src/cpuinfo/SDL_cpuinfo.c
changeset 739 22dbf364c017
child 745 71ee03909f42
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cpuinfo/SDL_cpuinfo.c	Tue Nov 18 01:27:06 2003 +0000
@@ -0,0 +1,96 @@
+/*
+    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 */