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6378821: bitCount() should use POPC on SPARC processors and AMD+10h

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BitCount() should use POPC on SPARC processors where POPC is implemented directly in hardware.

Reviewed-by: kvn, never
This commit is contained in:
Christian Thalinger 2009-03-13 11:35:17 -07:00
parent 69f9ddee90
commit de67e52949
16 changed files with 370 additions and 20 deletions
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5
hotspot/src/share/vm/runtime/globals.hpp
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@ -1,5 +1,5 @@
/*
* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
* Copyright 1997-2009 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
@ -2172,6 +2172,9 @@ class CommandLineFlags {
diagnostic(bool, PrintIntrinsics, false, \
"prints attempted and successful inlining of intrinsics") \
\
product(bool, UsePopCountInstruction, false, \
"Use population count instruction") \
\
diagnostic(ccstrlist, DisableIntrinsic, "", \
"do not expand intrinsics whose (internal) names appear here") \
\