Mercurial > sdl-ios-xcode
annotate src/cpuinfo/SDL_cpuinfo.c @ 998:0e6627072f7a
Date: Wed, 24 Nov 2004 01:25:48 +0100
From: Stephane Marchesin
Subject: Re: [SDL] Problem compiling SDL 1.2.7
- there is a bug that was introduced in the kernel headers for 2.6.9
which is fixed in 2.6.10. This bug *will* byte when compiling the cdrom
subsystem. A patch that works around this bug is attached. Note that
users affected are not those running 2.6.9, but those using the 2.6.9
kernel headers for their system (i.e. whose libc is built against 2.6.9
headers).
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 30 Nov 2004 14:45:08 +0000 |
parents | b4b64bb88f2f |
children | 51a8702d8ecd |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga |
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4 |
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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 |
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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 |
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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 |
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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 |
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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 |
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28 /* CPU feature detection for SDL */ |
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29 |
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30 #ifdef unix /* FIXME: Better setjmp detection? */ |
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31 #define USE_SETJMP |
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32 #include <signal.h> |
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33 #include <setjmp.h> |
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34 #endif |
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35 |
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36 #include "SDL.h" |
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37 #include "SDL_cpuinfo.h" |
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38 |
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Date: Tue, 6 Jan 2004 12:42:19 +0100
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39 #ifdef MACOSX |
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40 #include <sys/sysctl.h> /* For AltiVec check */ |
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41 #endif |
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42 |
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43 #define CPU_HAS_RDTSC 0x00000001 |
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44 #define CPU_HAS_MMX 0x00000002 |
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45 #define CPU_HAS_MMXEXT 0x00000004 |
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46 #define CPU_HAS_3DNOW 0x00000010 |
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47 #define CPU_HAS_3DNOWEXT 0x00000020 |
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48 #define CPU_HAS_SSE 0x00000040 |
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49 #define CPU_HAS_SSE2 0x00000080 |
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50 #define CPU_HAS_ALTIVEC 0x00000100 |
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51 |
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52 #ifdef USE_SETJMP |
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53 /* This is the brute force way of detecting instruction sets... |
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54 the idea is borrowed from the libmpeg2 library - thanks! |
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55 */ |
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56 static jmp_buf jmpbuf; |
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57 static void illegal_instruction(int sig) |
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58 { |
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59 longjmp(jmpbuf, 1); |
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60 } |
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61 #endif // USE_SETJMP |
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62 |
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63 static __inline__ int CPU_haveCPUID() |
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64 { |
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65 int has_CPUID = 0; |
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66 #if defined(__GNUC__) && defined(i386) |
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67 __asm__ ( |
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68 " pushfl # Get original EFLAGS \n" |
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69 " popl %%eax \n" |
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70 " movl %%eax,%%ecx \n" |
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71 " xorl $0x200000,%%eax # Flip ID bit in EFLAGS \n" |
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72 " pushl %%eax # Save new EFLAGS value on stack \n" |
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73 " popfl # Replace current EFLAGS value \n" |
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74 " pushfl # Get new EFLAGS \n" |
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75 " popl %%eax # Store new EFLAGS in EAX \n" |
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76 " xorl %%ecx,%%eax # Can not toggle ID bit, \n" |
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77 " jz 1f # Processor=80486 \n" |
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78 " movl $1,%0 # We have CPUID support \n" |
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79 "1: \n" |
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80 : "=m" (has_CPUID) |
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81 : |
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82 : "%eax", "%ecx" |
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83 ); |
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84 #elif defined(__GNUC__) && defined(__x86_64__) |
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85 /* Technically, if this is being compiled under __x86_64__ then it has |
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86 CPUid by definition. But it's nice to be able to prove it. :) */ |
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87 __asm__ ( |
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88 " pushfq # Get original EFLAGS \n" |
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89 " popq %%rax \n" |
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90 " movq %%rax,%%rcx \n" |
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91 " xorl $0x200000,%%eax # Flip ID bit in EFLAGS \n" |
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92 " pushq %%rax # Save new EFLAGS value on stack \n" |
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93 " popfq # Replace current EFLAGS value \n" |
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94 " pushfq # Get new EFLAGS \n" |
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95 " popq %%rax # Store new EFLAGS in EAX \n" |
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96 " xorl %%ecx,%%eax # Can not toggle ID bit, \n" |
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97 " jz 1f # Processor=80486 \n" |
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98 " movl $1,%0 # We have CPUID support \n" |
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99 "1: \n" |
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100 : "=m" (has_CPUID) |
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101 : |
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102 : "%rax", "%rcx" |
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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 pushfd ; Get original EFLAGS |
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107 pop eax |
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108 mov ecx, eax |
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109 xor eax, 200000h ; Flip ID bit in EFLAGS |
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110 push eax ; Save new EFLAGS value on stack |
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111 popfd ; Replace current EFLAGS value |
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112 pushfd ; Get new EFLAGS |
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Greatly simplified the SDL CPU info code
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113 pop eax ; Store new EFLAGS in EAX |
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114 xor eax, ecx ; Can not toggle ID bit, |
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115 jz done ; Processor=80486 |
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116 mov has_CPUID,1 ; We have CPUID support |
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117 done: |
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118 } |
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119 #endif |
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120 return has_CPUID; |
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121 } |
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122 |
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123 static __inline__ int CPU_getCPUIDFeatures() |
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124 { |
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125 int features = 0; |
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126 #if defined(__GNUC__) && ( defined(i386) || defined(__x86_64__) ) |
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127 __asm__ ( |
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128 " movl %%ebx,%%edi\n" |
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129 " xorl %%eax,%%eax # Set up for CPUID instruction \n" |
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130 " cpuid # Get and save vendor ID \n" |
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131 " cmpl $1,%%eax # Make sure 1 is valid input for CPUID\n" |
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132 " jl 1f # We dont have the CPUID instruction\n" |
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133 " xorl %%eax,%%eax \n" |
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134 " incl %%eax \n" |
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135 " cpuid # Get family/model/stepping/features\n" |
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136 " movl %%edx,%0 \n" |
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137 "1: \n" |
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138 " movl %%edi,%%ebx\n" |
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*** empty log message ***
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139 : "=m" (features) |
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140 : |
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Date: Mon, 10 May 2004 10:17:46 -0400
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141 : "%eax", "%ecx", "%edx", "%edi" |
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142 ); |
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143 #elif defined(_MSC_VER) |
749
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Updated Visual C++ support
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144 __asm { |
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145 xor eax, eax ; Set up for CPUID instruction |
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146 cpuid ; Get and save vendor ID |
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147 cmp eax, 1 ; Make sure 1 is valid input for CPUID |
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148 jl done ; We dont have the CPUID instruction |
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149 xor eax, eax |
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150 inc eax |
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151 cpuid ; Get family/model/stepping/features |
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152 mov features, edx |
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153 done: |
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154 } |
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155 #endif |
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156 return features; |
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157 } |
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158 |
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159 static __inline__ int CPU_getCPUIDFeaturesExt() |
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Fixed bugs in CPU feature detection and added extended feature detection
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160 { |
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161 int features = 0; |
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Date: Tue, 30 Mar 2004 18:18:13 -0600
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162 #if defined(__GNUC__) && (defined(i386) || defined (__x86_64__) ) |
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163 __asm__ ( |
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164 " movl %%ebx,%%edi\n" |
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Fixed bugs in CPU feature detection and added extended feature detection
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165 " movl $0x80000000,%%eax # Query for extended functions \n" |
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Fixed bugs in CPU feature detection and added extended feature detection
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166 " cpuid # Get extended function limit \n" |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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167 " cmpl $0x80000001,%%eax \n" |
787
07760c8854d1
Date: Sat, 24 Jan 2004 14:49:58 +0100
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168 " jl 1f # Nope, we dont have function 800000001h\n" |
785
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Fixed bugs in CPU feature detection and added extended feature detection
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169 " movl $0x80000001,%%eax # Setup extended function 800000001h\n" |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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170 " cpuid # and get the information \n" |
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Fixed bugs in CPU feature detection and added extended feature detection
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171 " movl %%edx,%0 \n" |
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Fixed bugs in CPU feature detection and added extended feature detection
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172 "1: \n" |
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Fixed bugs in CPU feature detection and added extended feature detection
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173 " movl %%edi,%%ebx\n" |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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174 : "=m" (features) |
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Fixed bugs in CPU feature detection and added extended feature detection
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175 : |
887
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Date: Mon, 10 May 2004 10:17:46 -0400
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176 : "%eax", "%ecx", "%edx", "%edi" |
785
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
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|
177 ); |
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Fixed bugs in CPU feature detection and added extended feature detection
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|
178 #elif defined(_MSC_VER) |
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Fixed bugs in CPU feature detection and added extended feature detection
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|
179 __asm { |
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Fixed bugs in CPU feature detection and added extended feature detection
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|
180 mov eax,80000000h ; Query for extended functions |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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|
181 cpuid ; Get extended function limit |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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|
182 cmp eax,80000001h |
787
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Date: Sat, 24 Jan 2004 14:49:58 +0100
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183 jl done ; Nope, we dont have function 800000001h |
785
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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|
184 mov eax,80000001h ; Setup extended function 800000001h |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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185 cpuid ; and get the information |
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Fixed bugs in CPU feature detection and added extended feature detection
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|
186 mov features,edx |
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Fixed bugs in CPU feature detection and added extended feature detection
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|
187 done: |
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Fixed bugs in CPU feature detection and added extended feature detection
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|
188 } |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
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|
189 #endif |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
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|
190 return features; |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
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diff
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|
191 } |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
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|
192 |
745
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Greatly simplified the SDL CPU info code
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193 static __inline__ int CPU_haveRDTSC() |
71ee03909f42
Greatly simplified the SDL CPU info code
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194 { |
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Greatly simplified the SDL CPU info code
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195 if ( CPU_haveCPUID() ) { |
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Greatly simplified the SDL CPU info code
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|
196 return (CPU_getCPUIDFeatures() & 0x00000010); |
71ee03909f42
Greatly simplified the SDL CPU info code
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|
197 } |
71ee03909f42
Greatly simplified the SDL CPU info code
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198 return 0; |
71ee03909f42
Greatly simplified the SDL CPU info code
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diff
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|
199 } |
739
22dbf364c017
Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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|
200 |
745
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Greatly simplified the SDL CPU info code
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|
201 static __inline__ int CPU_haveMMX() |
71ee03909f42
Greatly simplified the SDL CPU info code
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|
202 { |
71ee03909f42
Greatly simplified the SDL CPU info code
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|
203 if ( CPU_haveCPUID() ) { |
71ee03909f42
Greatly simplified the SDL CPU info code
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|
204 return (CPU_getCPUIDFeatures() & 0x00800000); |
71ee03909f42
Greatly simplified the SDL CPU info code
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|
205 } |
71ee03909f42
Greatly simplified the SDL CPU info code
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|
206 return 0; |
71ee03909f42
Greatly simplified the SDL CPU info code
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diff
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|
207 } |
71ee03909f42
Greatly simplified the SDL CPU info code
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diff
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|
208 |
785
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
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|
209 static __inline__ int CPU_haveMMXExt() |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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diff
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|
210 { |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
211 if ( CPU_haveCPUID() ) { |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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|
212 return (CPU_getCPUIDFeaturesExt() & 0x00400000); |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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|
213 } |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents:
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|
214 return 0; |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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diff
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|
215 } |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents:
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|
216 |
745
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Greatly simplified the SDL CPU info code
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|
217 static __inline__ int CPU_have3DNow() |
71ee03909f42
Greatly simplified the SDL CPU info code
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|
218 { |
785
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
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|
219 if ( CPU_haveCPUID() ) { |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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|
220 return (CPU_getCPUIDFeaturesExt() & 0x80000000); |
747
da36f59485da
Check for CPUID before checking for 3DNow!
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|
221 } |
785
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents:
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|
222 return 0; |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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parents:
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diff
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|
223 } |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
224 |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
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|
225 static __inline__ int CPU_have3DNowExt() |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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|
226 { |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents:
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|
227 if ( CPU_haveCPUID() ) { |
ca06a994f03c
Fixed bugs in CPU feature detection and added extended feature detection
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|
228 return (CPU_getCPUIDFeaturesExt() & 0x40000000); |
745
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Greatly simplified the SDL CPU info code
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|
229 } |
785
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Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents:
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|
230 return 0; |
745
71ee03909f42
Greatly simplified the SDL CPU info code
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|
231 } |
71ee03909f42
Greatly simplified the SDL CPU info code
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|
232 |
71ee03909f42
Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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233 static __inline__ int CPU_haveSSE() |
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234 { |
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235 if ( CPU_haveCPUID() ) { |
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236 return (CPU_getCPUIDFeatures() & 0x02000000); |
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237 } |
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238 return 0; |
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239 } |
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240 |
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241 static __inline__ int CPU_haveSSE2() |
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242 { |
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243 if ( CPU_haveCPUID() ) { |
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244 return (CPU_getCPUIDFeatures() & 0x04000000); |
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245 } |
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246 return 0; |
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247 } |
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248 |
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249 static __inline__ int CPU_haveAltiVec() |
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250 { |
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251 volatile int altivec = 0; |
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252 #ifdef MACOSX |
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253 int selectors[2] = { CTL_HW, HW_VECTORUNIT }; |
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254 int hasVectorUnit = 0; |
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255 size_t length = sizeof(hasVectorUnit); |
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256 int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0); |
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257 if( 0 == error ) |
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258 altivec = (hasVectorUnit != 0); |
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259 #elif defined(USE_SETJMP) && defined(GCC_ALTIVEC) |
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260 void (*handler)(int sig); |
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261 handler = signal(SIGILL, illegal_instruction); |
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262 if ( setjmp(jmpbuf) == 0 ) { |
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263 asm volatile ("mtspr 256, %0\n\t" |
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264 "vand %%v0, %%v0, %%v0" |
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265 : |
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266 : "r" (-1)); |
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267 altivec = 1; |
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268 } |
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269 signal(SIGILL, handler); |
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270 #endif |
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271 return altivec; |
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272 } |
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273 |
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274 static Uint32 SDL_CPUFeatures = 0xFFFFFFFF; |
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275 |
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276 static Uint32 SDL_GetCPUFeatures() |
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277 { |
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278 if ( SDL_CPUFeatures == 0xFFFFFFFF ) { |
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279 SDL_CPUFeatures = 0; |
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280 if ( CPU_haveRDTSC() ) { |
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281 SDL_CPUFeatures |= CPU_HAS_RDTSC; |
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282 } |
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283 if ( CPU_haveMMX() ) { |
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284 SDL_CPUFeatures |= CPU_HAS_MMX; |
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285 } |
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286 if ( CPU_haveMMXExt() ) { |
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287 SDL_CPUFeatures |= CPU_HAS_MMXEXT; |
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288 } |
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289 if ( CPU_have3DNow() ) { |
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290 SDL_CPUFeatures |= CPU_HAS_3DNOW; |
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291 } |
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292 if ( CPU_have3DNowExt() ) { |
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293 SDL_CPUFeatures |= CPU_HAS_3DNOWEXT; |
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294 } |
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295 if ( CPU_haveSSE() ) { |
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296 SDL_CPUFeatures |= CPU_HAS_SSE; |
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297 } |
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298 if ( CPU_haveSSE2() ) { |
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299 SDL_CPUFeatures |= CPU_HAS_SSE2; |
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300 } |
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301 if ( CPU_haveAltiVec() ) { |
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302 SDL_CPUFeatures |= CPU_HAS_ALTIVEC; |
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303 } |
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304 } |
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305 return SDL_CPUFeatures; |
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306 } |
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307 |
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308 SDL_bool SDL_HasRDTSC() |
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309 { |
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310 if ( SDL_GetCPUFeatures() & CPU_HAS_RDTSC ) { |
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311 return SDL_TRUE; |
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312 } |
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313 return SDL_FALSE; |
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314 } |
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315 |
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316 SDL_bool SDL_HasMMX() |
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317 { |
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318 if ( SDL_GetCPUFeatures() & CPU_HAS_MMX ) { |
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319 return SDL_TRUE; |
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320 } |
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321 return SDL_FALSE; |
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322 } |
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323 |
804
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324 SDL_bool SDL_HasMMXExt() |
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325 { |
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326 if ( SDL_GetCPUFeatures() & CPU_HAS_MMXEXT ) { |
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327 return SDL_TRUE; |
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328 } |
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329 return SDL_FALSE; |
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330 } |
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331 |
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332 SDL_bool SDL_Has3DNow() |
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333 { |
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334 if ( SDL_GetCPUFeatures() & CPU_HAS_3DNOW ) { |
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335 return SDL_TRUE; |
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336 } |
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337 return SDL_FALSE; |
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338 } |
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339 |
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340 SDL_bool SDL_Has3DNowExt() |
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341 { |
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342 if ( SDL_GetCPUFeatures() & CPU_HAS_3DNOWEXT ) { |
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343 return SDL_TRUE; |
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344 } |
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345 return SDL_FALSE; |
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346 } |
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347 |
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348 SDL_bool SDL_HasSSE() |
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349 { |
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350 if ( SDL_GetCPUFeatures() & CPU_HAS_SSE ) { |
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351 return SDL_TRUE; |
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352 } |
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353 return SDL_FALSE; |
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354 } |
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355 |
804
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356 SDL_bool SDL_HasSSE2() |
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357 { |
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358 if ( SDL_GetCPUFeatures() & CPU_HAS_SSE2 ) { |
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359 return SDL_TRUE; |
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360 } |
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361 return SDL_FALSE; |
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362 } |
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363 |
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364 SDL_bool SDL_HasAltiVec() |
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365 { |
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366 if ( SDL_GetCPUFeatures() & CPU_HAS_ALTIVEC ) { |
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367 return SDL_TRUE; |
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368 } |
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369 return SDL_FALSE; |
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370 } |
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371 |
739
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372 #ifdef TEST_MAIN |
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373 |
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374 #include <stdio.h> |
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375 |
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376 int main() |
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377 { |
778
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378 printf("RDTSC: %d\n", SDL_HasRDTSC()); |
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379 printf("MMX: %d\n", SDL_HasMMX()); |
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380 printf("MMXExt: %d\n", SDL_HasMMXExt()); |
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381 printf("3DNow: %d\n", SDL_Has3DNow()); |
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382 printf("3DNowExt: %d\n", SDL_Has3DNowExt()); |
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383 printf("SSE: %d\n", SDL_HasSSE()); |
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384 printf("SSE2: %d\n", SDL_HasSSE2()); |
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385 printf("AltiVec: %d\n", SDL_HasAltiVec()); |
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386 return 0; |
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387 } |
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388 |
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389 #endif /* TEST_MAIN */ |