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libwebp/src/dsp/lossless_sse2.c
Pascal Massimino 8ea81561d2 change VP8LPredictorFunc signature to avoid reading 'left' 
... when it's not available. Even if the value was discarded and
never used, some msan config were complaining about reading it
and passing it around.

Change-Id: Iab8d24676c5bb58e607a829121e36c2862da397c
2021-11-05 16:22:31 +01:00

717 lines
30 KiB
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// Copyright 2014 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.
// -----------------------------------------------------------------------------
//
// SSE2 variant of methods for lossless decoder
//
// Author: Skal (pascal.massimino@gmail.com)
#include "src/dsp/dsp.h"
#if defined(WEBP_USE_SSE2)
#include "src/dsp/common_sse2.h"
#include "src/dsp/lossless.h"
#include "src/dsp/lossless_common.h"
#include <emmintrin.h>
//------------------------------------------------------------------------------
// Predictor Transform
static WEBP_INLINE uint32_t ClampedAddSubtractFull_SSE2(uint32_t c0,
uint32_t c1,
uint32_t c2) {
const __m128i zero = _mm_setzero_si128();
const __m128i C0 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c0), zero);
const __m128i C1 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c1), zero);
const __m128i C2 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c2), zero);
const __m128i V1 = _mm_add_epi16(C0, C1);
const __m128i V2 = _mm_sub_epi16(V1, C2);
const __m128i b = _mm_packus_epi16(V2, V2);
const uint32_t output = _mm_cvtsi128_si32(b);
return output;
}
static WEBP_INLINE uint32_t ClampedAddSubtractHalf_SSE2(uint32_t c0,
uint32_t c1,
uint32_t c2) {
const __m128i zero = _mm_setzero_si128();
const __m128i C0 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c0), zero);
const __m128i C1 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c1), zero);
const __m128i B0 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c2), zero);
const __m128i avg = _mm_add_epi16(C1, C0);
const __m128i A0 = _mm_srli_epi16(avg, 1);
const __m128i A1 = _mm_sub_epi16(A0, B0);
const __m128i BgtA = _mm_cmpgt_epi16(B0, A0);
const __m128i A2 = _mm_sub_epi16(A1, BgtA);
const __m128i A3 = _mm_srai_epi16(A2, 1);
const __m128i A4 = _mm_add_epi16(A0, A3);
const __m128i A5 = _mm_packus_epi16(A4, A4);
const uint32_t output = _mm_cvtsi128_si32(A5);
return output;
}
static WEBP_INLINE uint32_t Select_SSE2(uint32_t a, uint32_t b, uint32_t c) {
int pa_minus_pb;
const __m128i zero = _mm_setzero_si128();
const __m128i A0 = _mm_cvtsi32_si128(a);
const __m128i B0 = _mm_cvtsi32_si128(b);
const __m128i C0 = _mm_cvtsi32_si128(c);
const __m128i AC0 = _mm_subs_epu8(A0, C0);
const __m128i CA0 = _mm_subs_epu8(C0, A0);
const __m128i BC0 = _mm_subs_epu8(B0, C0);
const __m128i CB0 = _mm_subs_epu8(C0, B0);
const __m128i AC = _mm_or_si128(AC0, CA0);
const __m128i BC = _mm_or_si128(BC0, CB0);
const __m128i pa = _mm_unpacklo_epi8(AC, zero); // |a - c|
const __m128i pb = _mm_unpacklo_epi8(BC, zero); // |b - c|
const __m128i diff = _mm_sub_epi16(pb, pa);
{
int16_t out[8];
_mm_storeu_si128((__m128i*)out, diff);
pa_minus_pb = out[0] + out[1] + out[2] + out[3];
}
return (pa_minus_pb <= 0) ? a : b;
}
static WEBP_INLINE void Average2_m128i(const __m128i* const a0,
const __m128i* const a1,
__m128i* const avg) {
// (a + b) >> 1 = ((a + b + 1) >> 1) - ((a ^ b) & 1)
const __m128i ones = _mm_set1_epi8(1);
const __m128i avg1 = _mm_avg_epu8(*a0, *a1);
const __m128i one = _mm_and_si128(_mm_xor_si128(*a0, *a1), ones);
*avg = _mm_sub_epi8(avg1, one);
}
static WEBP_INLINE void Average2_uint32_SSE2(const uint32_t a0,
const uint32_t a1,
__m128i* const avg) {
// (a + b) >> 1 = ((a + b + 1) >> 1) - ((a ^ b) & 1)
const __m128i ones = _mm_set1_epi8(1);
const __m128i A0 = _mm_cvtsi32_si128(a0);
const __m128i A1 = _mm_cvtsi32_si128(a1);
const __m128i avg1 = _mm_avg_epu8(A0, A1);
const __m128i one = _mm_and_si128(_mm_xor_si128(A0, A1), ones);
*avg = _mm_sub_epi8(avg1, one);
}
static WEBP_INLINE __m128i Average2_uint32_16_SSE2(uint32_t a0, uint32_t a1) {
const __m128i zero = _mm_setzero_si128();
const __m128i A0 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(a0), zero);
const __m128i A1 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(a1), zero);
const __m128i sum = _mm_add_epi16(A1, A0);
return _mm_srli_epi16(sum, 1);
}
static WEBP_INLINE uint32_t Average2_SSE2(uint32_t a0, uint32_t a1) {
__m128i output;
Average2_uint32_SSE2(a0, a1, &output);
return _mm_cvtsi128_si32(output);
}
static WEBP_INLINE uint32_t Average3_SSE2(uint32_t a0, uint32_t a1,
uint32_t a2) {
const __m128i zero = _mm_setzero_si128();
const __m128i avg1 = Average2_uint32_16_SSE2(a0, a2);
const __m128i A1 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(a1), zero);
const __m128i sum = _mm_add_epi16(avg1, A1);
const __m128i avg2 = _mm_srli_epi16(sum, 1);
const __m128i A2 = _mm_packus_epi16(avg2, avg2);
const uint32_t output = _mm_cvtsi128_si32(A2);
return output;
}
static WEBP_INLINE uint32_t Average4_SSE2(uint32_t a0, uint32_t a1,
uint32_t a2, uint32_t a3) {
const __m128i avg1 = Average2_uint32_16_SSE2(a0, a1);
const __m128i avg2 = Average2_uint32_16_SSE2(a2, a3);
const __m128i sum = _mm_add_epi16(avg2, avg1);
const __m128i avg3 = _mm_srli_epi16(sum, 1);
const __m128i A0 = _mm_packus_epi16(avg3, avg3);
const uint32_t output = _mm_cvtsi128_si32(A0);
return output;
}
static uint32_t Predictor5_SSE2(const uint32_t* const left,
const uint32_t* const top) {
const uint32_t pred = Average3_SSE2(*left, top[0], top[1]);
return pred;
}
static uint32_t Predictor6_SSE2(const uint32_t* const left,
const uint32_t* const top) {
const uint32_t pred = Average2_SSE2(*left, top[-1]);
return pred;
}
static uint32_t Predictor7_SSE2(const uint32_t* const left,
const uint32_t* const top) {
const uint32_t pred = Average2_SSE2(*left, top[0]);
return pred;
}
static uint32_t Predictor8_SSE2(const uint32_t* const left,
const uint32_t* const top) {
const uint32_t pred = Average2_SSE2(top[-1], top[0]);
(void)left;
return pred;
}
static uint32_t Predictor9_SSE2(const uint32_t* const left,
const uint32_t* const top) {
const uint32_t pred = Average2_SSE2(top[0], top[1]);
(void)left;
return pred;
}
static uint32_t Predictor10_SSE2(const uint32_t* const left,
const uint32_t* const top) {
const uint32_t pred = Average4_SSE2(*left, top[-1], top[0], top[1]);
return pred;
}
static uint32_t Predictor11_SSE2(const uint32_t* const left,
const uint32_t* const top) {
const uint32_t pred = Select_SSE2(top[0], *left, top[-1]);
return pred;
}
static uint32_t Predictor12_SSE2(const uint32_t* const left,
const uint32_t* const top) {
const uint32_t pred = ClampedAddSubtractFull_SSE2(*left, top[0], top[-1]);
return pred;
}
static uint32_t Predictor13_SSE2(const uint32_t* const left,
const uint32_t* const top) {
const uint32_t pred = ClampedAddSubtractHalf_SSE2(*left, top[0], top[-1]);
return pred;
}
// Batch versions of those functions.
// Predictor0: ARGB_BLACK.
static void PredictorAdd0_SSE2(const uint32_t* in, const uint32_t* upper,
int num_pixels, uint32_t* out) {
int i;
const __m128i black = _mm_set1_epi32(ARGB_BLACK);
for (i = 0; i + 4 <= num_pixels; i += 4) {
const __m128i src = _mm_loadu_si128((const __m128i*)&in[i]);
const __m128i res = _mm_add_epi8(src, black);
_mm_storeu_si128((__m128i*)&out[i], res);
}
if (i != num_pixels) {
VP8LPredictorsAdd_C[0](in + i, NULL, num_pixels - i, out + i);
}
(void)upper;
}
// Predictor1: left.
static void PredictorAdd1_SSE2(const uint32_t* in, const uint32_t* upper,
int num_pixels, uint32_t* out) {
int i;
__m128i prev = _mm_set1_epi32(out[-1]);
for (i = 0; i + 4 <= num_pixels; i += 4) {
// a | b | c | d
const __m128i src = _mm_loadu_si128((const __m128i*)&in[i]);
// 0 | a | b | c
const __m128i shift0 = _mm_slli_si128(src, 4);
// a | a + b | b + c | c + d
const __m128i sum0 = _mm_add_epi8(src, shift0);
// 0 | 0 | a | a + b
const __m128i shift1 = _mm_slli_si128(sum0, 8);
// a | a + b | a + b + c | a + b + c + d
const __m128i sum1 = _mm_add_epi8(sum0, shift1);
const __m128i res = _mm_add_epi8(sum1, prev);
_mm_storeu_si128((__m128i*)&out[i], res);
// replicate prev output on the four lanes
prev = _mm_shuffle_epi32(res, (3 << 0) | (3 << 2) | (3 << 4) | (3 << 6));
}
if (i != num_pixels) {
VP8LPredictorsAdd_C[1](in + i, upper + i, num_pixels - i, out + i);
}
}
// Macro that adds 32-bit integers from IN using mod 256 arithmetic
// per 8 bit channel.
#define GENERATE_PREDICTOR_1(X, IN) \
static void PredictorAdd##X##_SSE2(const uint32_t* in, const uint32_t* upper, \
int num_pixels, uint32_t* out) { \
int i; \
for (i = 0; i + 4 <= num_pixels; i += 4) { \
const __m128i src = _mm_loadu_si128((const __m128i*)&in[i]); \
const __m128i other = _mm_loadu_si128((const __m128i*)&(IN)); \
const __m128i res = _mm_add_epi8(src, other); \
_mm_storeu_si128((__m128i*)&out[i], res); \
} \
if (i != num_pixels) { \
VP8LPredictorsAdd_C[(X)](in + i, upper + i, num_pixels - i, out + i); \
} \
}
// Predictor2: Top.
GENERATE_PREDICTOR_1(2, upper[i])
// Predictor3: Top-right.
GENERATE_PREDICTOR_1(3, upper[i + 1])
// Predictor4: Top-left.
GENERATE_PREDICTOR_1(4, upper[i - 1])
#undef GENERATE_PREDICTOR_1
// Due to averages with integers, values cannot be accumulated in parallel for
// predictors 5 to 7.
GENERATE_PREDICTOR_ADD(Predictor5_SSE2, PredictorAdd5_SSE2)
GENERATE_PREDICTOR_ADD(Predictor6_SSE2, PredictorAdd6_SSE2)
GENERATE_PREDICTOR_ADD(Predictor7_SSE2, PredictorAdd7_SSE2)
#define GENERATE_PREDICTOR_2(X, IN) \
static void PredictorAdd##X##_SSE2(const uint32_t* in, const uint32_t* upper, \
int num_pixels, uint32_t* out) { \
int i; \
for (i = 0; i + 4 <= num_pixels; i += 4) { \
const __m128i Tother = _mm_loadu_si128((const __m128i*)&(IN)); \
const __m128i T = _mm_loadu_si128((const __m128i*)&upper[i]); \
const __m128i src = _mm_loadu_si128((const __m128i*)&in[i]); \
__m128i avg, res; \
Average2_m128i(&T, &Tother, &avg); \
res = _mm_add_epi8(avg, src); \
_mm_storeu_si128((__m128i*)&out[i], res); \
} \
if (i != num_pixels) { \
VP8LPredictorsAdd_C[(X)](in + i, upper + i, num_pixels - i, out + i); \
} \
}
// Predictor8: average TL T.
GENERATE_PREDICTOR_2(8, upper[i - 1])
// Predictor9: average T TR.
GENERATE_PREDICTOR_2(9, upper[i + 1])
#undef GENERATE_PREDICTOR_2
// Predictor10: average of (average of (L,TL), average of (T, TR)).
#define DO_PRED10(OUT) do { \
__m128i avgLTL, avg; \
Average2_m128i(&L, &TL, &avgLTL); \
Average2_m128i(&avgTTR, &avgLTL, &avg); \
L = _mm_add_epi8(avg, src); \
out[i + (OUT)] = _mm_cvtsi128_si32(L); \
} while (0)
#define DO_PRED10_SHIFT do { \
/* Rotate the pre-computed values for the next iteration.*/ \
avgTTR = _mm_srli_si128(avgTTR, 4); \
TL = _mm_srli_si128(TL, 4); \
src = _mm_srli_si128(src, 4); \
} while (0)
static void PredictorAdd10_SSE2(const uint32_t* in, const uint32_t* upper,
int num_pixels, uint32_t* out) {
int i;
__m128i L = _mm_cvtsi32_si128(out[-1]);
for (i = 0; i + 4 <= num_pixels; i += 4) {
__m128i src = _mm_loadu_si128((const __m128i*)&in[i]);
__m128i TL = _mm_loadu_si128((const __m128i*)&upper[i - 1]);
const __m128i T = _mm_loadu_si128((const __m128i*)&upper[i]);
const __m128i TR = _mm_loadu_si128((const __m128i*)&upper[i + 1]);
__m128i avgTTR;
Average2_m128i(&T, &TR, &avgTTR);
DO_PRED10(0);
DO_PRED10_SHIFT;
DO_PRED10(1);
DO_PRED10_SHIFT;
DO_PRED10(2);
DO_PRED10_SHIFT;
DO_PRED10(3);
}
if (i != num_pixels) {
VP8LPredictorsAdd_C[10](in + i, upper + i, num_pixels - i, out + i);
}
}
#undef DO_PRED10
#undef DO_PRED10_SHIFT
// Predictor11: select.
#define DO_PRED11(OUT) do { \
const __m128i L_lo = _mm_unpacklo_epi32(L, T); \
const __m128i TL_lo = _mm_unpacklo_epi32(TL, T); \
const __m128i pb = _mm_sad_epu8(L_lo, TL_lo); /* pb = sum |L-TL|*/ \
const __m128i mask = _mm_cmpgt_epi32(pb, pa); \
const __m128i A = _mm_and_si128(mask, L); \
const __m128i B = _mm_andnot_si128(mask, T); \
const __m128i pred = _mm_or_si128(A, B); /* pred = (pa > b)? L : T*/ \
L = _mm_add_epi8(src, pred); \
out[i + (OUT)] = _mm_cvtsi128_si32(L); \
} while (0)
#define DO_PRED11_SHIFT do { \
/* Shift the pre-computed value for the next iteration.*/ \
T = _mm_srli_si128(T, 4); \
TL = _mm_srli_si128(TL, 4); \
src = _mm_srli_si128(src, 4); \
pa = _mm_srli_si128(pa, 4); \
} while (0)
static void PredictorAdd11_SSE2(const uint32_t* in, const uint32_t* upper,
int num_pixels, uint32_t* out) {
int i;
__m128i pa;
__m128i L = _mm_cvtsi32_si128(out[-1]);
for (i = 0; i + 4 <= num_pixels; i += 4) {
__m128i T = _mm_loadu_si128((const __m128i*)&upper[i]);
__m128i TL = _mm_loadu_si128((const __m128i*)&upper[i - 1]);
__m128i src = _mm_loadu_si128((const __m128i*)&in[i]);
{
// We can unpack with any value on the upper 32 bits, provided it's the
// same on both operands (so that their sum of abs diff is zero). Here we
// use T.
const __m128i T_lo = _mm_unpacklo_epi32(T, T);
const __m128i TL_lo = _mm_unpacklo_epi32(TL, T);
const __m128i T_hi = _mm_unpackhi_epi32(T, T);
const __m128i TL_hi = _mm_unpackhi_epi32(TL, T);
const __m128i s_lo = _mm_sad_epu8(T_lo, TL_lo);
const __m128i s_hi = _mm_sad_epu8(T_hi, TL_hi);
pa = _mm_packs_epi32(s_lo, s_hi); // pa = sum |T-TL|
}
DO_PRED11(0);
DO_PRED11_SHIFT;
DO_PRED11(1);
DO_PRED11_SHIFT;
DO_PRED11(2);
DO_PRED11_SHIFT;
DO_PRED11(3);
}
if (i != num_pixels) {
VP8LPredictorsAdd_C[11](in + i, upper + i, num_pixels - i, out + i);
}
}
#undef DO_PRED11
#undef DO_PRED11_SHIFT
// Predictor12: ClampedAddSubtractFull.
#define DO_PRED12(DIFF, LANE, OUT) do { \
const __m128i all = _mm_add_epi16(L, (DIFF)); \
const __m128i alls = _mm_packus_epi16(all, all); \
const __m128i res = _mm_add_epi8(src, alls); \
out[i + (OUT)] = _mm_cvtsi128_si32(res); \
L = _mm_unpacklo_epi8(res, zero); \
} while (0)
#define DO_PRED12_SHIFT(DIFF, LANE) do { \
/* Shift the pre-computed value for the next iteration.*/ \
if ((LANE) == 0) (DIFF) = _mm_srli_si128((DIFF), 8); \
src = _mm_srli_si128(src, 4); \
} while (0)
static void PredictorAdd12_SSE2(const uint32_t* in, const uint32_t* upper,
int num_pixels, uint32_t* out) {
int i;
const __m128i zero = _mm_setzero_si128();
const __m128i L8 = _mm_cvtsi32_si128(out[-1]);
__m128i L = _mm_unpacklo_epi8(L8, zero);
for (i = 0; i + 4 <= num_pixels; i += 4) {
// Load 4 pixels at a time.
__m128i src = _mm_loadu_si128((const __m128i*)&in[i]);
const __m128i T = _mm_loadu_si128((const __m128i*)&upper[i]);
const __m128i T_lo = _mm_unpacklo_epi8(T, zero);
const __m128i T_hi = _mm_unpackhi_epi8(T, zero);
const __m128i TL = _mm_loadu_si128((const __m128i*)&upper[i - 1]);
const __m128i TL_lo = _mm_unpacklo_epi8(TL, zero);
const __m128i TL_hi = _mm_unpackhi_epi8(TL, zero);
__m128i diff_lo = _mm_sub_epi16(T_lo, TL_lo);
__m128i diff_hi = _mm_sub_epi16(T_hi, TL_hi);
DO_PRED12(diff_lo, 0, 0);
DO_PRED12_SHIFT(diff_lo, 0);
DO_PRED12(diff_lo, 1, 1);
DO_PRED12_SHIFT(diff_lo, 1);
DO_PRED12(diff_hi, 0, 2);
DO_PRED12_SHIFT(diff_hi, 0);
DO_PRED12(diff_hi, 1, 3);
}
if (i != num_pixels) {
VP8LPredictorsAdd_C[12](in + i, upper + i, num_pixels - i, out + i);
}
}
#undef DO_PRED12
#undef DO_PRED12_SHIFT
// Due to averages with integers, values cannot be accumulated in parallel for
// predictors 13.
GENERATE_PREDICTOR_ADD(Predictor13_SSE2, PredictorAdd13_SSE2)
//------------------------------------------------------------------------------
// Subtract-Green Transform
static void AddGreenToBlueAndRed_SSE2(const uint32_t* const src, int num_pixels,
uint32_t* dst) {
int i;
for (i = 0; i + 4 <= num_pixels; i += 4) {
const __m128i in = _mm_loadu_si128((const __m128i*)&src[i]); // argb
const __m128i A = _mm_srli_epi16(in, 8); // 0 a 0 g
const __m128i B = _mm_shufflelo_epi16(A, _MM_SHUFFLE(2, 2, 0, 0));
const __m128i C = _mm_shufflehi_epi16(B, _MM_SHUFFLE(2, 2, 0, 0)); // 0g0g
const __m128i out = _mm_add_epi8(in, C);
_mm_storeu_si128((__m128i*)&dst[i], out);
}
// fallthrough and finish off with plain-C
if (i != num_pixels) {
VP8LAddGreenToBlueAndRed_C(src + i, num_pixels - i, dst + i);
}
}
//------------------------------------------------------------------------------
// Color Transform
static void TransformColorInverse_SSE2(const VP8LMultipliers* const m,
const uint32_t* const src,
int num_pixels, uint32_t* dst) {
// sign-extended multiplying constants, pre-shifted by 5.
#define CST(X) (((int16_t)(m->X << 8)) >> 5) // sign-extend
#define MK_CST_16(HI, LO) \
_mm_set1_epi32((int)(((uint32_t)(HI) << 16) | ((LO) & 0xffff)))
const __m128i mults_rb = MK_CST_16(CST(green_to_red_), CST(green_to_blue_));
const __m128i mults_b2 = MK_CST_16(CST(red_to_blue_), 0);
#undef MK_CST_16
#undef CST
const __m128i mask_ag = _mm_set1_epi32(0xff00ff00); // alpha-green masks
int i;
for (i = 0; i + 4 <= num_pixels; i += 4) {
const __m128i in = _mm_loadu_si128((const __m128i*)&src[i]); // argb
const __m128i A = _mm_and_si128(in, mask_ag); // a 0 g 0
const __m128i B = _mm_shufflelo_epi16(A, _MM_SHUFFLE(2, 2, 0, 0));
const __m128i C = _mm_shufflehi_epi16(B, _MM_SHUFFLE(2, 2, 0, 0)); // g0g0
const __m128i D = _mm_mulhi_epi16(C, mults_rb); // x dr x db1
const __m128i E = _mm_add_epi8(in, D); // x r' x b'
const __m128i F = _mm_slli_epi16(E, 8); // r' 0 b' 0
const __m128i G = _mm_mulhi_epi16(F, mults_b2); // x db2 0 0
const __m128i H = _mm_srli_epi32(G, 8); // 0 x db2 0
const __m128i I = _mm_add_epi8(H, F); // r' x b'' 0
const __m128i J = _mm_srli_epi16(I, 8); // 0 r' 0 b''
const __m128i out = _mm_or_si128(J, A);
_mm_storeu_si128((__m128i*)&dst[i], out);
}
// Fall-back to C-version for left-overs.
if (i != num_pixels) {
VP8LTransformColorInverse_C(m, src + i, num_pixels - i, dst + i);
}
}
//------------------------------------------------------------------------------
// Color-space conversion functions
static void ConvertBGRAToRGB_SSE2(const uint32_t* src, int num_pixels,
uint8_t* dst) {
const __m128i* in = (const __m128i*)src;
__m128i* out = (__m128i*)dst;
while (num_pixels >= 32) {
// Load the BGRA buffers.
__m128i in0 = _mm_loadu_si128(in + 0);
__m128i in1 = _mm_loadu_si128(in + 1);
__m128i in2 = _mm_loadu_si128(in + 2);
__m128i in3 = _mm_loadu_si128(in + 3);
__m128i in4 = _mm_loadu_si128(in + 4);
__m128i in5 = _mm_loadu_si128(in + 5);
__m128i in6 = _mm_loadu_si128(in + 6);
__m128i in7 = _mm_loadu_si128(in + 7);
VP8L32bToPlanar_SSE2(&in0, &in1, &in2, &in3);
VP8L32bToPlanar_SSE2(&in4, &in5, &in6, &in7);
// At this points, in1/in5 contains red only, in2/in6 green only ...
// Pack the colors in 24b RGB.
VP8PlanarTo24b_SSE2(&in1, &in5, &in2, &in6, &in3, &in7);
_mm_storeu_si128(out + 0, in1);
_mm_storeu_si128(out + 1, in5);
_mm_storeu_si128(out + 2, in2);
_mm_storeu_si128(out + 3, in6);
_mm_storeu_si128(out + 4, in3);
_mm_storeu_si128(out + 5, in7);
in += 8;
out += 6;
num_pixels -= 32;
}
// left-overs
if (num_pixels > 0) {
VP8LConvertBGRAToRGB_C((const uint32_t*)in, num_pixels, (uint8_t*)out);
}
}
static void ConvertBGRAToRGBA_SSE2(const uint32_t* src,
int num_pixels, uint8_t* dst) {
const __m128i red_blue_mask = _mm_set1_epi32(0x00ff00ffu);
const __m128i* in = (const __m128i*)src;
__m128i* out = (__m128i*)dst;
while (num_pixels >= 8) {
const __m128i A1 = _mm_loadu_si128(in++);
const __m128i A2 = _mm_loadu_si128(in++);
const __m128i B1 = _mm_and_si128(A1, red_blue_mask); // R 0 B 0
const __m128i B2 = _mm_and_si128(A2, red_blue_mask); // R 0 B 0
const __m128i C1 = _mm_andnot_si128(red_blue_mask, A1); // 0 G 0 A
const __m128i C2 = _mm_andnot_si128(red_blue_mask, A2); // 0 G 0 A
const __m128i D1 = _mm_shufflelo_epi16(B1, _MM_SHUFFLE(2, 3, 0, 1));
const __m128i D2 = _mm_shufflelo_epi16(B2, _MM_SHUFFLE(2, 3, 0, 1));
const __m128i E1 = _mm_shufflehi_epi16(D1, _MM_SHUFFLE(2, 3, 0, 1));
const __m128i E2 = _mm_shufflehi_epi16(D2, _MM_SHUFFLE(2, 3, 0, 1));
const __m128i F1 = _mm_or_si128(E1, C1);
const __m128i F2 = _mm_or_si128(E2, C2);
_mm_storeu_si128(out++, F1);
_mm_storeu_si128(out++, F2);
num_pixels -= 8;
}
// left-overs
if (num_pixels > 0) {
VP8LConvertBGRAToRGBA_C((const uint32_t*)in, num_pixels, (uint8_t*)out);
}
}
static void ConvertBGRAToRGBA4444_SSE2(const uint32_t* src,
int num_pixels, uint8_t* dst) {
const __m128i mask_0x0f = _mm_set1_epi8(0x0f);
const __m128i mask_0xf0 = _mm_set1_epi8(0xf0);
const __m128i* in = (const __m128i*)src;
__m128i* out = (__m128i*)dst;
while (num_pixels >= 8) {
const __m128i bgra0 = _mm_loadu_si128(in++); // bgra0|bgra1|bgra2|bgra3
const __m128i bgra4 = _mm_loadu_si128(in++); // bgra4|bgra5|bgra6|bgra7
const __m128i v0l = _mm_unpacklo_epi8(bgra0, bgra4); // b0b4g0g4r0r4a0a4...
const __m128i v0h = _mm_unpackhi_epi8(bgra0, bgra4); // b2b6g2g6r2r6a2a6...
const __m128i v1l = _mm_unpacklo_epi8(v0l, v0h); // b0b2b4b6g0g2g4g6...
const __m128i v1h = _mm_unpackhi_epi8(v0l, v0h); // b1b3b5b7g1g3g5g7...
const __m128i v2l = _mm_unpacklo_epi8(v1l, v1h); // b0...b7 | g0...g7
const __m128i v2h = _mm_unpackhi_epi8(v1l, v1h); // r0...r7 | a0...a7
const __m128i ga0 = _mm_unpackhi_epi64(v2l, v2h); // g0...g7 | a0...a7
const __m128i rb0 = _mm_unpacklo_epi64(v2h, v2l); // r0...r7 | b0...b7
const __m128i ga1 = _mm_srli_epi16(ga0, 4); // g0-|g1-|...|a6-|a7-
const __m128i rb1 = _mm_and_si128(rb0, mask_0xf0); // -r0|-r1|...|-b6|-a7
const __m128i ga2 = _mm_and_si128(ga1, mask_0x0f); // g0-|g1-|...|a6-|a7-
const __m128i rgba0 = _mm_or_si128(ga2, rb1); // rg0..rg7 | ba0..ba7
const __m128i rgba1 = _mm_srli_si128(rgba0, 8); // ba0..ba7 | 0
#if (WEBP_SWAP_16BIT_CSP == 1)
const __m128i rgba = _mm_unpacklo_epi8(rgba1, rgba0); // barg0...barg7
#else
const __m128i rgba = _mm_unpacklo_epi8(rgba0, rgba1); // rgba0...rgba7
#endif
_mm_storeu_si128(out++, rgba);
num_pixels -= 8;
}
// left-overs
if (num_pixels > 0) {
VP8LConvertBGRAToRGBA4444_C((const uint32_t*)in, num_pixels, (uint8_t*)out);
}
}
static void ConvertBGRAToRGB565_SSE2(const uint32_t* src,
int num_pixels, uint8_t* dst) {
const __m128i mask_0xe0 = _mm_set1_epi8(0xe0);
const __m128i mask_0xf8 = _mm_set1_epi8(0xf8);
const __m128i mask_0x07 = _mm_set1_epi8(0x07);
const __m128i* in = (const __m128i*)src;
__m128i* out = (__m128i*)dst;
while (num_pixels >= 8) {
const __m128i bgra0 = _mm_loadu_si128(in++); // bgra0|bgra1|bgra2|bgra3
const __m128i bgra4 = _mm_loadu_si128(in++); // bgra4|bgra5|bgra6|bgra7
const __m128i v0l = _mm_unpacklo_epi8(bgra0, bgra4); // b0b4g0g4r0r4a0a4...
const __m128i v0h = _mm_unpackhi_epi8(bgra0, bgra4); // b2b6g2g6r2r6a2a6...
const __m128i v1l = _mm_unpacklo_epi8(v0l, v0h); // b0b2b4b6g0g2g4g6...
const __m128i v1h = _mm_unpackhi_epi8(v0l, v0h); // b1b3b5b7g1g3g5g7...
const __m128i v2l = _mm_unpacklo_epi8(v1l, v1h); // b0...b7 | g0...g7
const __m128i v2h = _mm_unpackhi_epi8(v1l, v1h); // r0...r7 | a0...a7
const __m128i ga0 = _mm_unpackhi_epi64(v2l, v2h); // g0...g7 | a0...a7
const __m128i rb0 = _mm_unpacklo_epi64(v2h, v2l); // r0...r7 | b0...b7
const __m128i rb1 = _mm_and_si128(rb0, mask_0xf8); // -r0..-r7|-b0..-b7
const __m128i g_lo1 = _mm_srli_epi16(ga0, 5);
const __m128i g_lo2 = _mm_and_si128(g_lo1, mask_0x07); // g0-...g7-|xx (3b)
const __m128i g_hi1 = _mm_slli_epi16(ga0, 3);
const __m128i g_hi2 = _mm_and_si128(g_hi1, mask_0xe0); // -g0...-g7|xx (3b)
const __m128i b0 = _mm_srli_si128(rb1, 8); // -b0...-b7|0
const __m128i rg1 = _mm_or_si128(rb1, g_lo2); // gr0...gr7|xx
const __m128i b1 = _mm_srli_epi16(b0, 3);
const __m128i gb1 = _mm_or_si128(b1, g_hi2); // bg0...bg7|xx
#if (WEBP_SWAP_16BIT_CSP == 1)
const __m128i rgba = _mm_unpacklo_epi8(gb1, rg1); // rggb0...rggb7
#else
const __m128i rgba = _mm_unpacklo_epi8(rg1, gb1); // bgrb0...bgrb7
#endif
_mm_storeu_si128(out++, rgba);
num_pixels -= 8;
}
// left-overs
if (num_pixels > 0) {
VP8LConvertBGRAToRGB565_C((const uint32_t*)in, num_pixels, (uint8_t*)out);
}
}
static void ConvertBGRAToBGR_SSE2(const uint32_t* src,
int num_pixels, uint8_t* dst) {
const __m128i mask_l = _mm_set_epi32(0, 0x00ffffff, 0, 0x00ffffff);
const __m128i mask_h = _mm_set_epi32(0x00ffffff, 0, 0x00ffffff, 0);
const __m128i* in = (const __m128i*)src;
const uint8_t* const end = dst + num_pixels * 3;
// the last storel_epi64 below writes 8 bytes starting at offset 18
while (dst + 26 <= end) {
const __m128i bgra0 = _mm_loadu_si128(in++); // bgra0|bgra1|bgra2|bgra3
const __m128i bgra4 = _mm_loadu_si128(in++); // bgra4|bgra5|bgra6|bgra7
const __m128i a0l = _mm_and_si128(bgra0, mask_l); // bgr0|0|bgr0|0
const __m128i a4l = _mm_and_si128(bgra4, mask_l); // bgr0|0|bgr0|0
const __m128i a0h = _mm_and_si128(bgra0, mask_h); // 0|bgr0|0|bgr0
const __m128i a4h = _mm_and_si128(bgra4, mask_h); // 0|bgr0|0|bgr0
const __m128i b0h = _mm_srli_epi64(a0h, 8); // 000b|gr00|000b|gr00
const __m128i b4h = _mm_srli_epi64(a4h, 8); // 000b|gr00|000b|gr00
const __m128i c0 = _mm_or_si128(a0l, b0h); // rgbrgb00|rgbrgb00
const __m128i c4 = _mm_or_si128(a4l, b4h); // rgbrgb00|rgbrgb00
const __m128i c2 = _mm_srli_si128(c0, 8);
const __m128i c6 = _mm_srli_si128(c4, 8);
_mm_storel_epi64((__m128i*)(dst + 0), c0);
_mm_storel_epi64((__m128i*)(dst + 6), c2);
_mm_storel_epi64((__m128i*)(dst + 12), c4);
_mm_storel_epi64((__m128i*)(dst + 18), c6);
dst += 24;
num_pixels -= 8;
}
// left-overs
if (num_pixels > 0) {
VP8LConvertBGRAToBGR_C((const uint32_t*)in, num_pixels, dst);
}
}
//------------------------------------------------------------------------------
// Entry point
extern void VP8LDspInitSSE2(void);
WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInitSSE2(void) {
VP8LPredictors[5] = Predictor5_SSE2;
VP8LPredictors[6] = Predictor6_SSE2;
VP8LPredictors[7] = Predictor7_SSE2;
VP8LPredictors[8] = Predictor8_SSE2;
VP8LPredictors[9] = Predictor9_SSE2;
VP8LPredictors[10] = Predictor10_SSE2;
VP8LPredictors[11] = Predictor11_SSE2;
VP8LPredictors[12] = Predictor12_SSE2;
VP8LPredictors[13] = Predictor13_SSE2;
VP8LPredictorsAdd[0] = PredictorAdd0_SSE2;
VP8LPredictorsAdd[1] = PredictorAdd1_SSE2;
VP8LPredictorsAdd[2] = PredictorAdd2_SSE2;
VP8LPredictorsAdd[3] = PredictorAdd3_SSE2;
VP8LPredictorsAdd[4] = PredictorAdd4_SSE2;
VP8LPredictorsAdd[5] = PredictorAdd5_SSE2;
VP8LPredictorsAdd[6] = PredictorAdd6_SSE2;
VP8LPredictorsAdd[7] = PredictorAdd7_SSE2;
VP8LPredictorsAdd[8] = PredictorAdd8_SSE2;
VP8LPredictorsAdd[9] = PredictorAdd9_SSE2;
VP8LPredictorsAdd[10] = PredictorAdd10_SSE2;
VP8LPredictorsAdd[11] = PredictorAdd11_SSE2;
VP8LPredictorsAdd[12] = PredictorAdd12_SSE2;
VP8LPredictorsAdd[13] = PredictorAdd13_SSE2;
VP8LAddGreenToBlueAndRed = AddGreenToBlueAndRed_SSE2;
VP8LTransformColorInverse = TransformColorInverse_SSE2;
VP8LConvertBGRAToRGB = ConvertBGRAToRGB_SSE2;
VP8LConvertBGRAToRGBA = ConvertBGRAToRGBA_SSE2;
VP8LConvertBGRAToRGBA4444 = ConvertBGRAToRGBA4444_SSE2;
VP8LConvertBGRAToRGB565 = ConvertBGRAToRGB565_SSE2;
VP8LConvertBGRAToBGR = ConvertBGRAToBGR_SSE2;
}
#else // !WEBP_USE_SSE2
WEBP_DSP_INIT_STUB(VP8LDspInitSSE2)
#endif // WEBP_USE_SSE2
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