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Some Intel Penryn CPUs come with SSE4 disabled. Detect them as core 2.

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PR16721.

llvm-svn: 187350
This commit is contained in:
Benjamin Kramer 2013-07-29 11:02:08 +00:00
parent 5aac9ffdd0
commit 9fe2707840
1 changed files with 3 additions and 1 deletions
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4
lib/Support/Host.cpp
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@ -149,6 +149,7 @@ std::string sys::getHostCPUName() {
DetectX86FamilyModel(EAX, Family, Model); DetectX86FamilyModel(EAX, Family, Model);
bool HasSSE3 = (ECX & 0x1); bool HasSSE3 = (ECX & 0x1);
bool HasSSE41 = (ECX & 0x80000);
// If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV // If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV
// indicates that the AVX registers will be saved and restored on context // indicates that the AVX registers will be saved and restored on context
// switch, then we have full AVX support. // switch, then we have full AVX support.
@ -244,7 +245,8 @@ std::string sys::getHostCPUName() {
// 17h. All processors are manufactured using the 45 nm process. // 17h. All processors are manufactured using the 45 nm process.
// //
// 45nm: Penryn , Wolfdale, Yorkfield (XE) // 45nm: Penryn , Wolfdale, Yorkfield (XE)
return "penryn"; // Not all Penryn processors support SSE 4.1 (such as the Pentium brand)
return HasSSE41 ? "penryn" : "core2";
case 26: // Intel Core i7 processor and Intel Xeon processor. All case 26: // Intel Core i7 processor and Intel Xeon processor. All
// processors are manufactured using the 45 nm process. // processors are manufactured using the 45 nm process.