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/* Machine-dependent pthreads configuration and inline functions.
am33 version.
Copyright (C) 1996-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Alexandre Oliva <aoliva@redhat.com>
Based on ../i386/pt-machine.h.
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. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef _PT_MACHINE_H
#define _PT_MACHINE_H 1
#ifndef __ASSEMBLER__
#ifndef PT_EI
# define PT_EI extern inline
#endif
/* Get some notion of the current stack. Need not be exactly the top
of the stack, just something somewhere in the current frame. */
#define CURRENT_STACK_FRAME __builtin_frame_address (0)
/* Spinlock implementation; required. */
PT_EI long int
testandset (int *spinlock)
{
long int ret = 1;
/* This won't test&set the entire int, only the least significant
byte. I hope this doesn't matter, since we can't do better. */
__asm__ __volatile__ ("bset %0, %1; bne 1f; clr %0; 1:" :
"+d" (ret), "+m" (*(volatile int *)spinlock));
return ret;
}
PT_EI int
get_eflags (void)
{
int res;
__asm__ __volatile__ ("mov psw,%0" : "=d" (res));
return res;
}
PT_EI void
set_eflags (int newflags)
{
__asm__ __volatile__ ("mov %0,psw" : : "d" (newflags) : "cc");
}
#endif /* __ASSEMBLER__ */
#endif /* pt-machine.h */
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