Commit e731b2ba authored by Yunqing Wang's avatar Yunqing Wang Committed by Gerrit Code Review

Merge "Improve vp9_idct4x4_1_add_sse2"

parents 814112d0 908a992d
......@@ -15,6 +15,16 @@
#include "vp9/common/vp9_common.h"
#include "vp9/common/vp9_idct.h"
#define RECON_AND_STORE4X4(dest, in_x) \
{ \
__m128i d0 = _mm_cvtsi32_si128(*(const int *)(dest)); \
d0 = _mm_unpacklo_epi8(d0, zero); \
d0 = _mm_add_epi16(in_x, d0); \
d0 = _mm_packus_epi16(d0, d0); \
*(int *)dest = _mm_cvtsi128_si32(d0); \
dest += stride; \
}
void vp9_idct4x4_16_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
const __m128i zero = _mm_setzero_si128();
const __m128i eight = _mm_set1_epi16(8);
......@@ -26,21 +36,19 @@ void vp9_idct4x4_16_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
__m128i input0, input1, input2, input3;
// Rows
input0 = _mm_loadl_epi64((const __m128i *)input);
input1 = _mm_loadl_epi64((const __m128i *)(input + 4));
input2 = _mm_loadl_epi64((const __m128i *)(input + 8));
input3 = _mm_loadl_epi64((const __m128i *)(input + 12));
input0 = _mm_load_si128((const __m128i *)input);
input2 = _mm_load_si128((const __m128i *)(input + 8));
// Construct i3, i1, i3, i1, i2, i0, i2, i0
input0 = _mm_shufflelo_epi16(input0, 0xd8);
input1 = _mm_shufflelo_epi16(input1, 0xd8);
input0 = _mm_shufflehi_epi16(input0, 0xd8);
input2 = _mm_shufflelo_epi16(input2, 0xd8);
input3 = _mm_shufflelo_epi16(input3, 0xd8);
input2 = _mm_shufflehi_epi16(input2, 0xd8);
input1 = _mm_unpackhi_epi32(input0, input0);
input0 = _mm_unpacklo_epi32(input0, input0);
input1 = _mm_unpacklo_epi32(input1, input1);
input3 = _mm_unpackhi_epi32(input2, input2);
input2 = _mm_unpacklo_epi32(input2, input2);
input3 = _mm_unpacklo_epi32(input3, input3);
// Stage 1
input0 = _mm_madd_epi16(input0, cst);
......@@ -59,16 +67,14 @@ void vp9_idct4x4_16_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
input3 = _mm_srai_epi32(input3, DCT_CONST_BITS);
// Stage 2
input0 = _mm_packs_epi32(input0, zero);
input1 = _mm_packs_epi32(input1, zero);
input2 = _mm_packs_epi32(input2, zero);
input3 = _mm_packs_epi32(input3, zero);
input0 = _mm_packs_epi32(input0, input1);
input1 = _mm_packs_epi32(input2, input3);
// Transpose
input1 = _mm_unpacklo_epi16(input0, input1);
input3 = _mm_unpacklo_epi16(input2, input3);
input0 = _mm_unpacklo_epi32(input1, input3);
input1 = _mm_unpackhi_epi32(input1, input3);
input2 = _mm_unpacklo_epi16(input0, input1);
input3 = _mm_unpackhi_epi16(input0, input1);
input0 = _mm_unpacklo_epi32(input2, input3);
input1 = _mm_unpackhi_epi32(input2, input3);
// Switch column2, column 3, and then, we got:
// input2: column1, column 0; input3: column2, column 3.
......@@ -78,14 +84,9 @@ void vp9_idct4x4_16_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
// Columns
// Construct i3, i1, i3, i1, i2, i0, i2, i0
input0 = _mm_shufflelo_epi16(input2, 0xd8);
input1 = _mm_shufflehi_epi16(input2, 0xd8);
input2 = _mm_shufflehi_epi16(input3, 0xd8);
input3 = _mm_shufflelo_epi16(input3, 0xd8);
input0 = _mm_unpacklo_epi32(input0, input0);
input1 = _mm_unpackhi_epi32(input1, input1);
input2 = _mm_unpackhi_epi32(input2, input2);
input0 = _mm_unpacklo_epi32(input2, input2);
input1 = _mm_unpackhi_epi32(input2, input2);
input2 = _mm_unpackhi_epi32(input3, input3);
input3 = _mm_unpacklo_epi32(input3, input3);
// Stage 1
......@@ -105,16 +106,14 @@ void vp9_idct4x4_16_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
input3 = _mm_srai_epi32(input3, DCT_CONST_BITS);
// Stage 2
input0 = _mm_packs_epi32(input0, zero);
input1 = _mm_packs_epi32(input1, zero);
input2 = _mm_packs_epi32(input2, zero);
input3 = _mm_packs_epi32(input3, zero);
input0 = _mm_packs_epi32(input0, input2);
input1 = _mm_packs_epi32(input1, input3);
// Transpose
input1 = _mm_unpacklo_epi16(input0, input1);
input3 = _mm_unpacklo_epi16(input2, input3);
input0 = _mm_unpacklo_epi32(input1, input3);
input1 = _mm_unpackhi_epi32(input1, input3);
input2 = _mm_unpacklo_epi16(input0, input1);
input3 = _mm_unpackhi_epi16(input0, input1);
input0 = _mm_unpacklo_epi32(input2, input3);
input1 = _mm_unpackhi_epi32(input2, input3);
// Switch column2, column 3, and then, we got:
// input2: column1, column 0; input3: column2, column 3.
......@@ -129,23 +128,31 @@ void vp9_idct4x4_16_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
input2 = _mm_srai_epi16(input2, 4);
input3 = _mm_srai_epi16(input3, 4);
#define RECON_AND_STORE4X4(dest, in_x) \
{ \
__m128i d0 = _mm_cvtsi32_si128(*(const int *)(dest)); \
d0 = _mm_unpacklo_epi8(d0, zero); \
d0 = _mm_add_epi16(in_x, d0); \
d0 = _mm_packus_epi16(d0, d0); \
*(int *)dest = _mm_cvtsi128_si32(d0); \
dest += stride; \
// Reconstruction and Store
{
__m128i d0 = _mm_cvtsi32_si128(*(const int *)(dest));
__m128i d2 = _mm_cvtsi32_si128(*(const int *)(dest + stride * 2));
d0 = _mm_unpacklo_epi32(d0,
_mm_cvtsi32_si128(*(const int *) (dest + stride)));
d2 = _mm_unpacklo_epi32(_mm_cvtsi32_si128(
*(const int *) (dest + stride * 3)), d2);
d0 = _mm_unpacklo_epi8(d0, zero);
d2 = _mm_unpacklo_epi8(d2, zero);
d0 = _mm_add_epi16(d0, input2);
d2 = _mm_add_epi16(d2, input3);
d0 = _mm_packus_epi16(d0, d2);
// store input0
*(int *)dest = _mm_cvtsi128_si32(d0);
// store input1
d0 = _mm_srli_si128(d0, 4);
*(int *)(dest + stride) = _mm_cvtsi128_si32(d0);
// store input2
d0 = _mm_srli_si128(d0, 4);
*(int *)(dest + stride * 3) = _mm_cvtsi128_si32(d0);
// store input3
d0 = _mm_srli_si128(d0, 4);
*(int *)(dest + stride * 2) = _mm_cvtsi128_si32(d0);
}
input0 = _mm_srli_si128(input2, 8);
input1 = _mm_srli_si128(input3, 8);
RECON_AND_STORE4X4(dest, input2);
RECON_AND_STORE4X4(dest, input0);
RECON_AND_STORE4X4(dest, input1);
RECON_AND_STORE4X4(dest, input3);
}
void vp9_idct4x4_1_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
......
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