commit a486a11dcfaa9f31d78eb52929d8d33c56e9cf60
author Michael Liao <michael.liao@intel.com> Thu Mar 28 23:41:26 2013 +0000
committer Michael Liao <michael.liao@intel.com> Thu Mar 28 23:41:26 2013 +0000
tree 20d7f03762c6a2c4509288eb128941908d176577
parent 3b602ce5a4a1fc3ace06aa794c78466947012f9c

Add support of RDSEED defined in AVX2 extension

llvm-svn: 178314

llvm/lib/Target/X86/X86Subtarget.cpp

diff --git a/llvm/lib/Target/X86/X86Subtarget.cpp b/llvm/lib/Target/X86/X86Subtarget.cpp
index fa99129..4132463 100644
--- a/llvm/lib/Target/X86/X86Subtarget.cpp
+++ b/llvm/lib/Target/X86/X86Subtarget.cpp
@@ -334,6 +334,10 @@
         HasADX = true;
         ToggleFeature(X86::FeatureADX);
       }
+      if (IsIntel && ((EBX >> 18) & 0x1)) {
+        HasRDSEED = true;
+        ToggleFeature(X86::FeatureRDSEED);
+      }
     }
   }
 }
@@ -454,6 +458,7 @@
   HasHLE = false;
   HasADX = false;
   HasPRFCHW = false;
+  HasRDSEED = false;
   IsBTMemSlow = false;
   IsUAMemFast = false;
   HasVectorUAMem = false;