7e0ec38b14
2000-08-22 Richard B. Kreckel <Richard.Kreckel@Uni-Mainz.DE> * config/cpu/alpha/bits/atomicity.h: Change __attribute__ ((unused)) to __attribute__ ((__unused__)). * config/cpu/arm/bits/atomicity.h: Same. * config/cpu/generic/bits/atomicity.h: Same. * config/cpu/i386/bits/atomicity.h: Same. * config/cpu/i486/bits/atomicity.h: Same. * config/cpu/powerpc/bits/atomicity.h: Same. * config/cpu/sparc/sparc32/bits/atomicity.h: Same. * config/cpu/sparc/sparc64/bits/atomicity.h: Same. From-SVN: r35882
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/* Low-level functions for atomic operations. Sparc64 version.
|
|
Copyright (C) 1999 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
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. */
|
|
|
|
#ifndef _BITS_ATOMICITY_H
|
|
#define _BITS_ATOMICITY_H 1
|
|
|
|
typedef long _Atomic_word;
|
|
|
|
static inline _Atomic_word
|
|
__attribute__ ((__unused__))
|
|
__exchange_and_add (volatile _Atomic_word *__mem, int __val)
|
|
{
|
|
_Atomic_word __tmp1, __tmp2;
|
|
|
|
__asm__ __volatile__("1: ldx [%2], %0\n\t"
|
|
" add %0, %3, %1\n\t"
|
|
" casx [%2], %0, %1\n\t"
|
|
" sub %0, %1, %0\n\t"
|
|
" brnz,pn %0, 1b\n\t"
|
|
" nop"
|
|
: "=&r" (__tmp1), "=&r" (__tmp2)
|
|
: "r" (__mem), "r" (__val)
|
|
: "memory");
|
|
return __tmp2;
|
|
}
|
|
|
|
static inline void
|
|
__attribute__ ((__unused__))
|
|
__atomic_add (volatile _Atomic_word* __mem, int __val)
|
|
{
|
|
_Atomic_word __tmp1, __tmp2;
|
|
|
|
__asm__ __volatile__("1: ldx [%2], %0\n\t"
|
|
" add %0, %3, %1\n\t"
|
|
" casx [%2], %0, %1\n\t"
|
|
" sub %0, %1, %0\n\t"
|
|
" brnz,pn %0, 1b\n\t"
|
|
" nop"
|
|
: "=&r" (__tmp1), "=&r" (__tmp2)
|
|
: "r" (__mem), "r" (__val)
|
|
: "memory");
|
|
}
|
|
|
|
static inline int
|
|
__attribute__ ((__unused__))
|
|
__compare_and_swap (volatile long *__p, long __oldval, long __newval)
|
|
{
|
|
register int __tmp,
|
|
register long __tmp2;
|
|
|
|
__asm__ __volatile__("1: ldx [%4], %0\n\t"
|
|
" mov %2, %1\n\t"
|
|
" cmp %0, %3\n\t"
|
|
" bne,a,pn %%xcc, 2f\n\t"
|
|
" mov 0, %0\n\t"
|
|
" casx [%4], %0, %1\n\t"
|
|
" sub %0, %1, %0\n\t"
|
|
" brnz,pn %0, 1b\n\t"
|
|
" mov 1, %0\n\t"
|
|
"2:"
|
|
: "=&r" (__tmp), "=&r" (__tmp2)
|
|
: "r" (__newval), "r" (__oldval), "r" (__p)
|
|
: "memory");
|
|
return __tmp;
|
|
}
|
|
|
|
#endif /* atomicity.h */
|