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* CPUID changes:

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- Added full ability to recognize true Intel HTT CPU capability (support to discriminate Intel Core 2 Duo...)
  - Attempt to fix a register trashing (issue 4022 generally, linux and mac systems)

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@7097 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
gnick79 2011-02-07 18:25:55 +00:00
parent 9bbd5b9157
commit bba19bb36b
1 changed files with 22 additions and 31 deletions
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53
Source/Core/Common/Src/CPUDetect.cpp
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@ -35,29 +35,20 @@
static inline void do_cpuid(unsigned int *eax, unsigned int *ebx, static inline void do_cpuid(unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx) unsigned int *ecx, unsigned int *edx)
{ {
#ifdef _LP64 // Note: EBX is reserved on Mac OS X and in PIC on Linux, so it has to be
__asm__("cpuid" // restored at the end of the asm block.
: "=a" (*eax), __asm__(
"=b" (*ebx), "pushl %%ebx;"
"=c" (*ecx), "cpuid;"
"=d" (*edx) "movl %%ebx,%1;"
: "a" (*eax) "popl %%ebx;"
); : "=a" (*eax),
#else "=r" (*ebx),
// Note: EBX is reserved on Mac OS X and in PIC on Linux, so it has to be "=c" (*ecx),
// restored at the end of the asm block. "=d" (*edx)
__asm__( : "a" (*eax)
"pushl %%ebx;" : "eax", "ebx", "ecx", "edx" // clobbered registers
"cpuid;" );
"movl %%ebx,%1;"
"popl %%ebx;"
: "=a" (*eax),
"=r" (*ebx),
"=c" (*ecx),
"=d" (*edx)
: "a" (*eax)
);
#endif
} }
static void __cpuid(int info[4], int x) static void __cpuid(int info[4], int x)
@ -140,8 +131,7 @@ void CPUInfo::Detect()
__cpuid(cpu_id, 0x00000001); __cpuid(cpu_id, 0x00000001);
logical_cpu_count = (cpu_id[1] >> 16) & 0xFF; logical_cpu_count = (cpu_id[1] >> 16) & 0xFF;
ht = (cpu_id[3] >> 28) & 1; ht = (cpu_id[3] >> 28) & 1;
// True HTT is valid for intel processors only.
HTT = (ht && vendor == VENDOR_INTEL);
if ((cpu_id[3] >> 25) & 1) bSSE = true; if ((cpu_id[3] >> 25) & 1) bSSE = true;
if ((cpu_id[3] >> 26) & 1) bSSE2 = true; if ((cpu_id[3] >> 26) & 1) bSSE2 = true;
if ((cpu_id[2]) & 1) bSSE3 = true; if ((cpu_id[2]) & 1) bSSE3 = true;
@ -177,18 +167,18 @@ void CPUInfo::Detect()
int apic_id_core_id_size = (cpu_id[2] >> 12) & 0xF; int apic_id_core_id_size = (cpu_id[2] >> 12) & 0xF;
if (apic_id_core_id_size == 0) { if (apic_id_core_id_size == 0) {
if (ht) { if (ht) {
if (vendor == VENDOR_OTHER) {
num_cores = 1;
}
// New mechanism for modern Intel CPUs. // New mechanism for modern Intel CPUs.
if (HTT) { if (vendor == VENDOR_INTEL) {
__cpuid(cpu_id, 0x00000004); __cpuid(cpu_id, 0x00000004);
int cores_x_package = ((cpu_id[0] >> 26) & 0x3F) + 1; int cores_x_package = ((cpu_id[0] >> 26) & 0x3F) + 1;
HTT = (cores_x_package < logical_cpu_count);
cores_x_package = ((logical_cpu_count % cores_x_package) == 0) ? cores_x_package : 1; cores_x_package = ((logical_cpu_count % cores_x_package) == 0) ? cores_x_package : 1;
num_cores = (cores_x_package > 1) ? cores_x_package : num_cores; num_cores = (cores_x_package > 1) ? cores_x_package : num_cores;
logical_cpu_count /= cores_x_package; logical_cpu_count /= cores_x_package;
} else if (vendor == VENDOR_OTHER) { //trash block!!??
num_cores = 1;
} }
} else { } else { //trash block!!??
num_cores = 1; num_cores = 1;
} }
} else { } else {
@ -207,7 +197,7 @@ std::string CPUInfo::Summarize()
else else
{ {
sum = StringFromFormat("%s, %i cores", cpu_string, num_cores); sum = StringFromFormat("%s, %i cores", cpu_string, num_cores);
if (HTT) sum += StringFromFormat(" (%i logical thread(s) per physical core)", logical_cpu_count); if (HTT) sum += StringFromFormat(" (%i logical threads per physical core)", logical_cpu_count);
} }
if (bSSE) sum += ", SSE"; if (bSSE) sum += ", SSE";
if (bSSE2) sum += ", SSE2"; if (bSSE2) sum += ", SSE2";
@ -215,6 +205,7 @@ std::string CPUInfo::Summarize()
if (bSSSE3) sum += ", SSSE3"; if (bSSSE3) sum += ", SSSE3";
if (bSSE4_1) sum += ", SSE4.1"; if (bSSE4_1) sum += ", SSE4.1";
if (bSSE4_2) sum += ", SSE4.2"; if (bSSE4_2) sum += ", SSE4.2";
if (HTT) sum += ", HTT";
if (bAVX) sum += ", AVX"; if (bAVX) sum += ", AVX";
if (bAES) sum += ", AES"; if (bAES) sum += ", AES";
if (bLongMode) sum += ", 64-bit support"; if (bLongMode) sum += ", 64-bit support";