/*

    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 */