Mercurial > hg > truffle
diff src/cpu/sparc/vm/sparc.ad @ 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 | bd441136a5ce |
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--- a/src/cpu/sparc/vm/sparc.ad Thu Mar 12 10:37:46 2009 -0700 +++ b/src/cpu/sparc/vm/sparc.ad Fri Mar 13 11:35:17 2009 -0700 @@ -9015,6 +9015,33 @@ ins_pipe(long_memory_op); %} + +//---------- Population Count Instructions ------------------------------------- + +instruct popCountI(iRegI dst, iRegI src) %{ + predicate(UsePopCountInstruction); + match(Set dst (PopCountI src)); + + format %{ "POPC $src, $dst" %} + ins_encode %{ + __ popc($src$$Register, $dst$$Register); + %} + ins_pipe(ialu_reg); +%} + +// Note: Long.bitCount(long) returns an int. +instruct popCountL(iRegI dst, iRegL src) %{ + predicate(UsePopCountInstruction); + match(Set dst (PopCountL src)); + + format %{ "POPC $src, $dst" %} + ins_encode %{ + __ popc($src$$Register, $dst$$Register); + %} + ins_pipe(ialu_reg); +%} + + // ============================================================================ //------------Bytes reverse--------------------------------------------------