1 files changed, 90 insertions, 0 deletions
diff --git a/contrib/libstdc++/config/cpu/hppa/atomicity.h b/contrib/libstdc++/config/cpu/hppa/atomicity.h
new file mode 100644
index 0000000..d99ac34
--- /dev/null
+++ b/contrib/libstdc++/config/cpu/hppa/atomicity.h
@@ -0,0 +1,90 @@
+/* Low-level functions for atomic operations.  PA-RISC version. -*- C++ -*-
+   Copyright 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _BITS_ATOMICITY_H
+#define _BITS_ATOMICITY_H	1
+
+typedef int _Atomic_word;
+
+template <int __inst>
+struct __Atomicity_lock
+{
+  static volatile int _S_atomicity_lock;
+};
+
+template <int __inst>
+volatile int
+__Atomicity_lock<__inst>::_S_atomicity_lock __attribute__ ((aligned (16))) = 1;
+
+/* Because of the lack of weak support when using the hpux
+   som linker, we explicitly instantiate the atomicity lock
+   in src/misc-inst.cc when _GLIBCPP_INST_ATOMICITY_LOCK
+   is defined.  */
+#ifndef _GLIBCPP_INST_ATOMICITY_LOCK
+template volatile int __Atomicity_lock<0>::_S_atomicity_lock;
+#endif
+
+static inline int
+__attribute__ ((__unused__))
+__exchange_and_add (volatile _Atomic_word* __mem, int __val)
+{
+  _Atomic_word result;
+  int tmp;
+  volatile int& lock = __Atomicity_lock<0>::_S_atomicity_lock;
+
+  __asm__ __volatile__ ("ldcw 0(%1),%0\n\t"
+			"cmpib,<>,n 0,%0,.+20\n\t"
+			"ldw 0(%1),%0\n\t"
+			"cmpib,= 0,%0,.-4\n\t"
+			"nop\n\t"
+			"b,n .-20"
+			: "=&r" (tmp)
+			: "r" (&lock));
+
+  result = *__mem;
+  *__mem = result + __val;
+  /* Reset lock with PA 2.0 "ordered" store.  */
+  __asm__ __volatile__ ("stw,ma %1,0(%0)"
+			: : "r" (&lock), "r" (tmp) : "memory");
+  return result;
+}
+
+static inline void
+__attribute__ ((__unused__))
+__atomic_add (_Atomic_word* __mem, int __val)
+{
+  int tmp;
+  volatile int& lock = __Atomicity_lock<0>::_S_atomicity_lock;
+
+  __asm__ __volatile__ ("ldcw 0(%1),%0\n\t"
+			"cmpib,<>,n 0,%0,.+20\n\t"
+			"ldw 0(%1),%0\n\t"
+			"cmpib,= 0,%0,.-4\n\t"
+			"nop\n\t"
+			"b,n .-20"
+			: "=&r" (tmp)
+			: "r" (&lock));
+
+  *__mem += __val;
+  /* Reset lock with PA 2.0 "ordered" store.  */
+  __asm__ __volatile__ ("stw,ma %1,0(%0)"
+			: : "r" (&lock), "r" (tmp) : "memory");
+}
+
+#endif