1209523Srpaulo// Low-level functions for atomic operations: CRIS version  -*- C++ -*-
2209523Srpaulo
3209523Srpaulo// Copyright (C) 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
4209523Srpaulo//
5209523Srpaulo// This file is part of the GNU ISO C++ Library.  This library is free
6209523Srpaulo// software; you can redistribute it and/or modify it under the
7209523Srpaulo// terms of the GNU General Public License as published by the
8209523Srpaulo// Free Software Foundation; either version 2, or (at your option)
9209523Srpaulo// any later version.
10209523Srpaulo
11209523Srpaulo// This library is distributed in the hope that it will be useful,
12209523Srpaulo// but WITHOUT ANY WARRANTY; without even the implied warranty of
13209523Srpaulo// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14209523Srpaulo// GNU General Public License for more details.
15209523Srpaulo
16209523Srpaulo// You should have received a copy of the GNU General Public License along
17209523Srpaulo// with this library; see the file COPYING.  If not, write to the Free
18209523Srpaulo// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19209523Srpaulo// USA.
20209523Srpaulo
21209523Srpaulo// As a special exception, you may use this file as part of a free software
22209523Srpaulo// library without restriction.  Specifically, if other files instantiate
23209523Srpaulo// templates or use macros or inline functions from this file, or you compile
24209523Srpaulo// this file and link it with other files to produce an executable, this
25209523Srpaulo// file does not by itself cause the resulting executable to be covered by
26209523Srpaulo// the GNU General Public License.  This exception does not however
27209523Srpaulo// invalidate any other reasons why the executable file might be covered by
28209523Srpaulo// the GNU General Public License.
29209523Srpaulo
30209523Srpaulo#include <ext/atomicity.h>
31209523Srpaulo
32209523Srpaulo_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
33209523Srpaulo
34209523Srpaulo  _Atomic_word
35209523Srpaulo  __exchange_and_add(volatile _Atomic_word* __mem, int __val)
36209523Srpaulo  {
37209523Srpaulo    int __tmp;
38209523Srpaulo    _Atomic_word __result;
39209523Srpaulo
40209523Srpaulo#if (__CRIS_arch_version >= 10)
41209523Srpaulo    __asm__ __volatile__ (" clearf		\n"
42209523Srpaulo			"0:			\n"
43209523Srpaulo			" move.d %4,%2		\n"
44209523Srpaulo			" move.d [%3],%0	\n"
45209523Srpaulo			" add.d %0,%2		\n"
46209523Srpaulo			" ax			\n"
47209523Srpaulo			" move.d %2,[%3]	\n"
48209523Srpaulo			" bwf 0b		\n"
49209523Srpaulo			" clearf		\n"
50209523Srpaulo			:  "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
51209523Srpaulo			: "r" (__mem), "g" (__val), "Q" (*__mem)
52209523Srpaulo			/* The memory clobber must stay, regardless of
53209523Srpaulo			   current uses of this function.  */
54209523Srpaulo			: "memory");
55209523Srpaulo#else
56209523Srpaulo    __asm__ __volatile__ (" move $ccr,$r9	\n"
57209523Srpaulo			" di			\n"
58209523Srpaulo			" move.d %4,%2		\n"
59209523Srpaulo			" move.d [%3],%0	\n"
60209523Srpaulo			" add.d %0,%2		\n"
61209523Srpaulo			" move.d %2,[%3]	\n"
62209523Srpaulo			" move $r9,$ccr		\n"
63209523Srpaulo			:  "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
64209523Srpaulo			: "r" (__mem), "g" (__val), "Q" (*__mem)
65209523Srpaulo			: "r9",
66209523Srpaulo			  /* The memory clobber must stay, regardless of
67209523Srpaulo			     current uses of this function.  */
68209523Srpaulo			  "memory");
69209523Srpaulo#endif
70209523Srpaulo
71209523Srpaulo    return __result;
72209523Srpaulo  }
73209523Srpaulo
74209523Srpaulo  void
75209523Srpaulo  __atomic_add(volatile _Atomic_word* __mem, int __val)
76209523Srpaulo  { __exchange_and_add(__mem, __val); }
77209523Srpaulo
78209523Srpaulo_GLIBCXX_END_NAMESPACE
79209523Srpaulo