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[flac.git] / src / libFLAC / stream_encoder_intrin_sse2.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__SSE2_SUPPORTED
44
45 #include <stdlib.h>    /* for abs() */
46 #include <emmintrin.h> /* SSE2 */
47 #include "FLAC/assert.h"
48 #include "share/compat.h"
49
50 FLAC__SSE_TARGET("sse2")
51 static inline __m128i local_abs_epi32(__m128i val)
52 {
53         __m128i mask = _mm_srai_epi32(val, 31);
54         val = _mm_xor_si128(val, mask);
55         val = _mm_sub_epi32(val, mask);
56         return val;
57 }
58
59
60 FLAC__SSE_TARGET("sse2")
61 void FLAC__precompute_partition_info_sums_intrin_sse2(const FLAC__int32 residual[], FLAC__uint64 abs_residual_partition_sums[],
62                 unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order, unsigned bps)
63 {
64         const unsigned default_partition_samples = (residual_samples + predictor_order) >> max_partition_order;
65         unsigned partitions = 1u << max_partition_order;
66
67         FLAC__ASSERT(default_partition_samples > predictor_order);
68
69         /* first do max_partition_order */
70         {
71                 const unsigned threshold = 32 - FLAC__bitmath_ilog2(default_partition_samples);
72                 unsigned partition, residual_sample, end = (unsigned)(-(int)predictor_order);
73
74                 if(bps + FLAC__MAX_EXTRA_RESIDUAL_BPS < threshold) {
75                         for(partition = residual_sample = 0; partition < partitions; partition++) {
76                                 __m128i mm_sum = _mm_setzero_si128();
77                                 unsigned e1, e3;
78                                 end += default_partition_samples;
79
80                                 e1 = (residual_sample + 3) & ~3; e3 = end & ~3;
81                                 if(e1 > end)
82                                         e1 = end; /* try flac -l 1 -b 16 and you'll be here */
83
84                                 /* assumption: residual[] is properly aligned so (residual + e1) is properly aligned too and _mm_loadu_si128() is fast */
85                                 for( ; residual_sample < e1; residual_sample++) {
86                                         __m128i mm_res = local_abs_epi32(_mm_cvtsi32_si128(residual[residual_sample]));
87                                         mm_sum = _mm_add_epi32(mm_sum, mm_res);
88                                 }
89
90                                 for( ; residual_sample < e3; residual_sample+=4) {
91                                         __m128i mm_res = local_abs_epi32(_mm_loadu_si128((const __m128i*)(residual+residual_sample)));
92                                         mm_sum = _mm_add_epi32(mm_sum, mm_res);
93                                 }
94
95                                 for( ; residual_sample < end; residual_sample++) {
96                                         __m128i mm_res = local_abs_epi32(_mm_cvtsi32_si128(residual[residual_sample]));
97                                         mm_sum = _mm_add_epi32(mm_sum, mm_res);
98                                 }
99
100                                 mm_sum = _mm_add_epi32(mm_sum, _mm_srli_si128(mm_sum, 8));
101                                 mm_sum = _mm_add_epi32(mm_sum, _mm_srli_si128(mm_sum, 4));
102                                 abs_residual_partition_sums[partition] = (FLAC__uint32)_mm_cvtsi128_si32(mm_sum);
103 /* workaround for a bug in MSVC2015U2 - see https://connect.microsoft.com/VisualStudio/feedback/details/2659191/incorrect-code-generation-for-x86-64 */
104 #if (defined _MSC_VER) && (_MSC_FULL_VER == 190023918) && (defined FLAC__CPU_X86_64)
105                                 abs_residual_partition_sums[partition] &= 0xFFFFFFFF;
106 #endif
107                         }
108                 }
109                 else { /* have to pessimistically use 64 bits for accumulator */
110                         for(partition = residual_sample = 0; partition < partitions; partition++) {
111                                 __m128i mm_sum = _mm_setzero_si128();
112                                 unsigned e1, e3;
113                                 end += default_partition_samples;
114
115                                 e1 = (residual_sample + 1) & ~1; e3 = end & ~1;
116                                 FLAC__ASSERT(e1 <= end);
117
118                                 for( ; residual_sample < e1; residual_sample++) {
119                                         __m128i mm_res = local_abs_epi32(_mm_cvtsi32_si128(residual[residual_sample])); /*  0   0   0  |r0|  ==   00   |r0_64| */
120                                         mm_sum = _mm_add_epi64(mm_sum, mm_res);
121                                 }
122
123                                 for( ; residual_sample < e3; residual_sample+=2) {
124                                         __m128i mm_res = local_abs_epi32(_mm_loadl_epi64((const __m128i*)(residual+residual_sample))); /*  0   0  |r1|   |r0| */
125                                         mm_res = _mm_shuffle_epi32(mm_res, _MM_SHUFFLE(3,1,2,0)); /* 0  |r1|  0  |r0|  ==  |r1_64|  |r0_64|  */
126                                         mm_sum = _mm_add_epi64(mm_sum, mm_res);
127                                 }
128
129                                 for( ; residual_sample < end; residual_sample++) {
130                                         __m128i mm_res = local_abs_epi32(_mm_cvtsi32_si128(residual[residual_sample]));
131                                         mm_sum = _mm_add_epi64(mm_sum, mm_res);
132                                 }
133
134                                 mm_sum = _mm_add_epi64(mm_sum, _mm_srli_si128(mm_sum, 8));
135                                 _mm_storel_epi64((__m128i*)(abs_residual_partition_sums+partition), mm_sum);
136                         }
137                 }
138         }
139
140         /* now merge partitions for lower orders */
141         {
142                 unsigned from_partition = 0, to_partition = partitions;
143                 int partition_order;
144                 for(partition_order = (int)max_partition_order - 1; partition_order >= (int)min_partition_order; partition_order--) {
145                         unsigned i;
146                         partitions >>= 1;
147                         for(i = 0; i < partitions; i++) {
148                                 abs_residual_partition_sums[to_partition++] =
149                                         abs_residual_partition_sums[from_partition  ] +
150                                         abs_residual_partition_sums[from_partition+1];
151                                 from_partition += 2;
152                         }
153                 }
154         }
155 }
156
157 #endif /* FLAC__SSE2_SUPPORTED */
158 #endif /* (FLAC__CPU_IA32 || FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN */
159 #endif /* FLAC__NO_ASM */