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Autodetect MMX & SSE stuff for AMD processors

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llvm-svn: 35292
This commit is contained in:
Anton Korobeynikov 2007-03-23 23:46:48 +00:00
parent ad01036d5c
commit 63bff8af0c
1 changed files with 11 additions and 10 deletions
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7
lib/Target/X86/X86Subtarget.cpp
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@ -107,8 +107,6 @@ void X86Subtarget::AutoDetectSubtargetFeatures() {
if (X86::GetCpuIDAndInfo(0, &EAX, text.u+0, text.u+2, text.u+1))
return;
// FIXME: support for AMD family of processors.
if (memcmp(text.c, "GenuineIntel", 12) == 0) {
X86::GetCpuIDAndInfo(0x1, &EAX, &EBX, &ECX, &EDX);
if ((EDX >> 23) & 0x1) X86SSELevel = MMX;
@ -116,8 +114,11 @@ void X86Subtarget::AutoDetectSubtargetFeatures() {
if ((EDX >> 26) & 0x1) X86SSELevel = SSE2;
if (ECX & 0x1) X86SSELevel = SSE3;
if (memcmp(text.c, "GenuineIntel", 12) == 0) {
X86::GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
HasX86_64 = (EDX >> 29) & 0x1;
} else if (memcmp(text.c, "AuthenticAMD", 12) == 0) {
// FIXME: Correctly check for 64-bit stuff
}
}
@ -203,10 +204,10 @@ static const char *GetCurrentX86CPU() {
}
case 15:
switch (Model) {
case 1: return "opteron";
case 5: return "athlon-fx"; // also opteron
default: return "athlon64";
}
default:
return "generic";
}