ref: fa99c376e509ef52ed8370019538b23e76477ddb
dir: /vp8/encoder/x86/vp8_quantize_sse2.c/
/* * Copyright (c) 2012 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE 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. */ #include "vpx_config.h" #include "vp8_rtcd.h" #include "vpx_ports/x86.h" #include "vpx_mem/vpx_mem.h" #include "vp8/encoder/block.h" #include "vp8/common/entropy.h" /* vp8_default_inv_zig_zag */ #include <mmintrin.h> /* MMX */ #include <xmmintrin.h> /* SSE */ #include <emmintrin.h> /* SSE2 */ #define SELECT_EOB(i, z) \ do { \ short boost = *zbin_boost_ptr; \ int cmp = (x[z] < boost) | (y[z] == 0); \ zbin_boost_ptr++; \ if (cmp) \ break; \ qcoeff_ptr[z] = y[z]; \ eob = i; \ zbin_boost_ptr = b->zrun_zbin_boost; \ } while (0) void vp8_regular_quantize_b_sse2(BLOCK *b, BLOCKD *d) { char eob = 0; short *zbin_boost_ptr; short *qcoeff_ptr = d->qcoeff; DECLARE_ALIGNED(16, short, x[16]); DECLARE_ALIGNED(16, short, y[16]); __m128i sz0, x0, sz1, x1, y0, y1, x_minus_zbin0, x_minus_zbin1; __m128i quant_shift0 = _mm_load_si128((__m128i *)(b->quant_shift)); __m128i quant_shift1 = _mm_load_si128((__m128i *)(b->quant_shift + 8)); __m128i z0 = _mm_load_si128((__m128i *)(b->coeff)); __m128i z1 = _mm_load_si128((__m128i *)(b->coeff+8)); __m128i zbin_extra = _mm_cvtsi32_si128(b->zbin_extra); __m128i zbin0 = _mm_load_si128((__m128i *)(b->zbin)); __m128i zbin1 = _mm_load_si128((__m128i *)(b->zbin + 8)); __m128i round0 = _mm_load_si128((__m128i *)(b->round)); __m128i round1 = _mm_load_si128((__m128i *)(b->round + 8)); __m128i quant0 = _mm_load_si128((__m128i *)(b->quant)); __m128i quant1 = _mm_load_si128((__m128i *)(b->quant + 8)); __m128i dequant0 = _mm_load_si128((__m128i *)(d->dequant)); __m128i dequant1 = _mm_load_si128((__m128i *)(d->dequant + 8)); memset(qcoeff_ptr, 0, 32); /* Duplicate to all lanes. */ zbin_extra = _mm_shufflelo_epi16(zbin_extra, 0); zbin_extra = _mm_unpacklo_epi16(zbin_extra, zbin_extra); /* Sign of z: z >> 15 */ sz0 = _mm_srai_epi16(z0, 15); sz1 = _mm_srai_epi16(z1, 15); /* x = abs(z): (z ^ sz) - sz */ x0 = _mm_xor_si128(z0, sz0); x1 = _mm_xor_si128(z1, sz1); x0 = _mm_sub_epi16(x0, sz0); x1 = _mm_sub_epi16(x1, sz1); /* zbin[] + zbin_extra */ zbin0 = _mm_add_epi16(zbin0, zbin_extra); zbin1 = _mm_add_epi16(zbin1, zbin_extra); /* In C x is compared to zbin where zbin = zbin[] + boost + extra. Rebalance * the equation because boost is the only value which can change: * x - (zbin[] + extra) >= boost */ x_minus_zbin0 = _mm_sub_epi16(x0, zbin0); x_minus_zbin1 = _mm_sub_epi16(x1, zbin1); _mm_store_si128((__m128i *)(x), x_minus_zbin0); _mm_store_si128((__m128i *)(x + 8), x_minus_zbin1); /* All the remaining calculations are valid whether they are done now with * simd or later inside the loop one at a time. */ x0 = _mm_add_epi16(x0, round0); x1 = _mm_add_epi16(x1, round1); y0 = _mm_mulhi_epi16(x0, quant0); y1 = _mm_mulhi_epi16(x1, quant1); y0 = _mm_add_epi16(y0, x0); y1 = _mm_add_epi16(y1, x1); /* Instead of shifting each value independently we convert the scaling * factor with 1 << (16 - shift) so we can use multiply/return high half. */ y0 = _mm_mulhi_epi16(y0, quant_shift0); y1 = _mm_mulhi_epi16(y1, quant_shift1); /* Return the sign: (y ^ sz) - sz */ y0 = _mm_xor_si128(y0, sz0); y1 = _mm_xor_si128(y1, sz1); y0 = _mm_sub_epi16(y0, sz0); y1 = _mm_sub_epi16(y1, sz1); _mm_store_si128((__m128i *)(y), y0); _mm_store_si128((__m128i *)(y + 8), y1); zbin_boost_ptr = b->zrun_zbin_boost; /* The loop gets unrolled anyway. Avoid the vp8_default_zig_zag1d lookup. */ SELECT_EOB(1, 0); SELECT_EOB(2, 1); SELECT_EOB(3, 4); SELECT_EOB(4, 8); SELECT_EOB(5, 5); SELECT_EOB(6, 2); SELECT_EOB(7, 3); SELECT_EOB(8, 6); SELECT_EOB(9, 9); SELECT_EOB(10, 12); SELECT_EOB(11, 13); SELECT_EOB(12, 10); SELECT_EOB(13, 7); SELECT_EOB(14, 11); SELECT_EOB(15, 14); SELECT_EOB(16, 15); y0 = _mm_load_si128((__m128i *)(d->qcoeff)); y1 = _mm_load_si128((__m128i *)(d->qcoeff + 8)); /* dqcoeff = qcoeff * dequant */ y0 = _mm_mullo_epi16(y0, dequant0); y1 = _mm_mullo_epi16(y1, dequant1); _mm_store_si128((__m128i *)(d->dqcoeff), y0); _mm_store_si128((__m128i *)(d->dqcoeff + 8), y1); *d->eob = eob; } void vp8_fast_quantize_b_sse2(BLOCK *b, BLOCKD *d) { __m128i z0 = _mm_load_si128((__m128i *)(b->coeff)); __m128i z1 = _mm_load_si128((__m128i *)(b->coeff + 8)); __m128i round0 = _mm_load_si128((__m128i *)(b->round)); __m128i round1 = _mm_load_si128((__m128i *)(b->round + 8)); __m128i quant_fast0 = _mm_load_si128((__m128i *)(b->quant_fast)); __m128i quant_fast1 = _mm_load_si128((__m128i *)(b->quant_fast + 8)); __m128i dequant0 = _mm_load_si128((__m128i *)(d->dequant)); __m128i dequant1 = _mm_load_si128((__m128i *)(d->dequant + 8)); __m128i inv_zig_zag0 = _mm_load_si128((const __m128i *)(vp8_default_inv_zig_zag)); __m128i inv_zig_zag1 = _mm_load_si128((const __m128i *)(vp8_default_inv_zig_zag + 8)); __m128i sz0, sz1, x0, x1, y0, y1, xdq0, xdq1, zeros, ones; /* sign of z: z >> 15 */ sz0 = _mm_srai_epi16(z0, 15); sz1 = _mm_srai_epi16(z1, 15); /* x = abs(z): (z ^ sz) - sz */ x0 = _mm_xor_si128(z0, sz0); x1 = _mm_xor_si128(z1, sz1); x0 = _mm_sub_epi16(x0, sz0); x1 = _mm_sub_epi16(x1, sz1); /* x += round */ x0 = _mm_add_epi16(x0, round0); x1 = _mm_add_epi16(x1, round1); /* y = (x * quant) >> 16 */ y0 = _mm_mulhi_epi16(x0, quant_fast0); y1 = _mm_mulhi_epi16(x1, quant_fast1); /* x = abs(y) = (y ^ sz) - sz */ y0 = _mm_xor_si128(y0, sz0); y1 = _mm_xor_si128(y1, sz1); x0 = _mm_sub_epi16(y0, sz0); x1 = _mm_sub_epi16(y1, sz1); /* qcoeff = x */ _mm_store_si128((__m128i *)(d->qcoeff), x0); _mm_store_si128((__m128i *)(d->qcoeff + 8), x1); /* x * dequant */ xdq0 = _mm_mullo_epi16(x0, dequant0); xdq1 = _mm_mullo_epi16(x1, dequant1); /* dqcoeff = x * dequant */ _mm_store_si128((__m128i *)(d->dqcoeff), xdq0); _mm_store_si128((__m128i *)(d->dqcoeff + 8), xdq1); /* build a mask for the zig zag */ zeros = _mm_setzero_si128(); x0 = _mm_cmpeq_epi16(x0, zeros); x1 = _mm_cmpeq_epi16(x1, zeros); ones = _mm_cmpeq_epi16(zeros, zeros); x0 = _mm_xor_si128(x0, ones); x1 = _mm_xor_si128(x1, ones); x0 = _mm_and_si128(x0, inv_zig_zag0); x1 = _mm_and_si128(x1, inv_zig_zag1); x0 = _mm_max_epi16(x0, x1); /* now down to 8 */ x1 = _mm_shuffle_epi32(x0, 0xE); // 0b00001110 x0 = _mm_max_epi16(x0, x1); /* only 4 left */ x1 = _mm_shufflelo_epi16(x0, 0xE); // 0b00001110 x0 = _mm_max_epi16(x0, x1); /* okay, just 2! */ x1 = _mm_shufflelo_epi16(x0, 0x1); // 0b00000001 x0 = _mm_max_epi16(x0, x1); *d->eob = 0xFF & _mm_cvtsi128_si32(x0); }