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Diffstat (limited to 'sysdeps/powerpc/powerpc64/hp-timing.h')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/hp-timing.h | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/sysdeps/powerpc/powerpc64/hp-timing.h b/sysdeps/powerpc/powerpc64/hp-timing.h deleted file mode 100644 index b58cca9003..0000000000 --- a/sysdeps/powerpc/powerpc64/hp-timing.h +++ /dev/null @@ -1,136 +0,0 @@ -/* High precision, low overhead timing functions. powerpc64 version. - Copyright (C) 2005 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _HP_TIMING_H -#define _HP_TIMING_H 1 - -#include <string.h> -#include <sys/param.h> -#include <stdio-common/_itoa.h> -#include <atomic.h> - -/* The macros defined here use the powerpc 64-bit time base register. - The time base is nominally clocked at 1/8th the CPU clock, but this - can vary. - - The list of macros we need includes the following: - - - HP_TIMING_AVAIL: test for availability. - - - HP_TIMING_INLINE: this macro is non-zero if the functionality is not - implemented using function calls but instead uses some inlined code - which might simply consist of a few assembler instructions. We have to - know this since we might want to use the macros here in places where we - cannot make function calls. - - - hp_timing_t: This is the type for variables used to store the time - values. - - - HP_TIMING_ZERO: clear `hp_timing_t' object. - - - HP_TIMING_NOW: place timestamp for current time in variable given as - parameter. - - - HP_TIMING_DIFF_INIT: do whatever is necessary to be able to use the - HP_TIMING_DIFF macro. - - - 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_PRINT: write decimal representation of the timing value into - the given string. This operation need not be inline even though - HP_TIMING_INLINE is specified. - -*/ - -/* We always assume having the timestamp register. */ -#define HP_TIMING_AVAIL (1) - -/* We indeed have inlined functions. */ -#define HP_TIMING_INLINE (1) - -/* We use 64bit values for the times. */ -typedef unsigned long long int hp_timing_t; - -/* Set timestamp value to zero. */ -#define HP_TIMING_ZERO(Var) (Var) = (0) - -/* That's quite simple. Use the `mftb' 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 - 'lwsync' right before the `mftb' instruciton. But we are not interested - in accurate clock cycles here so we don't do this. */ -#define HP_TIMING_NOW(Var) __asm__ __volatile__ ("mftb %0" : "=r" (Var)) - -/* Use two 'mftb' instructions in a row to find out how long it takes. - On current POWER4, POWER5, and 970 processors mftb take ~10 cycles. */ -#define HP_TIMING_DIFF_INIT() \ - do { \ - if (GLRO(dl_hp_timing_overhead) == 0) \ - { \ - int __cnt = 5; \ - GLRO(dl_hp_timing_overhead) = ~0ull; \ - do \ - { \ - hp_timing_t __t1, __t2; \ - HP_TIMING_NOW (__t1); \ - HP_TIMING_NOW (__t2); \ - if (__t2 - __t1 < GLRO(dl_hp_timing_overhead)) \ - GLRO(dl_hp_timing_overhead) = __t2 - __t1; \ - } \ - while (--__cnt > 0); \ - } \ - } while (0) - -/* It's simple arithmetic in 64-bit. */ -#define HP_TIMING_DIFF(Diff, Start, End) (Diff) = ((End) - (Start)) - -/* We need to insure that this add is atomic in threaded environments. We use - __arch_atomic_exchange_and_add_64 from atomic.h to get thread safety. */ -#define HP_TIMING_ACCUM(Sum, Diff) \ - do { \ - hp_timing_t __diff = (Diff) - GLRO(dl_hp_timing_overhead); \ - __arch_atomic_exchange_and_add_64 (&(Sum), __diff); \ - } while (0) - -/* No threads, no extra work. */ -#define HP_TIMING_ACCUM_NT(Sum, Diff) (Sum) += (Diff) - -/* Print the time value. */ -#define HP_TIMING_PRINT(Buf, Len, Val) \ - do { \ - char __buf[20]; \ - char *__cp = _itoa (Val, __buf + sizeof (__buf), 10, 0); \ - size_t __len = (Len); \ - char *__dest = (Buf); \ - while (__len-- > 0 && __cp < __buf + sizeof (__buf)) \ - *__dest++ = *__cp++; \ - memcpy (__dest, " ticks", MIN (__len, sizeof (" ticks"))); \ - } while (0) - -#endif /* hp-timing.h */ |