1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*
* Copyright (c) 2003, 2007-8 Matteo Frigo
* Copyright (c) 2003, 2007-8 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "ifftw.h"
#include "simd.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 /* 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 RIGHT_CPU(void)
{
static int init = 0, res;
if (!init) {
res = really_have_altivec();
init = 1;
}
return res;
}
#endif
|
