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/* Copyright (C) 2015-2022 Free Software Foundation, Inc.
Contributed by Mentor Embedded.
This file is part of the GNU Offloading and Multi Processing Library
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
<>. */
/* This is a simplified barrier that is suitable for thread pool
synchronizaton. Only a subset of full barrier API (bar.h) is exposed.
Here in the AMD GCN-specific implementation, we expect that thread pool
corresponds to the wavefronts within a work group. */
/* AMD GCN has no use for this type. */
typedef int gomp_simple_barrier_t;
/* GCN barriers block all wavefronts, so the count is not interesting. */
static inline void
gomp_simple_barrier_init (gomp_simple_barrier_t *bar, unsigned count)
static inline void
gomp_simple_barrier_destroy (gomp_simple_barrier_t *bar)
static inline void
gomp_simple_barrier_wait (gomp_simple_barrier_t *bar)
asm volatile ("s_barrier" ::: "memory");
static inline void
gomp_simple_barrier_wait_last (gomp_simple_barrier_t *bar)
/* GCN has no way to signal a barrier without waiting. */
asm volatile ("s_barrier" ::: "memory");