1*404b540aSrobert // Low-level functions for atomic operations: CRIS version -*- C++ -*-
2*404b540aSrobert
3*404b540aSrobert // Copyright (C) 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
4*404b540aSrobert //
5*404b540aSrobert // This file is part of the GNU ISO C++ Library. This library is free
6*404b540aSrobert // software; you can redistribute it and/or modify it under the
7*404b540aSrobert // terms of the GNU General Public License as published by the
8*404b540aSrobert // Free Software Foundation; either version 2, or (at your option)
9*404b540aSrobert // any later version.
10*404b540aSrobert
11*404b540aSrobert // This library is distributed in the hope that it will be useful,
12*404b540aSrobert // but WITHOUT ANY WARRANTY; without even the implied warranty of
13*404b540aSrobert // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14*404b540aSrobert // GNU General Public License for more details.
15*404b540aSrobert
16*404b540aSrobert // You should have received a copy of the GNU General Public License along
17*404b540aSrobert // with this library; see the file COPYING. If not, write to the Free
18*404b540aSrobert // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19*404b540aSrobert // USA.
20*404b540aSrobert
21*404b540aSrobert // As a special exception, you may use this file as part of a free software
22*404b540aSrobert // library without restriction. Specifically, if other files instantiate
23*404b540aSrobert // templates or use macros or inline functions from this file, or you compile
24*404b540aSrobert // this file and link it with other files to produce an executable, this
25*404b540aSrobert // file does not by itself cause the resulting executable to be covered by
26*404b540aSrobert // the GNU General Public License. This exception does not however
27*404b540aSrobert // invalidate any other reasons why the executable file might be covered by
28*404b540aSrobert // the GNU General Public License.
29*404b540aSrobert
30*404b540aSrobert #include <ext/atomicity.h>
31*404b540aSrobert
_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)32*404b540aSrobert _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
33*404b540aSrobert
34*404b540aSrobert _Atomic_word
35*404b540aSrobert __exchange_and_add(volatile _Atomic_word* __mem, int __val)
36*404b540aSrobert {
37*404b540aSrobert int __tmp;
38*404b540aSrobert _Atomic_word __result;
39*404b540aSrobert
40*404b540aSrobert #if (__CRIS_arch_version >= 10)
41*404b540aSrobert __asm__ __volatile__ (" clearf \n"
42*404b540aSrobert "0: \n"
43*404b540aSrobert " move.d %4,%2 \n"
44*404b540aSrobert " move.d [%3],%0 \n"
45*404b540aSrobert " add.d %0,%2 \n"
46*404b540aSrobert " ax \n"
47*404b540aSrobert " move.d %2,[%3] \n"
48*404b540aSrobert " bwf 0b \n"
49*404b540aSrobert " clearf \n"
50*404b540aSrobert : "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
51*404b540aSrobert : "r" (__mem), "g" (__val), "Q" (*__mem)
52*404b540aSrobert /* The memory clobber must stay, regardless of
53*404b540aSrobert current uses of this function. */
54*404b540aSrobert : "memory");
55*404b540aSrobert #else
56*404b540aSrobert __asm__ __volatile__ (" move $ccr,$r9 \n"
57*404b540aSrobert " di \n"
58*404b540aSrobert " move.d %4,%2 \n"
59*404b540aSrobert " move.d [%3],%0 \n"
60*404b540aSrobert " add.d %0,%2 \n"
61*404b540aSrobert " move.d %2,[%3] \n"
62*404b540aSrobert " move $r9,$ccr \n"
63*404b540aSrobert : "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
64*404b540aSrobert : "r" (__mem), "g" (__val), "Q" (*__mem)
65*404b540aSrobert : "r9",
66*404b540aSrobert /* The memory clobber must stay, regardless of
67*404b540aSrobert current uses of this function. */
68*404b540aSrobert "memory");
69*404b540aSrobert #endif
70*404b540aSrobert
71*404b540aSrobert return __result;
72*404b540aSrobert }
73*404b540aSrobert
74*404b540aSrobert void
__atomic_add(volatile _Atomic_word * __mem,int __val)75*404b540aSrobert __atomic_add(volatile _Atomic_word* __mem, int __val)
76*404b540aSrobert { __exchange_and_add(__mem, __val); }
77*404b540aSrobert
78*404b540aSrobert _GLIBCXX_END_NAMESPACE
79