Mercurial > hg > graal-jvmci-8
diff src/cpu/sparc/vm/vm_version_sparc.cpp @ 643:c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
Summary: bitCount() should use POPC on SPARC processors where POPC is implemented directly in hardware.
Reviewed-by: kvn, never
author | twisti |
---|---|
date | Fri, 13 Mar 2009 11:35:17 -0700 |
parents | 660978a2a31a |
children | f6da6f0174ac |
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--- a/src/cpu/sparc/vm/vm_version_sparc.cpp Thu Mar 12 10:37:46 2009 -0700 +++ b/src/cpu/sparc/vm/vm_version_sparc.cpp Fri Mar 13 11:35:17 2009 -0700 @@ -92,10 +92,18 @@ #endif } + // Use hardware population count instruction if available. + if (has_hardware_popc()) { + if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { + UsePopCountInstruction = true; + } + } + char buf[512]; - jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s", + jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s", (has_v8() ? ", has_v8" : ""), (has_v9() ? ", has_v9" : ""), + (has_hardware_popc() ? ", popc" : ""), (has_vis1() ? ", has_vis1" : ""), (has_vis2() ? ", has_vis2" : ""), (is_ultra3() ? ", is_ultra3" : ""),