1 files changed, 79 insertions, 0 deletions
diff --git a/libstdc++-v3/config/cpu/cris/atomicity.h b/libstdc++-v3/config/cpu/cris/atomicity.h
new file mode 100644
index 00000000000..55c374f3ed7
--- /dev/null
+++ b/libstdc++-v3/config/cpu/cris/atomicity.h
@@ -0,0 +1,79 @@
+// Low-level functions for atomic operations: CRIS version  -*- C++ -*-
+
+// Copyright (C) 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
+
+// This entity must not cross a page boundary.
+typedef int _Atomic_word __attribute__ ((__aligned__ (4)));
+
+static inline _Atomic_word
+__attribute__ ((__unused__))
+__exchange_and_add (_Atomic_word* __mem, int __val)
+{
+  int __tmp;
+  _Atomic_word __result;
+
+#if (__CRIS_arch_version >= 10)
+  __asm__ __volatile__ (" clearf		\n"
+			"0:			\n"
+			" move.d %4,%2		\n"
+			" move.d [%3],%0	\n"
+			" add.d %0,%2		\n"
+			" ax			\n"
+			" move.d %2,[%3]	\n"
+			" bwf 0b		\n"
+			" clearf		\n"
+			:  "=&r" (__result), "=m" (*__mem), "=&r" (__tmp)
+			: "r" (__mem), "g" (__val), "m" (*__mem)
+			: "memory");
+#else
+  __asm__ __volatile__ (" move $ccr,$r9		\n"
+			" di			\n"
+			" move.d %4,%2		\n"
+			" move.d [%3],%0	\n"
+			" add.d %0,%2		\n"
+			" move.d %2,[%3]	\n"
+			" move $r9,$ccr		\n"
+			:  "=&r" (__result), "=m" (*__mem), "=&r" (__tmp)
+			: "r" (__mem), "g" (__val), "m" (*__mem)
+			: "memory", "r9");
+#endif
+
+  return __result;
+}
+
+static inline void
+__attribute__ ((__unused__))
+__atomic_add (_Atomic_word* __mem, int __val)
+{
+  __exchange_and_add (__mem, __val);
+}
+
+#endif /* atomicity.h */