Mercurial > sdl-ios-xcode
diff src/cpuinfo/SDL_cpuinfo.c @ 1691:c901fd2a42da SDL-1.3
I think this fixes bug #244
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 20 Jun 2006 05:40:57 +0000 |
| parents | 4da1ee79c9af |
| children |
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--- a/src/cpuinfo/SDL_cpuinfo.c Tue Jun 20 05:27:03 2006 +0000 +++ b/src/cpuinfo/SDL_cpuinfo.c Tue Jun 20 05:40:57 2006 +0000 @@ -58,53 +58,92 @@ CPU_haveCPUID(void) { int has_CPUID = 0; +/* *INDENT-OFF* */ #if defined(__GNUC__) && defined(i386) - __asm__(" pushfl # Get original EFLAGS \n" " popl %%eax \n" " movl %%eax,%%ecx \n" " xorl $0x200000,%%eax # Flip ID bit in EFLAGS \n" " pushl %%eax # Save new EFLAGS value on stack \n" " popfl # Replace current EFLAGS value \n" " pushfl # Get new EFLAGS \n" " popl %%eax # Store new EFLAGS in EAX \n" " xorl %%ecx,%%eax # Can not toggle ID bit, \n" " jz 1f # Processor=80486 \n" " movl $1,%0 # We have CPUID support \n" "1: \n": "=m"(has_CPUID): - :"%eax", "%ecx"); + __asm__ ( +" pushfl # Get original EFLAGS \n" +" popl %%eax \n" +" movl %%eax,%%ecx \n" +" xorl $0x200000,%%eax # Flip ID bit in EFLAGS \n" +" pushl %%eax # Save new EFLAGS value on stack \n" +" popfl # Replace current EFLAGS value \n" +" pushfl # Get new EFLAGS \n" +" popl %%eax # Store new EFLAGS in EAX \n" +" xorl %%ecx,%%eax # Can not toggle ID bit, \n" +" jz 1f # Processor=80486 \n" +" movl $1,%0 # We have CPUID support \n" +"1: \n" + : "=m" (has_CPUID) + : + : "%eax", "%ecx" + ); #elif defined(__GNUC__) && defined(__x86_64__) /* Technically, if this is being compiled under __x86_64__ then it has CPUid by definition. But it's nice to be able to prove it. :) */ - __asm__(" pushfq # Get original EFLAGS \n" " popq %%rax \n" " movq %%rax,%%rcx \n" " xorl $0x200000,%%eax # Flip ID bit in EFLAGS \n" " pushq %%rax # Save new EFLAGS value on stack \n" " popfq # Replace current EFLAGS value \n" " pushfq # Get new EFLAGS \n" " popq %%rax # Store new EFLAGS in EAX \n" " xorl %%ecx,%%eax # Can not toggle ID bit, \n" " jz 1f # Processor=80486 \n" " movl $1,%0 # We have CPUID support \n" "1: \n": "=m"(has_CPUID): - :"%rax", "%rcx"); + __asm__ ( +" pushfq # Get original EFLAGS \n" +" popq %%rax \n" +" movq %%rax,%%rcx \n" +" xorl $0x200000,%%eax # Flip ID bit in EFLAGS \n" +" pushq %%rax # Save new EFLAGS value on stack \n" +" popfq # Replace current EFLAGS value \n" +" pushfq # Get new EFLAGS \n" +" popq %%rax # Store new EFLAGS in EAX \n" +" xorl %%ecx,%%eax # Can not toggle ID bit, \n" +" jz 1f # Processor=80486 \n" +" movl $1,%0 # We have CPUID support \n" +"1: \n" + : "=m" (has_CPUID) + : + : "%rax", "%rcx" + ); #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__) - __asm { - pushfd; - Get original EFLAGS pop eax mov ecx, eax xor eax, 200000 h; - Flip ID bit in EFLAGS push eax; - Save new EFLAGS value on stack popfd; - Replace current EFLAGS value pushfd; - Get new EFLAGS pop eax; - Store new EFLAGS in EAX xor eax, ecx; - Can not toggle ID bit, jz done; - Processor = 80486 mov has_CPUID, 1; - We have CPUID support done:} -#elif defined(__sun) && defined(__x86) - __asm(" pushfl \n" - " popl %eax \n" - " movl %eax,%ecx \n" - " xorl $0x200000,%eax \n" - " pushl %eax \n" - " popfl \n" - " pushfl \n" - " popl %eax \n" - " xorl %ecx,%eax \n" - " jz 1f \n" - " movl $1,-8(%ebp) \n" - "1: \n"); + __asm { + pushfd ; Get original EFLAGS + pop eax + mov ecx, eax + xor eax, 200000h ; Flip ID bit in EFLAGS + push eax ; Save new EFLAGS value on stack + popfd ; Replace current EFLAGS value + pushfd ; Get new EFLAGS + pop eax ; Store new EFLAGS in EAX + xor eax, ecx ; Can not toggle ID bit, + jz done ; Processor=80486 + mov has_CPUID,1 ; We have CPUID support +done: + } +#elif defined(__sun) && defined(__i386) + __asm ( +" pushfl \n" +" popl %eax \n" +" movl %eax,%ecx \n" +" xorl $0x200000,%eax \n" +" pushl %eax \n" +" popfl \n" +" pushfl \n" +" popl %eax \n" +" xorl %ecx,%eax \n" +" jz 1f \n" +" movl $1,-8(%ebp) \n" +"1: \n" + ); #elif defined(__sun) && defined(__amd64) - __asm(" pushfq \n" - " popq %rax \n" - " movq %rax,%rcx \n" - " xorl $0x200000,%eax \n" - " pushq %rax \n" - " popfq \n" - " pushfq \n" - " popq %rax \n" - " xorl %ecx,%eax \n" - " jz 1f \n" - " movl $1,-8(%rbp) \n" - "1: \n"); + __asm ( +" pushfq \n" +" popq %rax \n" +" movq %rax,%rcx \n" +" xorl $0x200000,%eax \n" +" pushq %rax \n" +" popfq \n" +" pushfq \n" +" popq %rax \n" +" xorl %ecx,%eax \n" +" jz 1f \n" +" movl $1,-8(%rbp) \n" +"1: \n" + ); #endif +/* *INDENT-ON* */ return has_CPUID; } @@ -112,38 +151,55 @@ CPU_getCPUIDFeatures(void) { int features = 0; +/* *INDENT-OFF* */ #if defined(__GNUC__) && ( defined(i386) || defined(__x86_64__) ) - __asm__(" movl %%ebx,%%edi\n" " xorl %%eax,%%eax # Set up for CPUID instruction \n" " cpuid # Get and save vendor ID \n" " cmpl $1,%%eax # Make sure 1 is valid input for CPUID\n" " jl 1f # We dont have the CPUID instruction\n" " xorl %%eax,%%eax \n" " incl %%eax \n" " cpuid # Get family/model/stepping/features\n" " movl %%edx,%0 \n" "1: \n" " movl %%edi,%%ebx\n": "=m"(features): - :"%eax", "%ecx", "%edx", "%edi"); + __asm__ ( +" movl %%ebx,%%edi\n" +" xorl %%eax,%%eax # Set up for CPUID instruction \n" +" cpuid # Get and save vendor ID \n" +" cmpl $1,%%eax # Make sure 1 is valid input for CPUID\n" +" jl 1f # We dont have the CPUID instruction\n" +" xorl %%eax,%%eax \n" +" incl %%eax \n" +" cpuid # Get family/model/stepping/features\n" +" movl %%edx,%0 \n" +"1: \n" +" movl %%edi,%%ebx\n" + : "=m" (features) + : + : "%eax", "%ecx", "%edx", "%edi" + ); #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__) - __asm { - xor eax, eax; - Set up for CPUID instruction - cpuid; Get and save vendor ID - cmp eax, 1; Make sure 1 is valid input for CPUID - jl done; We dont have the CPUID instruction - xor eax, eax - inc eax - cpuid; Get family / model / stepping / features - mov features, edx done:} -#elif defined(__sun) && (defined(__x86) || defined(__amd64)) - __asm - (" movl %ebx,%edi\n" - " xorl %eax,%eax \n" - " cpuid \n" - " cmpl $1,%eax \n" - " jl 1f \n" - " xorl %eax,%eax \n" - " incl %eax \n" - " cpuid \n" + __asm { + xor eax, eax ; Set up for CPUID instruction + cpuid ; Get and save vendor ID + cmp eax, 1 ; Make sure 1 is valid input for CPUID + jl done ; We dont have the CPUID instruction + xor eax, eax + inc eax + cpuid ; Get family/model/stepping/features + mov features, edx +done: + } +#elif defined(__sun) && (defined(__i386) || defined(__amd64)) + __asm( +" movl %ebx,%edi\n" +" xorl %eax,%eax \n" +" cpuid \n" +" cmpl $1,%eax \n" +" jl 1f \n" +" xorl %eax,%eax \n" +" incl %eax \n" +" cpuid \n" #ifdef __i386 - " movl %edx,-8(%ebp) \n" +" movl %edx,-8(%ebp) \n" #else - " movl %edx,-8(%rbp) \n" +" movl %edx,-8(%rbp) \n" #endif - "1: \n" - " movl %edi,%ebx\n"); +"1: \n" +" movl %edi,%ebx\n" ); #endif +/* *INDENT-ON* */ return features; } @@ -151,34 +207,53 @@ CPU_getCPUIDFeaturesExt(void) { int features = 0; +/* *INDENT-OFF* */ #if defined(__GNUC__) && (defined(i386) || defined (__x86_64__) ) - __asm__(" movl %%ebx,%%edi\n" " movl $0x80000000,%%eax # Query for extended functions \n" " cpuid # Get extended function limit \n" " cmpl $0x80000001,%%eax \n" " jl 1f # Nope, we dont have function 800000001h\n" " movl $0x80000001,%%eax # Setup extended function 800000001h\n" " cpuid # and get the information \n" " movl %%edx,%0 \n" "1: \n" " movl %%edi,%%ebx\n": "=m"(features): - :"%eax", "%ecx", "%edx", "%edi"); + __asm__ ( +" movl %%ebx,%%edi\n" +" movl $0x80000000,%%eax # Query for extended functions \n" +" cpuid # Get extended function limit \n" +" cmpl $0x80000001,%%eax \n" +" jl 1f # Nope, we dont have function 800000001h\n" +" movl $0x80000001,%%eax # Setup extended function 800000001h\n" +" cpuid # and get the information \n" +" movl %%edx,%0 \n" +"1: \n" +" movl %%edi,%%ebx\n" + : "=m" (features) + : + : "%eax", "%ecx", "%edx", "%edi" + ); #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__) - __asm { - mov eax, 80000000 h; - Query for extended functions - cpuid; Get extended function limit - cmp eax, 80000001 h jl done; Nope - , we dont have function 800000001 h mov eax, 80000001 h; - Setup extended function 800000001 h cpuid; - and get the information mov features, edx done:} + __asm { + mov eax,80000000h ; Query for extended functions + cpuid ; Get extended function limit + cmp eax,80000001h + jl done ; Nope, we dont have function 800000001h + mov eax,80000001h ; Setup extended function 800000001h + cpuid ; and get the information + mov features,edx +done: + } #elif defined(__sun) && ( defined(__i386) || defined(__amd64) ) - __asm(" movl %ebx,%edi\n" - " movl $0x80000000,%eax \n" - " cpuid \n" - " cmpl $0x80000001,%eax \n" - " jl 1f \n" - " movl $0x80000001,%eax \n" - " cpuid \n" + __asm ( +" movl %ebx,%edi\n" +" movl $0x80000000,%eax \n" +" cpuid \n" +" cmpl $0x80000001,%eax \n" +" jl 1f \n" +" movl $0x80000001,%eax \n" +" cpuid \n" #ifdef __i386 - " movl %edx,-8(%ebp) \n" +" movl %edx,-8(%ebp) \n" #else - " movl %edx,-8(%rbp) \n" +" movl %edx,-8(%rbp) \n" #endif - "1: \n" - " movl %edi,%ebx\n"); +"1: \n" +" movl %edi,%ebx\n" + ); #endif +/* *INDENT-ON* */ return features; } @@ -394,4 +469,5 @@ } #endif /* TEST_MAIN */ + /* vi: set ts=4 sw=4 expandtab: */