+ filter_params_x, filter_params_y, subpel_x_qn,
+ subpel_y_qn, conv_params);
+ return;
+ }
+
+ const int y_filter_taps = get_filter_tap(filter_params_y, subpel_y_qn);
+ const int clamped_y_taps = y_filter_taps < 6 ? 6 : y_filter_taps;
+ const int im_h = h + clamped_y_taps - 1;
+ const int im_stride = MAX_SB_SIZE;
+ const int vert_offset = clamped_y_taps / 2 - 1;
+ const int horiz_offset = filter_params_x->taps / 2 - 1;
+ const uint8_t *src_ptr = src - vert_offset * src_stride - horiz_offset;
+
+ const int16_t *x_filter_ptr = av1_get_interp_filter_subpel_kernel(
+ filter_params_x, subpel_x_qn & SUBPEL_MASK);
+ const int16_t *y_filter_ptr = av1_get_interp_filter_subpel_kernel(
+ filter_params_y, subpel_y_qn & SUBPEL_MASK);
+
+ if (filter_params_x->taps > 8) {
+ DECLARE_ALIGNED(16, int16_t,
+ im_block[(MAX_SB_SIZE + MAX_FILTER_TAP - 1) * MAX_SB_SIZE]);
+
+ const int16x8_t x_filter_0_7 = vld1q_s16(x_filter_ptr);
+ const int16x4_t x_filter_8_11 = vld1_s16(x_filter_ptr + 8);
+ const int16x8_t y_filter_0_7 = vld1q_s16(y_filter_ptr);
+ const int16x4_t y_filter_8_11 = vld1_s16(y_filter_ptr + 8);
+
+ convolve_2d_sr_horiz_12tap_neon_dotprod(src_ptr, src_stride, im_block,
+ im_stride, w, im_h, x_filter_0_7,
+ x_filter_8_11);
+
+ convolve_2d_sr_vert_12tap_neon(im_block, im_stride, dst, dst_stride, w, h,
+ y_filter_0_7, y_filter_8_11);
+ } else {
+ DECLARE_ALIGNED(16, int16_t,
+ im_block[(MAX_SB_SIZE + SUBPEL_TAPS - 1) * MAX_SB_SIZE]);
+
+ convolve_2d_sr_horiz_neon_dotprod(src_ptr, src_stride, im_block, im_stride,
+ w, im_h, x_filter_ptr);
+
+ const int16x8_t y_filter = vld1q_s16(y_filter_ptr);
+
+ if (clamped_y_taps <= 6) {
+ convolve_2d_sr_vert_6tap_neon(im_block, im_stride, dst, dst_stride, w, h,
+ y_filter);
+ } else {
+ convolve_2d_sr_vert_8tap_neon(im_block, im_stride, dst, dst_stride, w, h,
+ y_filter);
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-27 09:01:26 +0000