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/* Copyright (C) 2012-2016 Free Software Foundation, Inc.
This file is part of the UPC runtime library.
Written by Gary Funck <gary@intrepid.com>
and Nenad Vukicevic <nenad@intrepid.com>
This file is part of GCC.
GCC 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.
GCC 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/>. */
/*****************************************************************************/
/* */
/* Copyright (c) 2004, Michigan Technological University */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions */
/* are met: */
/* */
/* * Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* * Redistributions in binary form must reproduce the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer in the documentation and/or other materials provided */
/* with the distribution. */
/* * Neither the name of the Michigan Technological University */
/* nor the names of its contributors may be used to endorse or promote */
/* products derived from this software without specific prior written */
/* permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A */
/* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER */
/* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, */
/* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, */
/* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR */
/* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */
/* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */
/* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS */
/* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* */
/*****************************************************************************/
#include <upc.h>
#include <upc_collective.h>
#include <upc_coll.h>
/*****************************************************************************/
/* */
/* UPC collective function library, reference implementation */
/* */
/* Steve Seidel, Dept. of Computer Science, Michigan Technological Univ. */
/* steve@mtu.edu March 1, 2004 */
/* */
/*****************************************************************************/
void
upc_all_exchange (shared void *dst,
shared const void *src, size_t nbytes, upc_flag_t sync_mode)
{
#ifndef PULL
#ifndef PUSH
#define PULL TRUE
#endif
#endif
int i;
if (!upc_coll_init_flag)
upc_coll_init ();
#ifdef _UPC_COLL_CHECK_ARGS
upc_coll_err (dst, src, NULL, nbytes, sync_mode, 0, 0, 0, UPC_EXCH);
#endif
// Synchronize using barriers in the cases of MYSYNC and ALLSYNC.
if (UPC_IN_MYSYNC & sync_mode || !(UPC_IN_NOSYNC & sync_mode))
upc_barrier;
#ifdef PULL
// Thread MYTHREAD copies the MYTHREADth block of thread i to
// its own ith block.
for (i = 0; i < THREADS; i++)
{
upc_memcpy ((shared char *) dst + i * nbytes * THREADS + MYTHREAD,
(shared char *) src + MYTHREAD * nbytes * THREADS + i,
nbytes);
}
#endif
#ifdef PUSH
// Thread MYTHREAD copies its ith block to the MYTHREADth block
// of thread i
for (i = 0; i < THREADS; i++)
{
upc_memcpy ((shared char *) dst + MYTHREAD * nbytes * THREADS + i,
(shared char *) src + i * nbytes * THREADS + MYTHREAD,
nbytes);
}
#endif
// Synchronize using barriers in the cases of MYSYNC and ALLSYNC.
if (UPC_OUT_MYSYNC & sync_mode || !(UPC_OUT_NOSYNC & sync_mode))
upc_barrier;
}
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