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* Copyright ( c ) 2011 , 2019 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
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*
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* 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 in the file that
* accompanied this code ) .
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* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
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#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__ _(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 | ( *
return
#endif // AMD64
}
#endif // OS_CPU_LINUX_X86_OS_LINUX_X86_INLINE_HPP
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