/*
* Copyright (c)
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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, but WITHOUT
* ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY
or
* 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
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Public License version
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2 along
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#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