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 unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order, unsigned bps) 52 { 53 const unsigned default_partition_samples = (residual_samples + predictor_order) >> max_partition_order; 54 unsigned partitions = 1u << max_partition_order; 55 56 FLAC__ASSERT(default_partition_samples > predictor_order); 57 58 /* first do max_partition_order */ 59 { 60 const unsigned threshold = 32 - FLAC__bitmath_ilog2(default_partition_samples); 61 unsigned partition, residual_sample, end = (unsigned)(-(int)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_hadd_epi32(sum128, sum128); 87 sum128 = _mm_hadd_epi32(sum128, sum128); 88 abs_residual_partition_sums[partition] = (FLAC__uint32)_mm_cvtsi128_si32(sum128); 89 /* workaround for a bug in MSVC2015U2 - see https://connect.microsoft.com/VisualStudio/feedback/details/2659191/incorrect-code-generation-for-x86-64 */ 90 #if (defined _MSC_VER) && (_MSC_FULL_VER == 190023918) && (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 unsigned 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 unsigned 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 */ 147
