09f2a1e440
(__exchange_and_add, __atomic_add): Mark throw (). * config/os/aix/atomicity.h * config/os/aix/atomicity.h * config/os/irix/atomicity.h * config/cpu/cris/atomicity.h * config/cpu/m68k/atomicity.h * config/cpu/hppa/atomicity.h * config/cpu/sparc/atomicity.h * config/cpu/i386/atomicity.h * config/cpu/i486/atomicity.h * config/cpu/sh/atomicity.h * config/cpu/generic/atomicity_mutex/atomicity.h * config/cpu/generic/atomicity_builtins/atomicity.h (__exchange_and_add, __atomic_add): Mark throw (). From-SVN: r146576
123 lines
3.5 KiB
C++
123 lines
3.5 KiB
C++
// Low-level functions for atomic operations: Sparc version -*- C++ -*-
|
|
|
|
// Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2009
|
|
// 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 3, 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.
|
|
|
|
// Under Section 7 of GPL version 3, you are granted additional
|
|
// permissions described in the GCC Runtime Library Exception, version
|
|
// 3.1, as published by the Free Software Foundation.
|
|
|
|
// You should have received a copy of the GNU General Public License and
|
|
// a copy of the GCC Runtime Library Exception along with this program;
|
|
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
#include <ext/atomicity.h>
|
|
|
|
_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
|
|
|
|
#ifdef __arch64__
|
|
_Atomic_word
|
|
__attribute__ ((__unused__))
|
|
__exchange_and_add(volatile _Atomic_word* __mem, int __val) throw ()
|
|
{
|
|
_Atomic_word __tmp1, __tmp2;
|
|
_Atomic_word __val_extended = __val;
|
|
|
|
__asm__ __volatile__("1: ldx [%3], %0\n\t"
|
|
" add %0, %4, %1\n\t"
|
|
" casx [%3], %0, %1\n\t"
|
|
" sub %0, %1, %0\n\t"
|
|
" brnz,pn %0, 1b\n\t"
|
|
" nop"
|
|
: "=&r" (__tmp1), "=&r" (__tmp2), "=m" (*__mem)
|
|
: "r" (__mem), "r" (__val_extended), "m" (*__mem));
|
|
return __tmp2;
|
|
}
|
|
|
|
void
|
|
__attribute__ ((__unused__))
|
|
__atomic_add(volatile _Atomic_word* __mem, int __val) throw ()
|
|
{
|
|
_Atomic_word __tmp1, __tmp2;
|
|
_Atomic_word __val_extended = __val;
|
|
|
|
__asm__ __volatile__("1: ldx [%3], %0\n\t"
|
|
" add %0, %4, %1\n\t"
|
|
" casx [%3], %0, %1\n\t"
|
|
" sub %0, %1, %0\n\t"
|
|
" brnz,pn %0, 1b\n\t"
|
|
" nop"
|
|
: "=&r" (__tmp1), "=&r" (__tmp2), "=m" (*__mem)
|
|
: "r" (__mem), "r" (__val_extended), "m" (*__mem));
|
|
}
|
|
|
|
#else /* __arch32__ */
|
|
|
|
template<int __inst>
|
|
struct _Atomicity_lock
|
|
{
|
|
static unsigned char _S_atomicity_lock;
|
|
};
|
|
|
|
template<int __inst>
|
|
unsigned char _Atomicity_lock<__inst>::_S_atomicity_lock = 0;
|
|
|
|
template unsigned char _Atomicity_lock<0>::_S_atomicity_lock;
|
|
|
|
_Atomic_word
|
|
__attribute__ ((__unused__))
|
|
__exchange_and_add(volatile _Atomic_word* __mem, int __val) throw ()
|
|
{
|
|
_Atomic_word __result, __tmp;
|
|
|
|
__asm__ __volatile__("1: ldstub [%1], %0\n\t"
|
|
" cmp %0, 0\n\t"
|
|
" bne 1b\n\t"
|
|
" nop"
|
|
: "=&r" (__tmp)
|
|
: "r" (&_Atomicity_lock<0>::_S_atomicity_lock)
|
|
: "memory");
|
|
__result = *__mem;
|
|
*__mem += __val;
|
|
__asm__ __volatile__("stb %%g0, [%0]"
|
|
: /* no outputs */
|
|
: "r" (&_Atomicity_lock<0>::_S_atomicity_lock)
|
|
: "memory");
|
|
return __result;
|
|
}
|
|
|
|
void
|
|
__attribute__ ((__unused__))
|
|
__atomic_add(volatile _Atomic_word* __mem, int __val) throw ()
|
|
{
|
|
_Atomic_word __tmp;
|
|
|
|
__asm__ __volatile__("1: ldstub [%1], %0\n\t"
|
|
" cmp %0, 0\n\t"
|
|
" bne 1b\n\t"
|
|
" nop"
|
|
: "=&r" (__tmp)
|
|
: "r" (&_Atomicity_lock<0>::_S_atomicity_lock)
|
|
: "memory");
|
|
*__mem += __val;
|
|
__asm__ __volatile__("stb %%g0, [%0]"
|
|
: /* no outputs */
|
|
: "r" (&_Atomicity_lock<0>::_S_atomicity_lock)
|
|
: "memory");
|
|
}
|
|
#endif /* __arch32__ */
|
|
|
|
_GLIBCXX_END_NAMESPACE
|