atomicity.h (__exchange_and_add): Fix output constraint.

        * config/cpu/i386/atomicity.h (__exchange_and_add): Fix output
        constraint.

From-SVN: r75017

libstdc++-v3/ChangeLog

 2003-12-24  Andrew Pinski  <pinskia@physics.uc.edu>
 
+	* config/cpu/i386/atomicity.h (__exchange_and_add): Fix output 
+	constraint.
+
 	PR libstdc++/13480
-	* config/cpu/i486/atomicity.h: Split up read-write memory operand.
+	* config/cpu/i386/atomicity.h: Split up read-write memory operand.
 
 2003-12-23  Benjamin Kosnik  <bkoz@redhat.com>
 

libstdc++-v3/config/cpu/i386/atomicity.h

@@ -52,7 +52,7 @@ __exchange_and_add(volatile _Atomic_word* __mem, int __val)
   /* obtain the atomic exchange/add spin lock */
   do {
     __asm__ __volatile__ ("xchg{l} {%0,%1|%1,%0}"
-			  : "m" (__Atomicity_lock<0>::_S_atomicity_lock),
+			  : "=m" (__Atomicity_lock<0>::_S_atomicity_lock),
 			    "+r" (__tmp)
                           : "m" (__Atomicity_lock<0>::_S_atomicity_lock));
   } while (__tmp);