1// Low-level functions for atomic operations: CRIS version  -*- C++ -*-
2
3// Copyright (C) 2001, 2003, 2004, 2005, 2009 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23// <http://www.gnu.org/licenses/>.
24
25#include <ext/atomicity.h>
26
27_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
28
29  _Atomic_word
30  __exchange_and_add(volatile _Atomic_word* __mem, int __val) throw ()
31  {
32    int __tmp;
33    _Atomic_word __result;
34
35#if (__CRIS_arch_version >= 32)
36  __asm__ __volatile__ (" clearf p	       \n"
37		       "0:		       \n"
38		       " move.d %4,%2	       \n"
39		       " move.d [%3],%0	       \n"
40		       " add.d %0,%2	       \n"
41		       " ax		       \n"
42		       " move.d %2,[%3]	       \n"
43		       " bcs 0b		       \n"
44		       " clearf p	       \n"
45		       :  "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
46		       : "r" (__mem), "g" (__val), "Q" (*__mem)
47		       : "memory");
48#elif (__CRIS_arch_version >= 10)
49    __asm__ __volatile__ (" clearf		\n"
50			"0:			\n"
51			" move.d %4,%2		\n"
52			" move.d [%3],%0	\n"
53			" add.d %0,%2		\n"
54			" ax			\n"
55			" move.d %2,[%3]	\n"
56			" bwf 0b		\n"
57			" clearf		\n"
58			:  "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
59			: "r" (__mem), "g" (__val), "Q" (*__mem)
60			/* The memory clobber must stay, regardless of
61			   current uses of this function.  */
62			: "memory");
63#else
64    __asm__ __volatile__ (" move $ccr,$r9	\n"
65			" di			\n"
66			" move.d %4,%2		\n"
67			" move.d [%3],%0	\n"
68			" add.d %0,%2		\n"
69			" move.d %2,[%3]	\n"
70			" move $r9,$ccr		\n"
71			:  "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
72			: "r" (__mem), "g" (__val), "Q" (*__mem)
73			: "r9",
74			  /* The memory clobber must stay, regardless of
75			     current uses of this function.  */
76			  "memory");
77#endif
78
79    return __result;
80  }
81
82  void
83  __atomic_add(volatile _Atomic_word* __mem, int __val) throw ()
84  { __exchange_and_add(__mem, __val); }
85
86_GLIBCXX_END_NAMESPACE
87