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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
commit43a97878ce14b72f0981164f87f2e35e14151312 (patch)
tree620249daf56c0258faa40cbdcf9cfba06de2a846 /media/libwebp/src/dsp/enc_neon.c
parentInitial commit. (diff)
downloadfirefox-upstream.tar.xz
firefox-upstream.zip
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'media/libwebp/src/dsp/enc_neon.c')
-rw-r--r--media/libwebp/src/dsp/enc_neon.c938
1 files changed, 938 insertions, 0 deletions
diff --git a/media/libwebp/src/dsp/enc_neon.c b/media/libwebp/src/dsp/enc_neon.c
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+// Copyright 2012 Google Inc. All Rights Reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the COPYING file in the root of the source
+// tree. An additional intellectual property rights grant can be found
+// in the file PATENTS. All contributing project authors may
+// be found in the AUTHORS file in the root of the source tree.
+// -----------------------------------------------------------------------------
+//
+// ARM NEON version of speed-critical encoding functions.
+//
+// adapted from libvpx (https://www.webmproject.org/code/)
+
+#include "src/dsp/dsp.h"
+
+#if defined(WEBP_USE_NEON)
+
+#include <assert.h>
+
+#include "src/dsp/neon.h"
+#include "src/enc/vp8i_enc.h"
+
+//------------------------------------------------------------------------------
+// Transforms (Paragraph 14.4)
+
+// Inverse transform.
+// This code is pretty much the same as TransformOne in the dec_neon.c, except
+// for subtraction to *ref. See the comments there for algorithmic explanations.
+
+static const int16_t kC1 = 20091;
+static const int16_t kC2 = 17734; // half of kC2, actually. See comment above.
+
+// This code works but is *slower* than the inlined-asm version below
+// (with gcc-4.6). So we disable it for now. Later, it'll be conditional to
+// WEBP_USE_INTRINSICS define.
+// With gcc-4.8, it's a little faster speed than inlined-assembly.
+#if defined(WEBP_USE_INTRINSICS)
+
+// Treats 'v' as an uint8x8_t and zero extends to an int16x8_t.
+static WEBP_INLINE int16x8_t ConvertU8ToS16_NEON(uint32x2_t v) {
+ return vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_u32(v)));
+}
+
+// Performs unsigned 8b saturation on 'dst01' and 'dst23' storing the result
+// to the corresponding rows of 'dst'.
+static WEBP_INLINE void SaturateAndStore4x4_NEON(uint8_t* const dst,
+ const int16x8_t dst01,
+ const int16x8_t dst23) {
+ // Unsigned saturate to 8b.
+ const uint8x8_t dst01_u8 = vqmovun_s16(dst01);
+ const uint8x8_t dst23_u8 = vqmovun_s16(dst23);
+
+ // Store the results.
+ vst1_lane_u32((uint32_t*)(dst + 0 * BPS), vreinterpret_u32_u8(dst01_u8), 0);
+ vst1_lane_u32((uint32_t*)(dst + 1 * BPS), vreinterpret_u32_u8(dst01_u8), 1);
+ vst1_lane_u32((uint32_t*)(dst + 2 * BPS), vreinterpret_u32_u8(dst23_u8), 0);
+ vst1_lane_u32((uint32_t*)(dst + 3 * BPS), vreinterpret_u32_u8(dst23_u8), 1);
+}
+
+static WEBP_INLINE void Add4x4_NEON(const int16x8_t row01,
+ const int16x8_t row23,
+ const uint8_t* const ref,
+ uint8_t* const dst) {
+ uint32x2_t dst01 = vdup_n_u32(0);
+ uint32x2_t dst23 = vdup_n_u32(0);
+
+ // Load the source pixels.
+ dst01 = vld1_lane_u32((uint32_t*)(ref + 0 * BPS), dst01, 0);
+ dst23 = vld1_lane_u32((uint32_t*)(ref + 2 * BPS), dst23, 0);
+ dst01 = vld1_lane_u32((uint32_t*)(ref + 1 * BPS), dst01, 1);
+ dst23 = vld1_lane_u32((uint32_t*)(ref + 3 * BPS), dst23, 1);
+
+ {
+ // Convert to 16b.
+ const int16x8_t dst01_s16 = ConvertU8ToS16_NEON(dst01);
+ const int16x8_t dst23_s16 = ConvertU8ToS16_NEON(dst23);
+
+ // Descale with rounding.
+ const int16x8_t out01 = vrsraq_n_s16(dst01_s16, row01, 3);
+ const int16x8_t out23 = vrsraq_n_s16(dst23_s16, row23, 3);
+ // Add the inverse transform.
+ SaturateAndStore4x4_NEON(dst, out01, out23);
+ }
+}
+
+static WEBP_INLINE void Transpose8x2_NEON(const int16x8_t in0,
+ const int16x8_t in1,
+ int16x8x2_t* const out) {
+ // a0 a1 a2 a3 | b0 b1 b2 b3 => a0 b0 c0 d0 | a1 b1 c1 d1
+ // c0 c1 c2 c3 | d0 d1 d2 d3 a2 b2 c2 d2 | a3 b3 c3 d3
+ const int16x8x2_t tmp0 = vzipq_s16(in0, in1); // a0 c0 a1 c1 a2 c2 ...
+ // b0 d0 b1 d1 b2 d2 ...
+ *out = vzipq_s16(tmp0.val[0], tmp0.val[1]);
+}
+
+static WEBP_INLINE void TransformPass_NEON(int16x8x2_t* const rows) {
+ // {rows} = in0 | in4
+ // in8 | in12
+ // B1 = in4 | in12
+ const int16x8_t B1 =
+ vcombine_s16(vget_high_s16(rows->val[0]), vget_high_s16(rows->val[1]));
+ // C0 = kC1 * in4 | kC1 * in12
+ // C1 = kC2 * in4 | kC2 * in12
+ const int16x8_t C0 = vsraq_n_s16(B1, vqdmulhq_n_s16(B1, kC1), 1);
+ const int16x8_t C1 = vqdmulhq_n_s16(B1, kC2);
+ const int16x4_t a = vqadd_s16(vget_low_s16(rows->val[0]),
+ vget_low_s16(rows->val[1])); // in0 + in8
+ const int16x4_t b = vqsub_s16(vget_low_s16(rows->val[0]),
+ vget_low_s16(rows->val[1])); // in0 - in8
+ // c = kC2 * in4 - kC1 * in12
+ // d = kC1 * in4 + kC2 * in12
+ const int16x4_t c = vqsub_s16(vget_low_s16(C1), vget_high_s16(C0));
+ const int16x4_t d = vqadd_s16(vget_low_s16(C0), vget_high_s16(C1));
+ const int16x8_t D0 = vcombine_s16(a, b); // D0 = a | b
+ const int16x8_t D1 = vcombine_s16(d, c); // D1 = d | c
+ const int16x8_t E0 = vqaddq_s16(D0, D1); // a+d | b+c
+ const int16x8_t E_tmp = vqsubq_s16(D0, D1); // a-d | b-c
+ const int16x8_t E1 = vcombine_s16(vget_high_s16(E_tmp), vget_low_s16(E_tmp));
+ Transpose8x2_NEON(E0, E1, rows);
+}
+
+static void ITransformOne_NEON(const uint8_t* ref,
+ const int16_t* in, uint8_t* dst) {
+ int16x8x2_t rows;
+ INIT_VECTOR2(rows, vld1q_s16(in + 0), vld1q_s16(in + 8));
+ TransformPass_NEON(&rows);
+ TransformPass_NEON(&rows);
+ Add4x4_NEON(rows.val[0], rows.val[1], ref, dst);
+}
+
+#else
+
+static void ITransformOne_NEON(const uint8_t* ref,
+ const int16_t* in, uint8_t* dst) {
+ const int kBPS = BPS;
+ const int16_t kC1C2[] = { kC1, kC2, 0, 0 };
+
+ __asm__ volatile (
+ "vld1.16 {q1, q2}, [%[in]] \n"
+ "vld1.16 {d0}, [%[kC1C2]] \n"
+
+ // d2: in[0]
+ // d3: in[8]
+ // d4: in[4]
+ // d5: in[12]
+ "vswp d3, d4 \n"
+
+ // q8 = {in[4], in[12]} * kC1 * 2 >> 16
+ // q9 = {in[4], in[12]} * kC2 >> 16
+ "vqdmulh.s16 q8, q2, d0[0] \n"
+ "vqdmulh.s16 q9, q2, d0[1] \n"
+
+ // d22 = a = in[0] + in[8]
+ // d23 = b = in[0] - in[8]
+ "vqadd.s16 d22, d2, d3 \n"
+ "vqsub.s16 d23, d2, d3 \n"
+
+ // q8 = in[4]/[12] * kC1 >> 16
+ "vshr.s16 q8, q8, #1 \n"
+
+ // Add {in[4], in[12]} back after the multiplication.
+ "vqadd.s16 q8, q2, q8 \n"
+
+ // d20 = c = in[4]*kC2 - in[12]*kC1
+ // d21 = d = in[4]*kC1 + in[12]*kC2
+ "vqsub.s16 d20, d18, d17 \n"
+ "vqadd.s16 d21, d19, d16 \n"
+
+ // d2 = tmp[0] = a + d
+ // d3 = tmp[1] = b + c
+ // d4 = tmp[2] = b - c
+ // d5 = tmp[3] = a - d
+ "vqadd.s16 d2, d22, d21 \n"
+ "vqadd.s16 d3, d23, d20 \n"
+ "vqsub.s16 d4, d23, d20 \n"
+ "vqsub.s16 d5, d22, d21 \n"
+
+ "vzip.16 q1, q2 \n"
+ "vzip.16 q1, q2 \n"
+
+ "vswp d3, d4 \n"
+
+ // q8 = {tmp[4], tmp[12]} * kC1 * 2 >> 16
+ // q9 = {tmp[4], tmp[12]} * kC2 >> 16
+ "vqdmulh.s16 q8, q2, d0[0] \n"
+ "vqdmulh.s16 q9, q2, d0[1] \n"
+
+ // d22 = a = tmp[0] + tmp[8]
+ // d23 = b = tmp[0] - tmp[8]
+ "vqadd.s16 d22, d2, d3 \n"
+ "vqsub.s16 d23, d2, d3 \n"
+
+ "vshr.s16 q8, q8, #1 \n"
+ "vqadd.s16 q8, q2, q8 \n"
+
+ // d20 = c = in[4]*kC2 - in[12]*kC1
+ // d21 = d = in[4]*kC1 + in[12]*kC2
+ "vqsub.s16 d20, d18, d17 \n"
+ "vqadd.s16 d21, d19, d16 \n"
+
+ // d2 = tmp[0] = a + d
+ // d3 = tmp[1] = b + c
+ // d4 = tmp[2] = b - c
+ // d5 = tmp[3] = a - d
+ "vqadd.s16 d2, d22, d21 \n"
+ "vqadd.s16 d3, d23, d20 \n"
+ "vqsub.s16 d4, d23, d20 \n"
+ "vqsub.s16 d5, d22, d21 \n"
+
+ "vld1.32 d6[0], [%[ref]], %[kBPS] \n"
+ "vld1.32 d6[1], [%[ref]], %[kBPS] \n"
+ "vld1.32 d7[0], [%[ref]], %[kBPS] \n"
+ "vld1.32 d7[1], [%[ref]], %[kBPS] \n"
+
+ "sub %[ref], %[ref], %[kBPS], lsl #2 \n"
+
+ // (val) + 4 >> 3
+ "vrshr.s16 d2, d2, #3 \n"
+ "vrshr.s16 d3, d3, #3 \n"
+ "vrshr.s16 d4, d4, #3 \n"
+ "vrshr.s16 d5, d5, #3 \n"
+
+ "vzip.16 q1, q2 \n"
+ "vzip.16 q1, q2 \n"
+
+ // Must accumulate before saturating
+ "vmovl.u8 q8, d6 \n"
+ "vmovl.u8 q9, d7 \n"
+
+ "vqadd.s16 q1, q1, q8 \n"
+ "vqadd.s16 q2, q2, q9 \n"
+
+ "vqmovun.s16 d0, q1 \n"
+ "vqmovun.s16 d1, q2 \n"
+
+ "vst1.32 d0[0], [%[dst]], %[kBPS] \n"
+ "vst1.32 d0[1], [%[dst]], %[kBPS] \n"
+ "vst1.32 d1[0], [%[dst]], %[kBPS] \n"
+ "vst1.32 d1[1], [%[dst]] \n"
+
+ : [in] "+r"(in), [dst] "+r"(dst) // modified registers
+ : [kBPS] "r"(kBPS), [kC1C2] "r"(kC1C2), [ref] "r"(ref) // constants
+ : "memory", "q0", "q1", "q2", "q8", "q9", "q10", "q11" // clobbered
+ );
+}
+
+#endif // WEBP_USE_INTRINSICS
+
+static void ITransform_NEON(const uint8_t* ref,
+ const int16_t* in, uint8_t* dst, int do_two) {
+ ITransformOne_NEON(ref, in, dst);
+ if (do_two) {
+ ITransformOne_NEON(ref + 4, in + 16, dst + 4);
+ }
+}
+
+// Load all 4x4 pixels into a single uint8x16_t variable.
+static uint8x16_t Load4x4_NEON(const uint8_t* src) {
+ uint32x4_t out = vdupq_n_u32(0);
+ out = vld1q_lane_u32((const uint32_t*)(src + 0 * BPS), out, 0);
+ out = vld1q_lane_u32((const uint32_t*)(src + 1 * BPS), out, 1);
+ out = vld1q_lane_u32((const uint32_t*)(src + 2 * BPS), out, 2);
+ out = vld1q_lane_u32((const uint32_t*)(src + 3 * BPS), out, 3);
+ return vreinterpretq_u8_u32(out);
+}
+
+// Forward transform.
+
+#if defined(WEBP_USE_INTRINSICS)
+
+static WEBP_INLINE void Transpose4x4_S16_NEON(const int16x4_t A,
+ const int16x4_t B,
+ const int16x4_t C,
+ const int16x4_t D,
+ int16x8_t* const out01,
+ int16x8_t* const out32) {
+ const int16x4x2_t AB = vtrn_s16(A, B);
+ const int16x4x2_t CD = vtrn_s16(C, D);
+ const int32x2x2_t tmp02 = vtrn_s32(vreinterpret_s32_s16(AB.val[0]),
+ vreinterpret_s32_s16(CD.val[0]));
+ const int32x2x2_t tmp13 = vtrn_s32(vreinterpret_s32_s16(AB.val[1]),
+ vreinterpret_s32_s16(CD.val[1]));
+ *out01 = vreinterpretq_s16_s64(
+ vcombine_s64(vreinterpret_s64_s32(tmp02.val[0]),
+ vreinterpret_s64_s32(tmp13.val[0])));
+ *out32 = vreinterpretq_s16_s64(
+ vcombine_s64(vreinterpret_s64_s32(tmp13.val[1]),
+ vreinterpret_s64_s32(tmp02.val[1])));
+}
+
+static WEBP_INLINE int16x8_t DiffU8ToS16_NEON(const uint8x8_t a,
+ const uint8x8_t b) {
+ return vreinterpretq_s16_u16(vsubl_u8(a, b));
+}
+
+static void FTransform_NEON(const uint8_t* src, const uint8_t* ref,
+ int16_t* out) {
+ int16x8_t d0d1, d3d2; // working 4x4 int16 variables
+ {
+ const uint8x16_t S0 = Load4x4_NEON(src);
+ const uint8x16_t R0 = Load4x4_NEON(ref);
+ const int16x8_t D0D1 = DiffU8ToS16_NEON(vget_low_u8(S0), vget_low_u8(R0));
+ const int16x8_t D2D3 = DiffU8ToS16_NEON(vget_high_u8(S0), vget_high_u8(R0));
+ const int16x4_t D0 = vget_low_s16(D0D1);
+ const int16x4_t D1 = vget_high_s16(D0D1);
+ const int16x4_t D2 = vget_low_s16(D2D3);
+ const int16x4_t D3 = vget_high_s16(D2D3);
+ Transpose4x4_S16_NEON(D0, D1, D2, D3, &d0d1, &d3d2);
+ }
+ { // 1rst pass
+ const int32x4_t kCst937 = vdupq_n_s32(937);
+ const int32x4_t kCst1812 = vdupq_n_s32(1812);
+ const int16x8_t a0a1 = vaddq_s16(d0d1, d3d2); // d0+d3 | d1+d2 (=a0|a1)
+ const int16x8_t a3a2 = vsubq_s16(d0d1, d3d2); // d0-d3 | d1-d2 (=a3|a2)
+ const int16x8_t a0a1_2 = vshlq_n_s16(a0a1, 3);
+ const int16x4_t tmp0 = vadd_s16(vget_low_s16(a0a1_2),
+ vget_high_s16(a0a1_2));
+ const int16x4_t tmp2 = vsub_s16(vget_low_s16(a0a1_2),
+ vget_high_s16(a0a1_2));
+ const int32x4_t a3_2217 = vmull_n_s16(vget_low_s16(a3a2), 2217);
+ const int32x4_t a2_2217 = vmull_n_s16(vget_high_s16(a3a2), 2217);
+ const int32x4_t a2_p_a3 = vmlal_n_s16(a2_2217, vget_low_s16(a3a2), 5352);
+ const int32x4_t a3_m_a2 = vmlsl_n_s16(a3_2217, vget_high_s16(a3a2), 5352);
+ const int16x4_t tmp1 = vshrn_n_s32(vaddq_s32(a2_p_a3, kCst1812), 9);
+ const int16x4_t tmp3 = vshrn_n_s32(vaddq_s32(a3_m_a2, kCst937), 9);
+ Transpose4x4_S16_NEON(tmp0, tmp1, tmp2, tmp3, &d0d1, &d3d2);
+ }
+ { // 2nd pass
+ // the (1<<16) addition is for the replacement: a3!=0 <-> 1-(a3==0)
+ const int32x4_t kCst12000 = vdupq_n_s32(12000 + (1 << 16));
+ const int32x4_t kCst51000 = vdupq_n_s32(51000);
+ const int16x8_t a0a1 = vaddq_s16(d0d1, d3d2); // d0+d3 | d1+d2 (=a0|a1)
+ const int16x8_t a3a2 = vsubq_s16(d0d1, d3d2); // d0-d3 | d1-d2 (=a3|a2)
+ const int16x4_t a0_k7 = vadd_s16(vget_low_s16(a0a1), vdup_n_s16(7));
+ const int16x4_t out0 = vshr_n_s16(vadd_s16(a0_k7, vget_high_s16(a0a1)), 4);
+ const int16x4_t out2 = vshr_n_s16(vsub_s16(a0_k7, vget_high_s16(a0a1)), 4);
+ const int32x4_t a3_2217 = vmull_n_s16(vget_low_s16(a3a2), 2217);
+ const int32x4_t a2_2217 = vmull_n_s16(vget_high_s16(a3a2), 2217);
+ const int32x4_t a2_p_a3 = vmlal_n_s16(a2_2217, vget_low_s16(a3a2), 5352);
+ const int32x4_t a3_m_a2 = vmlsl_n_s16(a3_2217, vget_high_s16(a3a2), 5352);
+ const int16x4_t tmp1 = vaddhn_s32(a2_p_a3, kCst12000);
+ const int16x4_t out3 = vaddhn_s32(a3_m_a2, kCst51000);
+ const int16x4_t a3_eq_0 =
+ vreinterpret_s16_u16(vceq_s16(vget_low_s16(a3a2), vdup_n_s16(0)));
+ const int16x4_t out1 = vadd_s16(tmp1, a3_eq_0);
+ vst1_s16(out + 0, out0);
+ vst1_s16(out + 4, out1);
+ vst1_s16(out + 8, out2);
+ vst1_s16(out + 12, out3);
+ }
+}
+
+#else
+
+// adapted from vp8/encoder/arm/neon/shortfdct_neon.asm
+static const int16_t kCoeff16[] = {
+ 5352, 5352, 5352, 5352, 2217, 2217, 2217, 2217
+};
+static const int32_t kCoeff32[] = {
+ 1812, 1812, 1812, 1812,
+ 937, 937, 937, 937,
+ 12000, 12000, 12000, 12000,
+ 51000, 51000, 51000, 51000
+};
+
+static void FTransform_NEON(const uint8_t* src, const uint8_t* ref,
+ int16_t* out) {
+ const int kBPS = BPS;
+ const uint8_t* src_ptr = src;
+ const uint8_t* ref_ptr = ref;
+ const int16_t* coeff16 = kCoeff16;
+ const int32_t* coeff32 = kCoeff32;
+
+ __asm__ volatile (
+ // load src into q4, q5 in high half
+ "vld1.8 {d8}, [%[src_ptr]], %[kBPS] \n"
+ "vld1.8 {d10}, [%[src_ptr]], %[kBPS] \n"
+ "vld1.8 {d9}, [%[src_ptr]], %[kBPS] \n"
+ "vld1.8 {d11}, [%[src_ptr]] \n"
+
+ // load ref into q6, q7 in high half
+ "vld1.8 {d12}, [%[ref_ptr]], %[kBPS] \n"
+ "vld1.8 {d14}, [%[ref_ptr]], %[kBPS] \n"
+ "vld1.8 {d13}, [%[ref_ptr]], %[kBPS] \n"
+ "vld1.8 {d15}, [%[ref_ptr]] \n"
+
+ // Pack the high values in to q4 and q6
+ "vtrn.32 q4, q5 \n"
+ "vtrn.32 q6, q7 \n"
+
+ // d[0-3] = src - ref
+ "vsubl.u8 q0, d8, d12 \n"
+ "vsubl.u8 q1, d9, d13 \n"
+
+ // load coeff16 into q8(d16=5352, d17=2217)
+ "vld1.16 {q8}, [%[coeff16]] \n"
+
+ // load coeff32 high half into q9 = 1812, q10 = 937
+ "vld1.32 {q9, q10}, [%[coeff32]]! \n"
+
+ // load coeff32 low half into q11=12000, q12=51000
+ "vld1.32 {q11,q12}, [%[coeff32]] \n"
+
+ // part 1
+ // Transpose. Register dN is the same as dN in C
+ "vtrn.32 d0, d2 \n"
+ "vtrn.32 d1, d3 \n"
+ "vtrn.16 d0, d1 \n"
+ "vtrn.16 d2, d3 \n"
+
+ "vadd.s16 d4, d0, d3 \n" // a0 = d0 + d3
+ "vadd.s16 d5, d1, d2 \n" // a1 = d1 + d2
+ "vsub.s16 d6, d1, d2 \n" // a2 = d1 - d2
+ "vsub.s16 d7, d0, d3 \n" // a3 = d0 - d3
+
+ "vadd.s16 d0, d4, d5 \n" // a0 + a1
+ "vshl.s16 d0, d0, #3 \n" // temp[0+i*4] = (a0+a1) << 3
+ "vsub.s16 d2, d4, d5 \n" // a0 - a1
+ "vshl.s16 d2, d2, #3 \n" // (temp[2+i*4] = (a0-a1) << 3
+
+ "vmlal.s16 q9, d7, d16 \n" // a3*5352 + 1812
+ "vmlal.s16 q10, d7, d17 \n" // a3*2217 + 937
+ "vmlal.s16 q9, d6, d17 \n" // a2*2217 + a3*5352 + 1812
+ "vmlsl.s16 q10, d6, d16 \n" // a3*2217 + 937 - a2*5352
+
+ // temp[1+i*4] = (d2*2217 + d3*5352 + 1812) >> 9
+ // temp[3+i*4] = (d3*2217 + 937 - d2*5352) >> 9
+ "vshrn.s32 d1, q9, #9 \n"
+ "vshrn.s32 d3, q10, #9 \n"
+
+ // part 2
+ // transpose d0=ip[0], d1=ip[4], d2=ip[8], d3=ip[12]
+ "vtrn.32 d0, d2 \n"
+ "vtrn.32 d1, d3 \n"
+ "vtrn.16 d0, d1 \n"
+ "vtrn.16 d2, d3 \n"
+
+ "vmov.s16 d26, #7 \n"
+
+ "vadd.s16 d4, d0, d3 \n" // a1 = ip[0] + ip[12]
+ "vadd.s16 d5, d1, d2 \n" // b1 = ip[4] + ip[8]
+ "vsub.s16 d6, d1, d2 \n" // c1 = ip[4] - ip[8]
+ "vadd.s16 d4, d4, d26 \n" // a1 + 7
+ "vsub.s16 d7, d0, d3 \n" // d1 = ip[0] - ip[12]
+
+ "vadd.s16 d0, d4, d5 \n" // op[0] = a1 + b1 + 7
+ "vsub.s16 d2, d4, d5 \n" // op[8] = a1 - b1 + 7
+
+ "vmlal.s16 q11, d7, d16 \n" // d1*5352 + 12000
+ "vmlal.s16 q12, d7, d17 \n" // d1*2217 + 51000
+
+ "vceq.s16 d4, d7, #0 \n"
+
+ "vshr.s16 d0, d0, #4 \n"
+ "vshr.s16 d2, d2, #4 \n"
+
+ "vmlal.s16 q11, d6, d17 \n" // c1*2217 + d1*5352 + 12000
+ "vmlsl.s16 q12, d6, d16 \n" // d1*2217 - c1*5352 + 51000
+
+ "vmvn d4, d4 \n" // !(d1 == 0)
+ // op[4] = (c1*2217 + d1*5352 + 12000)>>16
+ "vshrn.s32 d1, q11, #16 \n"
+ // op[4] += (d1!=0)
+ "vsub.s16 d1, d1, d4 \n"
+ // op[12]= (d1*2217 - c1*5352 + 51000)>>16
+ "vshrn.s32 d3, q12, #16 \n"
+
+ // set result to out array
+ "vst1.16 {q0, q1}, [%[out]] \n"
+ : [src_ptr] "+r"(src_ptr), [ref_ptr] "+r"(ref_ptr),
+ [coeff32] "+r"(coeff32) // modified registers
+ : [kBPS] "r"(kBPS), [coeff16] "r"(coeff16),
+ [out] "r"(out) // constants
+ : "memory", "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", "q8", "q9",
+ "q10", "q11", "q12", "q13" // clobbered
+ );
+}
+
+#endif
+
+#define LOAD_LANE_16b(VALUE, LANE) do { \
+ (VALUE) = vld1_lane_s16(src, (VALUE), (LANE)); \
+ src += stride; \
+} while (0)
+
+static void FTransformWHT_NEON(const int16_t* src, int16_t* out) {
+ const int stride = 16;
+ const int16x4_t zero = vdup_n_s16(0);
+ int32x4x4_t tmp0;
+ int16x4x4_t in;
+ INIT_VECTOR4(in, zero, zero, zero, zero);
+ LOAD_LANE_16b(in.val[0], 0);
+ LOAD_LANE_16b(in.val[1], 0);
+ LOAD_LANE_16b(in.val[2], 0);
+ LOAD_LANE_16b(in.val[3], 0);
+ LOAD_LANE_16b(in.val[0], 1);
+ LOAD_LANE_16b(in.val[1], 1);
+ LOAD_LANE_16b(in.val[2], 1);
+ LOAD_LANE_16b(in.val[3], 1);
+ LOAD_LANE_16b(in.val[0], 2);
+ LOAD_LANE_16b(in.val[1], 2);
+ LOAD_LANE_16b(in.val[2], 2);
+ LOAD_LANE_16b(in.val[3], 2);
+ LOAD_LANE_16b(in.val[0], 3);
+ LOAD_LANE_16b(in.val[1], 3);
+ LOAD_LANE_16b(in.val[2], 3);
+ LOAD_LANE_16b(in.val[3], 3);
+
+ {
+ // a0 = in[0 * 16] + in[2 * 16]
+ // a1 = in[1 * 16] + in[3 * 16]
+ // a2 = in[1 * 16] - in[3 * 16]
+ // a3 = in[0 * 16] - in[2 * 16]
+ const int32x4_t a0 = vaddl_s16(in.val[0], in.val[2]);
+ const int32x4_t a1 = vaddl_s16(in.val[1], in.val[3]);
+ const int32x4_t a2 = vsubl_s16(in.val[1], in.val[3]);
+ const int32x4_t a3 = vsubl_s16(in.val[0], in.val[2]);
+ tmp0.val[0] = vaddq_s32(a0, a1);
+ tmp0.val[1] = vaddq_s32(a3, a2);
+ tmp0.val[2] = vsubq_s32(a3, a2);
+ tmp0.val[3] = vsubq_s32(a0, a1);
+ }
+ {
+ const int32x4x4_t tmp1 = Transpose4x4_NEON(tmp0);
+ // a0 = tmp[0 + i] + tmp[ 8 + i]
+ // a1 = tmp[4 + i] + tmp[12 + i]
+ // a2 = tmp[4 + i] - tmp[12 + i]
+ // a3 = tmp[0 + i] - tmp[ 8 + i]
+ const int32x4_t a0 = vaddq_s32(tmp1.val[0], tmp1.val[2]);
+ const int32x4_t a1 = vaddq_s32(tmp1.val[1], tmp1.val[3]);
+ const int32x4_t a2 = vsubq_s32(tmp1.val[1], tmp1.val[3]);
+ const int32x4_t a3 = vsubq_s32(tmp1.val[0], tmp1.val[2]);
+ const int32x4_t b0 = vhaddq_s32(a0, a1); // (a0 + a1) >> 1
+ const int32x4_t b1 = vhaddq_s32(a3, a2); // (a3 + a2) >> 1
+ const int32x4_t b2 = vhsubq_s32(a3, a2); // (a3 - a2) >> 1
+ const int32x4_t b3 = vhsubq_s32(a0, a1); // (a0 - a1) >> 1
+ const int16x4_t out0 = vmovn_s32(b0);
+ const int16x4_t out1 = vmovn_s32(b1);
+ const int16x4_t out2 = vmovn_s32(b2);
+ const int16x4_t out3 = vmovn_s32(b3);
+
+ vst1_s16(out + 0, out0);
+ vst1_s16(out + 4, out1);
+ vst1_s16(out + 8, out2);
+ vst1_s16(out + 12, out3);
+ }
+}
+#undef LOAD_LANE_16b
+
+//------------------------------------------------------------------------------
+// Texture distortion
+//
+// We try to match the spectral content (weighted) between source and
+// reconstructed samples.
+
+// a 0123, b 0123
+// a 4567, b 4567
+// a 89ab, b 89ab
+// a cdef, b cdef
+//
+// transpose
+//
+// a 048c, b 048c
+// a 159d, b 159d
+// a 26ae, b 26ae
+// a 37bf, b 37bf
+//
+static WEBP_INLINE int16x8x4_t DistoTranspose4x4S16_NEON(int16x8x4_t q4_in) {
+ const int16x8x2_t q2_tmp0 = vtrnq_s16(q4_in.val[0], q4_in.val[1]);
+ const int16x8x2_t q2_tmp1 = vtrnq_s16(q4_in.val[2], q4_in.val[3]);
+ const int32x4x2_t q2_tmp2 = vtrnq_s32(vreinterpretq_s32_s16(q2_tmp0.val[0]),
+ vreinterpretq_s32_s16(q2_tmp1.val[0]));
+ const int32x4x2_t q2_tmp3 = vtrnq_s32(vreinterpretq_s32_s16(q2_tmp0.val[1]),
+ vreinterpretq_s32_s16(q2_tmp1.val[1]));
+ q4_in.val[0] = vreinterpretq_s16_s32(q2_tmp2.val[0]);
+ q4_in.val[2] = vreinterpretq_s16_s32(q2_tmp2.val[1]);
+ q4_in.val[1] = vreinterpretq_s16_s32(q2_tmp3.val[0]);
+ q4_in.val[3] = vreinterpretq_s16_s32(q2_tmp3.val[1]);
+ return q4_in;
+}
+
+static WEBP_INLINE int16x8x4_t DistoHorizontalPass_NEON(
+ const int16x8x4_t q4_in) {
+ // {a0, a1} = {in[0] + in[2], in[1] + in[3]}
+ // {a3, a2} = {in[0] - in[2], in[1] - in[3]}
+ const int16x8_t q_a0 = vaddq_s16(q4_in.val[0], q4_in.val[2]);
+ const int16x8_t q_a1 = vaddq_s16(q4_in.val[1], q4_in.val[3]);
+ const int16x8_t q_a3 = vsubq_s16(q4_in.val[0], q4_in.val[2]);
+ const int16x8_t q_a2 = vsubq_s16(q4_in.val[1], q4_in.val[3]);
+ int16x8x4_t q4_out;
+ // tmp[0] = a0 + a1
+ // tmp[1] = a3 + a2
+ // tmp[2] = a3 - a2
+ // tmp[3] = a0 - a1
+ INIT_VECTOR4(q4_out,
+ vabsq_s16(vaddq_s16(q_a0, q_a1)),
+ vabsq_s16(vaddq_s16(q_a3, q_a2)),
+ vabdq_s16(q_a3, q_a2), vabdq_s16(q_a0, q_a1));
+ return q4_out;
+}
+
+static WEBP_INLINE int16x8x4_t DistoVerticalPass_NEON(const uint8x8x4_t q4_in) {
+ const int16x8_t q_a0 = vreinterpretq_s16_u16(vaddl_u8(q4_in.val[0],
+ q4_in.val[2]));
+ const int16x8_t q_a1 = vreinterpretq_s16_u16(vaddl_u8(q4_in.val[1],
+ q4_in.val[3]));
+ const int16x8_t q_a2 = vreinterpretq_s16_u16(vsubl_u8(q4_in.val[1],
+ q4_in.val[3]));
+ const int16x8_t q_a3 = vreinterpretq_s16_u16(vsubl_u8(q4_in.val[0],
+ q4_in.val[2]));
+ int16x8x4_t q4_out;
+
+ INIT_VECTOR4(q4_out,
+ vaddq_s16(q_a0, q_a1), vaddq_s16(q_a3, q_a2),
+ vsubq_s16(q_a3, q_a2), vsubq_s16(q_a0, q_a1));
+ return q4_out;
+}
+
+static WEBP_INLINE int16x4x4_t DistoLoadW_NEON(const uint16_t* w) {
+ const uint16x8_t q_w07 = vld1q_u16(&w[0]);
+ const uint16x8_t q_w8f = vld1q_u16(&w[8]);
+ int16x4x4_t d4_w;
+ INIT_VECTOR4(d4_w,
+ vget_low_s16(vreinterpretq_s16_u16(q_w07)),
+ vget_high_s16(vreinterpretq_s16_u16(q_w07)),
+ vget_low_s16(vreinterpretq_s16_u16(q_w8f)),
+ vget_high_s16(vreinterpretq_s16_u16(q_w8f)));
+ return d4_w;
+}
+
+static WEBP_INLINE int32x2_t DistoSum_NEON(const int16x8x4_t q4_in,
+ const int16x4x4_t d4_w) {
+ int32x2_t d_sum;
+ // sum += w[ 0] * abs(b0);
+ // sum += w[ 4] * abs(b1);
+ // sum += w[ 8] * abs(b2);
+ // sum += w[12] * abs(b3);
+ int32x4_t q_sum0 = vmull_s16(d4_w.val[0], vget_low_s16(q4_in.val[0]));
+ int32x4_t q_sum1 = vmull_s16(d4_w.val[1], vget_low_s16(q4_in.val[1]));
+ int32x4_t q_sum2 = vmull_s16(d4_w.val[2], vget_low_s16(q4_in.val[2]));
+ int32x4_t q_sum3 = vmull_s16(d4_w.val[3], vget_low_s16(q4_in.val[3]));
+ q_sum0 = vmlsl_s16(q_sum0, d4_w.val[0], vget_high_s16(q4_in.val[0]));
+ q_sum1 = vmlsl_s16(q_sum1, d4_w.val[1], vget_high_s16(q4_in.val[1]));
+ q_sum2 = vmlsl_s16(q_sum2, d4_w.val[2], vget_high_s16(q4_in.val[2]));
+ q_sum3 = vmlsl_s16(q_sum3, d4_w.val[3], vget_high_s16(q4_in.val[3]));
+
+ q_sum0 = vaddq_s32(q_sum0, q_sum1);
+ q_sum2 = vaddq_s32(q_sum2, q_sum3);
+ q_sum2 = vaddq_s32(q_sum0, q_sum2);
+ d_sum = vpadd_s32(vget_low_s32(q_sum2), vget_high_s32(q_sum2));
+ d_sum = vpadd_s32(d_sum, d_sum);
+ return d_sum;
+}
+
+#define LOAD_LANE_32b(src, VALUE, LANE) \
+ (VALUE) = vld1_lane_u32((const uint32_t*)(src), (VALUE), (LANE))
+
+// Hadamard transform
+// Returns the weighted sum of the absolute value of transformed coefficients.
+// w[] contains a row-major 4 by 4 symmetric matrix.
+static int Disto4x4_NEON(const uint8_t* const a, const uint8_t* const b,
+ const uint16_t* const w) {
+ uint32x2_t d_in_ab_0123 = vdup_n_u32(0);
+ uint32x2_t d_in_ab_4567 = vdup_n_u32(0);
+ uint32x2_t d_in_ab_89ab = vdup_n_u32(0);
+ uint32x2_t d_in_ab_cdef = vdup_n_u32(0);
+ uint8x8x4_t d4_in;
+
+ // load data a, b
+ LOAD_LANE_32b(a + 0 * BPS, d_in_ab_0123, 0);
+ LOAD_LANE_32b(a + 1 * BPS, d_in_ab_4567, 0);
+ LOAD_LANE_32b(a + 2 * BPS, d_in_ab_89ab, 0);
+ LOAD_LANE_32b(a + 3 * BPS, d_in_ab_cdef, 0);
+ LOAD_LANE_32b(b + 0 * BPS, d_in_ab_0123, 1);
+ LOAD_LANE_32b(b + 1 * BPS, d_in_ab_4567, 1);
+ LOAD_LANE_32b(b + 2 * BPS, d_in_ab_89ab, 1);
+ LOAD_LANE_32b(b + 3 * BPS, d_in_ab_cdef, 1);
+ INIT_VECTOR4(d4_in,
+ vreinterpret_u8_u32(d_in_ab_0123),
+ vreinterpret_u8_u32(d_in_ab_4567),
+ vreinterpret_u8_u32(d_in_ab_89ab),
+ vreinterpret_u8_u32(d_in_ab_cdef));
+
+ {
+ // Vertical pass first to avoid a transpose (vertical and horizontal passes
+ // are commutative because w/kWeightY is symmetric) and subsequent
+ // transpose.
+ const int16x8x4_t q4_v = DistoVerticalPass_NEON(d4_in);
+ const int16x4x4_t d4_w = DistoLoadW_NEON(w);
+ // horizontal pass
+ const int16x8x4_t q4_t = DistoTranspose4x4S16_NEON(q4_v);
+ const int16x8x4_t q4_h = DistoHorizontalPass_NEON(q4_t);
+ int32x2_t d_sum = DistoSum_NEON(q4_h, d4_w);
+
+ // abs(sum2 - sum1) >> 5
+ d_sum = vabs_s32(d_sum);
+ d_sum = vshr_n_s32(d_sum, 5);
+ return vget_lane_s32(d_sum, 0);
+ }
+}
+#undef LOAD_LANE_32b
+
+static int Disto16x16_NEON(const uint8_t* const a, const uint8_t* const b,
+ const uint16_t* const w) {
+ int D = 0;
+ int x, y;
+ for (y = 0; y < 16 * BPS; y += 4 * BPS) {
+ for (x = 0; x < 16; x += 4) {
+ D += Disto4x4_NEON(a + x + y, b + x + y, w);
+ }
+ }
+ return D;
+}
+
+//------------------------------------------------------------------------------
+
+static void CollectHistogram_NEON(const uint8_t* ref, const uint8_t* pred,
+ int start_block, int end_block,
+ VP8Histogram* const histo) {
+ const uint16x8_t max_coeff_thresh = vdupq_n_u16(MAX_COEFF_THRESH);
+ int j;
+ int distribution[MAX_COEFF_THRESH + 1] = { 0 };
+ for (j = start_block; j < end_block; ++j) {
+ int16_t out[16];
+ FTransform_NEON(ref + VP8DspScan[j], pred + VP8DspScan[j], out);
+ {
+ int k;
+ const int16x8_t a0 = vld1q_s16(out + 0);
+ const int16x8_t b0 = vld1q_s16(out + 8);
+ const uint16x8_t a1 = vreinterpretq_u16_s16(vabsq_s16(a0));
+ const uint16x8_t b1 = vreinterpretq_u16_s16(vabsq_s16(b0));
+ const uint16x8_t a2 = vshrq_n_u16(a1, 3);
+ const uint16x8_t b2 = vshrq_n_u16(b1, 3);
+ const uint16x8_t a3 = vminq_u16(a2, max_coeff_thresh);
+ const uint16x8_t b3 = vminq_u16(b2, max_coeff_thresh);
+ vst1q_s16(out + 0, vreinterpretq_s16_u16(a3));
+ vst1q_s16(out + 8, vreinterpretq_s16_u16(b3));
+ // Convert coefficients to bin.
+ for (k = 0; k < 16; ++k) {
+ ++distribution[out[k]];
+ }
+ }
+ }
+ VP8SetHistogramData(distribution, histo);
+}
+
+//------------------------------------------------------------------------------
+
+static WEBP_INLINE void AccumulateSSE16_NEON(const uint8_t* const a,
+ const uint8_t* const b,
+ uint32x4_t* const sum) {
+ const uint8x16_t a0 = vld1q_u8(a);
+ const uint8x16_t b0 = vld1q_u8(b);
+ const uint8x16_t abs_diff = vabdq_u8(a0, b0);
+ const uint16x8_t prod1 = vmull_u8(vget_low_u8(abs_diff),
+ vget_low_u8(abs_diff));
+ const uint16x8_t prod2 = vmull_u8(vget_high_u8(abs_diff),
+ vget_high_u8(abs_diff));
+ /* pair-wise adds and widen */
+ const uint32x4_t sum1 = vpaddlq_u16(prod1);
+ const uint32x4_t sum2 = vpaddlq_u16(prod2);
+ *sum = vaddq_u32(*sum, vaddq_u32(sum1, sum2));
+}
+
+// Horizontal sum of all four uint32_t values in 'sum'.
+static int SumToInt_NEON(uint32x4_t sum) {
+ const uint64x2_t sum2 = vpaddlq_u32(sum);
+ const uint64_t sum3 = vgetq_lane_u64(sum2, 0) + vgetq_lane_u64(sum2, 1);
+ return (int)sum3;
+}
+
+static int SSE16x16_NEON(const uint8_t* a, const uint8_t* b) {
+ uint32x4_t sum = vdupq_n_u32(0);
+ int y;
+ for (y = 0; y < 16; ++y) {
+ AccumulateSSE16_NEON(a + y * BPS, b + y * BPS, &sum);
+ }
+ return SumToInt_NEON(sum);
+}
+
+static int SSE16x8_NEON(const uint8_t* a, const uint8_t* b) {
+ uint32x4_t sum = vdupq_n_u32(0);
+ int y;
+ for (y = 0; y < 8; ++y) {
+ AccumulateSSE16_NEON(a + y * BPS, b + y * BPS, &sum);
+ }
+ return SumToInt_NEON(sum);
+}
+
+static int SSE8x8_NEON(const uint8_t* a, const uint8_t* b) {
+ uint32x4_t sum = vdupq_n_u32(0);
+ int y;
+ for (y = 0; y < 8; ++y) {
+ const uint8x8_t a0 = vld1_u8(a + y * BPS);
+ const uint8x8_t b0 = vld1_u8(b + y * BPS);
+ const uint8x8_t abs_diff = vabd_u8(a0, b0);
+ const uint16x8_t prod = vmull_u8(abs_diff, abs_diff);
+ sum = vpadalq_u16(sum, prod);
+ }
+ return SumToInt_NEON(sum);
+}
+
+static int SSE4x4_NEON(const uint8_t* a, const uint8_t* b) {
+ const uint8x16_t a0 = Load4x4_NEON(a);
+ const uint8x16_t b0 = Load4x4_NEON(b);
+ const uint8x16_t abs_diff = vabdq_u8(a0, b0);
+ const uint16x8_t prod1 = vmull_u8(vget_low_u8(abs_diff),
+ vget_low_u8(abs_diff));
+ const uint16x8_t prod2 = vmull_u8(vget_high_u8(abs_diff),
+ vget_high_u8(abs_diff));
+ /* pair-wise adds and widen */
+ const uint32x4_t sum1 = vpaddlq_u16(prod1);
+ const uint32x4_t sum2 = vpaddlq_u16(prod2);
+ return SumToInt_NEON(vaddq_u32(sum1, sum2));
+}
+
+//------------------------------------------------------------------------------
+
+// Compilation with gcc-4.6.x is problematic for now.
+#if !defined(WORK_AROUND_GCC)
+
+static int16x8_t Quantize_NEON(int16_t* const in,
+ const VP8Matrix* const mtx, int offset) {
+ const uint16x8_t sharp = vld1q_u16(&mtx->sharpen_[offset]);
+ const uint16x8_t q = vld1q_u16(&mtx->q_[offset]);
+ const uint16x8_t iq = vld1q_u16(&mtx->iq_[offset]);
+ const uint32x4_t bias0 = vld1q_u32(&mtx->bias_[offset + 0]);
+ const uint32x4_t bias1 = vld1q_u32(&mtx->bias_[offset + 4]);
+
+ const int16x8_t a = vld1q_s16(in + offset); // in
+ const uint16x8_t b = vreinterpretq_u16_s16(vabsq_s16(a)); // coeff = abs(in)
+ const int16x8_t sign = vshrq_n_s16(a, 15); // sign
+ const uint16x8_t c = vaddq_u16(b, sharp); // + sharpen
+ const uint32x4_t m0 = vmull_u16(vget_low_u16(c), vget_low_u16(iq));
+ const uint32x4_t m1 = vmull_u16(vget_high_u16(c), vget_high_u16(iq));
+ const uint32x4_t m2 = vhaddq_u32(m0, bias0);
+ const uint32x4_t m3 = vhaddq_u32(m1, bias1); // (coeff * iQ + bias) >> 1
+ const uint16x8_t c0 = vcombine_u16(vshrn_n_u32(m2, 16),
+ vshrn_n_u32(m3, 16)); // QFIX=17 = 16+1
+ const uint16x8_t c1 = vminq_u16(c0, vdupq_n_u16(MAX_LEVEL));
+ const int16x8_t c2 = veorq_s16(vreinterpretq_s16_u16(c1), sign);
+ const int16x8_t c3 = vsubq_s16(c2, sign); // restore sign
+ const int16x8_t c4 = vmulq_s16(c3, vreinterpretq_s16_u16(q));
+ vst1q_s16(in + offset, c4);
+ assert(QFIX == 17); // this function can't work as is if QFIX != 16+1
+ return c3;
+}
+
+static const uint8_t kShuffles[4][8] = {
+ { 0, 1, 2, 3, 8, 9, 16, 17 },
+ { 10, 11, 4, 5, 6, 7, 12, 13 },
+ { 18, 19, 24, 25, 26, 27, 20, 21 },
+ { 14, 15, 22, 23, 28, 29, 30, 31 }
+};
+
+static int QuantizeBlock_NEON(int16_t in[16], int16_t out[16],
+ const VP8Matrix* const mtx) {
+ const int16x8_t out0 = Quantize_NEON(in, mtx, 0);
+ const int16x8_t out1 = Quantize_NEON(in, mtx, 8);
+ uint8x8x4_t shuffles;
+ // vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use
+ // non-standard versions there.
+#if defined(__APPLE__) && defined(__aarch64__) && \
+ defined(__apple_build_version__) && (__apple_build_version__< 6020037)
+ uint8x16x2_t all_out;
+ INIT_VECTOR2(all_out, vreinterpretq_u8_s16(out0), vreinterpretq_u8_s16(out1));
+ INIT_VECTOR4(shuffles,
+ vtbl2q_u8(all_out, vld1_u8(kShuffles[0])),
+ vtbl2q_u8(all_out, vld1_u8(kShuffles[1])),
+ vtbl2q_u8(all_out, vld1_u8(kShuffles[2])),
+ vtbl2q_u8(all_out, vld1_u8(kShuffles[3])));
+#else
+ uint8x8x4_t all_out;
+ INIT_VECTOR4(all_out,
+ vreinterpret_u8_s16(vget_low_s16(out0)),
+ vreinterpret_u8_s16(vget_high_s16(out0)),
+ vreinterpret_u8_s16(vget_low_s16(out1)),
+ vreinterpret_u8_s16(vget_high_s16(out1)));
+ INIT_VECTOR4(shuffles,
+ vtbl4_u8(all_out, vld1_u8(kShuffles[0])),
+ vtbl4_u8(all_out, vld1_u8(kShuffles[1])),
+ vtbl4_u8(all_out, vld1_u8(kShuffles[2])),
+ vtbl4_u8(all_out, vld1_u8(kShuffles[3])));
+#endif
+ // Zigzag reordering
+ vst1_u8((uint8_t*)(out + 0), shuffles.val[0]);
+ vst1_u8((uint8_t*)(out + 4), shuffles.val[1]);
+ vst1_u8((uint8_t*)(out + 8), shuffles.val[2]);
+ vst1_u8((uint8_t*)(out + 12), shuffles.val[3]);
+ // test zeros
+ if (*(uint64_t*)(out + 0) != 0) return 1;
+ if (*(uint64_t*)(out + 4) != 0) return 1;
+ if (*(uint64_t*)(out + 8) != 0) return 1;
+ if (*(uint64_t*)(out + 12) != 0) return 1;
+ return 0;
+}
+
+static int Quantize2Blocks_NEON(int16_t in[32], int16_t out[32],
+ const VP8Matrix* const mtx) {
+ int nz;
+ nz = QuantizeBlock_NEON(in + 0 * 16, out + 0 * 16, mtx) << 0;
+ nz |= QuantizeBlock_NEON(in + 1 * 16, out + 1 * 16, mtx) << 1;
+ return nz;
+}
+
+#endif // !WORK_AROUND_GCC
+
+//------------------------------------------------------------------------------
+// Entry point
+
+extern void VP8EncDspInitNEON(void);
+
+WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitNEON(void) {
+ VP8ITransform = ITransform_NEON;
+ VP8FTransform = FTransform_NEON;
+
+ VP8FTransformWHT = FTransformWHT_NEON;
+
+ VP8TDisto4x4 = Disto4x4_NEON;
+ VP8TDisto16x16 = Disto16x16_NEON;
+ VP8CollectHistogram = CollectHistogram_NEON;
+
+ VP8SSE16x16 = SSE16x16_NEON;
+ VP8SSE16x8 = SSE16x8_NEON;
+ VP8SSE8x8 = SSE8x8_NEON;
+ VP8SSE4x4 = SSE4x4_NEON;
+
+#if !defined(WORK_AROUND_GCC)
+ VP8EncQuantizeBlock = QuantizeBlock_NEON;
+ VP8EncQuantize2Blocks = Quantize2Blocks_NEON;
+#endif
+}
+
+#else // !WEBP_USE_NEON
+
+WEBP_DSP_INIT_STUB(VP8EncDspInitNEON)
+
+#endif // WEBP_USE_NEON