diff options
Diffstat (limited to 'sysdeps/x86/hp-timing.h')
| -rw-r--r-- | sysdeps/x86/hp-timing.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/sysdeps/x86/hp-timing.h b/sysdeps/x86/hp-timing.h index 1c20e9d..77a1360 100644 --- a/sysdeps/x86/hp-timing.h +++ b/sysdeps/x86/hp-timing.h @@ -22,8 +22,6 @@ #include <isa.h> #if MINIMUM_ISA == 686 || MINIMUM_ISA == 8664 -# include <x86intrin.h> - /* We always assume having the timestamp register. */ # define HP_TIMING_AVAIL (1) # define HP_SMALL_TIMING_AVAIL (1) @@ -38,8 +36,11 @@ typedef unsigned long long int hp_timing_t; 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. */ -# define HP_TIMING_NOW(Var) ((Var) = _rdtsc ()) + in accurate clock cycles here so we don't do this. + + NB: Use __builtin_ia32_rdtsc directly since including <x86intrin.h> + makes building glibc very slow. */ +# define HP_TIMING_NOW(Var) ((Var) = __builtin_ia32_rdtsc ()) # include <hp-timing-common.h> #else |