1 files changed, 123 insertions, 0 deletions
diff --git a/libstdc++-v3/config/cpu/sh/atomicity.h b/libstdc++-v3/config/cpu/sh/atomicity.h
new file mode 100644
index 00000000000..b7d6c605d72
--- /dev/null
+++ b/libstdc++-v3/config/cpu/sh/atomicity.h
@@ -0,0 +1,123 @@
+// Low-level functions for atomic operations: Generic version  -*- C++ -*-
+
+// Copyright (C) 1999, 2001, 2002, 2003 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
+
+#ifdef __SH4A__
+
+typedef int _Atomic_word;
+
+static inline _Atomic_word
+__attribute__ ((__unused__))
+__exchange_and_add (volatile _Atomic_word* __mem, int __val)
+{
+  _Atomic_word __result;
+
+  __asm__ __volatile__
+    ("0:\n"
+     "\tmovli.l\t@%2,r0\n"
+     "\tmov\tr0,%1\n"
+     "\tadd\t%3,r0\n"
+     "\tmovco.l\tr0,@%2\n"
+     "\tbf\t0b"
+     : "+m" (*__mem), "=r" (__result)
+     : "r" (__mem), "rI08" (__val)
+     : "r0");
+
+  return __result;
+}
+
+
+static inline void
+__attribute__ ((__unused__))
+__atomic_add (volatile _Atomic_word* __mem, int __val)
+{
+  asm("0:\n"
+      "\tmovli.l\t@%1,r0\n"
+      "\tadd\t%2,r0\n"
+      "\tmovco.l\tr0,@%1\n"
+      "\tbf\t0b"
+      : "+m" (*__mem)
+      : "r" (__mem), "rI08" (__val)
+      : "r0");
+}
+
+#else
+
+/* This is generic/atomicity.h */
+
+#include <bits/gthr.h>
+
+#define _GLIBCPP_NEED_GENERIC_MUTEX
+
+typedef int _Atomic_word;
+
+namespace __gnu_cxx
+{
+  extern __gthread_mutex_t _Atomic_add_mutex;
+
+#ifndef __GTHREAD_MUTEX_INIT
+  extern __gthread_once_t _Atomic_add_mutex_once;
+  extern void __gthread_atomic_add_mutex_once();
+#endif
+}
+
+static inline _Atomic_word
+__attribute__ ((__unused__))
+__exchange_and_add (volatile _Atomic_word* __mem, int __val)
+{
+#ifndef __GTHREAD_MUTEX_INIT
+  __gthread_once (&__gnu_cxx::_Atomic_add_mutex_once,
+                  __gnu_cxx::__gthread_atomic_add_mutex_once);
+#endif
+
+  _Atomic_word __result;
+
+  __gthread_mutex_lock (&__gnu_cxx::_Atomic_add_mutex);
+
+  __result = *__mem;
+  *__mem += __val;
+
+  __gthread_mutex_unlock (&__gnu_cxx::_Atomic_add_mutex);
+  return __result;
+}
+
+
+static inline void
+__attribute__ ((__unused__))
+__atomic_add (volatile _Atomic_word* __mem, int __val)
+{
+  (void) __exchange_and_add (__mem, __val);
+}
+
+
+#endif
+
+#endif /* atomicity.h */