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
--- a/hotspot/src/cpu/x86/vm/vm_version_x86.cpp Mon Mar 28 03:58:07 2011 -0700
+++ b/hotspot/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()) {