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Implement MxDeviceEnumerate::SupportsMMX

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This commit is contained in:
Anonymous Maarten 2024-02-04 02:51:31 +01:00
parent 724cdeb86f
commit 5f0304da04
2 changed files with 70 additions and 10 deletions
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76
LEGO1/mxdirectx/mxdirect3d.cpp
View File

@ -734,7 +734,7 @@ int MxDeviceEnumerate::FUN_1009d0d0()
int i = 0;
int j = 0;
int k = -1;
unsigned int und = FUN_1009d1a0();
unsigned int cpu_mmx = SupportsMMX();
for (list<MxDriver>::iterator it = m_list.begin();; it++) {
if (it == m_list.end()) {
@ -746,7 +746,7 @@ int MxDeviceEnumerate::FUN_1009d0d0()
return j;
}
if ((und && (*it2).m_HELDesc.dcmColorModel == D3DCOLOR_RGB && i == 0) ||
if ((cpu_mmx && (*it2).m_HELDesc.dcmColorModel == D3DCOLOR_RGB && i == 0) ||
((*it2).m_HELDesc.dcmColorModel == D3DCOLOR_MONO && i == 0 && k < 0)) {
k = j;
}
@ -760,16 +760,76 @@ int MxDeviceEnumerate::FUN_1009d0d0()
return -1;
}
// STUB: LEGO1 0x1009d1a0
undefined4 MxDeviceEnumerate::FUN_1009d1a0()
// FUNCTION: LEGO1 0x1009d1a0
int MxDeviceEnumerate::SupportsMMX()
{
return 1;
int supports_mmx = SupportsCPUID();
if (supports_mmx) {
#ifdef _MSC_VER
__asm {
mov eax, 0x0 ; EAX=0: Highest Function Parameter and Manufacturer ID
#if _MSC_VER > 1100
cpuid ; Run CPUID
#else
__emit 0x0f
__emit 0xa2
#endif
mov eax, 0x1 ; EAX=1: Processor Info and Feature Bits (unused)
#if _MSC_VER > 1100
cpuid ; Run CPUID
#else
__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
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;
}
// STUB: LEGO1 0x1009d1e0
undefined4 MxDeviceEnumerate::FUN_1009d1e0()
// FUNCTION: LEGO1 0x1009d1e0
int MxDeviceEnumerate::SupportsCPUID()
{
return 1;
int has_cpuid;
#ifdef _MSC_VER
__asm {
xor eax, eax ; Zero EAX register
pushfd ; Push EFLAGS register value on the stack
or dword ptr[esp], 0x200000 ; Set bit 0x200000: Able to use CPUID instruction (Pentium+)
popfd ; Write the updated value into the EFLAGS register
pushfd ; Push EFLAGS register value on the stack (again)
btr dword ptr[esp], 0x15 ; Test bit 0x15 (21) and reset (set CF)
adc eax, eax ; Add with carry: EAX = EAX + EAX + CF = CF
popfd ; Push EFLAGS register value on the stack (again, and makes sure the stack remains the same)
mov has_cpuid, eax ; Save eax into C variable
}
#else
__asm__("xorl %%eax, %%eax\n\t" // Zero EAX register
"pushfl\n\t" // Push EFLAGS register value on the stack
"orl $0x200000, (%%esp)\n\t" // Set bit 0x200000: Able to use CPUID instruction (Pentium+)
"popfl\n\t" // Write the updated value into the EFLAGS register
"pushfl\n\t" // Push EFLAGS register value on the stack (again)
"btrl $0x15, (%%esp)\n\t" // Test bit 0x15 (21) and reset (set CF)
"adc %%eax, %%eax\n\t" // Add with carry: EAX = EAX + EAX + CF = CF
"popfl" // Push EFLAGS register value on the stack (again, and makes sure the stack remains the same)
: "=a"(has_cpuid) // has_cpuid == EAX
);
#endif
return has_cpuid;
}
// FUNCTION: LEGO1 0x1009d210

4
LEGO1/mxdirectx/mxdirect3d.h
View File

@ -216,8 +216,8 @@ class MxDeviceEnumerate {
LPD3DDEVICEDESC p_HELDesc,
LPVOID p_context
);
static undefined4 FUN_1009d1a0();
static undefined4 FUN_1009d1e0();
static int SupportsMMX();
static int SupportsCPUID();
friend class MxDirect3D;