diff options
Diffstat (limited to 'sysdeps/aarch64')
| -rw-r--r-- | sysdeps/aarch64/hp-timing.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sysdeps/aarch64/hp-timing.h b/sysdeps/aarch64/hp-timing.h new file mode 100644 index 0000000000..4267d2c53a --- /dev/null +++ b/sysdeps/aarch64/hp-timing.h @@ -0,0 +1,37 @@ +/* High precision, low overhead timing functions. AArch64 version. + Copyright (C) 2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 cycle counter 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; + +/* Sync the instruction stream, and read from the virtual cycle counter. */ +#define HP_TIMING_NOW(Var) \ + __asm__ __volatile__ ("isb; mrs %0, cntvct_el0" : "=r" (Var)) + +#include <hp-timing-common.h> + +#endif /* hp-timing.h */ |