diff options
Diffstat (limited to 'sysdeps/ia64/hp-timing.h')
| -rw-r--r-- | sysdeps/ia64/hp-timing.h | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/sysdeps/ia64/hp-timing.h b/sysdeps/ia64/hp-timing.h index ed1dc6067e..da2cd8e9c6 100644 --- a/sysdeps/ia64/hp-timing.h +++ b/sysdeps/ia64/hp-timing.h @@ -92,11 +92,7 @@ extern hp_timing_t __libc_hp_timing_overhead; processor implementation. */ #define REPEAT_READ(val) __builtin_expect ((int) val == -1, 0) -/* That's quite simple. Use the `rdtsc' instruction. Note that the value - might not be 100% accurate since there might be some more instructions - running in this moment. This could be changed by using a barrier like - 'cpuid' right before the `rdtsc' instruciton. But we are not interested - in accurate clock cycles here so we don't do this. */ +/* That's quite simple. Use the `ar.itc' instruction. */ #define HP_TIMING_NOW(Var) \ ({ unsigned long int __itc; \ do \ |