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SDL_cpuinfo.c
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SDL_cpuinfo.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@libsdl.org
*/
#ifdef SAVE_RCSID
static char rcsid =
"@(#) $Id$";
#endif
/* CPU feature detection for SDL */
#include "SDL.h"
//#include "SDL_cpuinfo.h"
#define CPU_HAS_MMX 0x00000001
#define CPU_HAS_3DNOW 0x00000002
#define CPU_HAS_SSE 0x00000004
/* These functions come from SciTech's PM library */
extern int CPU_haveMMX();
extern int CPU_have3DNow();
extern int CPU_haveSSE();
static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;
static Uint32 SDL_GetCPUFeatures()
{
if ( SDL_CPUFeatures == 0xFFFFFFFF ) {
SDL_CPUFeatures = 0;
if ( CPU_haveMMX() ) {
SDL_CPUFeatures |= CPU_HAS_MMX;
}
if ( CPU_have3DNow() ) {
SDL_CPUFeatures |= CPU_HAS_3DNOW;
}
if ( CPU_haveSSE() ) {
SDL_CPUFeatures |= CPU_HAS_SSE;
}
}
return SDL_CPUFeatures;
}
SDL_bool SDL_HasMMX()
{
if ( SDL_GetCPUFeatures() & CPU_HAS_MMX ) {
return SDL_TRUE;
}
return SDL_FALSE;
}
SDL_bool SDL_Has3DNow()
{
if ( SDL_GetCPUFeatures() & CPU_HAS_3DNOW ) {
return SDL_TRUE;
}
return SDL_FALSE;
}
SDL_bool SDL_HasSSE()
{
if ( SDL_GetCPUFeatures() & CPU_HAS_SSE ) {
return SDL_TRUE;
}
return SDL_FALSE;
}
#ifdef TEST_MAIN
#include <stdio.h>
int main()
{
printf("MMX: %d\n", SDL_HasMMX());
printf("3DNow: %d\n", SDL_Has3DNow());
printf("SSE: %d\n", SDL_HasSSE());
}
#endif /* TEST_MAIN */