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annotate src/cpuinfo/SDL_cpuinfo.c @ 779:68c8da837fc0

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Date: Tue, 6 Jan 2004 21:54:02 +0100 From: Max Horn Subject: Auto hide mouse & other changes the attached bug adds the auto-hide-mouse feature I talked about earlier. Turned out it was a lot simpler than I thought, simply by using our existing code :-). I actually spent much more time on fixing various bugs in the code and correcting (IMO) some behavior (although, due to the lack of real specs for SDL, it's probably arguable what 'correct' means...). * adds auto (un)hiding of mouse depending on whether it is in- or outside the game window * computation of course coordinates is correct now (it often and reproducible got out of sync with the old code, since the NSEvent window was in some cases *not* our window anymore, so locationInWindow returned wrong results) * added a method which at any time returns the mouse coords, relative to our window * fixed handling of lost/gain input/mouse/app focus "events"
author Sam Lantinga <slouken@libsdl.org>
date Wed, 07 Jan 2004 15:01:51 +0000
parents 8ac3f46f9d09
children a2dde6aff60e
rev   line source
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22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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1 /*
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2 SDL - Simple DirectMedia Layer
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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
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.
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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
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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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 #include "SDL.h"
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31 #include "SDL_cpuinfo.h"
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32
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8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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33 #ifdef MACOSX
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34 #include <sys/sysctl.h> /* For AltiVec check */
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35 #endif
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36
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37 #define CPU_HAS_RDTSC 0x00000001
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38 #define CPU_HAS_MMX 0x00000002
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39 #define CPU_HAS_3DNOW 0x00000004
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40 #define CPU_HAS_SSE 0x00000008
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8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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41 #define CPU_HAS_ALTIVEC 0x00000010
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42
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43 static __inline__ int CPU_haveCPUID()
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44 {
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45 int has_CPUID = 0;
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46 #if defined(__GNUC__) && defined(i386)
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47 __asm__ (
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48 "push %%ecx\n"
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49 " pushfl # Get original EFLAGS \n"
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50 " popl %%eax \n"
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51 " movl %%eax,%%ecx \n"
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52 " xorl $0x200000,%%eax # Flip ID bit in EFLAGS \n"
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53 " pushl %%eax # Save new EFLAGS value on stack \n"
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54 " popfl # Replace current EFLAGS value \n"
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55 " pushfl # Get new EFLAGS \n"
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56 " popl %%eax # Store new EFLAGS in EAX \n"
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57 " xorl %%ecx,%%eax # Can not toggle ID bit, \n"
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58 " jz 1f # Processor=80486 \n"
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59 " movl $1,%0 # We have CPUID support \n"
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60 "1: \n"
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61 "pop %%ecx\n"
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62 : "=r" (has_CPUID)
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63 :
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64 : "%eax", "%ecx"
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65 );
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66 #elif defined(_MSC_VER)
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67 __asm {
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68 pushfd ; Get original EFLAGS
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69 pop eax
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70 mov ecx, eax
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71 xor eax, 200000h ; Flip ID bit in EFLAGS
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72 push eax ; Save new EFLAGS value on stack
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73 popfd ; Replace current EFLAGS value
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74 pushfd ; Get new EFLAGS
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75 pop eax ; Store new EFLAGS in EAX
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76 xor eax, ecx ; Can not toggle ID bit,
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77 jz done ; Processor=80486
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78 mov has_CPUID,1 ; We have CPUID support
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79 done:
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80 }
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81 #endif
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82 return has_CPUID;
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83 }
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84
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85 static __inline__ int CPU_getCPUIDFeatures()
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86 {
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87 int features = 0;
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88 #if defined(__GNUC__) && defined(i386)
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89 __asm__ (
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90 "push %%ebx\n"
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91 "push %%ecx\n"
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92 "push %%edx\n"
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93 " xorl %%eax,%%eax # Set up for CPUID instruction \n"
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94 " cpuid # Get and save vendor ID \n"
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95 " cmpl $1,%%eax # Make sure 1 is valid input for CPUID\n"
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96 " jl 1f # We dont have the CPUID instruction\n"
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97 " xorl %%eax,%%eax \n"
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98 " incl %%eax \n"
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99 " cpuid # Get family/model/stepping/features\n"
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100 " movl %%edx,%0 \n"
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101 "1: \n"
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102 "pop %%edx\n"
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103 "pop %%ecx\n"
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104 "pop %%ebx\n"
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105 : "=r" (features)
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106 :
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107 : "%eax", "%ebx", "%ecx", "%edx"
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108 );
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109 #elif defined(_MSC_VER)
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110 __asm {
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111 xor eax, eax ; Set up for CPUID instruction
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112 cpuid ; Get and save vendor ID
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113 cmp eax, 1 ; Make sure 1 is valid input for CPUID
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114 jl done ; We dont have the CPUID instruction
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115 xor eax, eax
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116 inc eax
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117 cpuid ; Get family/model/stepping/features
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118 mov features, edx
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119 done:
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120 }
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121 #endif
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122 return features;
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123 }
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124
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125 static __inline__ int CPU_haveRDTSC()
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126 {
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127 if ( CPU_haveCPUID() ) {
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128 return (CPU_getCPUIDFeatures() & 0x00000010);
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129 }
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130 return 0;
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131 }
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132
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133 static __inline__ int CPU_haveMMX()
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134 {
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diff changeset
135 if ( CPU_haveCPUID() ) {
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136 return (CPU_getCPUIDFeatures() & 0x00800000);
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137 }
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138 return 0;
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139 }
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140
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141 static __inline__ int CPU_have3DNow()
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142 {
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143 int has_3DNow = 0;
747
da36f59485da Check for CPUID before checking for 3DNow!
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144 if ( !CPU_haveCPUID() ) {
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diff changeset
145 return 0;
da36f59485da Check for CPUID before checking for 3DNow!
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diff changeset
146 }
745
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147 #if defined(__GNUC__) && defined(i386)
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148 __asm__ (
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
149 "push %%ebx\n"
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
150 "push %%ecx\n"
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diff changeset
151 "push %%edx\n"
71ee03909f42 Greatly simplified the SDL CPU info code
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152 " movl $0x80000000,%%eax # Query for extended functions \n"
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153 " cpuid # Get extended function limit \n"
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diff changeset
154 " cmpl $0x80000001,%%eax \n"
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
155 " jbe 1f # Nope, we dont have function 800000001h\n"
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156 " movl $0x80000001,%%eax # Setup extended function 800000001h\n"
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157 " cpuid # and get the information \n"
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158 " testl $0x80000000,%%edx # Bit 31 is set if 3DNow! present \n"
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159 " jz 1f # Nope, we dont have 3DNow support\n"
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160 " movl $1,%0 # Yep, we have 3DNow! support! \n"
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161 "1: \n"
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162 "pop %%edx\n"
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163 "pop %%ecx\n"
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164 "pop %%ebx\n"
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165 : "=r" (has_3DNow)
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166 :
71ee03909f42 Greatly simplified the SDL CPU info code
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167 : "%eax", "%ebx", "%ecx", "%edx"
71ee03909f42 Greatly simplified the SDL CPU info code
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168 );
71ee03909f42 Greatly simplified the SDL CPU info code
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169 #elif defined(_MSC_VER)
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170 __asm {
745
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171 mov eax,80000000h ; Query for extended functions
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172 cpuid ; Get extended function limit
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173 cmp eax,80000001h
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174 jbe done ; Nope, we dont have function 800000001h
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175 mov eax,80000001h ; Setup extended function 800000001h
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diff changeset
176 cpuid ; and get the information
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177 test edx,80000000h ; Bit 31 is set if 3DNow! present
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178 jz done ; Nope, we dont have 3DNow support
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179 mov has_3DNow,1 ; Yep, we have 3DNow! support!
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180 done:
71ee03909f42 Greatly simplified the SDL CPU info code
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181 }
71ee03909f42 Greatly simplified the SDL CPU info code
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182 #endif
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183 return has_3DNow;
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184 }
71ee03909f42 Greatly simplified the SDL CPU info code
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185
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186 static __inline__ int CPU_haveSSE()
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187 {
71ee03909f42 Greatly simplified the SDL CPU info code
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188 if ( CPU_haveCPUID() ) {
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189 return (CPU_getCPUIDFeatures() & 0x02000000);
71ee03909f42 Greatly simplified the SDL CPU info code
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190 }
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191 return 0;
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diff changeset
192 }
739
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parents:
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193
778
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194 static __inline__ int CPU_haveAltiVec()
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195 {
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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196 #ifdef MACOSX
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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197 /* TODO: This check works on OS X. It would be nice to detect AltiVec
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198 properly on for example Linux/PPC, too. But I don't know how that
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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199 is done in Linux (or FreeBSD, or whatever other OS you run PPC :-)
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200 */
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diff changeset
201 int selectors[2] = { CTL_HW, HW_VECTORUNIT };
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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202 int hasVectorUnit = 0;
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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203 size_t length = sizeof(hasVectorUnit);
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204 int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0);
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205 if( 0 == error )
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206 return hasVectorUnit != 0;
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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207 #endif
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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208 return 0;
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209 }
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210
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211 static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;
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212
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
213 static Uint32 SDL_GetCPUFeatures()
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
214 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
215 if ( SDL_CPUFeatures == 0xFFFFFFFF ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
216 SDL_CPUFeatures = 0;
745
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217 if ( CPU_haveRDTSC() ) {
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218 SDL_CPUFeatures |= CPU_HAS_RDTSC;
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
219 }
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
220 if ( CPU_haveMMX() ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
221 SDL_CPUFeatures |= CPU_HAS_MMX;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
222 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
223 if ( CPU_have3DNow() ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
224 SDL_CPUFeatures |= CPU_HAS_3DNOW;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
225 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
226 if ( CPU_haveSSE() ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
227 SDL_CPUFeatures |= CPU_HAS_SSE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
228 }
778
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229 if ( CPU_haveAltiVec() ) {
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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parents: 769
diff changeset
230 SDL_CPUFeatures |= CPU_HAS_ALTIVEC;
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diff changeset
231 }
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
232 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
233 return SDL_CPUFeatures;
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
745
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diff changeset
236 SDL_bool SDL_HasRDTSC()
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
237 {
71ee03909f42 Greatly simplified the SDL CPU info code
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parents: 739
diff changeset
238 if ( SDL_GetCPUFeatures() & CPU_HAS_RDTSC ) {
71ee03909f42 Greatly simplified the SDL CPU info code
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parents: 739
diff changeset
239 return SDL_TRUE;
71ee03909f42 Greatly simplified the SDL CPU info code
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parents: 739
diff changeset
240 }
71ee03909f42 Greatly simplified the SDL CPU info code
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parents: 739
diff changeset
241 return SDL_FALSE;
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
242 }
71ee03909f42 Greatly simplified the SDL CPU info code
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parents: 739
diff changeset
243
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
244 SDL_bool SDL_HasMMX()
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
245 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
246 if ( SDL_GetCPUFeatures() & CPU_HAS_MMX ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
247 return SDL_TRUE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
248 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
249 return SDL_FALSE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
250 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
251
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
252 SDL_bool SDL_Has3DNow()
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
253 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
254 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
255 return SDL_TRUE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
256 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
257 return SDL_FALSE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
258 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
259
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
260 SDL_bool SDL_HasSSE()
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
261 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
262 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
263 return SDL_TRUE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
264 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
265 return SDL_FALSE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
266 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
267
778
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268 SDL_bool SDL_HasAltiVec()
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269 {
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270 if ( SDL_GetCPUFeatures() & CPU_HAS_ALTIVEC ) {
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271 return SDL_TRUE;
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272 }
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273 return SDL_FALSE;
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274 }
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275
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276 #ifdef TEST_MAIN
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277
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278 #include <stdio.h>
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279
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280 int main()
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281 {
778
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282 printf("RDTSC: %d\n", SDL_HasRDTSC());
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283 printf("MMX: %d\n", SDL_HasMMX());
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284 printf("3DNow: %d\n", SDL_Has3DNow());
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285 printf("SSE: %d\n", SDL_HasSSE());
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286 printf("AltiVec: %d\n", SDL_HasAltiVec());
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287 return 0;
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288 }
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289
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290 #endif /* TEST_MAIN */