libFLAC/cpu.c: Get rid of OS_IS_ANDROID function
[flac.git] / src / libFLAC / stream_encoder_intrin_avx2.c
1 /* libFLAC - Free Lossless Audio Codec library
2  * Copyright (C) 2000-2009  Josh Coalson
3  * Copyright (C) 2011-2014  Xiph.Org Foundation
4  *
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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
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14  * documentation and/or other materials provided with the distribution.
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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 */