| /* High precision, low overhead timing functions. Generic version. |
| Copyright (C) 1998-2016 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* In case a platform supports timers in the hardware the following macros |
| and types must be defined: |
| |
| - 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. This type must be integral. |
| |
| - HP_TIMING_NOW: place timestamp for current time in variable given as |
| parameter. |
| */ |
| |
| /* The target supports hp-timing. Share the common infrastructure. */ |
| |
| #include <string.h> |
| #include <sys/param.h> |
| #include <_itoa.h> |
| |
| /* Compute the difference between START and END, storing into DIFF. */ |
| #define HP_TIMING_DIFF(Diff, Start, End) ((Diff) = (End) - (Start)) |
| |
| /* Accumulate ADD into SUM. No attempt is made to be thread-safe. */ |
| #define HP_TIMING_ACCUM_NT(Sum, Diff) ((Sum) += (Diff)) |
| |
| /* Write a decimal representation of the timing value into the given string. */ |
| #define HP_TIMING_PRINT(Dest, Len, Val) \ |
| do { \ |
| char __buf[20]; \ |
| char *__dest = (Dest); \ |
| size_t __len = (Len); \ |
| char *__cp = _itoa ((Val), __buf + sizeof (__buf), 10, 0); \ |
| size_t __cp_len = MIN (__buf + sizeof (__buf) - __cp, __len); \ |
| memcpy (__dest, __cp, __cp_len); \ |
| memcpy (__dest + __cp_len, " cycles", \ |
| MIN (__len - __cp_len, sizeof (" cycles"))); \ |
| __dest[__len - 1] = '\0'; \ |
| } while (0) |