1/* Copyright (C) 2015-2020 Free Software Foundation, Inc. 2 Contributed by Alexander Monakov <amonakov@ispras.ru> 3 4 This file is part of the GNU Offloading and Multi Processing Library 5 (libgomp). 6 7 Libgomp is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 14 FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 more details. 16 17 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 <http://www.gnu.org/licenses/>. */ 25 26/* This is a simplified barrier that is suitable for thread pool 27 synchronizaton. Only a subset of full barrier API (bar.h) is exposed. 28 Here in the NVPTX-specific implementation, we expect that thread pool 29 corresponds to a PTX CTA (thread block). */ 30 31#ifndef GOMP_SIMPLE_BARRIER_H 32#define GOMP_SIMPLE_BARRIER_H 1 33 34typedef struct 35{ 36 unsigned count; 37} gomp_simple_barrier_t; 38 39static inline void 40gomp_simple_barrier_init (gomp_simple_barrier_t *bar, unsigned count) 41{ 42 bar->count = count * 32; 43} 44 45/* Unused on NVPTX. 46static inline void 47gomp_simple_barrier_reinit (gomp_simple_barrier_t *bar, unsigned count) 48{ 49 bar->count = count * 32; 50} 51*/ 52 53static inline void 54gomp_simple_barrier_destroy (gomp_simple_barrier_t *bar) 55{ 56} 57 58static inline void 59gomp_simple_barrier_wait (gomp_simple_barrier_t *bar) 60{ 61 asm volatile ("bar.sync 0, %0;" : : "r" (bar->count) : "memory"); 62} 63 64static inline void 65gomp_simple_barrier_wait_last (gomp_simple_barrier_t *bar) 66{ 67 asm volatile ("bar.arrive 0, %0;" : : "r" (bar->count) : "memory"); 68} 69 70#endif /* GOMP_SIMPLE_BARRIER_H */ 71