1 |
/*************************************************************************** |
2 |
* * |
3 |
* LinuxSampler - modular, streaming capable sampler * |
4 |
* * |
5 |
* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
6 |
* * |
7 |
* This program is free software; you can redistribute it and/or modify * |
8 |
* it under the terms of the GNU General Public License as published by * |
9 |
* the Free Software Foundation; either version 2 of the License, or * |
10 |
* (at your option) any later version. * |
11 |
* * |
12 |
* This program is distributed in the hope that it will be useful, * |
13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
15 |
* GNU General Public License for more details. * |
16 |
* * |
17 |
* You should have received a copy of the GNU General Public License * |
18 |
* along with this program; if not, write to the Free Software * |
19 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
20 |
* MA 02111-1307 USA * |
21 |
***************************************************************************/ |
22 |
|
23 |
#include "Features.h" |
24 |
|
25 |
#if ARCH_X86 |
26 |
bool Features::bMMX(false); |
27 |
bool Features::bSSE(false); |
28 |
|
29 |
unsigned int edx = 0; |
30 |
unsigned int eax_temp = 0; |
31 |
unsigned int ebx_temp = 0; |
32 |
unsigned int ecx_temp = 0; |
33 |
unsigned int edx_temp = 0; |
34 |
|
35 |
void Features::detect() { |
36 |
// we store and restore all registers modified by 'cpuid' the old fashioned way |
37 |
__asm__ __volatile__ ("mov %eax,eax_temp\n\t" |
38 |
"mov %ebx,ebx_temp\n\t" |
39 |
"mov %ecx,ecx_temp\n\t" |
40 |
"mov %edx,edx_temp\n\t" |
41 |
"mov $1,%eax\n\t" |
42 |
"cpuid\n\t" |
43 |
"mov %edx,edx\n\t" |
44 |
"mov eax_temp,%eax\n\t" |
45 |
"mov ebx_temp,%ebx\n\t" |
46 |
"mov ecx_temp,%ecx\n\t" |
47 |
"mov edx_temp,%edx\n\t" |
48 |
); |
49 |
bMMX = (edx & 0x00800000); |
50 |
bSSE = (edx & 0x02000000); |
51 |
} |
52 |
#else |
53 |
void Features::detect() {} |
54 |
#endif // ARCH_X86 |