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annotate src/cpuinfo/SDL_cpuinfo.c @ 743:96cd118791bf

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author Sam Lantinga <slouken@libsdl.org>
date Mon, 24 Nov 2003 00:20:48 +0000
parents 22dbf364c017
children 71ee03909f42
rev   line source
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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1 /*
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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4
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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28 /* CPU feature detection for SDL */
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29
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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30 #include "SDL.h"
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31 //#include "SDL_cpuinfo.h"
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32
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33 #define CPU_HAS_MMX 0x00000001
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34 #define CPU_HAS_3DNOW 0x00000002
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35 #define CPU_HAS_SSE 0x00000004
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36
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37 /* These functions come from SciTech's PM library */
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38 extern int CPU_haveMMX();
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39 extern int CPU_have3DNow();
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40 extern int CPU_haveSSE();
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41
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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42 static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;
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43
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44 static Uint32 SDL_GetCPUFeatures()
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45 {
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46 if ( SDL_CPUFeatures == 0xFFFFFFFF ) {
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47 SDL_CPUFeatures = 0;
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48 if ( CPU_haveMMX() ) {
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49 SDL_CPUFeatures |= CPU_HAS_MMX;
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50 }
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51 if ( CPU_have3DNow() ) {
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52 SDL_CPUFeatures |= CPU_HAS_3DNOW;
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53 }
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54 if ( CPU_haveSSE() ) {
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55 SDL_CPUFeatures |= CPU_HAS_SSE;
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56 }
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57 }
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58 return SDL_CPUFeatures;
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59 }
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60
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61 SDL_bool SDL_HasMMX()
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62 {
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63 if ( SDL_GetCPUFeatures() & CPU_HAS_MMX ) {
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64 return SDL_TRUE;
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65 }
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66 return SDL_FALSE;
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67 }
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68
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69 SDL_bool SDL_Has3DNow()
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70 {
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71 if ( SDL_GetCPUFeatures() & CPU_HAS_3DNOW ) {
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72 return SDL_TRUE;
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73 }
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74 return SDL_FALSE;
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75 }
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76
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77 SDL_bool SDL_HasSSE()
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78 {
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79 if ( SDL_GetCPUFeatures() & CPU_HAS_SSE ) {
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80 return SDL_TRUE;
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81 }
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82 return SDL_FALSE;
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83 }
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84
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85 #ifdef TEST_MAIN
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86
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87 #include <stdio.h>
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88
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89 int main()
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90 {
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91 printf("MMX: %d\n", SDL_HasMMX());
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92 printf("3DNow: %d\n", SDL_Has3DNow());
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93 printf("SSE: %d\n", SDL_HasSSE());
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94 }
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95
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96 #endif /* TEST_MAIN */