hg: jdk7/hotspot-comp/hotspot: 6987135: Performance regression on Intel platform with 32-bits edition between 6u13 and 6u14.
vladimir.kozlov at oracle.com
vladimir.kozlov at oracle.com
Tue Nov 2 13:12:50 PDT 2010
Changeset: ae065c367d93
Author: kvn
Date: 2010-11-02 09:00 -0700
URL: http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/ae065c367d93
6987135: Performance regression on Intel platform with 32-bits edition between 6u13 and 6u14.
Summary: Use hardware DIV instruction for long division by constant when it is faster than code with multiply.
Reviewed-by: never
! src/cpu/sparc/vm/sparc.ad
! src/cpu/sparc/vm/vm_version_sparc.cpp
! src/cpu/sparc/vm/vm_version_sparc.hpp
! src/cpu/x86/vm/assembler_x86.cpp
! src/cpu/x86/vm/vm_version_x86.hpp
! src/cpu/x86/vm/x86_32.ad
! src/cpu/x86/vm/x86_64.ad
! src/os_cpu/solaris_sparc/vm/vm_version_solaris_sparc.cpp
! src/share/vm/opto/divnode.cpp
! src/share/vm/opto/matcher.hpp
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