hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.hpp
author never
Tue, 13 Oct 2009 12:04:21 -0700
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child 4907 801a5ee1621c
permissions -rw-r--r--
6890308: integrate zero assembler hotspot changes Reviewed-by: never Contributed-by: gbenson@redhat.com
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/*
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 * Copyright 2003-2004 Sun Microsystems, Inc.  All Rights Reserved.
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 * Copyright 2007, 2008 Red Hat, Inc.
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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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  static void setup_fpu() {}
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  static bool is_allocatable(size_t bytes);
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  // Used to register dynamic code cache area with the OS
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  // Note: Currently only used in 64 bit Windows implementations
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  static bool register_code_area(char *low, char *high) { return true; }
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  // Atomically copy 64 bits of data
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  static void atomic_copy64(volatile void *src, volatile void *dst) {
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#if defined(PPC) && !defined(_LP64)
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    double tmp;
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    asm volatile ("lfd  %0, 0(%1)\n"
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                  "stfd %0, 0(%2)\n"
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                  : "=f"(tmp)
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                  : "b"(src), "b"(dst));
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#else
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    *(jlong *) dst = *(jlong *) src;
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#endif // PPC && !_LP64
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  }