Mercurial > jdk8-mips64-public > hotspot / changeset

changeset

7032133: Enable sse4.2 for new AMD processors

Tue, 29 Mar 2011 09:11:51 -0700

author
kvn
date
Tue, 29 Mar 2011 09:11:51 -0700
changeset 2688
a988a7bb3b8a
parent 2687
3d58a4983660
child 2689
b1c22848507b

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

src/cpu/x86/vm/vm_version_x86.cpp file | annotate | diff | comparison | revisions 
     1.1 --- a/src/cpu/x86/vm/vm_version_x86.cpp	Mon Mar 28 03:58:07 2011 -0700
     1.2 +++ b/src/cpu/x86/vm/vm_version_x86.cpp	Tue Mar 29 09:11:51 2011 -0700
     1.3 @@ -429,6 +429,11 @@
     1.4          UseXmmI2D = false;
     1.5        }
     1.6      }
     1.7 +    if( FLAG_IS_DEFAULT(UseSSE42Intrinsics) ) {
     1.8 +      if( supports_sse4_2() && UseSSE >= 4 ) {
     1.9 +        UseSSE42Intrinsics = true;
    1.10 +      }
    1.11 +    }
    1.12  
    1.13      // Use count leading zeros count instruction if available.
    1.14      if (supports_lzcnt()) {

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