Mercurial > hg > truffle
diff src/cpu/x86/vm/x86_64.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 | c517646eef23 |
line wrap: on
line diff
--- a/src/cpu/x86/vm/x86_64.ad Thu Mar 12 10:37:46 2009 -0700 +++ b/src/cpu/x86/vm/x86_64.ad Fri Mar 13 11:35:17 2009 -0700 @@ -7429,6 +7429,56 @@ ins_pipe( ialu_mem_reg ); %} + +//---------- Population Count Instructions ------------------------------------- + +instruct popCountI(rRegI dst, rRegI src) %{ + predicate(UsePopCountInstruction); + match(Set dst (PopCountI src)); + + format %{ "popcnt $dst, $src" %} + ins_encode %{ + __ popcntl($dst$$Register, $src$$Register); + %} + ins_pipe(ialu_reg); +%} + +instruct popCountI_mem(rRegI dst, memory mem) %{ + predicate(UsePopCountInstruction); + match(Set dst (PopCountI (LoadI mem))); + + format %{ "popcnt $dst, $mem" %} + ins_encode %{ + __ popcntl($dst$$Register, $mem$$Address); + %} + ins_pipe(ialu_reg); +%} + +// Note: Long.bitCount(long) returns an int. +instruct popCountL(rRegI dst, rRegL src) %{ + predicate(UsePopCountInstruction); + match(Set dst (PopCountL src)); + + format %{ "popcnt $dst, $src" %} + ins_encode %{ + __ popcntq($dst$$Register, $src$$Register); + %} + ins_pipe(ialu_reg); +%} + +// Note: Long.bitCount(long) returns an int. +instruct popCountL_mem(rRegI dst, memory mem) %{ + predicate(UsePopCountInstruction); + match(Set dst (PopCountL (LoadL mem))); + + format %{ "popcnt $dst, $mem" %} + ins_encode %{ + __ popcntq($dst$$Register, $mem$$Address); + %} + ins_pipe(ialu_reg); +%} + + //----------MemBar Instructions----------------------------------------------- // Memory barrier flavors