isledecomp/isle
1
0
Fork 0
mirror of https://github.com/isledecomp/isle.git synced 2026-01-19 22:31:15 +00:00
Code Issues Actions 4 Packages Projects Releases Wiki Activity

Match LegoDeviceEnumerate::SupportsMMX

Browse Source
This commit is contained in:
Christian Semmler 2025-05-07 15:37:39 -07:00
parent 2cab039a5f
commit af393e6247
1 changed files with 31 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
LEGO1/mxdirectx/legodxinfo.cpp
View File

@ -201,42 +201,45 @@ int LegoDeviceEnumerate::FUN_1009d0d0()
// FUNCTION: BETA10 0x1011cf54
int LegoDeviceEnumerate::SupportsMMX()
{
if (!SupportsCPUID()) {
return 0;
}
int supports_mmx;
int supports_mmx = SupportsCPUID();
if (supports_mmx) {
#ifdef _MSC_VER
__asm {
mov eax, 0x0 ; EAX=0: Highest Function Parameter and Manufacturer ID
__asm {
push ebx
mov eax, 0x0 ; EAX=0: Highest Function Parameter and Manufacturer ID
#if _MSC_VER > 1100
cpuid ; Run CPUID
cpuid ; Run CPUID
#else
__emit 0x0f
__emit 0xa2
__emit 0x0f
__emit 0xa2
#endif
mov eax, 0x1 ; EAX=1: Processor Info and Feature Bits (unused)
mov eax, 0x1 ; EAX=1: Processor Info and Feature Bits (unused)
#if _MSC_VER > 1100
cpuid ; Run CPUID
cpuid ; Run CPUID
#else
__emit 0x0f
__emit 0xa2
__emit 0x0f
__emit 0xa2
#endif
xor eax, eax ; Zero EAX register
bt edx, 0x17 ; Test bit 0x17 (23): MMX instructions (64-bit SIMD) (Store in CF)
adc eax, eax ; Add with carry: EAX = EAX + EAX + CF = CF
pop ebx
mov supports_mmx, eax ; Save eax into C variable
}
#else
__asm__("movl $0x0, %%eax\n\t" // EAX=0: Highest Function Parameter and Manufacturer ID
"cpuid\n\t" // Run CPUID\n"
"mov $0x1, %%eax\n\t" // EAX=1: Processor Info and Feature Bits (unused)
"cpuid\n\t" // Run CPUID
"xorl %%eax, %%eax\n\t" // Zero EAX register
"btl $0x15, %%edx\n\t" // Test bit 0x17 (23): MMX instructions (64-bit SIMD) (Store in CF)
"adc %%eax, %%eax" // Add with carry: EAX = EAX + EAX + CF = CF
: "=a"(supports_mmx) // supports_mmx == EAX
);
#endif
xor eax, eax ; Zero EAX register
bt edx, 0x17 ; Test bit 0x17 (23): MMX instructions (64-bit SIMD) (Store in CF)
adc eax, eax ; Add with carry: EAX = EAX + EAX + CF = CF
mov supports_mmx, eax ; Save eax into C variable
}
#else
__asm__("movl $0x0, %%eax\n\t" // EAX=0: Highest Function Parameter and Manufacturer ID
"cpuid\n\t" // Run CPUID\n"
"mov $0x1, %%eax\n\t" // EAX=1: Processor Info and Feature Bits (unused)
"cpuid\n\t" // Run CPUID
"xorl %%eax, %%eax\n\t" // Zero EAX register
"btl $0x15, %%edx\n\t" // Test bit 0x17 (23): MMX instructions (64-bit SIMD) (Store in CF)
"adc %%eax, %%eax" // Add with carry: EAX = EAX + EAX + CF = CF
: "=a"(supports_mmx) // supports_mmx == EAX
);
#endif
return supports_mmx;
}