6d21cbd20b
This commit enables SSSE3 implementation of the inverse 2D-DCT with only first 10 coefficients non-zero. It reduces the runtime of SSE2 version from 745 cycles to 538 cycles, i.e., 27% speed-up. Change-Id: I18ba4128859b09c704a6ee361d69a86c09fe8dfe
176 lines
6.9 KiB
C
176 lines
6.9 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <assert.h>
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#include <emmintrin.h> // SSE2
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#include "./vpx_config.h"
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#include "vpx/vpx_integer.h"
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#include "vp9/common/vp9_common.h"
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#include "vp9/common/vp9_idct.h"
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// perform 8x8 transpose
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static INLINE void array_transpose_8x8(__m128i *in, __m128i *res) {
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const __m128i tr0_0 = _mm_unpacklo_epi16(in[0], in[1]);
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const __m128i tr0_1 = _mm_unpacklo_epi16(in[2], in[3]);
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const __m128i tr0_2 = _mm_unpackhi_epi16(in[0], in[1]);
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const __m128i tr0_3 = _mm_unpackhi_epi16(in[2], in[3]);
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const __m128i tr0_4 = _mm_unpacklo_epi16(in[4], in[5]);
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const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);
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const __m128i tr0_6 = _mm_unpackhi_epi16(in[4], in[5]);
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const __m128i tr0_7 = _mm_unpackhi_epi16(in[6], in[7]);
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const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
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const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_4, tr0_5);
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const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
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const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_4, tr0_5);
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const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_2, tr0_3);
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const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);
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const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_2, tr0_3);
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const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);
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res[0] = _mm_unpacklo_epi64(tr1_0, tr1_1);
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res[1] = _mm_unpackhi_epi64(tr1_0, tr1_1);
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res[2] = _mm_unpacklo_epi64(tr1_2, tr1_3);
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res[3] = _mm_unpackhi_epi64(tr1_2, tr1_3);
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res[4] = _mm_unpacklo_epi64(tr1_4, tr1_5);
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res[5] = _mm_unpackhi_epi64(tr1_4, tr1_5);
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res[6] = _mm_unpacklo_epi64(tr1_6, tr1_7);
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res[7] = _mm_unpackhi_epi64(tr1_6, tr1_7);
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}
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#define TRANSPOSE_8X4(in0, in1, in2, in3, out0, out1) \
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{ \
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const __m128i tr0_0 = _mm_unpacklo_epi16(in0, in1); \
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const __m128i tr0_1 = _mm_unpacklo_epi16(in2, in3); \
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\
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in0 = _mm_unpacklo_epi32(tr0_0, tr0_1); /* i1 i0 */ \
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in1 = _mm_unpackhi_epi32(tr0_0, tr0_1); /* i3 i2 */ \
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}
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static INLINE void array_transpose_4X8(__m128i *in, __m128i * out) {
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const __m128i tr0_0 = _mm_unpacklo_epi16(in[0], in[1]);
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const __m128i tr0_1 = _mm_unpacklo_epi16(in[2], in[3]);
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const __m128i tr0_4 = _mm_unpacklo_epi16(in[4], in[5]);
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const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);
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const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
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const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
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const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);
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const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);
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out[0] = _mm_unpacklo_epi64(tr1_0, tr1_4);
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out[1] = _mm_unpackhi_epi64(tr1_0, tr1_4);
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out[2] = _mm_unpacklo_epi64(tr1_2, tr1_6);
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out[3] = _mm_unpackhi_epi64(tr1_2, tr1_6);
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}
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static INLINE void array_transpose_16x16(__m128i *res0, __m128i *res1) {
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__m128i tbuf[8];
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array_transpose_8x8(res0, res0);
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array_transpose_8x8(res1, tbuf);
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array_transpose_8x8(res0 + 8, res1);
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array_transpose_8x8(res1 + 8, res1 + 8);
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res0[8] = tbuf[0];
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res0[9] = tbuf[1];
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res0[10] = tbuf[2];
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res0[11] = tbuf[3];
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res0[12] = tbuf[4];
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res0[13] = tbuf[5];
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res0[14] = tbuf[6];
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res0[15] = tbuf[7];
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}
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static INLINE void load_buffer_8x16(const int16_t *input, __m128i *in) {
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in[0] = _mm_load_si128((const __m128i *)(input + 0 * 16));
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in[1] = _mm_load_si128((const __m128i *)(input + 1 * 16));
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in[2] = _mm_load_si128((const __m128i *)(input + 2 * 16));
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in[3] = _mm_load_si128((const __m128i *)(input + 3 * 16));
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in[4] = _mm_load_si128((const __m128i *)(input + 4 * 16));
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in[5] = _mm_load_si128((const __m128i *)(input + 5 * 16));
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in[6] = _mm_load_si128((const __m128i *)(input + 6 * 16));
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in[7] = _mm_load_si128((const __m128i *)(input + 7 * 16));
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in[8] = _mm_load_si128((const __m128i *)(input + 8 * 16));
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in[9] = _mm_load_si128((const __m128i *)(input + 9 * 16));
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in[10] = _mm_load_si128((const __m128i *)(input + 10 * 16));
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in[11] = _mm_load_si128((const __m128i *)(input + 11 * 16));
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in[12] = _mm_load_si128((const __m128i *)(input + 12 * 16));
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in[13] = _mm_load_si128((const __m128i *)(input + 13 * 16));
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in[14] = _mm_load_si128((const __m128i *)(input + 14 * 16));
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in[15] = _mm_load_si128((const __m128i *)(input + 15 * 16));
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}
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#define RECON_AND_STORE(dest, in_x) \
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{ \
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__m128i d0 = _mm_loadl_epi64((__m128i *)(dest)); \
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d0 = _mm_unpacklo_epi8(d0, zero); \
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d0 = _mm_add_epi16(in_x, d0); \
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d0 = _mm_packus_epi16(d0, d0); \
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_mm_storel_epi64((__m128i *)(dest), d0); \
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dest += stride; \
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}
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static INLINE void write_buffer_8x16(uint8_t *dest, __m128i *in, int stride) {
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const __m128i final_rounding = _mm_set1_epi16(1<<5);
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const __m128i zero = _mm_setzero_si128();
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// Final rounding and shift
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in[0] = _mm_adds_epi16(in[0], final_rounding);
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in[1] = _mm_adds_epi16(in[1], final_rounding);
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in[2] = _mm_adds_epi16(in[2], final_rounding);
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in[3] = _mm_adds_epi16(in[3], final_rounding);
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in[4] = _mm_adds_epi16(in[4], final_rounding);
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in[5] = _mm_adds_epi16(in[5], final_rounding);
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in[6] = _mm_adds_epi16(in[6], final_rounding);
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in[7] = _mm_adds_epi16(in[7], final_rounding);
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in[8] = _mm_adds_epi16(in[8], final_rounding);
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in[9] = _mm_adds_epi16(in[9], final_rounding);
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in[10] = _mm_adds_epi16(in[10], final_rounding);
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in[11] = _mm_adds_epi16(in[11], final_rounding);
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in[12] = _mm_adds_epi16(in[12], final_rounding);
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in[13] = _mm_adds_epi16(in[13], final_rounding);
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in[14] = _mm_adds_epi16(in[14], final_rounding);
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in[15] = _mm_adds_epi16(in[15], final_rounding);
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in[0] = _mm_srai_epi16(in[0], 6);
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in[1] = _mm_srai_epi16(in[1], 6);
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in[2] = _mm_srai_epi16(in[2], 6);
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in[3] = _mm_srai_epi16(in[3], 6);
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in[4] = _mm_srai_epi16(in[4], 6);
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in[5] = _mm_srai_epi16(in[5], 6);
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in[6] = _mm_srai_epi16(in[6], 6);
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in[7] = _mm_srai_epi16(in[7], 6);
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in[8] = _mm_srai_epi16(in[8], 6);
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in[9] = _mm_srai_epi16(in[9], 6);
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in[10] = _mm_srai_epi16(in[10], 6);
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in[11] = _mm_srai_epi16(in[11], 6);
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in[12] = _mm_srai_epi16(in[12], 6);
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in[13] = _mm_srai_epi16(in[13], 6);
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in[14] = _mm_srai_epi16(in[14], 6);
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in[15] = _mm_srai_epi16(in[15], 6);
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RECON_AND_STORE(dest, in[0]);
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RECON_AND_STORE(dest, in[1]);
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RECON_AND_STORE(dest, in[2]);
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RECON_AND_STORE(dest, in[3]);
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RECON_AND_STORE(dest, in[4]);
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RECON_AND_STORE(dest, in[5]);
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RECON_AND_STORE(dest, in[6]);
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RECON_AND_STORE(dest, in[7]);
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RECON_AND_STORE(dest, in[8]);
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RECON_AND_STORE(dest, in[9]);
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RECON_AND_STORE(dest, in[10]);
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RECON_AND_STORE(dest, in[11]);
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RECON_AND_STORE(dest, in[12]);
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RECON_AND_STORE(dest, in[13]);
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RECON_AND_STORE(dest, in[14]);
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RECON_AND_STORE(dest, in[15]);
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}
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