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/*! \file conv_acc_neon.c
* Accelerated Viterbi decoder implementation
* for architectures with only NEON available. */
/*
* (C) 2020 by sysmocom - s.f.m.c. GmbH
* Author: Eric Wild
*
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* 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 <stdlib.h>
#include <stdint.h>
#include <malloc.h>
#include "config.h"
#if defined(HAVE_NEON)
#include <arm_neon.h>
#endif
/* align req is 16 on android because google was confused, 8 on sane platforms */
#define NEON_ALIGN 8
#include <conv_acc_neon_impl.h>
/* Aligned Memory Allocator
* NEON requires 8-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_neon_vdec_malloc(size_t n)
{
return (int16_t *) memalign(NEON_ALIGN, sizeof(int16_t) * n);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_neon_vdec_free(int16_t *ptr)
{
free(ptr);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_neon_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] };
_neon_metrics_k5_n2(_val, out, sums, paths, norm);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_neon_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 };
_neon_metrics_k5_n4(_val, out, sums, paths, norm);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_neon_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] };
_neon_metrics_k5_n4(_val, out, sums, paths, norm);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_neon_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] };
_neon_metrics_k7_n2(_val, out, sums, paths, norm);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_neon_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 };
_neon_metrics_k7_n4(_val, out, sums, paths, norm);
}
__attribute__ ((visibility("hidden")))
void osmo_conv_neon_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] };
_neon_metrics_k7_n4(_val, out, sums, paths, norm);
}
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