atomicity.h (__compare_and_swap): Remove unused function.

[gcc.git] / libstdc++-v3 / config / cpu / sparc / sparc32 / bits / atomicity.h

diff --git a/libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h b/libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h
index fefe3fdac5235acf5c7e5df9fb8d3c19ea752688..6f9412cd5b4e85c7d509a83737f27e9e95a5e38c 100644 (file)
--- a/libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h
+++ b/libstdc++-v3/config/cpu/sparc/sparc32/bits/atomicity.h
@@ -76,33 +76,4 @@ __atomic_add (volatile _Atomic_word* __mem, int __val)
                       : "memory");
 }
 
-static int
-__attribute__ ((__unused__))
-__compare_and_swap (volatile long *__p, long __oldval, long __newval)
-{
-  static unsigned char __lock;
-  long __ret, __tmp;
-
-  __asm__ __volatile__("1:     ldstub  [%1], %0\n\t"
-                      "        cmp     %0, 0\n\t"
-                      "        bne     1b\n\t"
-                      "         nop"
-                      : "=&r" (__tmp)
-                      : "r" (&__lock)
-                      : "memory");
-  if (*__p != __oldval)
-    __ret = 0;
-  else
-    {
-      *__p = __newval;
-      __ret = 1;
-    }
-  __asm__ __volatile__("stb    %%g0, [%0]"
-                      : /* no outputs */
-                      : "r" (&__lock)
-                      : "memory");
-
-  return __ret;
-}
-
 #endif /* atomicity.h */