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annotate src/cpuinfo/SDL_cpuinfo.c @ 747:da36f59485da

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Check for CPUID before checking for 3DNow!
author Sam Lantinga <slouken@libsdl.org>
date Mon, 24 Nov 2003 09:30:14 +0000
parents 71ee03909f42
children 06cdd106d61c
rev   line source
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
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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
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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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
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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6 modify it under the terms of the GNU Library General Public
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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7 License as published by the Free Software Foundation; either
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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8 version 2 of the License, or (at your option) any later version.
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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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,
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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13 Library General Public License for more details.
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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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
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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16 License along with this library; if not, write to the Free
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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18
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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19 Sam Lantinga
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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20 slouken@libsdl.org
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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21 */
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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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_RDTSC 0x00000001
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34 #define CPU_HAS_MMX 0x00000002
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35 #define CPU_HAS_3DNOW 0x00000004
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36 #define CPU_HAS_SSE 0x00000008
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37
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38 static __inline__ int CPU_haveCPUID()
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39 {
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40 int has_CPUID = 0;
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41 #if defined(__GNUC__) && defined(i386)
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42 __asm__ (
71ee03909f42 Greatly simplified the SDL CPU info code
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43 "push %%ecx\n"
71ee03909f42 Greatly simplified the SDL CPU info code
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44 " pushfl # Get original EFLAGS \n"
71ee03909f42 Greatly simplified the SDL CPU info code
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45 " popl %%eax \n"
71ee03909f42 Greatly simplified the SDL CPU info code
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46 " movl %%eax,%%ecx \n"
71ee03909f42 Greatly simplified the SDL CPU info code
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47 " xorl $0x200000,%%eax # Flip ID bit in EFLAGS \n"
71ee03909f42 Greatly simplified the SDL CPU info code
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48 " pushl %%eax # Save new EFLAGS value on stack \n"
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49 " popfl # Replace current EFLAGS value \n"
71ee03909f42 Greatly simplified the SDL CPU info code
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50 " pushfl # Get new EFLAGS \n"
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51 " popl %%eax # Store new EFLAGS in EAX \n"
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52 " xorl %%ecx,%%eax # Can not toggle ID bit, \n"
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53 " jz 1f # Processor=80486 \n"
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54 " movl $1,%0 # We have CPUID support \n"
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55 "1: \n"
71ee03909f42 Greatly simplified the SDL CPU info code
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56 "pop %%ecx\n"
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57 : "=r" (has_CPUID)
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58 :
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59 : "%eax", "%ecx"
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60 );
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61 #elif defined(_MSC_VER)
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62 __asm__ {
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63 pushfd ; Get original EFLAGS
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64 pop eax
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65 mov ecx, eax
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66 xor eax, 200000h ; Flip ID bit in EFLAGS
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67 push eax ; Save new EFLAGS value on stack
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68 popfd ; Replace current EFLAGS value
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69 pushfd ; Get new EFLAGS
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70 pop eax ; Store new EFLAGS in EAX
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71 xor eax, ecx ; Can not toggle ID bit,
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72 jz done ; Processor=80486
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73 mov has_CPUID,1 ; We have CPUID support
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74 done:
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75 }
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76 #endif
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77 return has_CPUID;
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78 }
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79
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80 static __inline__ int CPU_getCPUIDFeatures()
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81 {
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82 int features = 0;
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83 #if defined(__GNUC__) && defined(i386)
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84 __asm__ (
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85 "push %%ebx\n"
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86 "push %%ecx\n"
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87 "push %%edx\n"
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88 " xorl %%eax,%%eax # Set up for CPUID instruction \n"
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89 " cpuid # Get and save vendor ID \n"
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90 " cmpl $1,%%eax # Make sure 1 is valid input for CPUID\n"
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91 " jl 1f # We dont have the CPUID instruction\n"
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92 " xorl %%eax,%%eax \n"
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93 " incl %%eax \n"
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94 " cpuid # Get family/model/stepping/features\n"
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95 " movl %%edx,%0 \n"
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96 "1: \n"
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97 "pop %%edx\n"
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98 "pop %%ecx\n"
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99 "pop %%ebx\n"
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100 : "=r" (features)
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101 :
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102 : "%eax", "%ebx", "%ecx", "%edx"
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103 );
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104 #elif defined(_MSC_VER)
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105 __asm__ {
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106 xor eax, eax ; Set up for CPUID instruction
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107 cpuid ; Get and save vendor ID
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108 cmp eax, 1 ; Make sure 1 is valid input for CPUID
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109 jl done ; We dont have the CPUID instruction
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110 xor eax, eax
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111 inc eax
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112 cpuid ; Get family/model/stepping/features
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113 mov features, edx
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114 done:
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115 }
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116 #endif
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117 return features;
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118 }
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119
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120 static __inline__ int CPU_haveRDTSC()
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121 {
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122 if ( CPU_haveCPUID() ) {
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123 return (CPU_getCPUIDFeatures() & 0x00000010);
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124 }
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125 return 0;
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126 }
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127
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128 static __inline__ int CPU_haveMMX()
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129 {
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130 if ( CPU_haveCPUID() ) {
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131 return (CPU_getCPUIDFeatures() & 0x00800000);
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132 }
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133 return 0;
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134 }
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135
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136 static __inline__ int CPU_have3DNow()
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137 {
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138 int has_3DNow = 0;
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139 if ( !CPU_haveCPUID() ) {
da36f59485da Check for CPUID before checking for 3DNow!
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140 return 0;
da36f59485da Check for CPUID before checking for 3DNow!
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141 }
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142 #if defined(__GNUC__) && defined(i386)
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143 __asm__ (
71ee03909f42 Greatly simplified the SDL CPU info code
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144 "push %%ebx\n"
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145 "push %%ecx\n"
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146 "push %%edx\n"
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147 " movl $0x80000000,%%eax # Query for extended functions \n"
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148 " cpuid # Get extended function limit \n"
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149 " cmpl $0x80000001,%%eax \n"
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150 " jbe 1f # Nope, we dont have function 800000001h\n"
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151 " movl $0x80000001,%%eax # Setup extended function 800000001h\n"
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152 " cpuid # and get the information \n"
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153 " testl $0x80000000,%%edx # Bit 31 is set if 3DNow! present \n"
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154 " jz 1f # Nope, we dont have 3DNow support\n"
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155 " movl $1,%0 # Yep, we have 3DNow! support! \n"
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156 "1: \n"
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157 "pop %%edx\n"
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158 "pop %%ecx\n"
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159 "pop %%ebx\n"
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160 : "=r" (has_3DNow)
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161 :
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162 : "%eax", "%ebx", "%ecx", "%edx"
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163 );
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164 #elif defined(_MSC_VER)
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165 __asm__ {
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166 mov eax,80000000h ; Query for extended functions
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167 cpuid ; Get extended function limit
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168 cmp eax,80000001h
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169 jbe done ; Nope, we dont have function 800000001h
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170 mov eax,80000001h ; Setup extended function 800000001h
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171 cpuid ; and get the information
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172 test edx,80000000h ; Bit 31 is set if 3DNow! present
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173 jz done ; Nope, we dont have 3DNow support
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174 mov has_3DNow,1 ; Yep, we have 3DNow! support!
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175 done:
71ee03909f42 Greatly simplified the SDL CPU info code
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176 }
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177 #endif
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178 return has_3DNow;
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179 }
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180
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181 static __inline__ int CPU_haveSSE()
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182 {
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183 if ( CPU_haveCPUID() ) {
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184 return (CPU_getCPUIDFeatures() & 0x02000000);
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185 }
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186 return 0;
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187 }
739
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188
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189 static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;
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190
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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191 static Uint32 SDL_GetCPUFeatures()
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192 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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193 if ( SDL_CPUFeatures == 0xFFFFFFFF ) {
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194 SDL_CPUFeatures = 0;
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195 if ( CPU_haveRDTSC() ) {
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196 SDL_CPUFeatures |= CPU_HAS_RDTSC;
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197 }
739
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198 if ( CPU_haveMMX() ) {
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199 SDL_CPUFeatures |= CPU_HAS_MMX;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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200 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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201 if ( CPU_have3DNow() ) {
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202 SDL_CPUFeatures |= CPU_HAS_3DNOW;
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203 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
204 if ( CPU_haveSSE() ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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205 SDL_CPUFeatures |= CPU_HAS_SSE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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206 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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207 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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208 return SDL_CPUFeatures;
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209 }
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210
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211 SDL_bool SDL_HasRDTSC()
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212 {
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213 if ( SDL_GetCPUFeatures() & CPU_HAS_RDTSC ) {
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214 return SDL_TRUE;
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215 }
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216 return SDL_FALSE;
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217 }
71ee03909f42 Greatly simplified the SDL CPU info code
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218
739
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219 SDL_bool SDL_HasMMX()
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
220 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
221 if ( SDL_GetCPUFeatures() & CPU_HAS_MMX ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
222 return SDL_TRUE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
223 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
224 return SDL_FALSE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
225 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
226
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
227 SDL_bool SDL_Has3DNow()
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
228 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
229 if ( SDL_GetCPUFeatures() & CPU_HAS_3DNOW ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
230 return SDL_TRUE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
231 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
232 return SDL_FALSE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
233 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
234
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
235 SDL_bool SDL_HasSSE()
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
236 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
237 if ( SDL_GetCPUFeatures() & CPU_HAS_SSE ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
238 return SDL_TRUE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
239 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
240 return SDL_FALSE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
241 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
242
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
243 #ifdef TEST_MAIN
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
244
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
245 #include <stdio.h>
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
246
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
247 int main()
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
248 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
249 printf("MMX: %d\n", SDL_HasMMX());
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
250 printf("3DNow: %d\n", SDL_Has3DNow());
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
251 printf("SSE: %d\n", SDL_HasSSE());
745
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252 return 0;
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
253 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
254
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
255 #endif /* TEST_MAIN */