/usr/include/simd.h is in soundmodem 0.20-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* simd.h -- SIMD filter procedures (aka MMX, VIS, etc).
*
* Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Please note that the GPL allows you to use the driver, NOT the radio.
* In order to use the radio, you need a license from the communications
* authority of your country.
*
*/
/*****************************************************************************/
#ifndef _SIMD_H
#define _SIMD_H
/* ---------------------------------------------------------------------- */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "modem.h"
/* ---------------------------------------------------------------------- */
/*
* SIMD stuff
*/
#if !defined(__i386__)
#undef USEMMX
#endif
#if !defined(__sparc__) && !defined(__sparc64__)
#undef USEVIS
#endif
#if !defined(USEMMX) && !defined(USEVIS)
only_inline void initsimd(int enable)
{
}
only_inline int checksimd(void)
{
return 0;
}
only_inline int simdfir16(const int16_t *p1, const int16_t *p2, unsigned int nr)
{
int s = 0;
for (; nr > 0; nr--, p1++, p2++)
s += (*p1) * (*p2);
return s;
}
only_inline void simdpreparefpu(void)
{
}
#else
extern unsigned int simd_enabled;
extern void initsimd(int enable);
only_inline int checksimd(void)
{
return simd_enabled;
}
#if defined(USEMMX)
#define MMXCLOBBER "st", "st(1)", "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)"
only_inline int simdfir16(const int16_t *p1, const int16_t *p2, unsigned int nr)
{
unsigned int i, j;
int s = 0;
if (checksimd()) {
j = nr >> 2;
nr &= 3;
asm volatile("pxor\t%%mm0,%%mm0" : : : MMXCLOBBER);
for (i = 0; i < j; i++, p1 += 4, p2 += 4)
asm volatile("\n\tmovq\t%0,%%mm1"
"\n\tpmaddwd\t%1,%%mm1"
"\n\tpaddd\t%%mm1,%%mm0" : : "m" (*p1), "m" (*p2) : MMXCLOBBER);
asm volatile("\n\tmovq\t%%mm0,%%mm1 "
"\n\tpunpckhdq\t%%mm1,%%mm1"
"\n\tpaddd\t%%mm1,%%mm0"
"\n\tmovd\t%%mm0,%0" : "=m" (s) : : MMXCLOBBER);
}
for (; nr > 0; nr--, p1++, p2++)
s += (*p1) * (*p2);
return s;
}
only_inline void simdpreparefpu(void)
{
if (checksimd())
asm volatile("emms");
}
#elif defined(USEVIS)
/*only_inline*/static int simdfir16(const int16_t *p1, const int16_t *p2, unsigned int nr)
{
double dsum1, dsum2, dsum3, dsum4, arg1, arg2, arg3, arg4;
float sum, sum1, sum2;
unsigned int i, j;
int s = 0, sx[1];
if (checksimd()) {
j = nr >> 1;
nr &= 1;
asm("fzeros %0" : "=f" (sum));
for (i = 0; i < j; i++) {
asm volatile("ldda [%2] 0xd2, %0 ! ASI_FL16_P \n\t"
"ldda [%3] 0xd2, %1 ! ASI_FL16_P \n\t": "=e" (arg1), "=e" (arg2) : "r" (p1), "r" (p2));
p1++; p2++;
asm volatile("ldda [%2] 0xd2, %0 ! ASI_FL16_P \n\t"
"ldda [%3] 0xd2, %1 ! ASI_FL16_P \n\t": "=e" (arg3), "=e" (arg4) : "r" (p1), "r" (p2));
p1++; p2++;
asm volatile("fmuld8sux16 %L2,%L3,%0 \n\t"
"fmuld8ulx16 %L2,%L3,%1 \n\t" : "=&e" (dsum1), "=&e" (dsum2) : "e" (arg1), "e" (arg2));
asm volatile("fmuld8sux16 %L2,%L3,%0 \n\t"
"fmuld8ulx16 %L2,%L3,%1 \n\t" : "=&e" (dsum3), "=&e" (dsum4) : "e" (arg3), "e" (arg4));
asm volatile("fpadd32s %L1,%L2,%0" : "=f" (sum1) : "e" (dsum1), "e" (dsum2));
asm volatile("fpadd32s %L1,%L2,%0" : "=f" (sum2) : "e" (dsum3), "e" (dsum4));
asm volatile("fpadd32s %1,%2,%0" : "=f" (sum) : "f" (sum1), "f" (sum));
asm volatile("fpadd32s %1,%2,%0" : "=f" (sum) : "f" (sum2), "f" (sum));
};
asm("st %1,%0" : "=m" (sx) : "f" (sum));
s = sx[0];
}
for (; nr > 0; nr--, p1++, p2++)
s += (*p1) * (*p2);
return s;
}
only_inline void simdpreparefpu(void)
{
}
#endif
#endif
/* ---------------------------------------------------------------------- */
#endif /* _SIMD_H */
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