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Diffstat (limited to 'REORG.TODO/sysdeps/ia64/hp-timing.h')
| -rw-r--r-- | REORG.TODO/sysdeps/ia64/hp-timing.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ia64/hp-timing.h b/REORG.TODO/sysdeps/ia64/hp-timing.h new file mode 100644 index 0000000000..4af128a1a1 --- /dev/null +++ b/REORG.TODO/sysdeps/ia64/hp-timing.h @@ -0,0 +1,49 @@ +/* High precision, low overhead timing functions. IA-64 version. + Copyright (C) 2001-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 2001. + + 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/>. */ + +#ifndef _HP_TIMING_H +#define _HP_TIMING_H 1 + +/* We always assume having the timestamp register. */ +#define HP_TIMING_AVAIL (1) +#define HP_SMALL_TIMING_AVAIL (1) + +/* We indeed have inlined functions. */ +#define HP_TIMING_INLINE (1) + +/* We use 64bit values for the times. */ +typedef unsigned long int hp_timing_t; + +/* The Itanium/Merced has a bug where the ar.itc register value read + is not correct in some situations. The solution is to read again. + For now we always do this until we know how to recognize a fixed + processor implementation. */ +#define REPEAT_READ(val) __builtin_expect ((long int) val == -1, 0) + +/* That's quite simple. Use the `ar.itc' instruction. */ +#define HP_TIMING_NOW(Var) \ + ({ unsigned long int __itc; \ + do \ + asm volatile ("mov %0=ar.itc" : "=r" (__itc) : : "memory"); \ + while (REPEAT_READ (__itc)); \ + Var = __itc; }) + +#include <hp-timing-common.h> + +#endif /* hp-timing.h */ |