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Match LegoDeviceEnumerate::SupportsMMX (#1443)

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* Match `LegoDeviceEnumerate::SupportsMMX`

* Fix indent
This commit is contained in:
Christian Semmler
2025-05-07 15:46:21 -07:00
committed by GitHub
parent 2cab039a5f
commit f851103d48
1 changed files with 40 additions and 37 deletions
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11
LEGO1/mxdirectx/legodxinfo.cpp
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@@ -201,12 +201,12 @@ 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 {
push ebx
mov eax, 0x0 ; EAX=0: Highest Function Parameter and Manufacturer ID
#if _MSC_VER > 1100
cpuid ; Run CPUID
@@ -224,6 +224,7 @@ int LegoDeviceEnumerate::SupportsMMX()
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
@@ -237,6 +238,8 @@ int LegoDeviceEnumerate::SupportsMMX()
: "=a"(supports_mmx) // supports_mmx == EAX
);
#endif
}
return supports_mmx;
}