atomicity.h: Use the builtins for atomic memory operations.

2005-05-25  Paolo Carlini  <pcarlini@suse.de>

	* config/cpu/alpha/atomicity.h: Use the builtins for
	atomic memory operations.
	* config/cpu/powerpc/atomicity.h: Likewise.
	* config/cpu/ia64/atomicity.h: Do not include ia64intrin.h.

From-SVN: r100139

libstdc++-v3/ChangeLog

+2005-05-25  Paolo Carlini  <pcarlini@suse.de>
+
+	* config/cpu/alpha/atomicity.h: Use the builtins for
+	atomic memory operations.
+	* config/cpu/powerpc/atomicity.h: Likewise.
+	* config/cpu/ia64/atomicity.h: Do not include ia64intrin.h.
+
 2005-05-24  Paolo Carlini  <pcarlini@suse.de>
 
 	* testsuite/25_algorithms/equal.cc: Move to...

libstdc++-v3/config/cpu/alpha/atomicity.h

 // Low-level functions for atomic operations: Alpha version  -*- C++ -*-
 
-// Copyright (C) 1999, 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
+// Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005
+// 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
@@ -29,47 +30,16 @@
 
 #include <bits/atomicity.h>
 
-/* @@@ With gas we can play nice .subsection games to get the
-   non-predicted branch pointing forward.  But Digital assemblers
-   don't understand those directives.  This isn't a terribly
-   important issue, so just ignore it.  */
-
 namespace __gnu_cxx
 {
   _Atomic_word
   __attribute__ ((__unused__))
   __exchange_and_add(volatile _Atomic_word* __mem, int __val)
-  {
-    register int __result, __tmp;
-    
-    __asm__ __volatile__ (
-      "\n$Lxadd_%=:\n\t"
-      "ldl_l  %0,%3\n\t"
-      "addl   %0,%4,%1\n\t"
-      "stl_c  %1,%2\n\t"
-      "beq    %1,$Lxadd_%=\n\t"
-      "mb"
-      : "=&r"(__result), "=&r"(__tmp), "=m"(*__mem)
-      : "m" (*__mem), "r"(__val));
-
-    return __result;
-  }
+  { return __sync_fetch_and_add(__mem, __val); }
 
   void
   __attribute__ ((__unused__))
   __atomic_add(volatile _Atomic_word* __mem, int __val)
-  {
-    register _Atomic_word __result;
-
-    __asm__ __volatile__ (
-      "\n$Ladd_%=:\n\t"
-      "ldl_l  %0,%2\n\t"
-      "addl   %0,%3,%0\n\t"
-      "stl_c  %0,%1\n\t"
-      "beq    %0,$Ladd_%=\n\t"
-      "mb"
-      : "=&r"(__result), "=m"(*__mem)
-      : "m" (*__mem), "r"(__val));
-  }
+  { __sync_fetch_and_add(__mem, __val); }
 } // namespace __gnu_cxx
 

libstdc++-v3/config/cpu/ia64/atomicity.h

 // Low-level functions for atomic operations: IA64 version  -*- C++ -*-
 
-// Copyright (C) 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
+// Copyright (C) 2000, 2001, 2003, 2004, 2005
+// 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
@@ -28,7 +29,6 @@
 // the GNU General Public License.
 
 #include <bits/atomicity.h>
-#include <ia64intrin.h>
 
 namespace __gnu_cxx
 {

libstdc++-v3/config/cpu/powerpc/atomicity.h

 // Low-level functions for atomic operations: PowerPC version  -*- C++ -*-
 
-// Copyright (C) 1999, 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
+// Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005
+// 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
@@ -29,48 +30,15 @@
 
 #include <bits/atomicity.h>
 
-#ifdef __PPC405__
-#define _STWCX "sync \n\tstwcx. "
-#else
-#define _STWCX "stwcx. "
-#endif
-
 namespace __gnu_cxx
 {
   _Atomic_word
   __attribute__ ((__unused__))
   __exchange_and_add(volatile _Atomic_word* __mem, int __val)
-  {
-    _Atomic_word __tmp, __res;
-    __asm__ __volatile__ (
-			  "/* Inline exchange & add */\n"
-			  "0:\t"
-			  "lwarx    %0,0,%3 \n\t"
-			  "add%I4   %1,%0,%4 \n\t"
-			  _STWCX "  %1,0,%3 \n\t"
-			  "bne-     0b \n\t"
-			  "/* End exchange & add */"
-			  : "=&b"(__res), "=&r"(__tmp), "=m" (*__mem)
-			  : "r" (__mem), "Ir"(__val), "m" (*__mem)
-			  : "cr0");
-    return __res;
-  }
+  { return __sync_fetch_and_add(__mem, __val); }
   
   void
   __attribute__ ((__unused__))
   __atomic_add(volatile _Atomic_word* __mem, int __val)
-  {
-    _Atomic_word __tmp;
-    __asm__ __volatile__ (
-			  "/* Inline atomic add */\n"
-			  "0:\t"
-			  "lwarx    %0,0,%2 \n\t"
-			  "add%I3   %0,%0,%3 \n\t"
-			  _STWCX "  %0,0,%2 \n\t"
-			  "bne-     0b \n\t"
-			  "/* End atomic add */"
-			  : "=&b"(__tmp), "=m" (*__mem)
-			  : "r" (__mem), "Ir"(__val), "m" (*__mem)
-			  : "cr0");
-  }
+  { __sync_fetch_and_add(__mem, __val); }
 } // namespace __gnu_cxx