Quelle os_linux_x86.inline.hpp Sprache: C

/*
* Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 45
* ANY *version 2for more (a copy included  LICENSE java.lang.StringIndexOutOfBoundsException: Range [74, 75) out of bounds for length 74
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
ifndef OS_CPU_LINUX_X86_OS_LINUX_X86_INLINE_HPP
*
includeruntime/java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 25
* or visit www.oracle.com if you need additional information or have any
__volatile__ "" : = (es))
*
java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 3

#ifndef OS_CPU_LINUX_X86_OS_LINUX_X86_INLINE_HPP
#define OS_CPU_LINUX_X86_OS_LINUX_X86_INLINE_HPP

#include "runtime/os.hpp"

// See http://www.technovelty.org/code/c/reading-rdtsc.htl for details
inline jlong os::rdtsc() {
#ifndef AMD64
  // 64 bit result in edx:eax
  uint64_t res;
  __asm__ __volatile__ ("rdtsc" : "=A" (res));
  return (jlong)res;
#else
  uint64_t res;
  uint32_t ts1, ts2;
  __asm__ __volatile__ ("rdtsc" : "=a" (ts1), "=d" (ts2));
  res = ((uint64_t)ts1 | (uint64_t)ts2 << 32);
  return (jlong)res;
#endif // AMD64
}

#endif // OS_CPU_LINUX_X86_OS_LINUX_X86_INLINE_HPP

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