Mercurial > hg > truffle
diff src/share/vm/opto/library_call.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 | 98cb887364d3 |
| children | fbde8ec322d0 |
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--- a/src/share/vm/opto/library_call.cpp Thu Mar 12 10:37:46 2009 -0700 +++ b/src/share/vm/opto/library_call.cpp Fri Mar 13 11:35:17 2009 -0700 @@ -1,5 +1,5 @@ /* - * Copyright 1999-2008 Sun Microsystems, Inc. All Rights Reserved. + * Copyright 1999-2009 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -221,6 +221,7 @@ bool inline_unsafe_CAS(BasicType type); bool inline_unsafe_ordered_store(BasicType type); bool inline_fp_conversions(vmIntrinsics::ID id); + bool inline_bitCount(vmIntrinsics::ID id); bool inline_reverseBytes(vmIntrinsics::ID id); }; @@ -314,6 +315,11 @@ if (!JDK_Version::is_gte_jdk14x_version()) return NULL; break; + case vmIntrinsics::_bitCount_i: + case vmIntrinsics::_bitCount_l: + if (!UsePopCountInstruction) return NULL; + break; + default: break; } @@ -617,6 +623,10 @@ case vmIntrinsics::_longBitsToDouble: return inline_fp_conversions(intrinsic_id()); + case vmIntrinsics::_bitCount_i: + case vmIntrinsics::_bitCount_l: + return inline_bitCount(intrinsic_id()); + case vmIntrinsics::_reverseBytes_i: case vmIntrinsics::_reverseBytes_l: return inline_reverseBytes((vmIntrinsics::ID) intrinsic_id()); @@ -1714,6 +1724,27 @@ } } +//----------------------------inline_bitCount_int/long----------------------- +// inline int Integer.bitCount(int) +// inline int Long.bitCount(long) +bool LibraryCallKit::inline_bitCount(vmIntrinsics::ID id) { + assert(id == vmIntrinsics::_bitCount_i || id == vmIntrinsics::_bitCount_l, "not bitCount"); + if (id == vmIntrinsics::_bitCount_i && !Matcher::has_match_rule(Op_PopCountI)) return false; + if (id == vmIntrinsics::_bitCount_l && !Matcher::has_match_rule(Op_PopCountL)) return false; + _sp += arg_size(); // restore stack pointer + switch (id) { + case vmIntrinsics::_bitCount_i: + push(_gvn.transform(new (C, 2) PopCountINode(pop()))); + break; + case vmIntrinsics::_bitCount_l: + push(_gvn.transform(new (C, 2) PopCountLNode(pop_pair()))); + break; + default: + ShouldNotReachHere(); + } + return true; +} + //----------------------------inline_reverseBytes_int/long------------------- // inline Integer.reverseBytes(int) // inline Long.reverseBytes(long)