[pcsx_rearmed.git] / deps / flac-1.3.2 / src / libFLAC / fixed_intrin_ssse3.c

/* libFLAC - Free Lossless Audio Codec library
 * Copyright (C) 2000-2009  Josh Coalson
 * Copyright (C) 2011-2016  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

#include "private/cpu.h"

#ifndef FLAC__INTEGER_ONLY_LIBRARY
#ifndef FLAC__NO_ASM
#if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN
#include "private/fixed.h"
#ifdef FLAC__SSSE3_SUPPORTED

#include <tmmintrin.h> /* SSSE3 */
#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("ssse3")
unsigned FLAC__fixed_compute_best_predictor_intrin_ssse3(const FLAC__int32 data[], unsigned data_len, 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;
			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
			last_error = _mm_alignr_epi8(err0, err1, 4);					// e0  e1  e2  e3

			err0 = _mm_abs_epi32(err0);
			err1 = _mm_abs_epi32(err1);

			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] = (float)((total_error_0 > 0) ? log(M_LN2 * (double)total_error_0 / (double)data_len) / M_LN2 : 0.0);
	residual_bits_per_sample[1] = (float)((total_error_1 > 0) ? log(M_LN2 * (double)total_error_1 / (double)data_len) / M_LN2 : 0.0);
	residual_bits_per_sample[2] = (float)((total_error_2 > 0) ? log(M_LN2 * (double)total_error_2 / (double)data_len) / M_LN2 : 0.0);
	residual_bits_per_sample[3] = (float)((total_error_3 > 0) ? log(M_LN2 * (double)total_error_3 / (double)data_len) / M_LN2 : 0.0);
	residual_bits_per_sample[4] = (float)((total_error_4 > 0) ? log(M_LN2 * (double)total_error_4 / (double)data_len) / M_LN2 : 0.0);

	return order;
}

FLAC__SSE_TARGET("ssse3")
unsigned FLAC__fixed_compute_best_predictor_wide_intrin_ssse3(const FLAC__int32 data[], unsigned data_len, 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;
			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
			last_error = _mm_alignr_epi8(err0, err1, 4);					// e0  e1  e2  e3

			err0 = _mm_abs_epi32(err0);
			err1 = _mm_abs_epi32(err1);										// |e1| |e2| |e3| |e4|

			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] = (float)((total_error_0 > 0) ? log(M_LN2 * (double)total_error_0 / (double)data_len) / M_LN2 : 0.0);
	residual_bits_per_sample[1] = (float)((total_error_1 > 0) ? log(M_LN2 * (double)total_error_1 / (double)data_len) / M_LN2 : 0.0);
	residual_bits_per_sample[2] = (float)((total_error_2 > 0) ? log(M_LN2 * (double)total_error_2 / (double)data_len) / M_LN2 : 0.0);
	residual_bits_per_sample[3] = (float)((total_error_3 > 0) ? log(M_LN2 * (double)total_error_3 / (double)data_len) / M_LN2 : 0.0);
	residual_bits_per_sample[4] = (float)((total_error_4 > 0) ? log(M_LN2 * (double)total_error_4 / (double)data_len) / M_LN2 : 0.0);

	return order;
}

#endif /* FLAC__SSSE3_SUPPORTED */
#endif /* (FLAC__CPU_IA32 || FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN */
#endif /* FLAC__NO_ASM */
#endif /* FLAC__INTEGER_ONLY_LIBRARY */
Commit	Line	Data
ce188d4d	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__INTEGER_ONLY_LIBRARY
	40	#ifndef FLAC__NO_ASM
	41	#if (defined FLAC__CPU_IA32 \|\| defined FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN
	42	#include "private/fixed.h"
	43	#ifdef FLAC__SSSE3_SUPPORTED
	44
	45	#include <tmmintrin.h> /* SSSE3 */
	46	#include <math.h>
	47	#include "private/macros.h"
	48	#include "share/compat.h"
	49	#include "FLAC/assert.h"
	50
	51	#ifdef FLAC__CPU_IA32
	52	#define m128i_to_i64(dest, src) _mm_storel_epi64((__m128i*)&dest, src)
	53	#else
	54	#define m128i_to_i64(dest, src) dest = _mm_cvtsi128_si64(src)
	55	#endif
	56
	57	FLAC__SSE_TARGET("ssse3")
	58	unsigned FLAC__fixed_compute_best_predictor_intrin_ssse3(const FLAC__int32 data[], unsigned data_len, float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1])
	59	{
	60	FLAC__uint32 total_error_0, total_error_1, total_error_2, total_error_3, total_error_4;
	61	unsigned i, order;
	62
	63	__m128i total_err0, total_err1, total_err2;
	64
65	{
66	FLAC__int32 itmp;
67	__m128i last_error;
68
69	last_error = _mm_cvtsi32_si128(data[-1]); // 0 0 0 le0
70	itmp = data[-2];
71	last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
72	last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 0 le0 le1
73	itmp -= data[-3];
74	last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
75	last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 le0 le1 le2
76	itmp -= data[-3] - data[-4];
77	last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
78	last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // le0 le1 le2 le3
79
80	total_err0 = total_err1 = _mm_setzero_si128();
81	for(i = 0; i < data_len; i++) {
82	__m128i err0, err1;
83	err0 = _mm_cvtsi32_si128(data[i]); // 0 0 0 e0
84	err1 = _mm_shuffle_epi32(err0, _MM_SHUFFLE(0,0,0,0)); // e0 e0 e0 e0
85	#if 1 /* OPT_SSE */
86	err1 = _mm_sub_epi32(err1, last_error);
87	last_error = _mm_srli_si128(last_error, 4); // 0 le0 le1 le2
88	err1 = _mm_sub_epi32(err1, last_error);
89	last_error = _mm_srli_si128(last_error, 4); // 0 0 le0 le1
90	err1 = _mm_sub_epi32(err1, last_error);
91	last_error = _mm_srli_si128(last_error, 4); // 0 0 0 le0
92	err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4
93	#else
94	last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 8)); // le0 le1 le2+le0 le3+le1
95	last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 4)); // le0 le1+le0 le2+le0+le1 le3+le1+le2+le0
96	err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4
97	#endif
98	last_error = _mm_alignr_epi8(err0, err1, 4); // e0 e1 e2 e3
99
100	err0 = _mm_abs_epi32(err0);
101	err1 = _mm_abs_epi32(err1);
102
103	total_err0 = _mm_add_epi32(total_err0, err0); // 0 0 0 te0
104	total_err1 = _mm_add_epi32(total_err1, err1); // te1 te2 te3 te4
105	}
106	}
107
108	total_error_0 = _mm_cvtsi128_si32(total_err0);
109	total_err2 = total_err1; // te1 te2 te3 te4
110	total_err1 = _mm_srli_si128(total_err1, 8); // 0 0 te1 te2
111	total_error_4 = _mm_cvtsi128_si32(total_err2);
112	total_error_2 = _mm_cvtsi128_si32(total_err1);
113	total_err2 = _mm_srli_si128(total_err2, 4); // 0 te1 te2 te3
114	total_err1 = _mm_srli_si128(total_err1, 4); // 0 0 0 te1
115	total_error_3 = _mm_cvtsi128_si32(total_err2);
116	total_error_1 = _mm_cvtsi128_si32(total_err1);
117
118	/* prefer higher order */
119	if(total_error_0 < flac_min(flac_min(flac_min(total_error_1, total_error_2), total_error_3), total_error_4))
120	order = 0;
121	else if(total_error_1 < flac_min(flac_min(total_error_2, total_error_3), total_error_4))
122	order = 1;
123	else if(total_error_2 < flac_min(total_error_3, total_error_4))
124	order = 2;
125	else if(total_error_3 < total_error_4)
126	order = 3;
127	else
128	order = 4;
129
130	/* Estimate the expected number of bits per residual signal sample. */
131	/* 'total_error' is linearly related to the variance of the residual /
132	/* signal, so we use it directly to compute E(\|x\|) */
133	FLAC__ASSERT(data_len > 0 \|\| total_error_0 == 0);
134	FLAC__ASSERT(data_len > 0 \|\| total_error_1 == 0);
135	FLAC__ASSERT(data_len > 0 \|\| total_error_2 == 0);
136	FLAC__ASSERT(data_len > 0 \|\| total_error_3 == 0);
137	FLAC__ASSERT(data_len > 0 \|\| total_error_4 == 0);
138
139	residual_bits_per_sample[0] = (float)((total_error_0 > 0) ? log(M_LN2 * (double)total_error_0 / (double)data_len) / M_LN2 : 0.0);
140	residual_bits_per_sample[1] = (float)((total_error_1 > 0) ? log(M_LN2 * (double)total_error_1 / (double)data_len) / M_LN2 : 0.0);
141	residual_bits_per_sample[2] = (float)((total_error_2 > 0) ? log(M_LN2 * (double)total_error_2 / (double)data_len) / M_LN2 : 0.0);
142	residual_bits_per_sample[3] = (float)((total_error_3 > 0) ? log(M_LN2 * (double)total_error_3 / (double)data_len) / M_LN2 : 0.0);
143	residual_bits_per_sample[4] = (float)((total_error_4 > 0) ? log(M_LN2 * (double)total_error_4 / (double)data_len) / M_LN2 : 0.0);
144
145	return order;
146	}
147
148	FLAC__SSE_TARGET("ssse3")
149	unsigned FLAC__fixed_compute_best_predictor_wide_intrin_ssse3(const FLAC__int32 data[], unsigned data_len, float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1])
150	{
151	FLAC__uint64 total_error_0, total_error_1, total_error_2, total_error_3, total_error_4;
152	unsigned i, order;
153
154	__m128i total_err0, total_err1, total_err3;
155
156	{
157	FLAC__int32 itmp;
158	__m128i last_error, zero = _mm_setzero_si128();
159
160	last_error = _mm_cvtsi32_si128(data[-1]); // 0 0 0 le0
161	itmp = data[-2];
162	last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
163	last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 0 le0 le1
164	itmp -= data[-3];
165	last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
166	last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 le0 le1 le2
167	itmp -= data[-3] - data[-4];
168	last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
169	last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // le0 le1 le2 le3
170
171	total_err0 = total_err1 = total_err3 = _mm_setzero_si128();
172	for(i = 0; i < data_len; i++) {
173	__m128i err0, err1;
174	err0 = _mm_cvtsi32_si128(data[i]); // 0 0 0 e0
175	err1 = _mm_shuffle_epi32(err0, _MM_SHUFFLE(0,0,0,0)); // e0 e0 e0 e0
176	#if 1 /* OPT_SSE */
177	err1 = _mm_sub_epi32(err1, last_error);
178	last_error = _mm_srli_si128(last_error, 4); // 0 le0 le1 le2
179	err1 = _mm_sub_epi32(err1, last_error);
180	last_error = _mm_srli_si128(last_error, 4); // 0 0 le0 le1
181	err1 = _mm_sub_epi32(err1, last_error);
182	last_error = _mm_srli_si128(last_error, 4); // 0 0 0 le0
183	err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4
184	#else
185	last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 8)); // le0 le1 le2+le0 le3+le1
186	last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 4)); // le0 le1+le0 le2+le0+le1 le3+le1+le2+le0
187	err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4
188	#endif
189	last_error = _mm_alignr_epi8(err0, err1, 4); // e0 e1 e2 e3
190
191	err0 = _mm_abs_epi32(err0);
192	err1 = _mm_abs_epi32(err1); // \|e1\| \|e2\| \|e3\| \|e4\|
193
194	total_err0 = _mm_add_epi64(total_err0, err0); // 0 te0
195	err0 = _mm_unpacklo_epi32(err1, zero); // 0 \|e3\| 0 \|e4\|
196	err1 = _mm_unpackhi_epi32(err1, zero); // 0 \|e1\| 0 \|e2\|
197	total_err3 = _mm_add_epi64(total_err3, err0); // te3 te4
198	total_err1 = _mm_add_epi64(total_err1, err1); // te1 te2
199	}
200	}
201
202	m128i_to_i64(total_error_0, total_err0);
203	m128i_to_i64(total_error_4, total_err3);
204	m128i_to_i64(total_error_2, total_err1);
205	total_err3 = _mm_srli_si128(total_err3, 8); // 0 te3
206	total_err1 = _mm_srli_si128(total_err1, 8); // 0 te1
207	m128i_to_i64(total_error_3, total_err3);
208	m128i_to_i64(total_error_1, total_err1);
209
210	/* prefer higher order */
211	if(total_error_0 < flac_min(flac_min(flac_min(total_error_1, total_error_2), total_error_3), total_error_4))
212	order = 0;
213	else if(total_error_1 < flac_min(flac_min(total_error_2, total_error_3), total_error_4))
214	order = 1;
215	else if(total_error_2 < flac_min(total_error_3, total_error_4))
216	order = 2;
217	else if(total_error_3 < total_error_4)
218	order = 3;
219	else
220	order = 4;
221
222	/* Estimate the expected number of bits per residual signal sample. */
223	/* 'total_error' is linearly related to the variance of the residual /
224	/* signal, so we use it directly to compute E(\|x\|) */
225	FLAC__ASSERT(data_len > 0 \|\| total_error_0 == 0);
226	FLAC__ASSERT(data_len > 0 \|\| total_error_1 == 0);
227	FLAC__ASSERT(data_len > 0 \|\| total_error_2 == 0);
228	FLAC__ASSERT(data_len > 0 \|\| total_error_3 == 0);
229	FLAC__ASSERT(data_len > 0 \|\| total_error_4 == 0);
230
231	residual_bits_per_sample[0] = (float)((total_error_0 > 0) ? log(M_LN2 * (double)total_error_0 / (double)data_len) / M_LN2 : 0.0);
232	residual_bits_per_sample[1] = (float)((total_error_1 > 0) ? log(M_LN2 * (double)total_error_1 / (double)data_len) / M_LN2 : 0.0);
233	residual_bits_per_sample[2] = (float)((total_error_2 > 0) ? log(M_LN2 * (double)total_error_2 / (double)data_len) / M_LN2 : 0.0);
234	residual_bits_per_sample[3] = (float)((total_error_3 > 0) ? log(M_LN2 * (double)total_error_3 / (double)data_len) / M_LN2 : 0.0);
235	residual_bits_per_sample[4] = (float)((total_error_4 > 0) ? log(M_LN2 * (double)total_error_4 / (double)data_len) / M_LN2 : 0.0);
236
237	return order;
238	}
239
240	#endif /* FLAC__SSSE3_SUPPORTED */
241	#endif /* (FLAC__CPU_IA32 \|\| FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN */
242	#endif /* FLAC__NO_ASM */
243	#endif /* FLAC__INTEGER_ONLY_LIBRARY */