Mercurial > hg > graal-compiler
comparison src/os_cpu/linux_x86/vm/os_linux_x86.hpp @ 4749:7ab5f6318694
7125934: Add a fast unordered timestamp capability to Hotspot on x86/x64
Summary: Add rdtsc detection and inline generation.
Reviewed-by: kamg, dholmes
Contributed-by: karen.kinnear@oracle.com
author | phh |
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date | Sun, 01 Jan 2012 11:17:59 -0500 |
parents | f95d63e2154a |
children | b9a9ed0f8eeb |
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4732:4ec93d767458 | 4749:7ab5f6318694 |
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1 /* | 1 /* |
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. | 2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | 4 * |
5 * This code is free software; you can redistribute it and/or modify it | 5 * This code is free software; you can redistribute it and/or modify it |
6 * under the terms of the GNU General Public License version 2 only, as | 6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. | 7 * published by the Free Software Foundation. |
26 #define OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP | 26 #define OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP |
27 | 27 |
28 static void setup_fpu(); | 28 static void setup_fpu(); |
29 static bool supports_sse(); | 29 static bool supports_sse(); |
30 | 30 |
31 static jlong rdtsc(); | |
32 | |
31 static bool is_allocatable(size_t bytes); | 33 static bool is_allocatable(size_t bytes); |
32 | 34 |
33 // Used to register dynamic code cache area with the OS | 35 // Used to register dynamic code cache area with the OS |
34 // Note: Currently only used in 64 bit Windows implementations | 36 // Note: Currently only used in 64 bit Windows implementations |
35 static bool register_code_area(char *low, char *high) { return true; } | 37 static bool register_code_area(char *low, char *high) { return true; } |