eca59cad0b
Remove dependency of this function on asm_offsets. ssse3/sse4 next. Change quant_shift calculation so it be done using SIMD. Pre-calculate as much as possible to simplify EOB selection. Take advantage of qcoeff being zero'd by tying the if statements together. Speed parity with previous implementation with gcc x86_64 linux Change-Id: Ife97556a1eca3a74b09def1a3d04084974dff1fb
231 lines
7.2 KiB
C
231 lines
7.2 KiB
C
/*
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* Copyright (c) 2012 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 "vpx_config.h"
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#include "vp8_rtcd.h"
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#include "vpx_ports/x86.h"
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#include "vpx_mem/vpx_mem.h"
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#include "vp8/encoder/block.h"
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#include "vp8/common/entropy.h" /* vp8_default_inv_zig_zag */
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#include <mmintrin.h> /* MMX */
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#include <xmmintrin.h> /* SSE */
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#include <emmintrin.h> /* SSE2 */
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#define SELECT_EOB(i, z) \
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do { \
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__label__ select_eob_end; \
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short boost = *zbin_boost_ptr; \
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int cmp = (x[z] < boost) | (y[z] == 0); \
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zbin_boost_ptr++; \
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if (cmp) \
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goto select_eob_end; \
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qcoeff_ptr[z] = y[z]; \
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eob = i; \
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zbin_boost_ptr = b->zrun_zbin_boost; \
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select_eob_end:; \
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} while (0)
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void vp8_regular_quantize_b_sse2(BLOCK *b, BLOCKD *d)
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{
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char eob = 0;
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short *zbin_boost_ptr = b->zrun_zbin_boost;
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short *qcoeff_ptr = d->qcoeff;
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DECLARE_ALIGNED_ARRAY(16, short, x, 16);
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DECLARE_ALIGNED_ARRAY(16, short, y, 16);
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__m128i sz0, x0, sz1, x1, y0, y1, x_minus_zbin0, x_minus_zbin1;
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__m128i quant_shift0 = _mm_load_si128((__m128i *)(b->quant_shift));
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__m128i quant_shift1 = _mm_load_si128((__m128i *)(b->quant_shift + 8));
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__m128i z0 = _mm_load_si128((__m128i *)(b->coeff));
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__m128i z1 = _mm_load_si128((__m128i *)(b->coeff+8));
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__m128i zbin_extra = _mm_cvtsi32_si128(b->zbin_extra);
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__m128i zbin0 = _mm_load_si128((__m128i *)(b->zbin));
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__m128i zbin1 = _mm_load_si128((__m128i *)(b->zbin + 8));
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__m128i round0 = _mm_load_si128((__m128i *)(b->round));
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__m128i round1 = _mm_load_si128((__m128i *)(b->round + 8));
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__m128i quant0 = _mm_load_si128((__m128i *)(b->quant));
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__m128i quant1 = _mm_load_si128((__m128i *)(b->quant + 8));
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__m128i dequant0 = _mm_load_si128((__m128i *)(d->dequant));
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__m128i dequant1 = _mm_load_si128((__m128i *)(d->dequant + 8));
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vpx_memset(qcoeff_ptr, 0, 32);
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/* Duplicate to all lanes. */
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zbin_extra = _mm_shufflelo_epi16(zbin_extra, 0);
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zbin_extra = _mm_unpacklo_epi16(zbin_extra, zbin_extra);
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/* Sign of z: z >> 15 */
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sz0 = _mm_srai_epi16(z0, 15);
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sz1 = _mm_srai_epi16(z1, 15);
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/* x = abs(z): (z ^ sz) - sz */
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x0 = _mm_xor_si128(z0, sz0);
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x1 = _mm_xor_si128(z1, sz1);
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x0 = _mm_sub_epi16(x0, sz0);
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x1 = _mm_sub_epi16(x1, sz1);
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/* zbin[] + zbin_extra */
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zbin0 = _mm_add_epi16(zbin0, zbin_extra);
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zbin1 = _mm_add_epi16(zbin1, zbin_extra);
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/* In C x is compared to zbin where zbin = zbin[] + boost + extra. Rebalance
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* the equation because boost is the only value which can change:
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* x - (zbin[] + extra) >= boost */
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x_minus_zbin0 = _mm_sub_epi16(x0, zbin0);
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x_minus_zbin1 = _mm_sub_epi16(x1, zbin1);
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_mm_store_si128((__m128i *)(x), x_minus_zbin0);
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_mm_store_si128((__m128i *)(x + 8), x_minus_zbin1);
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/* All the remaining calculations are valid whether they are done now with
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* simd or later inside the loop one at a time. */
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x0 = _mm_add_epi16(x0, round0);
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x1 = _mm_add_epi16(x1, round1);
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y0 = _mm_mulhi_epi16(x0, quant0);
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y1 = _mm_mulhi_epi16(x1, quant1);
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y0 = _mm_add_epi16(y0, x0);
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y1 = _mm_add_epi16(y1, x1);
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/* Instead of shifting each value independently we convert the scaling
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* factor with 1 << (16 - shift) so we can use multiply/return high half. */
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y0 = _mm_mulhi_epi16(y0, quant_shift0);
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y1 = _mm_mulhi_epi16(y1, quant_shift1);
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/* Return the sign: (y ^ sz) - sz */
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y0 = _mm_xor_si128(y0, sz0);
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y1 = _mm_xor_si128(y1, sz1);
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y0 = _mm_sub_epi16(y0, sz0);
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y1 = _mm_sub_epi16(y1, sz1);
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_mm_store_si128((__m128i *)(y), y0);
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_mm_store_si128((__m128i *)(y + 8), y1);
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zbin_boost_ptr = b->zrun_zbin_boost;
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/* The loop gets unrolled anyway. Avoid the vp8_default_zig_zag1d lookup. */
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SELECT_EOB(1, 0);
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SELECT_EOB(2, 1);
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SELECT_EOB(3, 4);
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SELECT_EOB(4, 8);
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SELECT_EOB(5, 5);
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SELECT_EOB(6, 2);
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SELECT_EOB(7, 3);
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SELECT_EOB(8, 6);
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SELECT_EOB(9, 9);
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SELECT_EOB(10, 12);
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SELECT_EOB(11, 13);
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SELECT_EOB(12, 10);
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SELECT_EOB(13, 7);
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SELECT_EOB(14, 11);
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SELECT_EOB(15, 14);
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SELECT_EOB(16, 15);
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y0 = _mm_load_si128((__m128i *)(d->qcoeff));
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y1 = _mm_load_si128((__m128i *)(d->qcoeff + 8));
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/* dqcoeff = qcoeff * dequant */
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y0 = _mm_mullo_epi16(y0, dequant0);
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y1 = _mm_mullo_epi16(y1, dequant1);
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_mm_store_si128((__m128i *)(d->dqcoeff), y0);
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_mm_store_si128((__m128i *)(d->dqcoeff + 8), y1);
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*d->eob = eob;
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}
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void vp8_fast_quantize_b_sse2(BLOCK *b, BLOCKD *d)
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{
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__m128i z0 = _mm_load_si128((__m128i *)(b->coeff));
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__m128i z1 = _mm_load_si128((__m128i *)(b->coeff + 8));
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__m128i round0 = _mm_load_si128((__m128i *)(b->round));
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__m128i round1 = _mm_load_si128((__m128i *)(b->round + 8));
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__m128i quant_fast0 = _mm_load_si128((__m128i *)(b->quant_fast));
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__m128i quant_fast1 = _mm_load_si128((__m128i *)(b->quant_fast + 8));
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__m128i dequant0 = _mm_load_si128((__m128i *)(d->dequant));
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__m128i dequant1 = _mm_load_si128((__m128i *)(d->dequant + 8));
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__m128i inv_zig_zag0 = _mm_load_si128((const __m128i *)(vp8_default_inv_zig_zag));
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__m128i inv_zig_zag1 = _mm_load_si128((const __m128i *)(vp8_default_inv_zig_zag + 8));
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__m128i sz0, sz1, x0, x1, y0, y1, xdq0, xdq1, zeros, ones;
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/* sign of z: z >> 15 */
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sz0 = _mm_srai_epi16(z0, 15);
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sz1 = _mm_srai_epi16(z1, 15);
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/* x = abs(z): (z ^ sz) - sz */
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x0 = _mm_xor_si128(z0, sz0);
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x1 = _mm_xor_si128(z1, sz1);
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x0 = _mm_sub_epi16(x0, sz0);
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x1 = _mm_sub_epi16(x1, sz1);
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/* x += round */
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x0 = _mm_add_epi16(x0, round0);
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x1 = _mm_add_epi16(x1, round1);
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/* y = (x * quant) >> 16 */
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y0 = _mm_mulhi_epi16(x0, quant_fast0);
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y1 = _mm_mulhi_epi16(x1, quant_fast1);
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/* x = abs(y) = (y ^ sz) - sz */
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y0 = _mm_xor_si128(y0, sz0);
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y1 = _mm_xor_si128(y1, sz1);
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x0 = _mm_sub_epi16(y0, sz0);
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x1 = _mm_sub_epi16(y1, sz1);
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/* qcoeff = x */
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_mm_store_si128((__m128i *)(d->qcoeff), x0);
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_mm_store_si128((__m128i *)(d->qcoeff + 8), x1);
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/* x * dequant */
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xdq0 = _mm_mullo_epi16(x0, dequant0);
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xdq1 = _mm_mullo_epi16(x1, dequant1);
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/* dqcoeff = x * dequant */
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_mm_store_si128((__m128i *)(d->dqcoeff), xdq0);
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_mm_store_si128((__m128i *)(d->dqcoeff + 8), xdq1);
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/* build a mask for the zig zag */
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zeros = _mm_setzero_si128();
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x0 = _mm_cmpeq_epi16(x0, zeros);
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x1 = _mm_cmpeq_epi16(x1, zeros);
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ones = _mm_cmpeq_epi16(zeros, zeros);
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x0 = _mm_xor_si128(x0, ones);
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x1 = _mm_xor_si128(x1, ones);
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x0 = _mm_and_si128(x0, inv_zig_zag0);
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x1 = _mm_and_si128(x1, inv_zig_zag1);
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x0 = _mm_max_epi16(x0, x1);
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/* now down to 8 */
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x1 = _mm_shuffle_epi32(x0, 0xE); // 0b00001110
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x0 = _mm_max_epi16(x0, x1);
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/* only 4 left */
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x1 = _mm_shufflelo_epi16(x0, 0xE); // 0b00001110
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x0 = _mm_max_epi16(x0, x1);
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/* okay, just 2! */
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x1 = _mm_shufflelo_epi16(x0, 0x1); // 0b00000001
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x0 = _mm_max_epi16(x0, x1);
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*d->eob = 0xFF & _mm_cvtsi128_si32(x0);
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}
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