Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / config / cpu / cris / atomicity.h

diff --git a/libstdc++-v3/config/cpu/cris/atomicity.h b/libstdc++-v3/config/cpu/cris/atomicity.h
new file mode 100644 (file)
index 0000000..37be3a8
--- /dev/null
+++ b/libstdc++-v3/config/cpu/cris/atomicity.h
@@ -0,0 +1,86 @@
+// Low-level functions for atomic operations: CRIS version  -*- C++ -*-
+
+// Copyright (C) 2001, 2003, 2004, 2005, 2009 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 3, 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+#include <ext/atomicity.h>
+
+_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
+
+  _Atomic_word
+  __exchange_and_add(volatile _Atomic_word* __mem, int __val)
+  {
+    int __tmp;
+    _Atomic_word __result;
+
+#if (__CRIS_arch_version >= 32)
+  __asm__ __volatile__ (" clearf p            \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"
+                      " bcs 0b                \n"
+                      " clearf p              \n"
+                      :  "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
+                      : "r" (__mem), "g" (__val), "Q" (*__mem)
+                      : "memory");
+#elif (__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), "=Q" (*__mem), "=&r" (__tmp)
+                       : "r" (__mem), "g" (__val), "Q" (*__mem)
+                       /* The memory clobber must stay, regardless of
+                          current uses of this function.  */
+                       : "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), "=Q" (*__mem), "=&r" (__tmp)
+                       : "r" (__mem), "g" (__val), "Q" (*__mem)
+                       : "r9",
+                         /* The memory clobber must stay, regardless of
+                            current uses of this function.  */
+                         "memory");
+#endif
+
+    return __result;
+  }
+
+  void
+  __atomic_add(volatile _Atomic_word* __mem, int __val)
+  { __exchange_and_add(__mem, __val); }
+
+_GLIBCXX_END_NAMESPACE