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comparison src/cpuinfo/SDL_cpuinfo.c @ 739:22dbf364c017

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Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
author Sam Lantinga <slouken@libsdl.org>
date Tue, 18 Nov 2003 01:27:06 +0000
parents
children 71ee03909f42
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738:82b85b731fe3 739:22dbf364c017
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /* CPU feature detection for SDL */
29
30 #include "SDL.h"
31 //#include "SDL_cpuinfo.h"
32
33 #define CPU_HAS_MMX 0x00000001
34 #define CPU_HAS_3DNOW 0x00000002
35 #define CPU_HAS_SSE 0x00000004
36
37 /* These functions come from SciTech's PM library */
38 extern int CPU_haveMMX();
39 extern int CPU_have3DNow();
40 extern int CPU_haveSSE();
41
42 static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;
43
44 static Uint32 SDL_GetCPUFeatures()
45 {
46 if ( SDL_CPUFeatures == 0xFFFFFFFF ) {
47 SDL_CPUFeatures = 0;
48 if ( CPU_haveMMX() ) {
49 SDL_CPUFeatures |= CPU_HAS_MMX;
50 }
51 if ( CPU_have3DNow() ) {
52 SDL_CPUFeatures |= CPU_HAS_3DNOW;
53 }
54 if ( CPU_haveSSE() ) {
55 SDL_CPUFeatures |= CPU_HAS_SSE;
56 }
57 }
58 return SDL_CPUFeatures;
59 }
60
61 SDL_bool SDL_HasMMX()
62 {
63 if ( SDL_GetCPUFeatures() & CPU_HAS_MMX ) {
64 return SDL_TRUE;
65 }
66 return SDL_FALSE;
67 }
68
69 SDL_bool SDL_Has3DNow()
70 {
71 if ( SDL_GetCPUFeatures() & CPU_HAS_3DNOW ) {
72 return SDL_TRUE;
73 }
74 return SDL_FALSE;
75 }
76
77 SDL_bool SDL_HasSSE()
78 {
79 if ( SDL_GetCPUFeatures() & CPU_HAS_SSE ) {
80 return SDL_TRUE;
81 }
82 return SDL_FALSE;
83 }
84
85 #ifdef TEST_MAIN
86
87 #include <stdio.h>
88
89 int main()
90 {
91 printf("MMX: %d\n", SDL_HasMMX());
92 printf("3DNow: %d\n", SDL_Has3DNow());
93 printf("SSE: %d\n", SDL_HasSSE());
94 }
95
96 #endif /* TEST_MAIN */