* configure.target (cpu_include_dir): Set to `config/cpu/m68k' for

	m68k and m680[246]0.
	* config/cpu/m68k/bits/atomicity.h: New file.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@44925 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 61 insertions, 0 deletions

diff --git a/libstdc++-v3/config/cpu/m68k/bits/atomicity.h b/libstdc++-v3/config/cpu/m68k/bits/atomicity.h
new file mode 100644
index 00000000000..1377ee157c9
--- /dev/null
+++ b/libstdc++-v3/config/cpu/m68k/bits/atomicity.h
@@ -0,0 +1,61 @@
+// Low-level functions for atomic operations: m680x0, x >= 2 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
+
+typedef int _Atomic_word;
+
+static inline _Atomic_word 
+__attribute__ ((__unused__))
+__exchange_and_add (volatile _Atomic_word *__mem, int __val)
+{
+  register _Atomic_word __result = *__mem;
+  register _Atomic_word __temp;
+  __asm__ __volatile__ ("1: move%.l %0,%1;"
+			"   add%.l %2,%1;"
+			"   cas%.l %0,%1,%3;"
+			"   jbne 1b"
+			: "=d" (__result), "=&d" (__temp)
+			: "d" (__val), "m" (*__mem), "0" (__result)
+			: "memory");
+  return __result;
+}
+
+static inline void
+__attribute__ ((__unused__))
+__atomic_add (volatile _Atomic_word* __mem, int __val)
+{
+  __asm__ __volatile__ ("add%.l %0,%1"
+			: : "id" (__val), "m" (*__mem) : "memory");
+}
+
+#endif /* atomicity.h */
+
+