71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/* Copyright (C) 2015-2020 Free Software Foundation, Inc.
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Contributed by Alexander Monakov <amonakov@ispras.ru>
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This file is part of the GNU Offloading and Multi Processing Library
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(libgomp).
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Libgomp is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* This is a simplified barrier that is suitable for thread pool
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synchronizaton. Only a subset of full barrier API (bar.h) is exposed.
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Here in the NVPTX-specific implementation, we expect that thread pool
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corresponds to a PTX CTA (thread block). */
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#ifndef GOMP_SIMPLE_BARRIER_H
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#define GOMP_SIMPLE_BARRIER_H 1
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typedef struct
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{
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unsigned count;
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} gomp_simple_barrier_t;
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static inline void
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gomp_simple_barrier_init (gomp_simple_barrier_t *bar, unsigned count)
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{
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bar->count = count * 32;
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}
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/* Unused on NVPTX.
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static inline void
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gomp_simple_barrier_reinit (gomp_simple_barrier_t *bar, unsigned count)
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{
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bar->count = count * 32;
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}
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*/
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static inline void
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gomp_simple_barrier_destroy (gomp_simple_barrier_t *bar)
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{
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}
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static inline void
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gomp_simple_barrier_wait (gomp_simple_barrier_t *bar)
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{
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asm volatile ("bar.sync 0, %0;" : : "r" (bar->count) : "memory");
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}
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static inline void
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gomp_simple_barrier_wait_last (gomp_simple_barrier_t *bar)
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{
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asm volatile ("bar.arrive 0, %0;" : : "r" (bar->count) : "memory");
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}
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#endif /* GOMP_SIMPLE_BARRIER_H */
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