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annotate src/cpuinfo/SDL_cpuinfo.c @ 811:e06ec825242d

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Don't use hardware overlay by default (seems much faster this way)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 11 Feb 2004 16:50:54 +0000
parents b2fda076b02e
children 9eb85a211abd
rev   line source
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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
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b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga
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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
Sam Lantinga <slouken@libsdl.org>
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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
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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
778
8ac3f46f9d09 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 */
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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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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ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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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(_MSC_VER)
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85 __asm {
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86 pushfd ; Get original EFLAGS
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87 pop eax
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88 mov ecx, eax
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89 xor eax, 200000h ; Flip ID bit in EFLAGS
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90 push eax ; Save new EFLAGS value on stack
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91 popfd ; Replace current EFLAGS value
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92 pushfd ; Get new EFLAGS
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93 pop eax ; Store new EFLAGS in EAX
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94 xor eax, ecx ; Can not toggle ID bit,
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95 jz done ; Processor=80486
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96 mov has_CPUID,1 ; We have CPUID support
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97 done:
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98 }
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99 #endif
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100 return has_CPUID;
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101 }
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102
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103 static __inline__ int CPU_getCPUIDFeatures()
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104 {
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105 int features = 0;
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106 #if defined(__GNUC__) && defined(i386)
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107 __asm__ (
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108 " movl %%ebx,%%edi\n"
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109 " xorl %%eax,%%eax # Set up for CPUID instruction \n"
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110 " cpuid # Get and save vendor ID \n"
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111 " cmpl $1,%%eax # Make sure 1 is valid input for CPUID\n"
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112 " jl 1f # We dont have the CPUID instruction\n"
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113 " xorl %%eax,%%eax \n"
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114 " incl %%eax \n"
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115 " cpuid # Get family/model/stepping/features\n"
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116 " movl %%edx,%0 \n"
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117 "1: \n"
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118 " movl %%edi,%%ebx\n"
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119 : "=m" (features)
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120 :
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121 : "%eax", "%ebx", "%ecx", "%edx", "%edi"
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122 );
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123 #elif defined(_MSC_VER)
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124 __asm {
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125 xor eax, eax ; Set up for CPUID instruction
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126 cpuid ; Get and save vendor ID
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127 cmp eax, 1 ; Make sure 1 is valid input for CPUID
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128 jl done ; We dont have the CPUID instruction
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129 xor eax, eax
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130 inc eax
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131 cpuid ; Get family/model/stepping/features
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132 mov features, edx
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133 done:
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134 }
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
135 #endif
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
136 return features;
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
137 }
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
138
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
139 static __inline__ int CPU_getCPUIDFeaturesExt()
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
140 {
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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parents: 784
diff changeset
141 int features = 0;
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
142 #if defined(__GNUC__) && defined(i386)
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
143 __asm__ (
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
144 " movl %%ebx,%%edi\n"
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
145 " movl $0x80000000,%%eax # Query for extended functions \n"
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
146 " cpuid # Get extended function limit \n"
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
147 " cmpl $0x80000001,%%eax \n"
787
07760c8854d1 Date: Sat, 24 Jan 2004 14:49:58 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 786
diff changeset
148 " jl 1f # Nope, we dont have function 800000001h\n"
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
149 " movl $0x80000001,%%eax # Setup extended function 800000001h\n"
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
150 " cpuid # and get the information \n"
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
151 " movl %%edx,%0 \n"
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
152 "1: \n"
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
153 " movl %%edi,%%ebx\n"
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
154 : "=m" (features)
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
155 :
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
156 : "%eax", "%ebx", "%ecx", "%edx", "%edi"
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
157 );
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
158 #elif defined(_MSC_VER)
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
159 __asm {
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
160 mov eax,80000000h ; Query for extended functions
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
161 cpuid ; Get extended function limit
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
162 cmp eax,80000001h
787
07760c8854d1 Date: Sat, 24 Jan 2004 14:49:58 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 786
diff changeset
163 jl done ; Nope, we dont have function 800000001h
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
164 mov eax,80000001h ; Setup extended function 800000001h
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
165 cpuid ; and get the information
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
166 mov features,edx
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
167 done:
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
168 }
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
169 #endif
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
170 return features;
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
171 }
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
172
745
71ee03909f42 Greatly simplified the SDL CPU info code
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parents: 739
diff changeset
173 static __inline__ int CPU_haveRDTSC()
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
174 {
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
175 if ( CPU_haveCPUID() ) {
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
176 return (CPU_getCPUIDFeatures() & 0x00000010);
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
177 }
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
178 return 0;
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
179 }
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
180
745
71ee03909f42 Greatly simplified the SDL CPU info code
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parents: 739
diff changeset
181 static __inline__ int CPU_haveMMX()
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
182 {
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
183 if ( CPU_haveCPUID() ) {
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
184 return (CPU_getCPUIDFeatures() & 0x00800000);
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
185 }
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
186 return 0;
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
187 }
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
188
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
189 static __inline__ int CPU_haveMMXExt()
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
190 {
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
191 if ( CPU_haveCPUID() ) {
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
192 return (CPU_getCPUIDFeaturesExt() & 0x00400000);
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
193 }
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
194 return 0;
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
195 }
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
196
745
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
197 static __inline__ int CPU_have3DNow()
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
198 {
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
199 if ( CPU_haveCPUID() ) {
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
200 return (CPU_getCPUIDFeaturesExt() & 0x80000000);
747
da36f59485da Check for CPUID before checking for 3DNow!
Sam Lantinga <slouken@libsdl.org>
parents: 745
diff changeset
201 }
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
202 return 0;
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
203 }
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
204
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
205 static __inline__ int CPU_have3DNowExt()
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
206 {
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
207 if ( CPU_haveCPUID() ) {
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
208 return (CPU_getCPUIDFeaturesExt() & 0x40000000);
745
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
209 }
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
210 return 0;
745
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
211 }
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
212
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
213 static __inline__ int CPU_haveSSE()
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
214 {
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
215 if ( CPU_haveCPUID() ) {
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
216 return (CPU_getCPUIDFeatures() & 0x02000000);
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
217 }
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
218 return 0;
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
219 }
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
220
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
221 static __inline__ int CPU_haveSSE2()
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
222 {
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
223 if ( CPU_haveCPUID() ) {
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
224 return (CPU_getCPUIDFeatures() & 0x04000000);
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
225 }
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
226 return 0;
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
227 }
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
228
778
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
229 static __inline__ int CPU_haveAltiVec()
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
230 {
796
dec19b813b04 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 795
diff changeset
231 volatile int altivec = 0;
778
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
232 #ifdef MACOSX
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
233 int selectors[2] = { CTL_HW, HW_VECTORUNIT };
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
234 int hasVectorUnit = 0;
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
235 size_t length = sizeof(hasVectorUnit);
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
236 int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0);
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
237 if( 0 == error )
793
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
238 altivec = (hasVectorUnit != 0);
795
275708f2e838 Check for altivec assembly support before trying to use it. :)
Sam Lantinga <slouken@libsdl.org>
parents: 793
diff changeset
239 #elif defined(USE_SETJMP) && defined(GCC_ALTIVEC)
793
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
240 void (*handler)(int sig);
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
241 handler = signal(SIGILL, illegal_instruction);
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
242 if ( setjmp(jmpbuf) == 0 ) {
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
243 asm volatile ("mtspr 256, %0\n\t"
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
244 "vand %%v0, %%v0, %%v0"
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
245 :
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
246 : "r" (-1));
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
247 altivec = 1;
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
248 }
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
249 signal(SIGILL, handler);
778
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
250 #endif
793
c20f08c4f437 Altivec detection on non-MacOS X systems
Sam Lantinga <slouken@libsdl.org>
parents: 787
diff changeset
251 return altivec;
778
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
252 }
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
253
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
254 static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
255
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
256 static Uint32 SDL_GetCPUFeatures()
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
257 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
258 if ( SDL_CPUFeatures == 0xFFFFFFFF ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
259 SDL_CPUFeatures = 0;
745
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
260 if ( CPU_haveRDTSC() ) {
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
261 SDL_CPUFeatures |= CPU_HAS_RDTSC;
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
262 }
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
263 if ( CPU_haveMMX() ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
264 SDL_CPUFeatures |= CPU_HAS_MMX;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
265 }
786
e1e0a0a94570 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 785
diff changeset
266 if ( CPU_haveMMXExt() ) {
e1e0a0a94570 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 785
diff changeset
267 SDL_CPUFeatures |= CPU_HAS_MMXEXT;
e1e0a0a94570 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 785
diff changeset
268 }
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
269 if ( CPU_have3DNow() ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
270 SDL_CPUFeatures |= CPU_HAS_3DNOW;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
271 }
786
e1e0a0a94570 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 785
diff changeset
272 if ( CPU_have3DNowExt() ) {
e1e0a0a94570 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 785
diff changeset
273 SDL_CPUFeatures |= CPU_HAS_3DNOWEXT;
e1e0a0a94570 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 785
diff changeset
274 }
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275 if ( CPU_haveSSE() ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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276 SDL_CPUFeatures |= CPU_HAS_SSE;
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277 }
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278 if ( CPU_haveSSE2() ) {
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279 SDL_CPUFeatures |= CPU_HAS_SSE2;
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280 }
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281 if ( CPU_haveAltiVec() ) {
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282 SDL_CPUFeatures |= CPU_HAS_ALTIVEC;
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283 }
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284 }
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285 return SDL_CPUFeatures;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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286 }
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287
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288 SDL_bool SDL_HasRDTSC()
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289 {
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290 if ( SDL_GetCPUFeatures() & CPU_HAS_RDTSC ) {
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291 return SDL_TRUE;
71ee03909f42 Greatly simplified the SDL CPU info code
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292 }
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293 return SDL_FALSE;
71ee03909f42 Greatly simplified the SDL CPU info code
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294 }
71ee03909f42 Greatly simplified the SDL CPU info code
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295
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296 SDL_bool SDL_HasMMX()
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297 {
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298 if ( SDL_GetCPUFeatures() & CPU_HAS_MMX ) {
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299 return SDL_TRUE;
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300 }
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301 return SDL_FALSE;
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302 }
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303
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304 SDL_bool SDL_HasMMXExt()
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305 {
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306 if ( SDL_GetCPUFeatures() & CPU_HAS_MMXEXT ) {
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307 return SDL_TRUE;
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308 }
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309 return SDL_FALSE;
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310 }
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311
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312 SDL_bool SDL_Has3DNow()
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313 {
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314 if ( SDL_GetCPUFeatures() & CPU_HAS_3DNOW ) {
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315 return SDL_TRUE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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316 }
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diff changeset
317 return SDL_FALSE;
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318 }
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319
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320 SDL_bool SDL_Has3DNowExt()
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321 {
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322 if ( SDL_GetCPUFeatures() & CPU_HAS_3DNOWEXT ) {
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323 return SDL_TRUE;
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324 }
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325 return SDL_FALSE;
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326 }
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327
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328 SDL_bool SDL_HasSSE()
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329 {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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330 if ( SDL_GetCPUFeatures() & CPU_HAS_SSE ) {
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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331 return SDL_TRUE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
332 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
333 return SDL_FALSE;
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
334 }
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335
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336 SDL_bool SDL_HasSSE2()
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337 {
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338 if ( SDL_GetCPUFeatures() & CPU_HAS_SSE2 ) {
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339 return SDL_TRUE;
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340 }
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341 return SDL_FALSE;
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342 }
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343
778
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344 SDL_bool SDL_HasAltiVec()
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345 {
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diff changeset
346 if ( SDL_GetCPUFeatures() & CPU_HAS_ALTIVEC ) {
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347 return SDL_TRUE;
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diff changeset
348 }
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349 return SDL_FALSE;
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diff changeset
350 }
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351
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diff changeset
352 #ifdef TEST_MAIN
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353
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
354 #include <stdio.h>
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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355
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
356 int main()
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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diff changeset
357 {
778
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358 printf("RDTSC: %d\n", SDL_HasRDTSC());
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diff changeset
359 printf("MMX: %d\n", SDL_HasMMX());
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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parents: 784
diff changeset
360 printf("MMXExt: %d\n", SDL_HasMMXExt());
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents:
diff changeset
361 printf("3DNow: %d\n", SDL_Has3DNow());
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
362 printf("3DNowExt: %d\n", SDL_Has3DNowExt());
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
363 printf("SSE: %d\n", SDL_HasSSE());
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
364 printf("SSE2: %d\n", SDL_HasSSE2());
778
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parents: 769
diff changeset
365 printf("AltiVec: %d\n", SDL_HasAltiVec());
745
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diff changeset
366 return 0;
739
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parents:
diff changeset
367 }
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
368
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
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diff changeset
369 #endif /* TEST_MAIN */