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annotate src/os_cpu/linux_x86/vm/os_linux_x86.inline.hpp @ 21947:9f70fc90169d

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Truffle: remove expensive assertion
author Andreas Woess <andreas.woess@oracle.com>
date Wed, 17 Jun 2015 04:09:30 +0200
parents b9a9ed0f8eeb
children
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1 /*
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2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef OS_CPU_LINUX_X86_VM_OS_LINUX_X86_INLINE_HPP
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26 #define OS_CPU_LINUX_X86_VM_OS_LINUX_X86_INLINE_HPP
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27
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28 #include "runtime/os.hpp"
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29
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30 // See http://www.technovelty.org/code/c/reading-rdtsc.htl for details
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31 inline jlong os::rdtsc() {
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32 #ifndef AMD64
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33 // 64 bit result in edx:eax
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34 uint64_t res;
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35 __asm__ __volatile__ ("rdtsc" : "=A" (res));
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36 return (jlong)res;
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37 #else
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38 uint64_t res;
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39 uint32_t ts1, ts2;
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40 __asm__ __volatile__ ("rdtsc" : "=a" (ts1), "=d" (ts2));
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41 res = ((uint64_t)ts1 | (uint64_t)ts2 << 32);
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42 return (jlong)res;
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43 #endif // AMD64
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44 }
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45
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46 #endif // OS_CPU_LINUX_X86_VM_OS_LINUX_X86_INLINE_HPP