Osmocom GSM/GPRS/EGPRS transceiver, originally forked from OpenBTS transceiver. For building SDR based GSM BTS with osmo-bts-trx.
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osmo-trx/Transceiver52M/arch/x86/convert.c

79 lines
2.4 KiB

/*
* 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.
*/
#include <malloc.h>
#include <string.h>
#include "convert.h"
#include "convert_sse_3.h"
#include "convert_sse_4_1.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* Architecture dependent function pointers */
struct convert_cpu_context {
void (*convert_si16_ps_16n) (float *, const short *, int);
void (*convert_si16_ps) (float *, const short *, int);
void (*convert_scale_ps_si16_16n)(short *, const float *, float, int);
void (*convert_scale_ps_si16_8n)(short *, const float *, float, int);
void (*convert_scale_ps_si16)(short *, const float *, float, int);
};
static struct convert_cpu_context c;
void convert_init(void)
{
c.convert_scale_ps_si16_16n = base_convert_float_short;
c.convert_scale_ps_si16_8n = base_convert_float_short;
c.convert_scale_ps_si16 = base_convert_float_short;
c.convert_si16_ps_16n = base_convert_short_float;
c.convert_si16_ps = base_convert_short_float;
#ifdef HAVE___BUILTIN_CPU_SUPPORTS
#ifdef HAVE_SSE4_1
if (__builtin_cpu_supports("sse4.1")) {
c.convert_si16_ps_16n = &_sse_convert_si16_ps_16n;
c.convert_si16_ps = &_sse_convert_si16_ps;
}
#endif
#ifdef HAVE_SSE3
if (__builtin_cpu_supports("sse3")) {
c.convert_scale_ps_si16_16n = _sse_convert_scale_ps_si16_16n;
c.convert_scale_ps_si16_8n = _sse_convert_scale_ps_si16_8n;
c.convert_scale_ps_si16 = _sse_convert_scale_ps_si16;
}
#endif
#endif
}
void convert_float_short(short *out, const float *in, float scale, int len)
{
if (!(len % 16))
c.convert_scale_ps_si16_16n(out, in, scale, len);
else if (!(len % 8))
c.convert_scale_ps_si16_8n(out, in, scale, len);
else
c.convert_scale_ps_si16(out, in, scale, len);
}
void convert_short_float(float *out, const short *in, int len)
{
if (!(len % 16))
c.convert_si16_ps_16n(out, in, len);
else
c.convert_si16_ps(out, in, len);
}