# HG changeset patch
# User kvn
# Date 1301415111 25200
# Node ID a988a7bb3b8a6865a8cccf086b117ae9f17980e5
# Parent  3d58a49836608606257da0d6546c863b6e75130c
7032133: Enable sse4.2 for new AMD processors
Summary: New AMD processors support sse4.2. Enable corresponding instructions in Hotspot.
Reviewed-by: kvn
Contributed-by: eric.caspole@amd.com

diff -r 3d58a4983660 -r a988a7bb3b8a src/cpu/x86/vm/vm_version_x86.cpp
--- a/src/cpu/x86/vm/vm_version_x86.cpp	Mon Mar 28 03:58:07 2011 -0700
+++ b/src/cpu/x86/vm/vm_version_x86.cpp	Tue Mar 29 09:11:51 2011 -0700
@@ -429,6 +429,11 @@
         UseXmmI2D = false;
       }
     }
+    if( FLAG_IS_DEFAULT(UseSSE42Intrinsics) ) {
+      if( supports_sse4_2() && UseSSE >= 4 ) {
+        UseSSE42Intrinsics = true;
+      }
+    }
 
     // Use count leading zeros count instruction if available.
     if (supports_lzcnt()) {