FLAC/src/stream_encoder_intrin_avx2.c

   1 /* libFLAC - Free Lossless Audio Codec library
   2  * Copyright (C) 2000-2009  Josh Coalson
   3  * Copyright (C) 2011-2016  Xiph.Org Foundation
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *
  12  * - Redistributions in binary form must reproduce the above copyright
  13  * notice, this list of conditions and the following disclaimer in the
  14  * documentation and/or other materials provided with the distribution.
  15  *
  16  * - Neither the name of the Xiph.org Foundation nor the names of its
  17  * contributors may be used to endorse or promote products derived from
  18  * this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifdef HAVE_CONFIG_H
  34 #  include <config.h>
  35 #endif
  36
  37 #include "private/cpu.h"
  38
  39 #ifndef FLAC__NO_ASM
  40 #if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN
  41 #include "private/stream_encoder.h"
  42 #include "private/bitmath.h"
  43 #ifdef FLAC__AVX2_SUPPORTED
  44
  45 #include <stdlib.h>    /* for abs() */
  46 #include <immintrin.h> /* AVX2 */
  47 #include "FLAC/assert.h"
  48
  49 FLAC__SSE_TARGET("avx2")
  50 void FLAC__precompute_partition_info_sums_intrin_avx2(const FLAC__int32 residual[], FLAC__uint64 abs_residual_partition_sums[],
  51                 uint32_t residual_samples, uint32_t predictor_order, uint32_t min_partition_order, uint32_t max_partition_order, uint32_t bps)
  52 {
  53         const uint32_t default_partition_samples = (residual_samples + predictor_order) >> max_partition_order;
  54         uint32_t partitions = 1u << max_partition_order;
  55
  56         FLAC__ASSERT(default_partition_samples > predictor_order);
  57
  58         /* first do max_partition_order */
  59         {
  60                 const uint32_t threshold = 32 - FLAC__bitmath_ilog2(default_partition_samples);
  61                 uint32_t partition, residual_sample, end = (uint32_t)(-(int32_t)predictor_order);
  62
  63                 if(bps + FLAC__MAX_EXTRA_RESIDUAL_BPS < threshold) {
  64                         for(partition = residual_sample = 0; partition < partitions; partition++) {
  65                                 __m256i sum256 = _mm256_setzero_si256();
  66                                 __m128i sum128;
  67                                 end += default_partition_samples;
  68
  69                                 for( ; (int)residual_sample < (int)end-7; residual_sample+=8) {
  70                                         __m256i res256 = _mm256_abs_epi32(_mm256_loadu_si256((const __m256i*)(residual+residual_sample)));
  71                                         sum256 = _mm256_add_epi32(sum256, res256);
  72                                 }
  73
  74                                 sum128 = _mm_add_epi32(_mm256_extracti128_si256(sum256, 1), _mm256_castsi256_si128(sum256));
  75
  76                                 for( ; (int)residual_sample < (int)end-3; residual_sample+=4) {
  77                                         __m128i res128 = _mm_abs_epi32(_mm_loadu_si128((const __m128i*)(residual+residual_sample)));
  78                                         sum128 = _mm_add_epi32(sum128, res128);
  79                                 }
  80
  81                                 for( ; residual_sample < end; residual_sample++) {
  82                                         __m128i res128 = _mm_abs_epi32(_mm_cvtsi32_si128(residual[residual_sample]));
  83                                         sum128 = _mm_add_epi32(sum128, res128);
  84                                 }
  85
  86                                 sum128 = _mm_add_epi32(sum128, _mm_shuffle_epi32(sum128, _MM_SHUFFLE(1,0,3,2)));
  87                                 sum128 = _mm_add_epi32(sum128, _mm_shufflelo_epi16(sum128, _MM_SHUFFLE(1,0,3,2)));
  88                                 abs_residual_partition_sums[partition] = (FLAC__uint32)_mm_cvtsi128_si32(sum128);
  89 /* workaround for MSVC bugs (at least versions 2015 and 2017 are affected) */
  90 #if (defined _MSC_VER) && (defined FLAC__CPU_X86_64)
  91                                 abs_residual_partition_sums[partition] &= 0xFFFFFFFF; /**/
  92 #endif
  93                         }
  94                 }
  95                 else { /* have to pessimistically use 64 bits for accumulator */
  96                         for(partition = residual_sample = 0; partition < partitions; partition++) {
  97                                 __m256i sum256 = _mm256_setzero_si256();
  98                                 __m128i sum128;
  99                                 end += default_partition_samples;
 100
 101                                 for( ; (int)residual_sample < (int)end-3; residual_sample+=4) {
 102                                         __m128i res128 = _mm_abs_epi32(_mm_loadu_si128((const __m128i*)(residual+residual_sample)));
 103                                         __m256i res256 = _mm256_cvtepu32_epi64(res128);
 104                                         sum256 = _mm256_add_epi64(sum256, res256);
 105                                 }
 106
 107                                 sum128 = _mm_add_epi64(_mm256_extracti128_si256(sum256, 1), _mm256_castsi256_si128(sum256));
 108
 109                                 for( ; (int)residual_sample < (int)end-1; residual_sample+=2) {
 110                                         __m128i res128 = _mm_abs_epi32(_mm_loadl_epi64((const __m128i*)(residual+residual_sample)));
 111                                         res128 = _mm_cvtepu32_epi64(res128);
 112                                         sum128 = _mm_add_epi64(sum128, res128);
 113                                 }
 114
 115                                 for( ; residual_sample < end; residual_sample++) {
 116                                         __m128i res128 = _mm_abs_epi32(_mm_cvtsi32_si128(residual[residual_sample]));
 117                                         sum128 = _mm_add_epi64(sum128, res128);
 118                                 }
 119
 120                                 sum128 = _mm_add_epi64(sum128, _mm_srli_si128(sum128, 8));
 121                                 _mm_storel_epi64((__m128i*)(abs_residual_partition_sums+partition), sum128);
 122                         }
 123                 }
 124         }
 125
 126         /* now merge partitions for lower orders */
 127         {
 128                 uint32_t from_partition = 0, to_partition = partitions;
 129                 int partition_order;
 130                 for(partition_order = (int)max_partition_order - 1; partition_order >= (int)min_partition_order; partition_order--) {
 131                         uint32_t i;
 132                         partitions >>= 1;
 133                         for(i = 0; i < partitions; i++) {
 134                                 abs_residual_partition_sums[to_partition++] =
 135                                         abs_residual_partition_sums[from_partition  ] +
 136                                         abs_residual_partition_sums[from_partition+1];
 137                                 from_partition += 2;
 138                         }
 139                 }
 140         }
 141         _mm256_zeroupper();
 142 }
 143
 144 #endif /* FLAC__AVX2_SUPPORTED */
 145 #endif /* (FLAC__CPU_IA32 || FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN */
 146 #endif /* FLAC__NO_ASM */