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/*
* Intel SSE Viterbi decoder
*
* Copyright (C) 2013, 2014 Thomas Tsou <tom@tsou.cc>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdint.h>
#include "config.h"
#include <emmintrin.h>
#include <tmmintrin.h>
#include <xmmintrin.h>
#if defined(HAVE_SSE4_1)
#include <smmintrin.h>
#endif
#define SSE_ALIGN 16
/* Broadcast 16-bit integer
* Repeat the low 16-bit integer to all elements of the 128-bit SSE
* register. Only AVX2 has a dedicated broadcast instruction; use repeat
* unpacks for SSE only architectures. This is a destructive operation and
* the source register is overwritten.
*
* Input:
* M0 - Low 16-bit element is read
*
* Output:
* M0 - Contains broadcasted values
*/
#define SSE_BROADCAST(M0) \
{ \
M0 = _mm_unpacklo_epi16(M0, M0); \
M0 = _mm_unpacklo_epi32(M0, M0); \
M0 = _mm_unpacklo_epi64(M0, M0); \
}
/**
* Include common SSE implementation
*/
#include <viterbi_sse_common.h>
/* Aligned Memory Allocator
* SSE requires 16-byte memory alignment. We store relevant trellis values
* (accumulated sums, outputs, and path decisions) as 16 bit signed integers
* so the allocated memory is casted as such.
*/
__attribute__ ((visibility("hidden")))
int16_t *osmo_conv_sse_vdec_malloc(size_t n)
{
return (int16_t *) _mm_malloc(sizeof(int16_t) * n, SSE_ALIGN);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_sse_vdec_free(int16_t *ptr)
{
_mm_free(ptr);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_sse_metrics_k5_n2(const int8_t *val, const int16_t *out,
int16_t *sums, int16_t *paths, int norm)
{
const int16_t _val[4] = { val[0], val[1], val[0], val[1] };
_sse_metrics_k5_n2(_val, out, sums, paths, norm);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_sse_metrics_k5_n3(const int8_t *val, const int16_t *out,
int16_t *sums, int16_t *paths, int norm)
{
const int16_t _val[4] = { val[0], val[1], val[2], 0 };
_sse_metrics_k5_n4(_val, out, sums, paths, norm);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_sse_metrics_k5_n4(const int8_t *val, const int16_t *out,
int16_t *sums, int16_t *paths, int norm)
{
const int16_t _val[4] = { val[0], val[1], val[2], val[3] };
_sse_metrics_k5_n4(_val, out, sums, paths, norm);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_sse_metrics_k7_n2(const int8_t *val, const int16_t *out,
int16_t *sums, int16_t *paths, int norm)
{
const int16_t _val[4] = { val[0], val[1], val[0], val[1] };
_sse_metrics_k7_n2(_val, out, sums, paths, norm);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_sse_metrics_k7_n3(const int8_t *val, const int16_t *out,
int16_t *sums, int16_t *paths, int norm)
{
const int16_t _val[4] = { val[0], val[1], val[2], 0 };
_sse_metrics_k7_n4(_val, out, sums, paths, norm);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_sse_metrics_k7_n4(const int8_t *val, const int16_t *out,
int16_t *sums, int16_t *paths, int norm)
{
const int16_t _val[4] = { val[0], val[1], val[2], val[3] };
_sse_metrics_k7_n4(_val, out, sums, paths, norm);
}
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