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A better workaround

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25692 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-01-27 19:30:30 +00:00
parent 3ea0e0e005
commit b3a7e21b7e
1 changed files with 5 additions and 6 deletions
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11
lib/Target/X86/X86Subtarget.cpp
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@ -22,11 +22,10 @@ static void GetCpuIDAndInfo(unsigned value, unsigned *EAX, unsigned *EBX,
#if defined(__GNUC__) #if defined(__GNUC__)
asm ("pushl\t%%ebx\n\t" asm ("pushl\t%%ebx\n\t"
"cpuid\n\t" "cpuid\n\t"
"movl\t%%ebx, %%esi\n\t"
"popl\t%%ebx" "popl\t%%ebx"
: "=a" (*EAX), : "=a" (*EAX),
#if !defined(__DYNAMIC__) // This works around a gcc -fPIC bug "=S" (*EBX),
"=b" (*EBX),
#endif
"=c" (*ECX), "=c" (*ECX),
"=d" (*EDX) "=d" (*EDX)
: "a" (value)); : "a" (value));
@ -35,11 +34,11 @@ static void GetCpuIDAndInfo(unsigned value, unsigned *EAX, unsigned *EBX,
} }
static const char *GetCurrentX86CPU() { static const char *GetCurrentX86CPU() {
unsigned EAX = 0, DUMMY = 0, ECX = 0, EDX = 0; unsigned EAX = 0, EBX = 0, ECX = 0, EDX = 0;
GetCpuIDAndInfo(0x1, &EAX, &DUMMY, &ECX, &EDX); GetCpuIDAndInfo(0x1, &EAX, &EBX, &ECX, &EDX);
unsigned Family = (EAX & (0xffffffff >> (32 - 4)) << 8) >> 8; // Bits 8 - 11 unsigned Family = (EAX & (0xffffffff >> (32 - 4)) << 8) >> 8; // Bits 8 - 11
unsigned Model = (EAX & (0xffffffff >> (32 - 4)) << 4) >> 4; // Bits 4 - 7 unsigned Model = (EAX & (0xffffffff >> (32 - 4)) << 4) >> 4; // Bits 4 - 7
GetCpuIDAndInfo(0x80000001, &EAX, &DUMMY, &ECX, &EDX); GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
bool Em64T = EDX & (1 << 29); bool Em64T = EDX & (1 << 29);
switch (Family) { switch (Family) {