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libwebp/src/dsp/enc_sse2.c
Pascal Massimino 0ae2c2e4b2 SSE2/SSE41: optimize SSE_16xN loops 
After several trials at re-organizing the main loop and accumulation scheme,
this is apparently the faster variant.

removed the SSE41 version, which is no longer faster now.
For some reason, the AVX variant seems to benefit most for the change.

Change-Id: Ib11ee18dbb69596cee1a3a289af8e2b4253de7b5
2015-07-02 20:55:04 +02:00

1474 lines
57 KiB
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// Copyright 2011 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 version of speed-critical encoding functions.
//
// Author: Christian Duvivier (cduvivier@google.com)
#include "./dsp.h"
#if defined(WEBP_USE_SSE2)
#include <stdlib.h> // for abs()
#include <emmintrin.h>
#include "../enc/cost.h"
#include "../enc/vp8enci.h"
#include "../utils/utils.h"
//------------------------------------------------------------------------------
// Quite useful macro for debugging. Left here for convenience.
#if 0
#include <stdio.h>
static void PrintReg(const __m128i r, const char* const name, int size) {
int n;
union {
__m128i r;
uint8_t i8[16];
uint16_t i16[8];
uint32_t i32[4];
uint64_t i64[2];
} tmp;
tmp.r = r;
fprintf(stderr, "%s\t: ", name);
if (size == 8) {
for (n = 0; n < 16; ++n) fprintf(stderr, "%.2x ", tmp.i8[n]);
} else if (size == 16) {
for (n = 0; n < 8; ++n) fprintf(stderr, "%.4x ", tmp.i16[n]);
} else if (size == 32) {
for (n = 0; n < 4; ++n) fprintf(stderr, "%.8x ", tmp.i32[n]);
} else {
for (n = 0; n < 2; ++n) fprintf(stderr, "%.16lx ", tmp.i64[n]);
}
fprintf(stderr, "\n");
}
#endif
//------------------------------------------------------------------------------
// Transforms (Paragraph 14.4)
// Does one or two inverse transforms.
static void ITransform(const uint8_t* ref, const int16_t* in, uint8_t* dst,
int do_two) {
// This implementation makes use of 16-bit fixed point versions of two
// multiply constants:
// K1 = sqrt(2) * cos (pi/8) ~= 85627 / 2^16
// K2 = sqrt(2) * sin (pi/8) ~= 35468 / 2^16
//
// To be able to use signed 16-bit integers, we use the following trick to
// have constants within range:
// - Associated constants are obtained by subtracting the 16-bit fixed point
// version of one:
// k = K - (1 << 16) => K = k + (1 << 16)
// K1 = 85267 => k1 = 20091
// K2 = 35468 => k2 = -30068
// - The multiplication of a variable by a constant become the sum of the
// variable and the multiplication of that variable by the associated
// constant:
// (x * K) >> 16 = (x * (k + (1 << 16))) >> 16 = ((x * k ) >> 16) + x
const __m128i k1 = _mm_set1_epi16(20091);
const __m128i k2 = _mm_set1_epi16(-30068);
__m128i T0, T1, T2, T3;
// Load and concatenate the transform coefficients (we'll do two inverse
// transforms in parallel). In the case of only one inverse transform, the
// second half of the vectors will just contain random value we'll never
// use nor store.
__m128i in0, in1, in2, in3;
{
in0 = _mm_loadl_epi64((const __m128i*)&in[0]);
in1 = _mm_loadl_epi64((const __m128i*)&in[4]);
in2 = _mm_loadl_epi64((const __m128i*)&in[8]);
in3 = _mm_loadl_epi64((const __m128i*)&in[12]);
// a00 a10 a20 a30 x x x x
// a01 a11 a21 a31 x x x x
// a02 a12 a22 a32 x x x x
// a03 a13 a23 a33 x x x x
if (do_two) {
const __m128i inB0 = _mm_loadl_epi64((const __m128i*)&in[16]);
const __m128i inB1 = _mm_loadl_epi64((const __m128i*)&in[20]);
const __m128i inB2 = _mm_loadl_epi64((const __m128i*)&in[24]);
const __m128i inB3 = _mm_loadl_epi64((const __m128i*)&in[28]);
in0 = _mm_unpacklo_epi64(in0, inB0);
in1 = _mm_unpacklo_epi64(in1, inB1);
in2 = _mm_unpacklo_epi64(in2, inB2);
in3 = _mm_unpacklo_epi64(in3, inB3);
// a00 a10 a20 a30 b00 b10 b20 b30
// a01 a11 a21 a31 b01 b11 b21 b31
// a02 a12 a22 a32 b02 b12 b22 b32
// a03 a13 a23 a33 b03 b13 b23 b33
}
}
// Vertical pass and subsequent transpose.
{
// First pass, c and d calculations are longer because of the "trick"
// multiplications.
const __m128i a = _mm_add_epi16(in0, in2);
const __m128i b = _mm_sub_epi16(in0, in2);
// c = MUL(in1, K2) - MUL(in3, K1) = MUL(in1, k2) - MUL(in3, k1) + in1 - in3
const __m128i c1 = _mm_mulhi_epi16(in1, k2);
const __m128i c2 = _mm_mulhi_epi16(in3, k1);
const __m128i c3 = _mm_sub_epi16(in1, in3);
const __m128i c4 = _mm_sub_epi16(c1, c2);
const __m128i c = _mm_add_epi16(c3, c4);
// d = MUL(in1, K1) + MUL(in3, K2) = MUL(in1, k1) + MUL(in3, k2) + in1 + in3
const __m128i d1 = _mm_mulhi_epi16(in1, k1);
const __m128i d2 = _mm_mulhi_epi16(in3, k2);
const __m128i d3 = _mm_add_epi16(in1, in3);
const __m128i d4 = _mm_add_epi16(d1, d2);
const __m128i d = _mm_add_epi16(d3, d4);
// Second pass.
const __m128i tmp0 = _mm_add_epi16(a, d);
const __m128i tmp1 = _mm_add_epi16(b, c);
const __m128i tmp2 = _mm_sub_epi16(b, c);
const __m128i tmp3 = _mm_sub_epi16(a, d);
// Transpose the two 4x4.
// a00 a01 a02 a03 b00 b01 b02 b03
// a10 a11 a12 a13 b10 b11 b12 b13
// a20 a21 a22 a23 b20 b21 b22 b23
// a30 a31 a32 a33 b30 b31 b32 b33
const __m128i transpose0_0 = _mm_unpacklo_epi16(tmp0, tmp1);
const __m128i transpose0_1 = _mm_unpacklo_epi16(tmp2, tmp3);
const __m128i transpose0_2 = _mm_unpackhi_epi16(tmp0, tmp1);
const __m128i transpose0_3 = _mm_unpackhi_epi16(tmp2, tmp3);
// a00 a10 a01 a11 a02 a12 a03 a13
// a20 a30 a21 a31 a22 a32 a23 a33
// b00 b10 b01 b11 b02 b12 b03 b13
// b20 b30 b21 b31 b22 b32 b23 b33
const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1);
const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3);
const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1);
const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3);
// a00 a10 a20 a30 a01 a11 a21 a31
// b00 b10 b20 b30 b01 b11 b21 b31
// a02 a12 a22 a32 a03 a13 a23 a33
// b02 b12 a22 b32 b03 b13 b23 b33
T0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1);
T1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1);
T2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3);
T3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3);
// a00 a10 a20 a30 b00 b10 b20 b30
// a01 a11 a21 a31 b01 b11 b21 b31
// a02 a12 a22 a32 b02 b12 b22 b32
// a03 a13 a23 a33 b03 b13 b23 b33
}
// Horizontal pass and subsequent transpose.
{
// First pass, c and d calculations are longer because of the "trick"
// multiplications.
const __m128i four = _mm_set1_epi16(4);
const __m128i dc = _mm_add_epi16(T0, four);
const __m128i a = _mm_add_epi16(dc, T2);
const __m128i b = _mm_sub_epi16(dc, T2);
// c = MUL(T1, K2) - MUL(T3, K1) = MUL(T1, k2) - MUL(T3, k1) + T1 - T3
const __m128i c1 = _mm_mulhi_epi16(T1, k2);
const __m128i c2 = _mm_mulhi_epi16(T3, k1);
const __m128i c3 = _mm_sub_epi16(T1, T3);
const __m128i c4 = _mm_sub_epi16(c1, c2);
const __m128i c = _mm_add_epi16(c3, c4);
// d = MUL(T1, K1) + MUL(T3, K2) = MUL(T1, k1) + MUL(T3, k2) + T1 + T3
const __m128i d1 = _mm_mulhi_epi16(T1, k1);
const __m128i d2 = _mm_mulhi_epi16(T3, k2);
const __m128i d3 = _mm_add_epi16(T1, T3);
const __m128i d4 = _mm_add_epi16(d1, d2);
const __m128i d = _mm_add_epi16(d3, d4);
// Second pass.
const __m128i tmp0 = _mm_add_epi16(a, d);
const __m128i tmp1 = _mm_add_epi16(b, c);
const __m128i tmp2 = _mm_sub_epi16(b, c);
const __m128i tmp3 = _mm_sub_epi16(a, d);
const __m128i shifted0 = _mm_srai_epi16(tmp0, 3);
const __m128i shifted1 = _mm_srai_epi16(tmp1, 3);
const __m128i shifted2 = _mm_srai_epi16(tmp2, 3);
const __m128i shifted3 = _mm_srai_epi16(tmp3, 3);
// Transpose the two 4x4.
// a00 a01 a02 a03 b00 b01 b02 b03
// a10 a11 a12 a13 b10 b11 b12 b13
// a20 a21 a22 a23 b20 b21 b22 b23
// a30 a31 a32 a33 b30 b31 b32 b33
const __m128i transpose0_0 = _mm_unpacklo_epi16(shifted0, shifted1);
const __m128i transpose0_1 = _mm_unpacklo_epi16(shifted2, shifted3);
const __m128i transpose0_2 = _mm_unpackhi_epi16(shifted0, shifted1);
const __m128i transpose0_3 = _mm_unpackhi_epi16(shifted2, shifted3);
// a00 a10 a01 a11 a02 a12 a03 a13
// a20 a30 a21 a31 a22 a32 a23 a33
// b00 b10 b01 b11 b02 b12 b03 b13
// b20 b30 b21 b31 b22 b32 b23 b33
const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1);
const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3);
const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1);
const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3);
// a00 a10 a20 a30 a01 a11 a21 a31
// b00 b10 b20 b30 b01 b11 b21 b31
// a02 a12 a22 a32 a03 a13 a23 a33
// b02 b12 a22 b32 b03 b13 b23 b33
T0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1);
T1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1);
T2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3);
T3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3);
// a00 a10 a20 a30 b00 b10 b20 b30
// a01 a11 a21 a31 b01 b11 b21 b31
// a02 a12 a22 a32 b02 b12 b22 b32
// a03 a13 a23 a33 b03 b13 b23 b33
}
// Add inverse transform to 'ref' and store.
{
const __m128i zero = _mm_setzero_si128();
// Load the reference(s).
__m128i ref0, ref1, ref2, ref3;
if (do_two) {
// Load eight bytes/pixels per line.
ref0 = _mm_loadl_epi64((const __m128i*)&ref[0 * BPS]);
ref1 = _mm_loadl_epi64((const __m128i*)&ref[1 * BPS]);
ref2 = _mm_loadl_epi64((const __m128i*)&ref[2 * BPS]);
ref3 = _mm_loadl_epi64((const __m128i*)&ref[3 * BPS]);
} else {
// Load four bytes/pixels per line.
ref0 = _mm_cvtsi32_si128(*(const int*)&ref[0 * BPS]);
ref1 = _mm_cvtsi32_si128(*(const int*)&ref[1 * BPS]);
ref2 = _mm_cvtsi32_si128(*(const int*)&ref[2 * BPS]);
ref3 = _mm_cvtsi32_si128(*(const int*)&ref[3 * BPS]);
}
// Convert to 16b.
ref0 = _mm_unpacklo_epi8(ref0, zero);
ref1 = _mm_unpacklo_epi8(ref1, zero);
ref2 = _mm_unpacklo_epi8(ref2, zero);
ref3 = _mm_unpacklo_epi8(ref3, zero);
// Add the inverse transform(s).
ref0 = _mm_add_epi16(ref0, T0);
ref1 = _mm_add_epi16(ref1, T1);
ref2 = _mm_add_epi16(ref2, T2);
ref3 = _mm_add_epi16(ref3, T3);
// Unsigned saturate to 8b.
ref0 = _mm_packus_epi16(ref0, ref0);
ref1 = _mm_packus_epi16(ref1, ref1);
ref2 = _mm_packus_epi16(ref2, ref2);
ref3 = _mm_packus_epi16(ref3, ref3);
// Store the results.
if (do_two) {
// Store eight bytes/pixels per line.
_mm_storel_epi64((__m128i*)&dst[0 * BPS], ref0);
_mm_storel_epi64((__m128i*)&dst[1 * BPS], ref1);
_mm_storel_epi64((__m128i*)&dst[2 * BPS], ref2);
_mm_storel_epi64((__m128i*)&dst[3 * BPS], ref3);
} else {
// Store four bytes/pixels per line.
*((int32_t *)&dst[0 * BPS]) = _mm_cvtsi128_si32(ref0);
*((int32_t *)&dst[1 * BPS]) = _mm_cvtsi128_si32(ref1);
*((int32_t *)&dst[2 * BPS]) = _mm_cvtsi128_si32(ref2);
*((int32_t *)&dst[3 * BPS]) = _mm_cvtsi128_si32(ref3);
}
}
}
static void FTransformPass1(const __m128i* const in01,
const __m128i* const in23,
__m128i* const out01,
__m128i* const out32) {
const __m128i k937 = _mm_set1_epi32(937);
const __m128i k1812 = _mm_set1_epi32(1812);
const __m128i k88p = _mm_set_epi16(8, 8, 8, 8, 8, 8, 8, 8);
const __m128i k88m = _mm_set_epi16(-8, 8, -8, 8, -8, 8, -8, 8);
const __m128i k5352_2217p = _mm_set_epi16(2217, 5352, 2217, 5352,
2217, 5352, 2217, 5352);
const __m128i k5352_2217m = _mm_set_epi16(-5352, 2217, -5352, 2217,
-5352, 2217, -5352, 2217);
// *in01 = 00 01 10 11 02 03 12 13
// *in23 = 20 21 30 31 22 23 32 33
const __m128i shuf01_p = _mm_shufflehi_epi16(*in01, _MM_SHUFFLE(2, 3, 0, 1));
const __m128i shuf23_p = _mm_shufflehi_epi16(*in23, _MM_SHUFFLE(2, 3, 0, 1));
// 00 01 10 11 03 02 13 12
// 20 21 30 31 23 22 33 32
const __m128i s01 = _mm_unpacklo_epi64(shuf01_p, shuf23_p);
const __m128i s32 = _mm_unpackhi_epi64(shuf01_p, shuf23_p);
// 00 01 10 11 20 21 30 31
// 03 02 13 12 23 22 33 32
const __m128i a01 = _mm_add_epi16(s01, s32);
const __m128i a32 = _mm_sub_epi16(s01, s32);
// [d0 + d3 | d1 + d2 | ...] = [a0 a1 | a0' a1' | ... ]
// [d0 - d3 | d1 - d2 | ...] = [a3 a2 | a3' a2' | ... ]
const __m128i tmp0 = _mm_madd_epi16(a01, k88p); // [ (a0 + a1) << 3, ... ]
const __m128i tmp2 = _mm_madd_epi16(a01, k88m); // [ (a0 - a1) << 3, ... ]
const __m128i tmp1_1 = _mm_madd_epi16(a32, k5352_2217p);
const __m128i tmp3_1 = _mm_madd_epi16(a32, k5352_2217m);
const __m128i tmp1_2 = _mm_add_epi32(tmp1_1, k1812);
const __m128i tmp3_2 = _mm_add_epi32(tmp3_1, k937);
const __m128i tmp1 = _mm_srai_epi32(tmp1_2, 9);
const __m128i tmp3 = _mm_srai_epi32(tmp3_2, 9);
const __m128i s03 = _mm_packs_epi32(tmp0, tmp2);
const __m128i s12 = _mm_packs_epi32(tmp1, tmp3);
const __m128i s_lo = _mm_unpacklo_epi16(s03, s12); // 0 1 0 1 0 1...
const __m128i s_hi = _mm_unpackhi_epi16(s03, s12); // 2 3 2 3 2 3
const __m128i v23 = _mm_unpackhi_epi32(s_lo, s_hi);
*out01 = _mm_unpacklo_epi32(s_lo, s_hi);
*out32 = _mm_shuffle_epi32(v23, _MM_SHUFFLE(1, 0, 3, 2)); // 3 2 3 2 3 2..
}
static void FTransformPass2(const __m128i* const v01, const __m128i* const v32,
int16_t* out) {
const __m128i zero = _mm_setzero_si128();
const __m128i seven = _mm_set1_epi16(7);
const __m128i k5352_2217 = _mm_set_epi16(5352, 2217, 5352, 2217,
5352, 2217, 5352, 2217);
const __m128i k2217_5352 = _mm_set_epi16(2217, -5352, 2217, -5352,
2217, -5352, 2217, -5352);
const __m128i k12000_plus_one = _mm_set1_epi32(12000 + (1 << 16));
const __m128i k51000 = _mm_set1_epi32(51000);
// Same operations are done on the (0,3) and (1,2) pairs.
// a0 = v0 + v3
// a1 = v1 + v2
// a3 = v0 - v3
// a2 = v1 - v2
const __m128i a01 = _mm_add_epi16(*v01, *v32);
const __m128i a32 = _mm_sub_epi16(*v01, *v32);
const __m128i a11 = _mm_unpackhi_epi64(a01, a01);
const __m128i a22 = _mm_unpackhi_epi64(a32, a32);
const __m128i a01_plus_7 = _mm_add_epi16(a01, seven);
// d0 = (a0 + a1 + 7) >> 4;
// d2 = (a0 - a1 + 7) >> 4;
const __m128i c0 = _mm_add_epi16(a01_plus_7, a11);
const __m128i c2 = _mm_sub_epi16(a01_plus_7, a11);
const __m128i d0 = _mm_srai_epi16(c0, 4);
const __m128i d2 = _mm_srai_epi16(c2, 4);
// f1 = ((b3 * 5352 + b2 * 2217 + 12000) >> 16)
// f3 = ((b3 * 2217 - b2 * 5352 + 51000) >> 16)
const __m128i b23 = _mm_unpacklo_epi16(a22, a32);
const __m128i c1 = _mm_madd_epi16(b23, k5352_2217);
const __m128i c3 = _mm_madd_epi16(b23, k2217_5352);
const __m128i d1 = _mm_add_epi32(c1, k12000_plus_one);
const __m128i d3 = _mm_add_epi32(c3, k51000);
const __m128i e1 = _mm_srai_epi32(d1, 16);
const __m128i e3 = _mm_srai_epi32(d3, 16);
const __m128i f1 = _mm_packs_epi32(e1, e1);
const __m128i f3 = _mm_packs_epi32(e3, e3);
// f1 = f1 + (a3 != 0);
// The compare will return (0xffff, 0) for (==0, !=0). To turn that into the
// desired (0, 1), we add one earlier through k12000_plus_one.
// -> f1 = f1 + 1 - (a3 == 0)
const __m128i g1 = _mm_add_epi16(f1, _mm_cmpeq_epi16(a32, zero));
const __m128i d0_g1 = _mm_unpacklo_epi64(d0, g1);
const __m128i d2_f3 = _mm_unpacklo_epi64(d2, f3);
_mm_storeu_si128((__m128i*)&out[0], d0_g1);
_mm_storeu_si128((__m128i*)&out[8], d2_f3);
}
static void FTransform(const uint8_t* src, const uint8_t* ref, int16_t* out) {
const __m128i zero = _mm_setzero_si128();
// Load src and convert to 16b.
const __m128i src0 = _mm_loadl_epi64((const __m128i*)&src[0 * BPS]);
const __m128i src1 = _mm_loadl_epi64((const __m128i*)&src[1 * BPS]);
const __m128i src2 = _mm_loadl_epi64((const __m128i*)&src[2 * BPS]);
const __m128i src3 = _mm_loadl_epi64((const __m128i*)&src[3 * BPS]);
const __m128i src_0 = _mm_unpacklo_epi8(src0, zero);
const __m128i src_1 = _mm_unpacklo_epi8(src1, zero);
const __m128i src_2 = _mm_unpacklo_epi8(src2, zero);
const __m128i src_3 = _mm_unpacklo_epi8(src3, zero);
// Load ref and convert to 16b.
const __m128i ref0 = _mm_loadl_epi64((const __m128i*)&ref[0 * BPS]);
const __m128i ref1 = _mm_loadl_epi64((const __m128i*)&ref[1 * BPS]);
const __m128i ref2 = _mm_loadl_epi64((const __m128i*)&ref[2 * BPS]);
const __m128i ref3 = _mm_loadl_epi64((const __m128i*)&ref[3 * BPS]);
const __m128i ref_0 = _mm_unpacklo_epi8(ref0, zero);
const __m128i ref_1 = _mm_unpacklo_epi8(ref1, zero);
const __m128i ref_2 = _mm_unpacklo_epi8(ref2, zero);
const __m128i ref_3 = _mm_unpacklo_epi8(ref3, zero);
// Compute difference. -> 00 01 02 03 00 00 00 00
const __m128i diff0 = _mm_sub_epi16(src_0, ref_0);
const __m128i diff1 = _mm_sub_epi16(src_1, ref_1);
const __m128i diff2 = _mm_sub_epi16(src_2, ref_2);
const __m128i diff3 = _mm_sub_epi16(src_3, ref_3);
// Unpack and shuffle
// 00 01 02 03 0 0 0 0
// 10 11 12 13 0 0 0 0
// 20 21 22 23 0 0 0 0
// 30 31 32 33 0 0 0 0
const __m128i shuf01 = _mm_unpacklo_epi32(diff0, diff1);
const __m128i shuf23 = _mm_unpacklo_epi32(diff2, diff3);
__m128i v01, v32;
// First pass
FTransformPass1(&shuf01, &shuf23, &v01, &v32);
// Second pass
FTransformPass2(&v01, &v32, out);
}
static void FTransform2(const uint8_t* src, const uint8_t* ref, int16_t* out) {
const __m128i zero = _mm_setzero_si128();
// Load src and convert to 16b.
const __m128i src0 = _mm_loadl_epi64((const __m128i*)&src[0 * BPS]);
const __m128i src1 = _mm_loadl_epi64((const __m128i*)&src[1 * BPS]);
const __m128i src2 = _mm_loadl_epi64((const __m128i*)&src[2 * BPS]);
const __m128i src3 = _mm_loadl_epi64((const __m128i*)&src[3 * BPS]);
const __m128i src_0 = _mm_unpacklo_epi8(src0, zero);
const __m128i src_1 = _mm_unpacklo_epi8(src1, zero);
const __m128i src_2 = _mm_unpacklo_epi8(src2, zero);
const __m128i src_3 = _mm_unpacklo_epi8(src3, zero);
// Load ref and convert to 16b.
const __m128i ref0 = _mm_loadl_epi64((const __m128i*)&ref[0 * BPS]);
const __m128i ref1 = _mm_loadl_epi64((const __m128i*)&ref[1 * BPS]);
const __m128i ref2 = _mm_loadl_epi64((const __m128i*)&ref[2 * BPS]);
const __m128i ref3 = _mm_loadl_epi64((const __m128i*)&ref[3 * BPS]);
const __m128i ref_0 = _mm_unpacklo_epi8(ref0, zero);
const __m128i ref_1 = _mm_unpacklo_epi8(ref1, zero);
const __m128i ref_2 = _mm_unpacklo_epi8(ref2, zero);
const __m128i ref_3 = _mm_unpacklo_epi8(ref3, zero);
// Compute difference. -> 00 01 02 03 00' 01' 02' 03'
const __m128i diff0 = _mm_sub_epi16(src_0, ref_0);
const __m128i diff1 = _mm_sub_epi16(src_1, ref_1);
const __m128i diff2 = _mm_sub_epi16(src_2, ref_2);
const __m128i diff3 = _mm_sub_epi16(src_3, ref_3);
// Unpack and shuffle
// 00 01 02 03 0 0 0 0
// 10 11 12 13 0 0 0 0
// 20 21 22 23 0 0 0 0
// 30 31 32 33 0 0 0 0
const __m128i shuf01l = _mm_unpacklo_epi32(diff0, diff1);
const __m128i shuf23l = _mm_unpacklo_epi32(diff2, diff3);
const __m128i shuf01h = _mm_unpackhi_epi32(diff0, diff1);
const __m128i shuf23h = _mm_unpackhi_epi32(diff2, diff3);
__m128i v01l, v32l;
__m128i v01h, v32h;
// First pass
FTransformPass1(&shuf01l, &shuf23l, &v01l, &v32l);
FTransformPass1(&shuf01h, &shuf23h, &v01h, &v32h);
// Second pass
FTransformPass2(&v01l, &v32l, out + 0);
FTransformPass2(&v01h, &v32h, out + 16);
}
static void FTransformWHTRow(const int16_t* const in, __m128i* const out) {
const __m128i kMult1 = _mm_set_epi16(0, 0, 0, 0, 1, 1, 1, 1);
const __m128i kMult2 = _mm_set_epi16(0, 0, 0, 0, -1, 1, -1, 1);
const __m128i src0 = _mm_loadl_epi64((__m128i*)&in[0 * 16]);
const __m128i src1 = _mm_loadl_epi64((__m128i*)&in[1 * 16]);
const __m128i src2 = _mm_loadl_epi64((__m128i*)&in[2 * 16]);
const __m128i src3 = _mm_loadl_epi64((__m128i*)&in[3 * 16]);
const __m128i A01 = _mm_unpacklo_epi16(src0, src1); // A0 A1 | ...
const __m128i A23 = _mm_unpacklo_epi16(src2, src3); // A2 A3 | ...
const __m128i B0 = _mm_adds_epi16(A01, A23); // a0 | a1 | ...
const __m128i B1 = _mm_subs_epi16(A01, A23); // a3 | a2 | ...
const __m128i C0 = _mm_unpacklo_epi32(B0, B1); // a0 | a1 | a3 | a2
const __m128i C1 = _mm_unpacklo_epi32(B1, B0); // a3 | a2 | a0 | a1
const __m128i D0 = _mm_madd_epi16(C0, kMult1); // out0, out1
const __m128i D1 = _mm_madd_epi16(C1, kMult2); // out2, out3
*out = _mm_unpacklo_epi64(D0, D1);
}
static void FTransformWHT(const int16_t* in, int16_t* out) {
__m128i row0, row1, row2, row3;
FTransformWHTRow(in + 0 * 64, &row0);
FTransformWHTRow(in + 1 * 64, &row1);
FTransformWHTRow(in + 2 * 64, &row2);
FTransformWHTRow(in + 3 * 64, &row3);
{
const __m128i a0 = _mm_add_epi32(row0, row2);
const __m128i a1 = _mm_add_epi32(row1, row3);
const __m128i a2 = _mm_sub_epi32(row1, row3);
const __m128i a3 = _mm_sub_epi32(row0, row2);
const __m128i b0 = _mm_srai_epi32(_mm_add_epi32(a0, a1), 1);
const __m128i b1 = _mm_srai_epi32(_mm_add_epi32(a3, a2), 1);
const __m128i b2 = _mm_srai_epi32(_mm_sub_epi32(a3, a2), 1);
const __m128i b3 = _mm_srai_epi32(_mm_sub_epi32(a0, a1), 1);
const __m128i out0 = _mm_packs_epi32(b0, b1);
const __m128i out1 = _mm_packs_epi32(b2, b3);
_mm_storeu_si128((__m128i*)&out[0], out0);
_mm_storeu_si128((__m128i*)&out[8], out1);
}
}
//------------------------------------------------------------------------------
// Compute susceptibility based on DCT-coeff histograms:
// the higher, the "easier" the macroblock is to compress.
static void CollectHistogram(const uint8_t* ref, const uint8_t* pred,
int start_block, int end_block,
VP8Histogram* const histo) {
const __m128i zero = _mm_setzero_si128();
const __m128i max_coeff_thresh = _mm_set1_epi16(MAX_COEFF_THRESH);
int j;
int distribution[MAX_COEFF_THRESH + 1] = { 0 };
for (j = start_block; j < end_block; ++j) {
int16_t out[16];
int k;
FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out);
// Convert coefficients to bin (within out[]).
{
// Load.
const __m128i out0 = _mm_loadu_si128((__m128i*)&out[0]);
const __m128i out1 = _mm_loadu_si128((__m128i*)&out[8]);
const __m128i d0 = _mm_sub_epi16(zero, out0);
const __m128i d1 = _mm_sub_epi16(zero, out1);
const __m128i abs0 = _mm_max_epi16(out0, d0); // abs(v), 16b
const __m128i abs1 = _mm_max_epi16(out1, d1);
// v = abs(out) >> 3
const __m128i v0 = _mm_srai_epi16(abs0, 3);
const __m128i v1 = _mm_srai_epi16(abs1, 3);
// bin = min(v, MAX_COEFF_THRESH)
const __m128i bin0 = _mm_min_epi16(v0, max_coeff_thresh);
const __m128i bin1 = _mm_min_epi16(v1, max_coeff_thresh);
// Store.
_mm_storeu_si128((__m128i*)&out[0], bin0);
_mm_storeu_si128((__m128i*)&out[8], bin1);
}
// Convert coefficients to bin.
for (k = 0; k < 16; ++k) {
++distribution[out[k]];
}
}
VP8SetHistogramData(distribution, histo);
}
//------------------------------------------------------------------------------
// Intra predictions
// helper for chroma-DC predictions
static WEBP_INLINE void Put8x8uv(uint8_t v, uint8_t* dst) {
int j;
const __m128i values = _mm_set1_epi8(v);
for (j = 0; j < 8; ++j) {
_mm_storel_epi64((__m128i*)(dst + j * BPS), values);
}
}
static WEBP_INLINE void Put16(uint8_t v, uint8_t* dst) {
int j;
const __m128i values = _mm_set1_epi8(v);
for (j = 0; j < 16; ++j) {
_mm_store_si128((__m128i*)(dst + j * BPS), values);
}
}
static WEBP_INLINE void Fill(uint8_t* dst, int value, int size) {
if (size == 4) {
int j;
for (j = 0; j < 4; ++j) {
memset(dst + j * BPS, value, 4);
}
} else if (size == 8) {
Put8x8uv(value, dst);
} else {
Put16(value, dst);
}
}
static WEBP_INLINE void VE8uv(uint8_t* dst, const uint8_t* top) {
int j;
const __m128i top_values = _mm_loadl_epi64((const __m128i*)top);
for (j = 0; j < 8; ++j) {
_mm_storel_epi64((__m128i*)(dst + j * BPS), top_values);
}
}
static WEBP_INLINE void VE16(uint8_t* dst, const uint8_t* top) {
const __m128i top_values = _mm_load_si128((const __m128i*)top);
int j;
for (j = 0; j < 16; ++j) {
_mm_store_si128((__m128i*)(dst + j * BPS), top_values);
}
}
static WEBP_INLINE void VerticalPred(uint8_t* dst,
const uint8_t* top, int size) {
if (top != NULL) {
if (size == 8) {
VE8uv(dst, top);
} else {
VE16(dst, top);
}
} else {
Fill(dst, 127, size);
}
}
static WEBP_INLINE void HE8uv(uint8_t* dst, const uint8_t* left) {
int j;
for (j = 0; j < 8; ++j) {
const __m128i values = _mm_set1_epi8(left[j]);
_mm_storel_epi64((__m128i*)dst, values);
dst += BPS;
}
}
static WEBP_INLINE void HE16(uint8_t* dst, const uint8_t* left) {
int j;
for (j = 0; j < 16; ++j) {
const __m128i values = _mm_set1_epi8(left[j]);
_mm_store_si128((__m128i*)dst, values);
dst += BPS;
}
}
static WEBP_INLINE void HorizontalPred(uint8_t* dst,
const uint8_t* left, int size) {
if (left != NULL) {
if (size == 8) {
HE8uv(dst, left);
} else {
HE16(dst, left);
}
} else {
Fill(dst, 129, size);
}
}
static WEBP_INLINE void TM(uint8_t* dst, const uint8_t* left,
const uint8_t* top, int size) {
const __m128i zero = _mm_setzero_si128();
int y;
if (size == 8) {
const __m128i top_values = _mm_loadl_epi64((const __m128i*)top);
const __m128i top_base = _mm_unpacklo_epi8(top_values, zero);
for (y = 0; y < 8; ++y, dst += BPS) {
const int val = left[y] - left[-1];
const __m128i base = _mm_set1_epi16(val);
const __m128i out = _mm_packus_epi16(_mm_add_epi16(base, top_base), zero);
_mm_storel_epi64((__m128i*)dst, out);
}
} else {
const __m128i top_values = _mm_load_si128((const __m128i*)top);
const __m128i top_base_0 = _mm_unpacklo_epi8(top_values, zero);
const __m128i top_base_1 = _mm_unpackhi_epi8(top_values, zero);
for (y = 0; y < 16; ++y, dst += BPS) {
const int val = left[y] - left[-1];
const __m128i base = _mm_set1_epi16(val);
const __m128i out_0 = _mm_add_epi16(base, top_base_0);
const __m128i out_1 = _mm_add_epi16(base, top_base_1);
const __m128i out = _mm_packus_epi16(out_0, out_1);
_mm_store_si128((__m128i*)dst, out);
}
}
}
static WEBP_INLINE void TrueMotion(uint8_t* dst, const uint8_t* left,
const uint8_t* top, int size) {
if (left != NULL) {
if (top != NULL) {
TM(dst, left, top, size);
} else {
HorizontalPred(dst, left, size);
}
} else {
// true motion without left samples (hence: with default 129 value)
// is equivalent to VE prediction where you just copy the top samples.
// Note that if top samples are not available, the default value is
// then 129, and not 127 as in the VerticalPred case.
if (top != NULL) {
VerticalPred(dst, top, size);
} else {
Fill(dst, 129, size);
}
}
}
static WEBP_INLINE void DC8uv(uint8_t* dst, const uint8_t* left,
const uint8_t* top) {
const __m128i zero = _mm_setzero_si128();
const __m128i top_values = _mm_loadl_epi64((const __m128i*)top);
const __m128i left_values = _mm_loadl_epi64((const __m128i*)left);
const __m128i sum_top = _mm_sad_epu8(top_values, zero);
const __m128i sum_left = _mm_sad_epu8(left_values, zero);
const int DC = _mm_cvtsi128_si32(sum_top) + _mm_cvtsi128_si32(sum_left) + 8;
Put8x8uv(DC >> 4, dst);
}
static WEBP_INLINE void DC8uvNoLeft(uint8_t* dst, const uint8_t* top) {
const __m128i zero = _mm_setzero_si128();
const __m128i top_values = _mm_loadl_epi64((const __m128i*)top);
const __m128i sum = _mm_sad_epu8(top_values, zero);
const int DC = _mm_cvtsi128_si32(sum) + 4;
Put8x8uv(DC >> 3, dst);
}
static WEBP_INLINE void DC8uvNoTop(uint8_t* dst, const uint8_t* left) {
// 'left' is contiguous so we can reuse the top summation.
DC8uvNoLeft(dst, left);
}
static WEBP_INLINE void DC8uvNoTopLeft(uint8_t* dst) {
Put8x8uv(0x80, dst);
}
static WEBP_INLINE void DC8uvMode(uint8_t* dst, const uint8_t* left,
const uint8_t* top) {
if (top != NULL) {
if (left != NULL) { // top and left present
DC8uv(dst, left, top);
} else { // top, but no left
DC8uvNoLeft(dst, top);
}
} else if (left != NULL) { // left but no top
DC8uvNoTop(dst, left);
} else { // no top, no left, nothing.
DC8uvNoTopLeft(dst);
}
}
static WEBP_INLINE void DC16(uint8_t* dst, const uint8_t* left,
const uint8_t* top) {
const __m128i zero = _mm_setzero_si128();
const __m128i top_row = _mm_load_si128((const __m128i*)top);
const __m128i left_row = _mm_load_si128((const __m128i*)left);
const __m128i sad8x2 = _mm_sad_epu8(top_row, zero);
// sum the two sads: sad8x2[0:1] + sad8x2[8:9]
const __m128i sum_top = _mm_add_epi16(sad8x2, _mm_shuffle_epi32(sad8x2, 2));
const __m128i sad8x2_left = _mm_sad_epu8(left_row, zero);
// sum the two sads: sad8x2[0:1] + sad8x2[8:9]
const __m128i sum_left =
_mm_add_epi16(sad8x2_left, _mm_shuffle_epi32(sad8x2_left, 2));
const int DC = _mm_cvtsi128_si32(sum_top) + _mm_cvtsi128_si32(sum_left) + 16;
Put16(DC >> 5, dst);
}
static WEBP_INLINE void DC16NoLeft(uint8_t* dst, const uint8_t* top) {
const __m128i zero = _mm_setzero_si128();
const __m128i top_row = _mm_load_si128((const __m128i*)top);
const __m128i sad8x2 = _mm_sad_epu8(top_row, zero);
// sum the two sads: sad8x2[0:1] + sad8x2[8:9]
const __m128i sum = _mm_add_epi16(sad8x2, _mm_shuffle_epi32(sad8x2, 2));
const int DC = _mm_cvtsi128_si32(sum) + 8;
Put16(DC >> 4, dst);
}
static WEBP_INLINE void DC16NoTop(uint8_t* dst, const uint8_t* left) {
// 'left' is contiguous so we can reuse the top summation.
DC16NoLeft(dst, left);
}
static WEBP_INLINE void DC16NoTopLeft(uint8_t* dst) {
Put16(0x80, dst);
}
static WEBP_INLINE void DC16Mode(uint8_t* dst, const uint8_t* left,
const uint8_t* top) {
if (top != NULL) {
if (left != NULL) { // top and left present
DC16(dst, left, top);
} else { // top, but no left
DC16NoLeft(dst, top);
}
} else if (left != NULL) { // left but no top
DC16NoTop(dst, left);
} else { // no top, no left, nothing.
DC16NoTopLeft(dst);
}
}
//------------------------------------------------------------------------------
// 4x4 predictions
#define DST(x, y) dst[(x) + (y) * BPS]
#define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2)
#define AVG2(a, b) (((a) + (b) + 1) >> 1)
// We use the following 8b-arithmetic tricks:
// (a + 2 * b + c + 2) >> 2 = (AC + b + 1) >> 1
// where: AC = (a + c) >> 1 = [(a + c + 1) >> 1] - [(a^c) & 1]
// and:
// (a + 2 * b + c + 2) >> 2 = (AB + BC + 1) >> 1 - (ab|bc)&lsb
// where: AC = (a + b + 1) >> 1, BC = (b + c + 1) >> 1
// and ab = a ^ b, bc = b ^ c, lsb = (AC^BC)&1
static WEBP_INLINE void VE4(uint8_t* dst, const uint8_t* top) { // vertical
const __m128i one = _mm_set1_epi8(1);
const __m128i ABCDEFGH = _mm_loadl_epi64((__m128i*)(top - 1));
const __m128i BCDEFGH0 = _mm_srli_si128(ABCDEFGH, 1);
const __m128i CDEFGH00 = _mm_srli_si128(ABCDEFGH, 2);
const __m128i a = _mm_avg_epu8(ABCDEFGH, CDEFGH00);
const __m128i lsb = _mm_and_si128(_mm_xor_si128(ABCDEFGH, CDEFGH00), one);
const __m128i b = _mm_subs_epu8(a, lsb);
const __m128i avg = _mm_avg_epu8(b, BCDEFGH0);
const uint32_t vals = _mm_cvtsi128_si32(avg);
int i;
for (i = 0; i < 4; ++i) {
*(uint32_t*)(dst + i * BPS) = vals;
}
}
static WEBP_INLINE void HE4(uint8_t* dst, const uint8_t* top) { // horizontal
const int X = top[-1];
const int I = top[-2];
const int J = top[-3];
const int K = top[-4];
const int L = top[-5];
*(uint32_t*)(dst + 0 * BPS) = 0x01010101U * AVG3(X, I, J);
*(uint32_t*)(dst + 1 * BPS) = 0x01010101U * AVG3(I, J, K);
*(uint32_t*)(dst + 2 * BPS) = 0x01010101U * AVG3(J, K, L);
*(uint32_t*)(dst + 3 * BPS) = 0x01010101U * AVG3(K, L, L);
}
static WEBP_INLINE void DC4(uint8_t* dst, const uint8_t* top) {
uint32_t dc = 4;
int i;
for (i = 0; i < 4; ++i) dc += top[i] + top[-5 + i];
Fill(dst, dc >> 3, 4);
}
static WEBP_INLINE void LD4(uint8_t* dst, const uint8_t* top) { // Down-Left
const __m128i one = _mm_set1_epi8(1);
const __m128i ABCDEFGH = _mm_loadl_epi64((const __m128i*)top);
const __m128i BCDEFGH0 = _mm_srli_si128(ABCDEFGH, 1);
const __m128i CDEFGH00 = _mm_srli_si128(ABCDEFGH, 2);
const __m128i CDEFGHH0 = _mm_insert_epi16(CDEFGH00, top[7], 3);
const __m128i avg1 = _mm_avg_epu8(ABCDEFGH, CDEFGHH0);
const __m128i lsb = _mm_and_si128(_mm_xor_si128(ABCDEFGH, CDEFGHH0), one);
const __m128i avg2 = _mm_subs_epu8(avg1, lsb);
const __m128i abcdefg = _mm_avg_epu8(avg2, BCDEFGH0);
*(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32( abcdefg );
*(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 1));
*(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 2));
*(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 3));
}
static WEBP_INLINE void VR4(uint8_t* dst,
const uint8_t* top) { // Vertical-Right
const __m128i one = _mm_set1_epi8(1);
const int I = top[-2];
const int J = top[-3];
const int K = top[-4];
const int X = top[-1];
const __m128i XABCD = _mm_loadl_epi64((const __m128i*)(top - 1));
const __m128i ABCD0 = _mm_srli_si128(XABCD, 1);
const __m128i abcd = _mm_avg_epu8(XABCD, ABCD0);
const __m128i _XABCD = _mm_slli_si128(XABCD, 1);
const __m128i IXABCD = _mm_insert_epi16(_XABCD, I | (X << 8), 0);
const __m128i avg1 = _mm_avg_epu8(IXABCD, ABCD0);
const __m128i lsb = _mm_and_si128(_mm_xor_si128(IXABCD, ABCD0), one);
const __m128i avg2 = _mm_subs_epu8(avg1, lsb);
const __m128i efgh = _mm_avg_epu8(avg2, XABCD);
*(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32( abcd );
*(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32( efgh );
*(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_slli_si128(abcd, 1));
*(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32(_mm_slli_si128(efgh, 1));
// these two are hard to implement in SSE2, so we keep the C-version:
DST(0, 2) = AVG3(J, I, X);
DST(0, 3) = AVG3(K, J, I);
}
static WEBP_INLINE void VL4(uint8_t* dst,
const uint8_t* top) { // Vertical-Left
const __m128i one = _mm_set1_epi8(1);
const __m128i ABCDEFGH = _mm_loadl_epi64((const __m128i*)top);
const __m128i BCDEFGH_ = _mm_srli_si128(ABCDEFGH, 1);
const __m128i CDEFGH__ = _mm_srli_si128(ABCDEFGH, 2);
const __m128i avg1 = _mm_avg_epu8(ABCDEFGH, BCDEFGH_);
const __m128i avg2 = _mm_avg_epu8(CDEFGH__, BCDEFGH_);
const __m128i avg3 = _mm_avg_epu8(avg1, avg2);
const __m128i lsb1 = _mm_and_si128(_mm_xor_si128(avg1, avg2), one);
const __m128i ab = _mm_xor_si128(ABCDEFGH, BCDEFGH_);
const __m128i bc = _mm_xor_si128(CDEFGH__, BCDEFGH_);
const __m128i abbc = _mm_or_si128(ab, bc);
const __m128i lsb2 = _mm_and_si128(abbc, lsb1);
const __m128i avg4 = _mm_subs_epu8(avg3, lsb2);
const uint32_t extra_out = _mm_cvtsi128_si32(_mm_srli_si128(avg4, 4));
*(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32( avg1 );
*(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32( avg4 );
*(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(avg1, 1));
*(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(avg4, 1));
// these two are hard to get and irregular
DST(3, 2) = (extra_out >> 0) & 0xff;
DST(3, 3) = (extra_out >> 8) & 0xff;
}
static WEBP_INLINE void RD4(uint8_t* dst, const uint8_t* top) { // Down-right
const __m128i one = _mm_set1_epi8(1);
const __m128i LKJIXABC = _mm_loadl_epi64((const __m128i*)(top - 5));
const __m128i LKJIXABCD = _mm_insert_epi16(LKJIXABC, top[3], 4);
const __m128i KJIXABCD_ = _mm_srli_si128(LKJIXABCD, 1);
const __m128i JIXABCD__ = _mm_srli_si128(LKJIXABCD, 2);
const __m128i avg1 = _mm_avg_epu8(JIXABCD__, LKJIXABCD);
const __m128i lsb = _mm_and_si128(_mm_xor_si128(JIXABCD__, LKJIXABCD), one);
const __m128i avg2 = _mm_subs_epu8(avg1, lsb);
const __m128i abcdefg = _mm_avg_epu8(avg2, KJIXABCD_);
*(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32( abcdefg );
*(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 1));
*(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 2));
*(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 3));
}
static WEBP_INLINE void HU4(uint8_t* dst, const uint8_t* top) {
const int I = top[-2];
const int J = top[-3];
const int K = top[-4];
const int L = top[-5];
DST(0, 0) = AVG2(I, J);
DST(2, 0) = DST(0, 1) = AVG2(J, K);
DST(2, 1) = DST(0, 2) = AVG2(K, L);
DST(1, 0) = AVG3(I, J, K);
DST(3, 0) = DST(1, 1) = AVG3(J, K, L);
DST(3, 1) = DST(1, 2) = AVG3(K, L, L);
DST(3, 2) = DST(2, 2) =
DST(0, 3) = DST(1, 3) = DST(2, 3) = DST(3, 3) = L;
}
static WEBP_INLINE void HD4(uint8_t* dst, const uint8_t* top) {
const int X = top[-1];
const int I = top[-2];
const int J = top[-3];
const int K = top[-4];
const int L = top[-5];
const int A = top[0];
const int B = top[1];
const int C = top[2];
DST(0, 0) = DST(2, 1) = AVG2(I, X);
DST(0, 1) = DST(2, 2) = AVG2(J, I);
DST(0, 2) = DST(2, 3) = AVG2(K, J);
DST(0, 3) = AVG2(L, K);
DST(3, 0) = AVG3(A, B, C);
DST(2, 0) = AVG3(X, A, B);
DST(1, 0) = DST(3, 1) = AVG3(I, X, A);
DST(1, 1) = DST(3, 2) = AVG3(J, I, X);
DST(1, 2) = DST(3, 3) = AVG3(K, J, I);
DST(1, 3) = AVG3(L, K, J);
}
static WEBP_INLINE void TM4(uint8_t* dst, const uint8_t* top) {
const __m128i zero = _mm_setzero_si128();
const __m128i top_values = _mm_cvtsi32_si128(*(const int*)top);
const __m128i top_base = _mm_unpacklo_epi8(top_values, zero);
int y;
for (y = 0; y < 4; ++y, dst += BPS) {
const int val = top[-2 - y] - top[-1];
const __m128i base = _mm_set1_epi16(val);
const __m128i out = _mm_packus_epi16(_mm_add_epi16(base, top_base), zero);
*(int*)dst = _mm_cvtsi128_si32(out);
}
}
#undef DST
#undef AVG3
#undef AVG2
//------------------------------------------------------------------------------
// luma 4x4 prediction
// Left samples are top[-5 .. -2], top_left is top[-1], top are
// located at top[0..3], and top right is top[4..7]
static void Intra4Preds(uint8_t* dst, const uint8_t* top) {
DC4(I4DC4 + dst, top);
TM4(I4TM4 + dst, top);
VE4(I4VE4 + dst, top);
HE4(I4HE4 + dst, top);
RD4(I4RD4 + dst, top);
VR4(I4VR4 + dst, top);
LD4(I4LD4 + dst, top);
VL4(I4VL4 + dst, top);
HD4(I4HD4 + dst, top);
HU4(I4HU4 + dst, top);
}
//------------------------------------------------------------------------------
// Chroma 8x8 prediction (paragraph 12.2)
static void IntraChromaPreds(uint8_t* dst, const uint8_t* left,
const uint8_t* top) {
// U block
DC8uvMode(C8DC8 + dst, left, top);
VerticalPred(C8VE8 + dst, top, 8);
HorizontalPred(C8HE8 + dst, left, 8);
TrueMotion(C8TM8 + dst, left, top, 8);
// V block
dst += 8;
if (top != NULL) top += 8;
if (left != NULL) left += 16;
DC8uvMode(C8DC8 + dst, left, top);
VerticalPred(C8VE8 + dst, top, 8);
HorizontalPred(C8HE8 + dst, left, 8);
TrueMotion(C8TM8 + dst, left, top, 8);
}
//------------------------------------------------------------------------------
// luma 16x16 prediction (paragraph 12.3)
static void Intra16Preds(uint8_t* dst,
const uint8_t* left, const uint8_t* top) {
DC16Mode(I16DC16 + dst, left, top);
VerticalPred(I16VE16 + dst, top, 16);
HorizontalPred(I16HE16 + dst, left, 16);
TrueMotion(I16TM16 + dst, left, top, 16);
}
//------------------------------------------------------------------------------
// Metric
static WEBP_INLINE void SubtractAndAccumulate(const __m128i a, const __m128i b,
__m128i* const sum) {
// take abs(a-b) in 8b
const __m128i a_b = _mm_subs_epu8(a, b);
const __m128i b_a = _mm_subs_epu8(b, a);
const __m128i abs_a_b = _mm_or_si128(a_b, b_a);
// zero-extend to 16b
const __m128i zero = _mm_setzero_si128();
const __m128i C0 = _mm_unpacklo_epi8(abs_a_b, zero);
const __m128i C1 = _mm_unpackhi_epi8(abs_a_b, zero);
// multiply with self
const __m128i sum1 = _mm_madd_epi16(C0, C0);
const __m128i sum2 = _mm_madd_epi16(C1, C1);
*sum = _mm_add_epi32(sum1, sum2);
}
static WEBP_INLINE int SSE_16xN(const uint8_t* a, const uint8_t* b,
int num_pairs) {
__m128i sum = _mm_setzero_si128();
int32_t tmp[4];
int i;
for (i = 0; i < num_pairs; ++i) {
const __m128i a0 = _mm_loadu_si128((const __m128i*)&a[BPS * 0]);
const __m128i b0 = _mm_loadu_si128((const __m128i*)&b[BPS * 0]);
const __m128i a1 = _mm_loadu_si128((const __m128i*)&a[BPS * 1]);
const __m128i b1 = _mm_loadu_si128((const __m128i*)&b[BPS * 1]);
__m128i sum1, sum2;
SubtractAndAccumulate(a0, b0, &sum1);
SubtractAndAccumulate(a1, b1, &sum2);
sum = _mm_add_epi32(sum, _mm_add_epi32(sum1, sum2));
a += 2 * BPS;
b += 2 * BPS;
}
_mm_storeu_si128((__m128i*)tmp, sum);
return (tmp[3] + tmp[2] + tmp[1] + tmp[0]);
}
static int SSE16x16(const uint8_t* a, const uint8_t* b) {
return SSE_16xN(a, b, 8);
}
static int SSE16x8(const uint8_t* a, const uint8_t* b) {
return SSE_16xN(a, b, 4);
}
#define LOAD_8x16b(ptr) \
_mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i*)(ptr)), zero)
static int SSE8x8(const uint8_t* a, const uint8_t* b) {
const __m128i zero = _mm_setzero_si128();
int num_pairs = 4;
__m128i sum = zero;
int32_t tmp[4];
while (num_pairs-- > 0) {
const __m128i a0 = LOAD_8x16b(&a[BPS * 0]);
const __m128i a1 = LOAD_8x16b(&a[BPS * 1]);
const __m128i b0 = LOAD_8x16b(&b[BPS * 0]);
const __m128i b1 = LOAD_8x16b(&b[BPS * 1]);
// subtract
const __m128i c0 = _mm_subs_epi16(a0, b0);
const __m128i c1 = _mm_subs_epi16(a1, b1);
// multiply/accumulate with self
const __m128i d0 = _mm_madd_epi16(c0, c0);
const __m128i d1 = _mm_madd_epi16(c1, c1);
// collect
const __m128i sum01 = _mm_add_epi32(d0, d1);
sum = _mm_add_epi32(sum, sum01);
a += 2 * BPS;
b += 2 * BPS;
}
_mm_storeu_si128((__m128i*)tmp, sum);
return (tmp[3] + tmp[2] + tmp[1] + tmp[0]);
}
#undef LOAD_8x16b
static int SSE4x4(const uint8_t* a, const uint8_t* b) {
const __m128i zero = _mm_setzero_si128();
// Load values. Note that we read 8 pixels instead of 4,
// but the a/b buffers are over-allocated to that effect.
const __m128i a0 = _mm_loadl_epi64((const __m128i*)&a[BPS * 0]);
const __m128i a1 = _mm_loadl_epi64((const __m128i*)&a[BPS * 1]);
const __m128i a2 = _mm_loadl_epi64((const __m128i*)&a[BPS * 2]);
const __m128i a3 = _mm_loadl_epi64((const __m128i*)&a[BPS * 3]);
const __m128i b0 = _mm_loadl_epi64((const __m128i*)&b[BPS * 0]);
const __m128i b1 = _mm_loadl_epi64((const __m128i*)&b[BPS * 1]);
const __m128i b2 = _mm_loadl_epi64((const __m128i*)&b[BPS * 2]);
const __m128i b3 = _mm_loadl_epi64((const __m128i*)&b[BPS * 3]);
// Combine pair of lines.
const __m128i a01 = _mm_unpacklo_epi32(a0, a1);
const __m128i a23 = _mm_unpacklo_epi32(a2, a3);
const __m128i b01 = _mm_unpacklo_epi32(b0, b1);
const __m128i b23 = _mm_unpacklo_epi32(b2, b3);
// Convert to 16b.
const __m128i a01s = _mm_unpacklo_epi8(a01, zero);
const __m128i a23s = _mm_unpacklo_epi8(a23, zero);
const __m128i b01s = _mm_unpacklo_epi8(b01, zero);
const __m128i b23s = _mm_unpacklo_epi8(b23, zero);
// subtract, square and accumulate
const __m128i d0 = _mm_subs_epi16(a01s, b01s);
const __m128i d1 = _mm_subs_epi16(a23s, b23s);
const __m128i e0 = _mm_madd_epi16(d0, d0);
const __m128i e1 = _mm_madd_epi16(d1, d1);
const __m128i sum = _mm_add_epi32(e0, e1);
int32_t tmp[4];
_mm_storeu_si128((__m128i*)tmp, sum);
return (tmp[3] + tmp[2] + tmp[1] + tmp[0]);
}
//------------------------------------------------------------------------------
// Texture distortion
//
// We try to match the spectral content (weighted) between source and
// reconstructed samples.
// Hadamard transform
// Returns the difference between the weighted sum of the absolute value of
// transformed coefficients.
static int TTransform(const uint8_t* inA, const uint8_t* inB,
const uint16_t* const w) {
int32_t sum[4];
__m128i tmp_0, tmp_1, tmp_2, tmp_3;
const __m128i zero = _mm_setzero_si128();
// Load, combine and transpose inputs.
{
const __m128i inA_0 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 0]);
const __m128i inA_1 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 1]);
const __m128i inA_2 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 2]);
const __m128i inA_3 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 3]);
const __m128i inB_0 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 0]);
const __m128i inB_1 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 1]);
const __m128i inB_2 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 2]);
const __m128i inB_3 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 3]);
// Combine inA and inB (we'll do two transforms in parallel).
const __m128i inAB_0 = _mm_unpacklo_epi8(inA_0, inB_0);
const __m128i inAB_1 = _mm_unpacklo_epi8(inA_1, inB_1);
const __m128i inAB_2 = _mm_unpacklo_epi8(inA_2, inB_2);
const __m128i inAB_3 = _mm_unpacklo_epi8(inA_3, inB_3);
// a00 b00 a01 b01 a02 b03 a03 b03 0 0 0 0 0 0 0 0
// a10 b10 a11 b11 a12 b12 a13 b13 0 0 0 0 0 0 0 0
// a20 b20 a21 b21 a22 b22 a23 b23 0 0 0 0 0 0 0 0
// a30 b30 a31 b31 a32 b32 a33 b33 0 0 0 0 0 0 0 0
// Transpose the two 4x4, discarding the filling zeroes.
const __m128i transpose0_0 = _mm_unpacklo_epi8(inAB_0, inAB_2);
const __m128i transpose0_1 = _mm_unpacklo_epi8(inAB_1, inAB_3);
// a00 a20 b00 b20 a01 a21 b01 b21 a02 a22 b02 b22 a03 a23 b03 b23
// a10 a30 b10 b30 a11 a31 b11 b31 a12 a32 b12 b32 a13 a33 b13 b33
const __m128i transpose1_0 = _mm_unpacklo_epi8(transpose0_0, transpose0_1);
const __m128i transpose1_1 = _mm_unpackhi_epi8(transpose0_0, transpose0_1);
// a00 a10 a20 a30 b00 b10 b20 b30 a01 a11 a21 a31 b01 b11 b21 b31
// a02 a12 a22 a32 b02 b12 b22 b32 a03 a13 a23 a33 b03 b13 b23 b33
// Convert to 16b.
tmp_0 = _mm_unpacklo_epi8(transpose1_0, zero);
tmp_1 = _mm_unpackhi_epi8(transpose1_0, zero);
tmp_2 = _mm_unpacklo_epi8(transpose1_1, zero);
tmp_3 = _mm_unpackhi_epi8(transpose1_1, zero);
// a00 a10 a20 a30 b00 b10 b20 b30
// a01 a11 a21 a31 b01 b11 b21 b31
// a02 a12 a22 a32 b02 b12 b22 b32
// a03 a13 a23 a33 b03 b13 b23 b33
}
// Horizontal pass and subsequent transpose.
{
// Calculate a and b (two 4x4 at once).
const __m128i a0 = _mm_add_epi16(tmp_0, tmp_2);
const __m128i a1 = _mm_add_epi16(tmp_1, tmp_3);
const __m128i a2 = _mm_sub_epi16(tmp_1, tmp_3);
const __m128i a3 = _mm_sub_epi16(tmp_0, tmp_2);
const __m128i b0 = _mm_add_epi16(a0, a1);
const __m128i b1 = _mm_add_epi16(a3, a2);
const __m128i b2 = _mm_sub_epi16(a3, a2);
const __m128i b3 = _mm_sub_epi16(a0, a1);
// a00 a01 a02 a03 b00 b01 b02 b03
// a10 a11 a12 a13 b10 b11 b12 b13
// a20 a21 a22 a23 b20 b21 b22 b23
// a30 a31 a32 a33 b30 b31 b32 b33
// Transpose the two 4x4.
const __m128i transpose0_0 = _mm_unpacklo_epi16(b0, b1);
const __m128i transpose0_1 = _mm_unpacklo_epi16(b2, b3);
const __m128i transpose0_2 = _mm_unpackhi_epi16(b0, b1);
const __m128i transpose0_3 = _mm_unpackhi_epi16(b2, b3);
// a00 a10 a01 a11 a02 a12 a03 a13
// a20 a30 a21 a31 a22 a32 a23 a33
// b00 b10 b01 b11 b02 b12 b03 b13
// b20 b30 b21 b31 b22 b32 b23 b33
const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1);
const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3);
const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1);
const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3);
// a00 a10 a20 a30 a01 a11 a21 a31
// b00 b10 b20 b30 b01 b11 b21 b31
// a02 a12 a22 a32 a03 a13 a23 a33
// b02 b12 a22 b32 b03 b13 b23 b33
tmp_0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1);
tmp_1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1);
tmp_2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3);
tmp_3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3);
// a00 a10 a20 a30 b00 b10 b20 b30
// a01 a11 a21 a31 b01 b11 b21 b31
// a02 a12 a22 a32 b02 b12 b22 b32
// a03 a13 a23 a33 b03 b13 b23 b33
}
// Vertical pass and difference of weighted sums.
{
// Load all inputs.
// TODO(cduvivier): Make variable declarations and allocations aligned so
// we can use _mm_load_si128 instead of _mm_loadu_si128.
const __m128i w_0 = _mm_loadu_si128((const __m128i*)&w[0]);
const __m128i w_8 = _mm_loadu_si128((const __m128i*)&w[8]);
// Calculate a and b (two 4x4 at once).
const __m128i a0 = _mm_add_epi16(tmp_0, tmp_2);
const __m128i a1 = _mm_add_epi16(tmp_1, tmp_3);
const __m128i a2 = _mm_sub_epi16(tmp_1, tmp_3);
const __m128i a3 = _mm_sub_epi16(tmp_0, tmp_2);
const __m128i b0 = _mm_add_epi16(a0, a1);
const __m128i b1 = _mm_add_epi16(a3, a2);
const __m128i b2 = _mm_sub_epi16(a3, a2);
const __m128i b3 = _mm_sub_epi16(a0, a1);
// Separate the transforms of inA and inB.
__m128i A_b0 = _mm_unpacklo_epi64(b0, b1);
__m128i A_b2 = _mm_unpacklo_epi64(b2, b3);
__m128i B_b0 = _mm_unpackhi_epi64(b0, b1);
__m128i B_b2 = _mm_unpackhi_epi64(b2, b3);
{
const __m128i d0 = _mm_sub_epi16(zero, A_b0);
const __m128i d1 = _mm_sub_epi16(zero, A_b2);
const __m128i d2 = _mm_sub_epi16(zero, B_b0);
const __m128i d3 = _mm_sub_epi16(zero, B_b2);
A_b0 = _mm_max_epi16(A_b0, d0); // abs(v), 16b
A_b2 = _mm_max_epi16(A_b2, d1);
B_b0 = _mm_max_epi16(B_b0, d2);
B_b2 = _mm_max_epi16(B_b2, d3);
}
// weighted sums
A_b0 = _mm_madd_epi16(A_b0, w_0);
A_b2 = _mm_madd_epi16(A_b2, w_8);
B_b0 = _mm_madd_epi16(B_b0, w_0);
B_b2 = _mm_madd_epi16(B_b2, w_8);
A_b0 = _mm_add_epi32(A_b0, A_b2);
B_b0 = _mm_add_epi32(B_b0, B_b2);
// difference of weighted sums
A_b0 = _mm_sub_epi32(A_b0, B_b0);
_mm_storeu_si128((__m128i*)&sum[0], A_b0);
}
return sum[0] + sum[1] + sum[2] + sum[3];
}
static int Disto4x4(const uint8_t* const a, const uint8_t* const b,
const uint16_t* const w) {
const int diff_sum = TTransform(a, b, w);
return abs(diff_sum) >> 5;
}
static int Disto16x16(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(a + x + y, b + x + y, w);
}
}
return D;
}
//------------------------------------------------------------------------------
// Quantization
//
static WEBP_INLINE int DoQuantizeBlock(int16_t in[16], int16_t out[16],
const uint16_t* const sharpen,
const VP8Matrix* const mtx) {
const __m128i max_coeff_2047 = _mm_set1_epi16(MAX_LEVEL);
const __m128i zero = _mm_setzero_si128();
__m128i coeff0, coeff8;
__m128i out0, out8;
__m128i packed_out;
// Load all inputs.
// TODO(cduvivier): Make variable declarations and allocations aligned so that
// we can use _mm_load_si128 instead of _mm_loadu_si128.
__m128i in0 = _mm_loadu_si128((__m128i*)&in[0]);
__m128i in8 = _mm_loadu_si128((__m128i*)&in[8]);
const __m128i iq0 = _mm_loadu_si128((const __m128i*)&mtx->iq_[0]);
const __m128i iq8 = _mm_loadu_si128((const __m128i*)&mtx->iq_[8]);
const __m128i q0 = _mm_loadu_si128((const __m128i*)&mtx->q_[0]);
const __m128i q8 = _mm_loadu_si128((const __m128i*)&mtx->q_[8]);
// extract sign(in) (0x0000 if positive, 0xffff if negative)
const __m128i sign0 = _mm_cmpgt_epi16(zero, in0);
const __m128i sign8 = _mm_cmpgt_epi16(zero, in8);
// coeff = abs(in) = (in ^ sign) - sign
coeff0 = _mm_xor_si128(in0, sign0);
coeff8 = _mm_xor_si128(in8, sign8);
coeff0 = _mm_sub_epi16(coeff0, sign0);
coeff8 = _mm_sub_epi16(coeff8, sign8);
// coeff = abs(in) + sharpen
if (sharpen != NULL) {
const __m128i sharpen0 = _mm_loadu_si128((const __m128i*)&sharpen[0]);
const __m128i sharpen8 = _mm_loadu_si128((const __m128i*)&sharpen[8]);
coeff0 = _mm_add_epi16(coeff0, sharpen0);
coeff8 = _mm_add_epi16(coeff8, sharpen8);
}
// out = (coeff * iQ + B) >> QFIX
{
// doing calculations with 32b precision (QFIX=17)
// out = (coeff * iQ)
const __m128i coeff_iQ0H = _mm_mulhi_epu16(coeff0, iq0);
const __m128i coeff_iQ0L = _mm_mullo_epi16(coeff0, iq0);
const __m128i coeff_iQ8H = _mm_mulhi_epu16(coeff8, iq8);
const __m128i coeff_iQ8L = _mm_mullo_epi16(coeff8, iq8);
__m128i out_00 = _mm_unpacklo_epi16(coeff_iQ0L, coeff_iQ0H);
__m128i out_04 = _mm_unpackhi_epi16(coeff_iQ0L, coeff_iQ0H);
__m128i out_08 = _mm_unpacklo_epi16(coeff_iQ8L, coeff_iQ8H);
__m128i out_12 = _mm_unpackhi_epi16(coeff_iQ8L, coeff_iQ8H);
// out = (coeff * iQ + B)
const __m128i bias_00 = _mm_loadu_si128((const __m128i*)&mtx->bias_[0]);
const __m128i bias_04 = _mm_loadu_si128((const __m128i*)&mtx->bias_[4]);
const __m128i bias_08 = _mm_loadu_si128((const __m128i*)&mtx->bias_[8]);
const __m128i bias_12 = _mm_loadu_si128((const __m128i*)&mtx->bias_[12]);
out_00 = _mm_add_epi32(out_00, bias_00);
out_04 = _mm_add_epi32(out_04, bias_04);
out_08 = _mm_add_epi32(out_08, bias_08);
out_12 = _mm_add_epi32(out_12, bias_12);
// out = QUANTDIV(coeff, iQ, B, QFIX)
out_00 = _mm_srai_epi32(out_00, QFIX);
out_04 = _mm_srai_epi32(out_04, QFIX);
out_08 = _mm_srai_epi32(out_08, QFIX);
out_12 = _mm_srai_epi32(out_12, QFIX);
// pack result as 16b
out0 = _mm_packs_epi32(out_00, out_04);
out8 = _mm_packs_epi32(out_08, out_12);
// if (coeff > 2047) coeff = 2047
out0 = _mm_min_epi16(out0, max_coeff_2047);
out8 = _mm_min_epi16(out8, max_coeff_2047);
}
// get sign back (if (sign[j]) out_n = -out_n)
out0 = _mm_xor_si128(out0, sign0);
out8 = _mm_xor_si128(out8, sign8);
out0 = _mm_sub_epi16(out0, sign0);
out8 = _mm_sub_epi16(out8, sign8);
// in = out * Q
in0 = _mm_mullo_epi16(out0, q0);
in8 = _mm_mullo_epi16(out8, q8);
_mm_storeu_si128((__m128i*)&in[0], in0);
_mm_storeu_si128((__m128i*)&in[8], in8);
// zigzag the output before storing it.
//
// The zigzag pattern can almost be reproduced with a small sequence of
// shuffles. After it, we only need to swap the 7th (ending up in third
// position instead of twelfth) and 8th values.
{
__m128i outZ0, outZ8;
outZ0 = _mm_shufflehi_epi16(out0, _MM_SHUFFLE(2, 1, 3, 0));
outZ0 = _mm_shuffle_epi32 (outZ0, _MM_SHUFFLE(3, 1, 2, 0));
outZ0 = _mm_shufflehi_epi16(outZ0, _MM_SHUFFLE(3, 1, 0, 2));
outZ8 = _mm_shufflelo_epi16(out8, _MM_SHUFFLE(3, 0, 2, 1));
outZ8 = _mm_shuffle_epi32 (outZ8, _MM_SHUFFLE(3, 1, 2, 0));
outZ8 = _mm_shufflelo_epi16(outZ8, _MM_SHUFFLE(1, 3, 2, 0));
_mm_storeu_si128((__m128i*)&out[0], outZ0);
_mm_storeu_si128((__m128i*)&out[8], outZ8);
packed_out = _mm_packs_epi16(outZ0, outZ8);
}
{
const int16_t outZ_12 = out[12];
const int16_t outZ_3 = out[3];
out[3] = outZ_12;
out[12] = outZ_3;
}
// detect if all 'out' values are zeroes or not
return (_mm_movemask_epi8(_mm_cmpeq_epi8(packed_out, zero)) != 0xffff);
}
static int QuantizeBlock(int16_t in[16], int16_t out[16],
const VP8Matrix* const mtx) {
return DoQuantizeBlock(in, out, &mtx->sharpen_[0], mtx);
}
static int QuantizeBlockWHT(int16_t in[16], int16_t out[16],
const VP8Matrix* const mtx) {
return DoQuantizeBlock(in, out, NULL, mtx);
}
static int Quantize2Blocks(int16_t in[32], int16_t out[32],
const VP8Matrix* const mtx) {
int nz;
const uint16_t* const sharpen = &mtx->sharpen_[0];
nz = DoQuantizeBlock(in + 0 * 16, out + 0 * 16, sharpen, mtx) << 0;
nz |= DoQuantizeBlock(in + 1 * 16, out + 1 * 16, sharpen, mtx) << 1;
return nz;
}
//------------------------------------------------------------------------------
// Entry point
extern void VP8EncDspInitSSE2(void);
WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitSSE2(void) {
VP8CollectHistogram = CollectHistogram;
VP8EncPredLuma16 = Intra16Preds;
VP8EncPredChroma8 = IntraChromaPreds;
VP8EncPredLuma4 = Intra4Preds;
VP8EncQuantizeBlock = QuantizeBlock;
VP8EncQuantize2Blocks = Quantize2Blocks;
VP8EncQuantizeBlockWHT = QuantizeBlockWHT;
VP8ITransform = ITransform;
VP8FTransform = FTransform;
VP8FTransform2 = FTransform2;
VP8FTransformWHT = FTransformWHT;
VP8SSE16x16 = SSE16x16;
VP8SSE16x8 = SSE16x8;
VP8SSE8x8 = SSE8x8;
VP8SSE4x4 = SSE4x4;
VP8TDisto4x4 = Disto4x4;
VP8TDisto16x16 = Disto16x16;
}
#else // !WEBP_USE_SSE2
WEBP_DSP_INIT_STUB(VP8EncDspInitSSE2)
#endif // WEBP_USE_SSE2
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