src/common/Features.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *                                                                         *
 *   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 "Features.h"

#if ARCH_X86
bool Features::bMMX(false);
bool Features::bSSE(false);
bool Features::bSSE2(false);

unsigned int edx = 0;
unsigned int eax_temp = 0;
unsigned int ebx_temp = 0;
unsigned int ecx_temp = 0;
unsigned int edx_temp = 0;

void Features::detect() {
    // we store and restore all registers modified by 'cpuid' the old fashioned way
    __asm__ __volatile__ ("mov %eax,eax_temp\n\t"
                          "mov %ebx,ebx_temp\n\t"
                          "mov %ecx,ecx_temp\n\t"
                          "mov %edx,edx_temp\n\t"
                          "mov $1,%eax\n\t"
                          "cpuid\n\t"
                          "mov %edx,edx\n\t"
                          "mov eax_temp,%eax\n\t"
                          "mov ebx_temp,%ebx\n\t"
                          "mov ecx_temp,%ecx\n\t"
                          "mov edx_temp,%edx\n\t"
                         );
    bMMX = (edx & 0x00800000);
    bSSE = (edx & 0x02000000);
    bSSE2 = (edx & 0x04000000);
}
#else
void Features::detect() {}
#endif // ARCH_X86
1	schoenebeck	320	/***************************************************************************
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	persson	425	bool Features::bSSE2(false);
29	schoenebeck	320
30			unsigned int edx = 0;
31			unsigned int eax_temp = 0;
32			unsigned int ebx_temp = 0;
33			unsigned int ecx_temp = 0;
34			unsigned int edx_temp = 0;
35
36			void Features::detect() {
37			// we store and restore all registers modified by 'cpuid' the old fashioned way
38			__asm__ __volatile__ ("mov %eax,eax_temp\n\t"
39			"mov %ebx,ebx_temp\n\t"
40			"mov %ecx,ecx_temp\n\t"
41			"mov %edx,edx_temp\n\t"
42			"mov $1,%eax\n\t"
43			"cpuid\n\t"
44			"mov %edx,edx\n\t"
45			"mov eax_temp,%eax\n\t"
46			"mov ebx_temp,%ebx\n\t"
47			"mov ecx_temp,%ecx\n\t"
48			"mov edx_temp,%edx\n\t"
49			);
50			bMMX = (edx & 0x00800000);
51			bSSE = (edx & 0x02000000);
52	persson	425	bSSE2 = (edx & 0x04000000);
53	schoenebeck	320	}
54	schoenebeck	361	#else
55			void Features::detect() {}
56	schoenebeck	320	#endif // ARCH_X86