|
Chris@82
|
1 /*
|
|
Chris@82
|
2 * Copyright (c) 2003, 2007-14 Matteo Frigo
|
|
Chris@82
|
3 * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
|
Chris@82
|
4 *
|
|
Chris@82
|
5 * VSX SIMD implementation added 2015 Erik Lindahl.
|
|
Chris@82
|
6 * Erik Lindahl places his modifications in the public domain.
|
|
Chris@82
|
7 *
|
|
Chris@82
|
8 * This program is free software; you can redistribute it and/or modify
|
|
Chris@82
|
9 * it under the terms of the GNU General Public License as published by
|
|
Chris@82
|
10 * the Free Software Foundation; either version 2 of the License, or
|
|
Chris@82
|
11 * (at your option) any later version.
|
|
Chris@82
|
12 *
|
|
Chris@82
|
13 * This program is distributed in the hope that it will be useful,
|
|
Chris@82
|
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Chris@82
|
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
Chris@82
|
16 * GNU General Public License for more details.
|
|
Chris@82
|
17 *
|
|
Chris@82
|
18 * You should have received a copy of the GNU General Public License
|
|
Chris@82
|
19 * along with this program; if not, write to the Free Software
|
|
Chris@82
|
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
Chris@82
|
21 *
|
|
Chris@82
|
22 */
|
|
Chris@82
|
23
|
|
Chris@82
|
24
|
|
Chris@82
|
25 #include "kernel/ifftw.h"
|
|
Chris@82
|
26
|
|
Chris@82
|
27 #if HAVE_VSX
|
|
Chris@82
|
28
|
|
Chris@82
|
29 #if HAVE_SYS_SYSCTL_H
|
|
Chris@82
|
30 # include <sys/sysctl.h>
|
|
Chris@82
|
31 #endif
|
|
Chris@82
|
32
|
|
Chris@82
|
33 #include <signal.h>
|
|
Chris@82
|
34 #include <setjmp.h>
|
|
Chris@82
|
35
|
|
Chris@82
|
36 static jmp_buf jb;
|
|
Chris@82
|
37
|
|
Chris@82
|
38 static void sighandler(int x)
|
|
Chris@82
|
39 {
|
|
Chris@82
|
40 longjmp(jb, 1);
|
|
Chris@82
|
41 }
|
|
Chris@82
|
42
|
|
Chris@82
|
43 static int really_have_vsx(void)
|
|
Chris@82
|
44 {
|
|
Chris@82
|
45 void (*oldsig)(int);
|
|
Chris@82
|
46 oldsig = signal(SIGILL, sighandler);
|
|
Chris@82
|
47 if (setjmp(jb)) {
|
|
Chris@82
|
48 signal(SIGILL, oldsig);
|
|
Chris@82
|
49 return 0;
|
|
Chris@82
|
50 } else {
|
|
Chris@82
|
51 float mem[2];
|
|
Chris@82
|
52 __asm__ __volatile__ ("stxsdx 0,0,%0" :: "r" (mem) : "memory" );
|
|
Chris@82
|
53 signal(SIGILL, oldsig);
|
|
Chris@82
|
54 return 1;
|
|
Chris@82
|
55 }
|
|
Chris@82
|
56 return 0;
|
|
Chris@82
|
57 }
|
|
Chris@82
|
58
|
|
Chris@82
|
59 int X(have_simd_vsx)(void)
|
|
Chris@82
|
60 {
|
|
Chris@82
|
61 static int init = 0, res;
|
|
Chris@82
|
62 if (!init) {
|
|
Chris@82
|
63 res = really_have_vsx();
|
|
Chris@82
|
64 init = 1;
|
|
Chris@82
|
65 }
|
|
Chris@82
|
66 return res;
|
|
Chris@82
|
67 }
|
|
Chris@82
|
68
|
|
Chris@82
|
69 #endif
|
