| /* |
| * Copyright (c) 2011, 2012, 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 of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef OS_CPU_LINUX_X86_VM_OS_LINUX_X86_INLINE_HPP |
| #define OS_CPU_LINUX_X86_VM_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_VM_OS_LINUX_X86_INLINE_HPP |