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comparison src/os_cpu/linux_zero/vm/os_linux_zero.hpp @ 1010:354d3184f6b2

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6890308: integrate zero assembler hotspot changes Reviewed-by: never Contributed-by: gbenson@redhat.com
author never
date Tue, 13 Oct 2009 12:04:21 -0700
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children 3b687c53c266
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1009:03b336640699 1010:354d3184f6b2
1 /*
2 * Copyright 2003-2004 Sun Microsystems, Inc. All Rights Reserved.
3 * Copyright 2007, 2008 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 */
25
26 static void setup_fpu() {}
27
28 static bool is_allocatable(size_t bytes);
29
30 // Used to register dynamic code cache area with the OS
31 // Note: Currently only used in 64 bit Windows implementations
32 static bool register_code_area(char *low, char *high) { return true; }
33
34 // Atomically copy 64 bits of data
35 static void atomic_copy64(volatile void *src, volatile void *dst) {
36 #if defined(PPC) && !defined(_LP64)
37 double tmp;
38 asm volatile ("lfd %0, 0(%1)\n"
39 "stfd %0, 0(%2)\n"
40 : "=f"(tmp)
41 : "b"(src), "b"(dst));
42 #else
43 *(jlong *) dst = *(jlong *) src;
44 #endif // PPC && !_LP64
45 }