This patch implements time.c on NVPTX with the %clock64 register. The PTX documentation describes %globaltimer as explicitely off-limits for us.
* config/nvptx/time.c: New. --- libgomp/ChangeLog.gomp-nvptx | 4 ++++ libgomp/config/nvptx/time.c | 49 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+) diff --git a/libgomp/config/nvptx/time.c b/libgomp/config/nvptx/time.c index e69de29..08feafe 100644 --- a/libgomp/config/nvptx/time.c +++ b/libgomp/config/nvptx/time.c @@ -0,0 +1,49 @@ +/* Copyright (C) 2015 Free Software Foundation, Inc. + Contributed by Dmitry Melnik <d...@ispras.ru> + + This file is part of the GNU Offloading and Multi Processing Library + (libgomp). + + Libgomp is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + Libgomp 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 General Public License for + more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +/* This file implements timer routines for NVPTX. It uses the %clock64 cycle + counter. */ + +#include "libgomp.h" + +/* This is set from host in plugin-nvptx.c. */ +double __nvptx_clocktick = 0; + +double +omp_get_wtime (void) +{ + uint64_t clock; + asm ("mov.u64 %0, %%clock64;" : "=r" (clock)); + return clock * __nvptx_clocktick; +} + +double +omp_get_wtick (void) +{ + return __nvptx_clocktick; +} + +ialias (omp_get_wtime) +ialias (omp_get_wtick)