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/* Copyright (C) 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include "pthreadP.h"
int
pthread_spin_lock (pthread_spinlock_t *lock)
{
__asm __volatile
("1: ldstub [%0], %%g5\n"
" brnz,pn %%g5, 2f\n"
" membar #StoreLoad | #StoreStore\n"
".subsection 2\n"
"2: ldub [%0], %%g5\n"
" brnz,pt %%g5, 2b\n"
" membar #LoadLoad\n"
" b,a,pt %%xcc, 1b\n"
".previous"
: /* no outputs */
: "r" (lock)
: "g5", "memory");
return 0;
}
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