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diff src/cpu/x86/vm/vm_version_x86_64.cpp @ 71:3d62cb85208d

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6662967: Optimize I2D conversion on new x86 Summary: Use CVTDQ2PS and CVTDQ2PD for integer values conversions to float and double values on new AMD cpu. Reviewed-by: sgoldman, never
author kvn
date Wed, 19 Mar 2008 15:33:25 -0700
parents a61af66fc99e
children d1605aabd0a1
line wrap: on
line diff
--- a/src/cpu/x86/vm/vm_version_x86_64.cpp	Wed Mar 19 15:14:36 2008 -0700
+++ b/src/cpu/x86/vm/vm_version_x86_64.cpp	Wed Mar 19 15:33:25 2008 -0700
@@ -265,6 +265,20 @@
         UseXmmRegToRegMoveAll = false;
       }
     }
+    if( FLAG_IS_DEFAULT(UseXmmI2F) ) {
+      if( supports_sse4a() ) {
+        UseXmmI2F = true;
+      } else {
+        UseXmmI2F = false;
+      }
+    }
+    if( FLAG_IS_DEFAULT(UseXmmI2D) ) {
+      if( supports_sse4a() ) {
+        UseXmmI2D = true;
+      } else {
+        UseXmmI2D = false;
+      }
+    }
   }
 
   if( is_intel() ) { // Intel cpus specific settings