hotspot/src/cpu/sparc/vm/stubRoutines_sparc.cpp
author twisti
Fri, 13 Feb 2009 09:09:35 -0800
changeset 2031 24e034f56dcb
parent 1 489c9b5090e2
child 5547 f4b087cbb361
permissions -rw-r--r--
6800154: Add comments to long_by_long_mulhi() for better understandability Summary: This patch adds a comment pointing to the Hacker's Delight version of the algorithm plus a verbatim copy of it. Furthermore it adds inline comments. Reviewed-by: kvn, jrose
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/*
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 * Copyright 1997-2007 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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#include "incls/_precompiled.incl"
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#include "incls/_stubRoutines_sparc.cpp.incl"
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// Implementation of the platform-specific part of StubRoutines - for
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// a description of how to extend it, see the stubRoutines.hpp file.
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extern "C" {
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  address _flush_reg_windows();   // in .s file.
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  // Flush registers to stack. In case of error we will need to stack walk.
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  address bootstrap_flush_windows(void) {
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    Thread* thread = ThreadLocalStorage::get_thread_slow();
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    // Very early in process there is no thread.
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    if (thread != NULL) {
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      guarantee(thread->is_Java_thread(), "Not a Java thread.");
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      JavaThread* jt = (JavaThread*)thread;
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      guarantee(!jt->has_last_Java_frame(), "Must be able to flush registers!");
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    }
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    return (address)_flush_reg_windows();
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  };
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};
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address StubRoutines::Sparc::_test_stop_entry = NULL;
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address StubRoutines::Sparc::_stop_subroutine_entry = NULL;
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address StubRoutines::Sparc::_flush_callers_register_windows_entry = CAST_FROM_FN_PTR(address, bootstrap_flush_windows);
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address StubRoutines::Sparc::_partial_subtype_check = NULL;
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int StubRoutines::Sparc::_atomic_memory_operation_lock = StubRoutines::Sparc::unlocked;
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int StubRoutines::Sparc::_v8_oop_lock_cache[StubRoutines::Sparc::nof_v8_oop_lock_cache_entries];