globals_x86.hpp revision 844:bd02caa94611 
1161754Sru/*
288276Smarkm * Copyright 2000-2009 Sun Microsystems, Inc.  All Rights Reserved.
388276Smarkm * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
47527Sjkh *
57527Sjkh * This code is free software; you can redistribute it and/or modify it
67527Sjkh * under the terms of the GNU General Public License version 2 only, as
77527Sjkh * published by the Free Software Foundation.
87527Sjkh *
97527Sjkh * This code is distributed in the hope that it will be useful, but WITHOUT
107527Sjkh * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
117527Sjkh * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
127527Sjkh * version 2 for more details (a copy is included in the LICENSE file that
137527Sjkh * accompanied this code).
147527Sjkh *
157527Sjkh * You should have received a copy of the GNU General Public License version
16161754Sru * 2 along with this work; if not, write to the Free Software Foundation,
177527Sjkh * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
187527Sjkh *
197527Sjkh * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
207527Sjkh * CA 95054 USA or visit www.sun.com if you need additional information or
217527Sjkh * have any questions.
227527Sjkh *
237527Sjkh */
247527Sjkh
257527Sjkh//
267527Sjkh// Sets the default values for platform dependent flags used by the runtime system.
277527Sjkh// (see globals.hpp)
287527Sjkh//
297527Sjkh
307527Sjkhdefine_pd_global(bool,  ConvertSleepToYield,      true);
317527Sjkhdefine_pd_global(bool,  ShareVtableStubs,         true);
327527Sjkhdefine_pd_global(bool,  CountInterpCalls,         true);
3388276Smarkm
3488276Smarkmdefine_pd_global(bool, ImplicitNullChecks,          true);  // Generate code for implicit null checks
3588276Smarkmdefine_pd_global(bool, UncommonNullCast,            true);  // Uncommon-trap NULLs past to check cast
367527Sjkh
3728365Scharnier// See 4827828 for this change. There is no globals_core_i486.hpp. I can't
387527Sjkh// assign a different value for C2 without touching a number of files. Use
39161754Sru// #ifdef to minimize the change as it's late in Mantis. -- FIXME.
4028365Scharnier// c1 doesn't have this problem because the fix to 4858033 assures us
417527Sjkh// the the vep is aligned at CodeEntryAlignment whereas c2 only aligns
427527Sjkh// the uep and the vep doesn't get real alignment but just slops on by
437527Sjkh// only assured that the entry instruction meets the 5 byte size requirement.
447527Sjkh#ifdef COMPILER2
457527Sjkhdefine_pd_global(intx,  CodeEntryAlignment,       32);
467527Sjkh#else
477527Sjkhdefine_pd_global(intx,  CodeEntryAlignment,       16);
487527Sjkh#endif // COMPILER2
497527Sjkh
507527Sjkhdefine_pd_global(bool, NeedsDeoptSuspend,           false); // only register window machines need this
517527Sjkh
527527Sjkhdefine_pd_global(uintx, TLABSize,                 0);
537527Sjkh#ifdef AMD64
547527Sjkhdefine_pd_global(uintx, NewSize, ScaleForWordSize(2048 * K));
557527Sjkh// Very large C++ stack frames using solaris-amd64 optimized builds
567527Sjkh// due to lack of optimization caused by C++ compiler bugs
577527Sjkhdefine_pd_global(intx, StackShadowPages, SOLARIS_ONLY(20) NOT_SOLARIS(6) DEBUG_ONLY(+2));
587527Sjkh#else
597527Sjkhdefine_pd_global(uintx, NewSize,                  1024 * K);
607527Sjkhdefine_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));
617527Sjkh#endif // AMD64
627527Sjkhdefine_pd_global(intx,  InlineFrequencyCount,     100);
637527Sjkhdefine_pd_global(intx,  InlineSmallCode,          1000);
647527Sjkhdefine_pd_global(intx,  PreInflateSpin,           10);
657527Sjkh
667527Sjkhdefine_pd_global(intx, StackYellowPages, 2);
677527Sjkhdefine_pd_global(intx, StackRedPages, 1);
687527Sjkh
697527Sjkhdefine_pd_global(bool, RewriteBytecodes,     true);
707527Sjkhdefine_pd_global(bool, RewriteFrequentPairs, true);
717527Sjkh