81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2003, 2007-14 Matteo Frigo
|
||
|
|
* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
||
|
|
*
|
||
|
|
* 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 "kernel/ifftw.h"
|
||
|
|
|
||
|
|
#if HAVE_ALTIVEC
|
||
|
|
|
||
|
|
#if HAVE_SYS_SYSCTL_H
|
||
|
|
# include <sys/sysctl.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if HAVE_SYS_SYSCTL_H && HAVE_SYSCTL && defined(CTL_HW) && defined(HW_VECTORUNIT)
|
||
|
|
/* code for darwin */
|
||
|
|
static int really_have_altivec(void)
|
||
|
|
{
|
||
|
|
int mib[2], altivecp;
|
||
|
|
size_t len;
|
||
|
|
mib[0] = CTL_HW;
|
||
|
|
mib[1] = HW_VECTORUNIT;
|
||
|
|
len = sizeof(altivecp);
|
||
|
|
sysctl(mib, 2, &altivecp, &len, NULL, 0);
|
||
|
|
return altivecp;
|
||
|
|
}
|
||
|
|
#else /* GNU/Linux and other non-Darwin systems (!HAVE_SYS_SYSCTL_H etc.) */
|
||
|
|
|
||
|
|
#include <signal.h>
|
||
|
|
#include <setjmp.h>
|
||
|
|
|
||
|
|
static jmp_buf jb;
|
||
|
|
|
||
|
|
static void sighandler(int x)
|
||
|
|
{
|
||
|
|
longjmp(jb, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int really_have_altivec(void)
|
||
|
|
{
|
||
|
|
void (*oldsig)(int);
|
||
|
|
oldsig = signal(SIGILL, sighandler);
|
||
|
|
if (setjmp(jb)) {
|
||
|
|
signal(SIGILL, oldsig);
|
||
|
|
return 0;
|
||
|
|
} else {
|
||
|
|
__asm__ __volatile__ (".long 0x10000484"); /* vor 0,0,0 */
|
||
|
|
signal(SIGILL, oldsig);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int X(have_simd_altivec)(void)
|
||
|
|
{
|
||
|
|
static int init = 0, res;
|
||
|
|
if (!init) {
|
||
|
|
res = really_have_altivec();
|
||
|
|
init = 1;
|
||
|
|
}
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|