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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2013-07-29 11:02:08 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2013-07-29 11:02:08 +0000 |
| commit | 9e036910f87570bce83a5bb3457b689a05868846 (patch) | |
| tree | ca8e7814631bd717116bcc3c85c151b1aea852c7 /lib/Support | |
| parent | fd79485dfa4fee67467299720efac2d0c21d846c (diff) | |
| download | external_llvm-9e036910f87570bce83a5bb3457b689a05868846.zip external_llvm-9e036910f87570bce83a5bb3457b689a05868846.tar.gz external_llvm-9e036910f87570bce83a5bb3457b689a05868846.tar.bz2 | |
Some Intel Penryn CPUs come with SSE4 disabled. Detect them as core 2.
PR16721.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187350 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support')
| -rw-r--r-- | lib/Support/Host.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Support/Host.cpp b/lib/Support/Host.cpp index 40e7a49..90e4389 100644 --- a/lib/Support/Host.cpp +++ b/lib/Support/Host.cpp @@ -149,6 +149,7 @@ std::string sys::getHostCPUName() { DetectX86FamilyModel(EAX, Family, Model); bool HasSSE3 = (ECX & 0x1); + bool HasSSE41 = (ECX & 0x80000); // If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV // indicates that the AVX registers will be saved and restored on context // 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. // // 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 // processors are manufactured using the 45 nm process. |