[llvm-commits] [llvm] r157805 - /llvm/trunk/lib/Target/X86/X86Subtarget.cpp

[Craig Topper]

Author: ctopper
Date: Fri Jun  1 01:10:14 2012
New Revision: 157805

URL: http://llvm.org/viewvc/llvm-project?rev=157805&view=rev
Log:
Enable automatic detection of FMA3 support to allow intrinsics to be used.

Modified:
    llvm/trunk/lib/Target/X86/X86Subtarget.cpp

Modified: llvm/trunk/lib/Target/X86/X86Subtarget.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86Subtarget.cpp?rev=157805&r1=157804&r2=157805&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86Subtarget.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86Subtarget.cpp Fri Jun  1 01:10:14 2012
@@ -205,12 +205,10 @@
     HasPCLMUL = true;
     ToggleFeature(X86::FeaturePCLMUL);
   }
-  // FMA3 autodetection is switched off until we have a special flag
-  // in code generator
-  //if ((ECX >> 12) & 0x1) {
-  //  HasFMA3 = true;
-  //  ToggleFeature(X86::FeatureFMA3);
-  //}
+  if ((ECX >> 12) & 0x1) {
+    HasFMA3 = true;
+    ToggleFeature(X86::FeatureFMA3);
+  }
   if (IsIntel && ((ECX >> 22) & 0x1)) {
     HasMOVBE = true;
     ToggleFeature(X86::FeatureMOVBE);