Xenomai  3.0.8
tsc.h
1 /*
2  * Copyright (C) 2001,2002,2003,2007 Philippe Gerum <rpm@xenomai.org>.
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
17  */
18 
19 #ifndef _LIB_COBALT_X86_TSC_H
20 #define _LIB_COBALT_X86_TSC_H
21 
22 static inline unsigned long long cobalt_read_tsc(void)
23 {
24 #ifdef __i386__
25  unsigned long long t;
26 
27  __asm__ __volatile__ ("rdtsc" : "=A" (t));
28  return t;
29 
30 #else /* x86_64 */
31  unsigned int __a,__d;
32 
33  __asm__ __volatile__ ("rdtsc" : "=a" (__a), "=d" (__d));
34  return ((unsigned long)__a) | (((unsigned long)__d) << 32);
35 #endif /* x86_64 */
36 }
37 
38 #endif /* !_LIB_COBALT_X86_TSC_H */