Update FLAC to 1.3.1

src/libFLAC/fixed_intrin_sse2.c

+/* libFLAC - Free Lossless Audio Codec library
+ * Copyright (C) 2000-2009  Josh Coalson
+ * Copyright (C) 2011-2014  Xiph.Org Foundation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the Xiph.org Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#ifndef FLAC__INTEGER_ONLY_LIBRARY
+#ifndef FLAC__NO_ASM
+#if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && defined FLAC__HAS_X86INTRIN
+#include "private/fixed.h"
+#ifdef FLAC__SSE2_SUPPORTED
+
+#include <emmintrin.h> /* SSE2 */
+#include <math.h>
+#include "private/macros.h"
+#include "share/compat.h"
+#include "FLAC/assert.h"
+
+#ifdef FLAC__CPU_IA32
+#define m128i_to_i64(dest, src) _mm_storel_epi64((__m128i*)&dest, src)
+#else
+#define m128i_to_i64(dest, src) dest = _mm_cvtsi128_si64(src)
+#endif
+
+FLAC__SSE_TARGET("sse2")
+unsigned FLAC__fixed_compute_best_predictor_intrin_sse2(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1])
+{
+        FLAC__uint32 total_error_0, total_error_1, total_error_2, total_error_3, total_error_4;
+        unsigned i, order;
+
+        __m128i total_err0, total_err1, total_err2;
+
+        {
+                FLAC__int32 itmp;
+                __m128i last_error;
+
+                last_error = _mm_cvtsi32_si128(data[-1]);                                                       // 0   0   0   le0
+                itmp = data[-2];
+                last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
+                last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp));        // 0   0   le0 le1
+                itmp -= data[-3];
+                last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
+                last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp));        // 0   le0 le1 le2
+                itmp -= data[-3] - data[-4];
+                last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
+                last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp));        // le0 le1 le2 le3
+
+                total_err0 = total_err1 = _mm_setzero_si128();
+                for(i = 0; i < data_len; i++) {
+                        __m128i err0, err1, tmp;
+                        err0 = _mm_cvtsi32_si128(data[i]);                                                              // 0   0   0   e0
+                        err1 = _mm_shuffle_epi32(err0, _MM_SHUFFLE(0,0,0,0));                   // e0  e0  e0  e0
+#if 1 /* OPT_SSE */
+                        err1 = _mm_sub_epi32(err1, last_error);
+                        last_error = _mm_srli_si128(last_error, 4);                                             // 0   le0 le1 le2
+                        err1 = _mm_sub_epi32(err1, last_error);
+                        last_error = _mm_srli_si128(last_error, 4);                                             // 0   0   le0 le1
+                        err1 = _mm_sub_epi32(err1, last_error);
+                        last_error = _mm_srli_si128(last_error, 4);                                             // 0   0   0   le0
+                        err1 = _mm_sub_epi32(err1, last_error);                                                 // e1  e2  e3  e4
+#else
+                        last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 8));  // le0  le1  le2+le0  le3+le1
+                        last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 4));  // le0  le1+le0  le2+le0+le1  le3+le1+le2+le0
+                        err1 = _mm_sub_epi32(err1, last_error);                                                 // e1  e2  e3  e4
+#endif
+                        tmp = _mm_slli_si128(err0, 12);                                                                 // e0   0   0   0
+                        last_error = _mm_srli_si128(err1, 4);                                                   //  0  e1  e2  e3
+                        last_error = _mm_or_si128(last_error, tmp);                                             // e0  e1  e2  e3
+
+                        tmp = _mm_srai_epi32(err0, 31);
+                        err0 = _mm_xor_si128(err0, tmp);
+                        err0 = _mm_sub_epi32(err0, tmp);
+                        tmp = _mm_srai_epi32(err1, 31);
+                        err1 = _mm_xor_si128(err1, tmp);
+                        err1 = _mm_sub_epi32(err1, tmp);
+
+                        total_err0 = _mm_add_epi32(total_err0, err0);                                   // 0   0   0   te0
+                        total_err1 = _mm_add_epi32(total_err1, err1);                                   // te1 te2 te3 te4
+                }
+        }
+        
+        total_error_0 = _mm_cvtsi128_si32(total_err0);
+        total_err2 = total_err1;                                                                                        // te1  te2  te3  te4
+        total_err1 = _mm_srli_si128(total_err1, 8);                                                     //  0    0   te1  te2
+        total_error_4 = _mm_cvtsi128_si32(total_err2);
+        total_error_2 = _mm_cvtsi128_si32(total_err1);
+        total_err2 = _mm_srli_si128(total_err2, 4);                                                     //  0   te1  te2  te3
+        total_err1 = _mm_srli_si128(total_err1, 4);                                                     //  0    0    0   te1
+        total_error_3 = _mm_cvtsi128_si32(total_err2);
+        total_error_1 = _mm_cvtsi128_si32(total_err1);
+
+        /* prefer higher order */
+        if(total_error_0 < flac_min(flac_min(flac_min(total_error_1, total_error_2), total_error_3), total_error_4))
+                order = 0;
+        else if(total_error_1 < flac_min(flac_min(total_error_2, total_error_3), total_error_4))
+                order = 1;
+        else if(total_error_2 < flac_min(total_error_3, total_error_4))
+                order = 2;
+        else if(total_error_3 < total_error_4)
+                order = 3;
+        else
+                order = 4;
+
+        /* Estimate the expected number of bits per residual signal sample. */
+        /* 'total_error*' is linearly related to the variance of the residual */
+        /* signal, so we use it directly to compute E(|x|) */
+        FLAC__ASSERT(data_len > 0 || total_error_0 == 0);
+        FLAC__ASSERT(data_len > 0 || total_error_1 == 0);
+        FLAC__ASSERT(data_len > 0 || total_error_2 == 0);
+        FLAC__ASSERT(data_len > 0 || total_error_3 == 0);
+        FLAC__ASSERT(data_len > 0 || total_error_4 == 0);
+
+        residual_bits_per_sample[0] = (FLAC__float)((total_error_0 > 0) ? log(M_LN2 * (FLAC__double)total_error_0 / (FLAC__double)data_len) / M_LN2 : 0.0);
+        residual_bits_per_sample[1] = (FLAC__float)((total_error_1 > 0) ? log(M_LN2 * (FLAC__double)total_error_1 / (FLAC__double)data_len) / M_LN2 : 0.0);
+        residual_bits_per_sample[2] = (FLAC__float)((total_error_2 > 0) ? log(M_LN2 * (FLAC__double)total_error_2 / (FLAC__double)data_len) / M_LN2 : 0.0);
+        residual_bits_per_sample[3] = (FLAC__float)((total_error_3 > 0) ? log(M_LN2 * (FLAC__double)total_error_3 / (FLAC__double)data_len) / M_LN2 : 0.0);
+        residual_bits_per_sample[4] = (FLAC__float)((total_error_4 > 0) ? log(M_LN2 * (FLAC__double)total_error_4 / (FLAC__double)data_len) / M_LN2 : 0.0);
+
+        return order;
+}
+
+FLAC__SSE_TARGET("sse2")
+unsigned FLAC__fixed_compute_best_predictor_wide_intrin_sse2(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1])
+{
+        FLAC__uint64 total_error_0, total_error_1, total_error_2, total_error_3, total_error_4;
+        unsigned i, order;
+
+        __m128i total_err0, total_err1, total_err3;
+
+        {
+                FLAC__int32 itmp;
+                __m128i last_error, zero = _mm_setzero_si128();
+                
+                last_error = _mm_cvtsi32_si128(data[-1]);                                                       // 0   0   0   le0
+                itmp = data[-2];
+                last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
+                last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp));        // 0   0   le0 le1
+                itmp -= data[-3];
+                last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
+                last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp));        // 0   le0 le1 le2
+                itmp -= data[-3] - data[-4];
+                last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
+                last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp));        // le0 le1 le2 le3
+
+                total_err0 = total_err1 = total_err3 = _mm_setzero_si128();
+                for(i = 0; i < data_len; i++) {
+                        __m128i err0, err1, tmp;
+                        err0 = _mm_cvtsi32_si128(data[i]);                                                              // 0   0   0   e0
+                        err1 = _mm_shuffle_epi32(err0, _MM_SHUFFLE(0,0,0,0));                   // e0  e0  e0  e0
+#if 1 /* OPT_SSE */
+                        err1 = _mm_sub_epi32(err1, last_error);
+                        last_error = _mm_srli_si128(last_error, 4);                                             // 0   le0 le1 le2
+                        err1 = _mm_sub_epi32(err1, last_error);
+                        last_error = _mm_srli_si128(last_error, 4);                                             // 0   0   le0 le1
+                        err1 = _mm_sub_epi32(err1, last_error);
+                        last_error = _mm_srli_si128(last_error, 4);                                             // 0   0   0   le0
+                        err1 = _mm_sub_epi32(err1, last_error);                                                 // e1  e2  e3  e4
+#else
+                        last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 8));  // le0  le1  le2+le0  le3+le1
+                        last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 4));  // le0  le1+le0  le2+le0+le1  le3+le1+le2+le0
+                        err1 = _mm_sub_epi32(err1, last_error);                                                 // e1  e2  e3  e4
+#endif
+                        tmp = _mm_slli_si128(err0, 12);                                                                 // e0   0   0   0
+                        last_error = _mm_srli_si128(err1, 4);                                                   //  0  e1  e2  e3
+                        last_error = _mm_or_si128(last_error, tmp);                                             // e0  e1  e2  e3
+
+                        tmp = _mm_srai_epi32(err0, 31);
+                        err0 = _mm_xor_si128(err0, tmp);
+                        err0 = _mm_sub_epi32(err0, tmp);
+                        tmp = _mm_srai_epi32(err1, 31);
+                        err1 = _mm_xor_si128(err1, tmp);
+                        err1 = _mm_sub_epi32(err1, tmp);
+
+                        total_err0 = _mm_add_epi64(total_err0, err0);                                   //        0       te0
+                        err0 = _mm_unpacklo_epi32(err1, zero);                                                  //   0  |e3|   0  |e4|
+                        err1 = _mm_unpackhi_epi32(err1, zero);                                                  //   0  |e1|   0  |e2|
+                        total_err3 = _mm_add_epi64(total_err3, err0);                                   //       te3      te4
+                        total_err1 = _mm_add_epi64(total_err1, err1);                                   //       te1      te2
+                }
+        }
+        
+        m128i_to_i64(total_error_0, total_err0);
+        m128i_to_i64(total_error_4, total_err3);
+        m128i_to_i64(total_error_2, total_err1);
+        total_err3 = _mm_srli_si128(total_err3, 8);                                                     //         0      te3
+        total_err1 = _mm_srli_si128(total_err1, 8);                                                     //         0      te1
+        m128i_to_i64(total_error_3, total_err3);
+        m128i_to_i64(total_error_1, total_err1);
+
+        /* prefer higher order */
+        if(total_error_0 < flac_min(flac_min(flac_min(total_error_1, total_error_2), total_error_3), total_error_4))
+                order = 0;
+        else if(total_error_1 < flac_min(flac_min(total_error_2, total_error_3), total_error_4))
+                order = 1;
+        else if(total_error_2 < flac_min(total_error_3, total_error_4))
+                order = 2;
+        else if(total_error_3 < total_error_4)
+                order = 3;
+        else
+                order = 4;
+
+        /* Estimate the expected number of bits per residual signal sample. */
+        /* 'total_error*' is linearly related to the variance of the residual */
+        /* signal, so we use it directly to compute E(|x|) */
+        FLAC__ASSERT(data_len > 0 || total_error_0 == 0);
+        FLAC__ASSERT(data_len > 0 || total_error_1 == 0);
+        FLAC__ASSERT(data_len > 0 || total_error_2 == 0);
+        FLAC__ASSERT(data_len > 0 || total_error_3 == 0);
+        FLAC__ASSERT(data_len > 0 || total_error_4 == 0);
+
+        residual_bits_per_sample[0] = (FLAC__float)((total_error_0 > 0) ? log(M_LN2 * (FLAC__double)total_error_0 / (FLAC__double)data_len) / M_LN2 : 0.0);
+        residual_bits_per_sample[1] = (FLAC__float)((total_error_1 > 0) ? log(M_LN2 * (FLAC__double)total_error_1 / (FLAC__double)data_len) / M_LN2 : 0.0);
+        residual_bits_per_sample[2] = (FLAC__float)((total_error_2 > 0) ? log(M_LN2 * (FLAC__double)total_error_2 / (FLAC__double)data_len) / M_LN2 : 0.0);
+        residual_bits_per_sample[3] = (FLAC__float)((total_error_3 > 0) ? log(M_LN2 * (FLAC__double)total_error_3 / (FLAC__double)data_len) / M_LN2 : 0.0);
+        residual_bits_per_sample[4] = (FLAC__float)((total_error_4 > 0) ? log(M_LN2 * (FLAC__double)total_error_4 / (FLAC__double)data_len) / M_LN2 : 0.0);
+
+        return order;
+}
+
+#endif /* FLAC__SSE2_SUPPORTED */
+#endif /* (FLAC__CPU_IA32 || FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN */
+#endif /* FLAC__NO_ASM */
+#endif /* FLAC__INTEGER_ONLY_LIBRARY */