1 /* 2 * Copyright (c) 2012 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 12 #include <smmintrin.h> /* SSE4.1 */ 13 14 #include "./vp8_rtcd.h" 15 #include "vp8/encoder/block.h" 16 #include "vp8/common/entropy.h" /* vp8_default_inv_zig_zag */ 17 18 #define SELECT_EOB(i, z, x, y, q) \ 19 do { \ 20 short boost = *zbin_boost_ptr; \ 21 short x_z = _mm_extract_epi16(x, z); \ 22 short y_z = _mm_extract_epi16(y, z); \ 23 int cmp = (x_z < boost) | (y_z == 0); \ 24 zbin_boost_ptr++; \ 25 if (cmp) \ 26 break; \ 27 q = _mm_insert_epi16(q, y_z, z); \ 28 eob = i; \ 29 zbin_boost_ptr = b->zrun_zbin_boost; \ 30 } while (0) 31 32 void vp8_regular_quantize_b_sse4_1(BLOCK *b, BLOCKD *d) { 33 char eob = 0; 34 short *zbin_boost_ptr = b->zrun_zbin_boost; 35 36 __m128i sz0, x0, sz1, x1, y0, y1, x_minus_zbin0, x_minus_zbin1, 37 dqcoeff0, dqcoeff1; 38 __m128i quant_shift0 = _mm_load_si128((__m128i *)(b->quant_shift)); 39 __m128i quant_shift1 = _mm_load_si128((__m128i *)(b->quant_shift + 8)); 40 __m128i z0 = _mm_load_si128((__m128i *)(b->coeff)); 41 __m128i z1 = _mm_load_si128((__m128i *)(b->coeff+8)); 42 __m128i zbin_extra = _mm_cvtsi32_si128(b->zbin_extra); 43 __m128i zbin0 = _mm_load_si128((__m128i *)(b->zbin)); 44 __m128i zbin1 = _mm_load_si128((__m128i *)(b->zbin + 8)); 45 __m128i round0 = _mm_load_si128((__m128i *)(b->round)); 46 __m128i round1 = _mm_load_si128((__m128i *)(b->round + 8)); 47 __m128i quant0 = _mm_load_si128((__m128i *)(b->quant)); 48 __m128i quant1 = _mm_load_si128((__m128i *)(b->quant + 8)); 49 __m128i dequant0 = _mm_load_si128((__m128i *)(d->dequant)); 50 __m128i dequant1 = _mm_load_si128((__m128i *)(d->dequant + 8)); 51 __m128i qcoeff0 = _mm_setzero_si128(); 52 __m128i qcoeff1 = _mm_setzero_si128(); 53 54 /* Duplicate to all lanes. */ 55 zbin_extra = _mm_shufflelo_epi16(zbin_extra, 0); 56 zbin_extra = _mm_unpacklo_epi16(zbin_extra, zbin_extra); 57 58 /* Sign of z: z >> 15 */ 59 sz0 = _mm_srai_epi16(z0, 15); 60 sz1 = _mm_srai_epi16(z1, 15); 61 62 /* x = abs(z): (z ^ sz) - sz */ 63 x0 = _mm_xor_si128(z0, sz0); 64 x1 = _mm_xor_si128(z1, sz1); 65 x0 = _mm_sub_epi16(x0, sz0); 66 x1 = _mm_sub_epi16(x1, sz1); 67 68 /* zbin[] + zbin_extra */ 69 zbin0 = _mm_add_epi16(zbin0, zbin_extra); 70 zbin1 = _mm_add_epi16(zbin1, zbin_extra); 71 72 /* In C x is compared to zbin where zbin = zbin[] + boost + extra. Rebalance 73 * the equation because boost is the only value which can change: 74 * x - (zbin[] + extra) >= boost */ 75 x_minus_zbin0 = _mm_sub_epi16(x0, zbin0); 76 x_minus_zbin1 = _mm_sub_epi16(x1, zbin1); 77 78 /* All the remaining calculations are valid whether they are done now with 79 * simd or later inside the loop one at a time. */ 80 x0 = _mm_add_epi16(x0, round0); 81 x1 = _mm_add_epi16(x1, round1); 82 83 y0 = _mm_mulhi_epi16(x0, quant0); 84 y1 = _mm_mulhi_epi16(x1, quant1); 85 86 y0 = _mm_add_epi16(y0, x0); 87 y1 = _mm_add_epi16(y1, x1); 88 89 /* Instead of shifting each value independently we convert the scaling 90 * factor with 1 << (16 - shift) so we can use multiply/return high half. */ 91 y0 = _mm_mulhi_epi16(y0, quant_shift0); 92 y1 = _mm_mulhi_epi16(y1, quant_shift1); 93 94 /* Return the sign: (y ^ sz) - sz */ 95 y0 = _mm_xor_si128(y0, sz0); 96 y1 = _mm_xor_si128(y1, sz1); 97 y0 = _mm_sub_epi16(y0, sz0); 98 y1 = _mm_sub_epi16(y1, sz1); 99 100 /* The loop gets unrolled anyway. Avoid the vp8_default_zig_zag1d lookup. */ 101 SELECT_EOB(1, 0, x_minus_zbin0, y0, qcoeff0); 102 SELECT_EOB(2, 1, x_minus_zbin0, y0, qcoeff0); 103 SELECT_EOB(3, 4, x_minus_zbin0, y0, qcoeff0); 104 SELECT_EOB(4, 0, x_minus_zbin1, y1, qcoeff1); 105 SELECT_EOB(5, 5, x_minus_zbin0, y0, qcoeff0); 106 SELECT_EOB(6, 2, x_minus_zbin0, y0, qcoeff0); 107 SELECT_EOB(7, 3, x_minus_zbin0, y0, qcoeff0); 108 SELECT_EOB(8, 6, x_minus_zbin0, y0, qcoeff0); 109 SELECT_EOB(9, 1, x_minus_zbin1, y1, qcoeff1); 110 SELECT_EOB(10, 4, x_minus_zbin1, y1, qcoeff1); 111 SELECT_EOB(11, 5, x_minus_zbin1, y1, qcoeff1); 112 SELECT_EOB(12, 2, x_minus_zbin1, y1, qcoeff1); 113 SELECT_EOB(13, 7, x_minus_zbin0, y0, qcoeff0); 114 SELECT_EOB(14, 3, x_minus_zbin1, y1, qcoeff1); 115 SELECT_EOB(15, 6, x_minus_zbin1, y1, qcoeff1); 116 SELECT_EOB(16, 7, x_minus_zbin1, y1, qcoeff1); 117 118 _mm_store_si128((__m128i *)(d->qcoeff), qcoeff0); 119 _mm_store_si128((__m128i *)(d->qcoeff + 8), qcoeff1); 120 121 dqcoeff0 = _mm_mullo_epi16(qcoeff0, dequant0); 122 dqcoeff1 = _mm_mullo_epi16(qcoeff1, dequant1); 123 124 _mm_store_si128((__m128i *)(d->dqcoeff), dqcoeff0); 125 _mm_store_si128((__m128i *)(d->dqcoeff + 8), dqcoeff1); 126 127 *d->eob = eob; 128 } 129
