mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-27 03:49:03 +08:00
744ee8b72b
2001-10-05 Phil Edwards <pme@gcc.gnu.org> * config/cpu/alpha/bits/atomicity.h (__compare_and_swap): Remove unused function. * config/cpu/arm/bits/atomicity.h: Likewise. * config/cpu/generic/bits/atomicity.h: Likewise. * config/cpu/i486/bits/atomicity.h: Likewise. * config/cpu/ia64/bits/atomicity.h: Likewise. * config/cpu/mips/bits/atomicity.h: Likewise. * config/cpu/powerpc/bits/atomicity.h: Likewise. * config/cpu/sparc/sparc32/bits/atomicity.h: Likewise. * config/cpu/sparc/sparc64/bits/atomicity.h: Likewise. From-SVN: r46038
113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
// Low-level functions for atomic operations: PowerPC version -*- C++ -*-
|
|
|
|
// Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library 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 2, or (at your option)
|
|
// any later version.
|
|
|
|
// This 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 General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License along
|
|
// with this library; see the file COPYING. If not, write to the Free
|
|
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
|
|
// USA.
|
|
|
|
// As a special exception, you may use this file as part of a free software
|
|
// library without restriction. Specifically, if other files instantiate
|
|
// templates or use macros or inline functions from this file, or you compile
|
|
// this file and link it with other files to produce an executable, this
|
|
// file does not by itself cause the resulting executable to be covered by
|
|
// the GNU General Public License. This exception does not however
|
|
// invalidate any other reasons why the executable file might be covered by
|
|
// the GNU General Public License.
|
|
|
|
#ifndef _BITS_ATOMICITY_H
|
|
#define _BITS_ATOMICITY_H 1
|
|
|
|
typedef int _Atomic_word;
|
|
|
|
static inline _Atomic_word
|
|
__attribute__ ((__unused__))
|
|
__exchange_and_add (volatile _Atomic_word* __mem, int __val)
|
|
{
|
|
_Atomic_word __tmp, __res;
|
|
__asm__ __volatile__ (
|
|
"/* Inline exchange & add */\n"
|
|
"0:\t"
|
|
"lwarx %0,0,%2 \n\t"
|
|
"add%I3 %1,%0,%3 \n\t"
|
|
"stwcx. %1,0,%2 \n\t"
|
|
"bne- 0b \n\t"
|
|
"/* End exchange & add */"
|
|
: "=&b"(__res), "=&r"(__tmp)
|
|
: "r" (__mem), "Ir"(__val)
|
|
: "cr0", "memory");
|
|
return __res;
|
|
}
|
|
|
|
static inline void
|
|
__attribute__ ((__unused__))
|
|
__atomic_add (volatile _Atomic_word *__mem, int __val)
|
|
{
|
|
_Atomic_word __tmp;
|
|
__asm__ __volatile__ (
|
|
"/* Inline atomic add */\n"
|
|
"0:\t"
|
|
"lwarx %0,0,%1 \n\t"
|
|
"add%I2 %0,%0,%2 \n\t"
|
|
"stwcx. %0,0,%1 \n\t"
|
|
"bne- 0b \n\t"
|
|
"/* End atomic add */"
|
|
: "=&b"(__tmp)
|
|
: "r" (__mem), "Ir"(__val)
|
|
: "cr0", "memory");
|
|
}
|
|
|
|
static inline long
|
|
__attribute__ ((__unused__))
|
|
__always_swap (volatile long *__p, long int __newval)
|
|
{
|
|
long __res;
|
|
__asm__ __volatile__ (
|
|
"/* Inline always swap */\n"
|
|
"0:\t"
|
|
"lwarx %0,0,%1 \n\t"
|
|
"stwcx. %2,0,%1 \n\t"
|
|
"bne- 0b \n\t"
|
|
"/* End always swap */"
|
|
: "=&r"(__res)
|
|
: "r"(__p), "r"(__newval)
|
|
: "cr0", "memory");
|
|
return __res;
|
|
}
|
|
|
|
static inline int
|
|
__attribute__ ((__unused__))
|
|
__test_and_set (volatile long *__p, long int __newval)
|
|
{
|
|
int __res;
|
|
__asm__ __volatile__ (
|
|
"/* Inline test & set */\n"
|
|
"0:\t"
|
|
"lwarx %0,0,%1 \n\t"
|
|
"cmpwi %0,0 \n\t"
|
|
"bne- 1f \n\t"
|
|
"stwcx. %2,0,%1 \n\t"
|
|
"bne- 0b \n"
|
|
"1:\n\t"
|
|
"/* End test & set */"
|
|
: "=&r"(__res)
|
|
: "r"(__p), "r"(__newval)
|
|
: "cr0", "memory");
|
|
return __res;
|
|
}
|
|
|
|
#endif /* atomicity.h */
|
|
|