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Transceiver52M: Add SSE floating point / integer conversion
Convertions are performed in multiples of 4 or 8. All loads are considered unaligned. Signed-off-by: Thomas Tsou <tom@tsou.cc> git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@6734 19bc5d8c-e614-43d4-8b26-e1612bc8e597
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Oct 17, 2013
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/* | ||
* SSE type conversions | ||
* Copyright (C) 2013 Thomas Tsou <tom@tsou.cc> | ||
* | ||
* This library is free software; you can redistribute it and/or | ||
* modify it under the terms of the GNU Lesser General Public | ||
* License as published by the Free Software Foundation; either | ||
* version 2.1 of the License, or (at your option) any later version. | ||
* | ||
* This library is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
* Lesser General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU Lesser General Public | ||
* License along with this library; if not, write to the Free Software | ||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
*/ | ||
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#include <malloc.h> | ||
#include <string.h> | ||
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#ifdef HAVE_CONFIG_H | ||
#include "config.h" | ||
#endif | ||
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#ifdef HAVE_SSE3 | ||
#include <xmmintrin.h> | ||
#include <emmintrin.h> | ||
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#ifdef HAVE_SSE4_1 | ||
#include <smmintrin.h> | ||
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/* 16*N 16-bit signed integer converted to single precision floats */ | ||
static void _sse_convert_si16_ps_16n(float *restrict out, | ||
short *restrict in, | ||
int len) | ||
{ | ||
__m128i m0, m1, m2, m3, m4, m5; | ||
__m128 m6, m7, m8, m9; | ||
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for (int i = 0; i < len / 16; i++) { | ||
/* Load (unaligned) packed floats */ | ||
m0 = _mm_loadu_si128((__m128i *) &in[16 * i + 0]); | ||
m1 = _mm_loadu_si128((__m128i *) &in[16 * i + 8]); | ||
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/* Unpack */ | ||
m2 = _mm_cvtepi16_epi32(m0); | ||
m4 = _mm_cvtepi16_epi32(m1); | ||
m0 = _mm_shuffle_epi32(m0, _MM_SHUFFLE(1, 0, 3, 2)); | ||
m1 = _mm_shuffle_epi32(m1, _MM_SHUFFLE(1, 0, 3, 2)); | ||
m3 = _mm_cvtepi16_epi32(m0); | ||
m5 = _mm_cvtepi16_epi32(m1); | ||
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/* Convert */ | ||
m6 = _mm_cvtepi32_ps(m2); | ||
m7 = _mm_cvtepi32_ps(m3); | ||
m8 = _mm_cvtepi32_ps(m4); | ||
m9 = _mm_cvtepi32_ps(m5); | ||
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/* Store */ | ||
_mm_storeu_ps(&out[16 * i + 0], m6); | ||
_mm_storeu_ps(&out[16 * i + 4], m7); | ||
_mm_storeu_ps(&out[16 * i + 8], m8); | ||
_mm_storeu_ps(&out[16 * i + 12], m9); | ||
} | ||
} | ||
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/* 16*N 16-bit signed integer conversion with remainder */ | ||
static void _sse_convert_si16_ps(float *restrict out, | ||
short *restrict in, | ||
int len) | ||
{ | ||
int start = len / 16 * 16; | ||
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_sse_convert_si16_ps_16n(out, in, len); | ||
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for (int i = 0; i < len % 16; i++) | ||
out[start + i] = in[start + i]; | ||
} | ||
#endif /* HAVE_SSE4_1 */ | ||
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/* 8*N single precision floats scaled and converted to 16-bit signed integer */ | ||
static void _sse_convert_scale_ps_si16_8n(short *restrict out, | ||
float *restrict in, | ||
float scale, int len) | ||
{ | ||
__m128 m0, m1, m2; | ||
__m128i m4, m5; | ||
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for (int i = 0; i < len / 8; i++) { | ||
/* Load (unaligned) packed floats */ | ||
m0 = _mm_loadu_ps(&in[8 * i + 0]); | ||
m1 = _mm_loadu_ps(&in[8 * i + 4]); | ||
m2 = _mm_load1_ps(&scale); | ||
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/* Scale */ | ||
m0 = _mm_mul_ps(m0, m2); | ||
m1 = _mm_mul_ps(m1, m2); | ||
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/* Convert */ | ||
m4 = _mm_cvtps_epi32(m0); | ||
m5 = _mm_cvtps_epi32(m1); | ||
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/* Pack and store */ | ||
m5 = _mm_packs_epi32(m4, m5); | ||
_mm_storeu_si128((__m128i *) &out[8 * i], m5); | ||
} | ||
} | ||
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/* 8*N single precision floats scaled and converted with remainder */ | ||
static void _sse_convert_scale_ps_si16(short *restrict out, | ||
float *restrict in, | ||
float scale, int len) | ||
{ | ||
int start = len / 8 * 8; | ||
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_sse_convert_scale_ps_si16_8n(out, in, scale, len); | ||
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for (int i = 0; i < len % 8; i++) | ||
out[start + i] = in[start + i] * scale; | ||
} | ||
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/* 16*N single precision floats scaled and converted to 16-bit signed integer */ | ||
static void _sse_convert_scale_ps_si16_16n(short *restrict out, | ||
float *restrict in, | ||
float scale, int len) | ||
{ | ||
__m128 m0, m1, m2, m3, m4; | ||
__m128i m5, m6, m7, m8; | ||
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for (int i = 0; i < len / 16; i++) { | ||
/* Load (unaligned) packed floats */ | ||
m0 = _mm_loadu_ps(&in[16 * i + 0]); | ||
m1 = _mm_loadu_ps(&in[16 * i + 4]); | ||
m2 = _mm_loadu_ps(&in[16 * i + 8]); | ||
m3 = _mm_loadu_ps(&in[16 * i + 12]); | ||
m4 = _mm_load1_ps(&scale); | ||
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/* Scale */ | ||
m0 = _mm_mul_ps(m0, m4); | ||
m1 = _mm_mul_ps(m1, m4); | ||
m2 = _mm_mul_ps(m2, m4); | ||
m3 = _mm_mul_ps(m3, m4); | ||
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/* Convert */ | ||
m5 = _mm_cvtps_epi32(m0); | ||
m6 = _mm_cvtps_epi32(m1); | ||
m7 = _mm_cvtps_epi32(m2); | ||
m8 = _mm_cvtps_epi32(m3); | ||
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/* Pack and store */ | ||
m5 = _mm_packs_epi32(m5, m6); | ||
m7 = _mm_packs_epi32(m7, m8); | ||
_mm_storeu_si128((__m128i *) &out[16 * i + 0], m5); | ||
_mm_storeu_si128((__m128i *) &out[16 * i + 8], m7); | ||
} | ||
} | ||
#else /* HAVE_SSE3 */ | ||
static void convert_scale_ps_si16(short *out, float *in, float scale, int len) | ||
{ | ||
for (int i = 0; i < len; i++) | ||
out[i] = in[i] * scale; | ||
} | ||
#endif | ||
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#ifndef HAVE_SSE_4_1 | ||
static void convert_si16_ps(float *out, short *in, int len) | ||
{ | ||
for (int i = 0; i < len; i++) | ||
out[i] = in[i]; | ||
} | ||
#endif | ||
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void convert_float_short(short *out, float *in, float scale, int len) | ||
{ | ||
#ifdef HAVE_SSE3 | ||
if (!(len % 16)) | ||
_sse_convert_scale_ps_si16_16n(out, in, scale, len); | ||
else if (!(len % 8)) | ||
_sse_convert_scale_ps_si16_8n(out, in, scale, len); | ||
else | ||
_sse_convert_scale_ps_si16(out, in, scale, len); | ||
#else | ||
convert_scale_ps_si16(out, in, scale, len); | ||
#endif | ||
} | ||
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void convert_short_float(float *out, short *in, int len) | ||
{ | ||
#ifdef HAVE_SSE4_1 | ||
if (!(len % 16)) | ||
_sse_convert_si16_ps_16n(out, in, len); | ||
else | ||
_sse_convert_si16_ps(out, in, len); | ||
#else | ||
convert_si16_ps(out, in, len); | ||
#endif | ||
} |
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#ifndef _CONVERT_H_ | ||
#define _CONVERT_H_ | ||
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void convert_float_short(short *out, float *in, float scale, int len); | ||
void convert_short_float(float *out, short *in, int len); | ||
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#endif /* _CONVERT_H_ */ |
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