diff options
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/hp-timing.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sysdeps/x86_64/hp-timing.h b/sysdeps/x86_64/hp-timing.h index 5738039fa4..e015ff79db 100644 --- a/sysdeps/x86_64/hp-timing.h +++ b/sysdeps/x86_64/hp-timing.h @@ -1,5 +1,5 @@ /* High precision, low overhead timing functions. x86-64 version. - Copyright (C) 2002 Free Software Foundation, Inc. + Copyright (C) 2002, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -25,7 +25,8 @@ /* The "=A" constraint used in 32-bit mode does not work in 64-bit mode. */ # undef HP_TIMING_NOW # define HP_TIMING_NOW(Var) \ - ({ unsigned int _hi, _lo; asm ("rdtsc" : "=a" (_lo), "=d" (_hi)); \ + ({ unsigned int _hi, _lo; \ + asm volatile ("rdtsc" : "=a" (_lo), "=d" (_hi)); \ (Var) = ((unsigned long long int) _hi << 32) | _lo; }) /* The funny business for 32-bit mode is not required here. */ |