1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000-2009 Josh Coalson
3 * Copyright (C) 2011-2016 Xiph.Org Foundation
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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.
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.
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.
37 #include "private/cpu.h"
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__SSSE3_SUPPORTED
45 #include <stdlib.h> /* for abs() */
46 #include <tmmintrin.h> /* SSSE3 */
47 #include "FLAC/assert.h"
49 FLAC__SSE_TARGET("ssse3")
50 void FLAC__precompute_partition_info_sums_intrin_ssse3(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)
53 const unsigned default_partition_samples = (residual_samples + predictor_order) >> max_partition_order;
54 unsigned partitions = 1u << max_partition_order;
56 FLAC__ASSERT(default_partition_samples > predictor_order);
58 /* first do max_partition_order */
60 const unsigned threshold = 32 - FLAC__bitmath_ilog2(default_partition_samples);
61 unsigned partition, residual_sample, end = (unsigned)(-(int)predictor_order);
63 if(bps + FLAC__MAX_EXTRA_RESIDUAL_BPS < threshold) {
64 for(partition = residual_sample = 0; partition < partitions; partition++) {
65 __m128i mm_sum = _mm_setzero_si128();
67 end += default_partition_samples;
69 e1 = (residual_sample + 3) & ~3; e3 = end & ~3;
71 e1 = end; /* try flac -l 1 -b 16 and you'll be here */
73 /* assumption: residual[] is properly aligned so (residual + e1) is properly aligned too and _mm_loadu_si128() is fast */
74 for( ; residual_sample < e1; residual_sample++) {
75 __m128i mm_res = _mm_abs_epi32(_mm_cvtsi32_si128(residual[residual_sample]));
76 mm_sum = _mm_add_epi32(mm_sum, mm_res);
79 for( ; residual_sample < e3; residual_sample+=4) {
80 __m128i mm_res = _mm_abs_epi32(_mm_loadu_si128((const __m128i*)(residual+residual_sample)));
81 mm_sum = _mm_add_epi32(mm_sum, mm_res);
84 for( ; residual_sample < end; residual_sample++) {
85 __m128i mm_res = _mm_abs_epi32(_mm_cvtsi32_si128(residual[residual_sample]));
86 mm_sum = _mm_add_epi32(mm_sum, mm_res);
89 mm_sum = _mm_hadd_epi32(mm_sum, mm_sum);
90 mm_sum = _mm_hadd_epi32(mm_sum, mm_sum);
91 abs_residual_partition_sums[partition] = (FLAC__uint32)_mm_cvtsi128_si32(mm_sum);
92 /* workaround for a bug in MSVC2015U2 - see https://connect.microsoft.com/VisualStudio/feedback/details/2659191/incorrect-code-generation-for-x86-64 */
93 #if (defined _MSC_VER) && (_MSC_FULL_VER == 190023918) && (defined FLAC__CPU_X86_64)
94 abs_residual_partition_sums[partition] &= 0xFFFFFFFF;
98 else { /* have to pessimistically use 64 bits for accumulator */
99 for(partition = residual_sample = 0; partition < partitions; partition++) {
100 __m128i mm_sum = _mm_setzero_si128();
102 end += default_partition_samples;
104 e1 = (residual_sample + 1) & ~1; e3 = end & ~1;
105 FLAC__ASSERT(e1 <= end);
107 for( ; residual_sample < e1; residual_sample++) {
108 __m128i mm_res = _mm_abs_epi32(_mm_cvtsi32_si128(residual[residual_sample])); /* 0 0 0 |r0| == 00 |r0_64| */
109 mm_sum = _mm_add_epi64(mm_sum, mm_res);
112 for( ; residual_sample < e3; residual_sample+=2) {
113 __m128i mm_res = _mm_abs_epi32(_mm_loadl_epi64((const __m128i*)(residual+residual_sample))); /* 0 0 |r1| |r0| */
114 mm_res = _mm_shuffle_epi32(mm_res, _MM_SHUFFLE(3,1,2,0)); /* 0 |r1| 0 |r0| == |r1_64| |r0_64| */
115 mm_sum = _mm_add_epi64(mm_sum, mm_res);
118 for( ; residual_sample < end; residual_sample++) {
119 __m128i mm_res = _mm_abs_epi32(_mm_cvtsi32_si128(residual[residual_sample]));
120 mm_sum = _mm_add_epi64(mm_sum, mm_res);
123 mm_sum = _mm_add_epi64(mm_sum, _mm_srli_si128(mm_sum, 8));
124 _mm_storel_epi64((__m128i*)(abs_residual_partition_sums+partition), mm_sum);
129 /* now merge partitions for lower orders */
131 unsigned from_partition = 0, to_partition = partitions;
133 for(partition_order = (int)max_partition_order - 1; partition_order >= (int)min_partition_order; partition_order--) {
136 for(i = 0; i < partitions; i++) {
137 abs_residual_partition_sums[to_partition++] =
138 abs_residual_partition_sums[from_partition ] +
139 abs_residual_partition_sums[from_partition+1];
146 #endif /* FLAC__SSSE3_SUPPORTED */
147 #endif /* (FLAC__CPU_IA32 || FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN */
148 #endif /* FLAC__NO_ASM */