diff options
Diffstat (limited to 'sysdeps/i386/i686/hp-timing.h')
| -rw-r--r-- | sysdeps/i386/i686/hp-timing.h | 33 |
1 files changed, 2 insertions, 31 deletions
diff --git a/sysdeps/i386/i686/hp-timing.h b/sysdeps/i386/i686/hp-timing.h index 18e5b95bbe..a4b19c1043 100644 --- a/sysdeps/i386/i686/hp-timing.h +++ b/sysdeps/i386/i686/hp-timing.h @@ -58,13 +58,8 @@ - HP_TIMING_DIFF: compute difference between two times and store it in a third. Source and destination might overlap. - - HP_TIMING_ACCUM: add time difference to another variable. This might - be a bit more complicated to implement for some platforms as the - operation should be thread-safe and 64bit arithmetic on 32bit platforms - is not. - - - HP_TIMING_ACCUM_NT: this is the variant for situations where we know - there are no threads involved. + - HP_TIMING_ACCUM_NT: add time difference to another variable, without + being thread-safe. - HP_TIMING_PRINT: write decimal representation of the timing value into the given string. This operation need not be inline even though @@ -110,30 +105,6 @@ typedef unsigned long long int hp_timing_t; /* It's simple arithmetic for us. */ #define HP_TIMING_DIFF(Diff, Start, End) (Diff) = ((End) - (Start)) -/* We have to jump through hoops to get this correctly implemented. */ -#define HP_TIMING_ACCUM(Sum, Diff) \ - do { \ - int __not_done; \ - hp_timing_t __oldval = (Sum); \ - hp_timing_t __diff = (Diff) - GLRO(dl_hp_timing_overhead); \ - do \ - { \ - hp_timing_t __newval = __oldval + __diff; \ - int __temp0, __temp1; \ - __asm__ __volatile__ ("xchgl %0, %%ebx\n\t" \ - "lock; cmpxchg8b %1\n\t" \ - "sete %%bl\n\t" \ - "xchgl %0, %%ebx" \ - : "=SD" (__not_done), "=m" (Sum), \ - "=A" (__oldval), "=c" (__temp0) \ - : "m" (Sum), "2" (__oldval), \ - "3" ((unsigned int) (__newval >> 32)), \ - "0" ((unsigned int) __newval)); \ - } \ - while ((unsigned char) __not_done); \ - } while (0) - -/* No threads, no extra work. */ #define HP_TIMING_ACCUM_NT(Sum, Diff) (Sum) += (Diff) /* Print the time value. */ |