Mercurial > hg > graal-jvmci-8
changeset 12297:586fa1919a89
8014911: Should use SUPPORTS_NATIVE_CX8 define to help C/C++ compiler elide blocks of code
Summary: If SUPPORTS_NATIVE_CX8 true then supports_cx8() function hard coded to return 'true'
Reviewed-by: kvn, twisti, dholmes
author | bpittore |
---|---|
date | Fri, 20 Sep 2013 15:06:23 -0400 |
parents | 10efeefa6485 |
children | 504d8f519adf d68894a09c7c |
files | src/share/vm/runtime/vm_version.hpp |
diffstat | 1 files changed, 7 insertions(+), 1 deletions(-) [+] |
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--- a/src/share/vm/runtime/vm_version.hpp Fri Sep 13 21:36:27 2013 -0400 +++ b/src/share/vm/runtime/vm_version.hpp Fri Sep 20 15:06:23 2013 -0400 @@ -78,7 +78,13 @@ static const char* jre_release_version(); // does HW support an 8-byte compare-exchange operation? - static bool supports_cx8() {return _supports_cx8;} + static bool supports_cx8() { +#ifdef SUPPORTS_NATIVE_CX8 + return true; +#else + return _supports_cx8; +#endif + } // does HW support atomic get-and-set or atomic get-and-add? Used // to guide intrinsification decisions for Unsafe atomic ops static bool supports_atomic_getset4() {return _supports_atomic_getset4;}