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/* Cloned for uClibc by Paul Mundt, December 2003 */
/* Modified by SuperH, Inc. September 2003 */
/* Machine-dependent pthreads configuration and inline functions.
SH5 version.
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Niibe Yutaka <gniibe@m17n.org>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "pt-machine.h"
/* Spinlock implementation; required. */
/* The SH5 does not have a suitable test-and-set instruction (SWAP only
operates on an aligned quad word). So we use the SH4 version instead.
This must be seperately compiled in SHcompact mode, so it cannot be
inline. */
long int testandset (int *spinlock)
{
int ret;
__asm__ __volatile__(
"tas.b @%1\n\t"
"movt %0"
: "=r" (ret)
: "r" (spinlock)
: "memory", "cc");
return (ret == 0);
}
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