--- postgresql-8.1.4/src/include/storage/s_lock.h	2005-10-11 13:41:32.000000000 -0700
+++ postgresql-8.1.4.dev/src/include/storage/s_lock.h	2006-05-26 05:48:32.000000000 -0700
@@ -299,6 +299,30 @@ tas(volatile slock_t *lock)
 
 #endif	 /* __s390__ || __s390x__ */
 
+#if defined(__sh__)
+#define HAS_TEST_AND_SET
+
+typedef unsigned char slock_t;
+
+#define TAS(lock) tas(lock)
+
+static __inline__ int
+tas(volatile slock_t *lock)
+{
+       register int _res = 1;
+
+       __asm__ __volatile__(
+               "tas.b  @%1\n\t"
+               "movt   %0\n\t"
+               "xor    #1,%0"
+:              "=z"(_res)
+:              "r"(lock)
+:              "t","memory");
+       return _res;
+}
+
+#endif  /* __sh__ */
+
 
 #if defined(__sparc__)
 #define HAS_TEST_AND_SET