Apple's assembler likes the inlined TAS syntax too, so no reason to

maintain a separate out-of-line version of PPC tas() anymore.
Also fix S_UNLOCK for __powerpc64__ platforms.

Author: tglsfdc

src/backend/storage/lmgr/s_lock.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/lmgr/s_lock.c,v 1.10 2002/11/10 00:33:43 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/storage/lmgr/s_lock.c,v 1.11 2003/04/20 21:54:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -111,39 +111,6 @@ _success:						\n\
 }
 #endif   /* __m68k__ */
 
-#if defined(__APPLE__) && defined(__ppc__)
-/* used in darwin. */
-/* We key off __APPLE__ here because this function differs from
- * the LinuxPPC implementation only in compiler syntax.
- *
- * NOTE: per the Enhanced PowerPC Architecture manual, v1.0 dated 7-May-2002,
- * an isync is a sufficient synchronization barrier after a lwarx/stwcx loop.
- */
-static void
-tas_dummy()
-{
-	__asm__		__volatile__(
-										 "\
-			.globl 	tas			\n\
-			.globl 	_tas		\n\
-_tas:							\n\
-tas:							\n\
-			lwarx	r5,0,r3		\n\
-			cmpwi 	r5,0		\n\
-			bne 	fail		\n\
-			addi 	r5,r5,1		\n\
-			stwcx. 	r5,0,r3		\n\
-			beq 	success		\n\
-fail:		li 		r3,1		\n\
-			blr 				\n\
-success:						\n\
-			isync				\n\
-			li 		r3,0		\n\
-			blr					\n\
-");
-}
-#endif   /* __APPLE__ && __ppc__ */
-
 #if defined(__mips__) && !defined(__sgi)
 static void
 tas_dummy()

src/include/storage/s_lock.h

@@ -63,7 +63,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	  $Id: s_lock.h,v 1.105 2003/04/04 06:57:39 tgl Exp $
+ *	  $Id: s_lock.h,v 1.106 2003/04/20 21:54:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -221,7 +221,12 @@ tas(volatile slock_t *lock)
 
 #endif	 /* __sparc__ */
 
-#if defined(__powerpc__) || defined(__powerpc64__)
+#if defined(__ppc__) || defined(__powerpc__) || defined(__powerpc64__)
+#define TAS(lock) tas(lock)
+/*
+ * NOTE: per the Enhanced PowerPC Architecture manual, v1.0 dated 7-May-2002,
+ * an isync is a sufficient synchronization barrier after a lwarx/stwcx loop.
+ */
 static __inline__ int
 tas(volatile slock_t *lock)
 {
@@ -248,7 +253,8 @@ tas(volatile slock_t *lock)
 	);
 	return _res;
 }
-#endif
+
+#endif /* powerpc */
 
 
 #if defined(__mc68000__) && defined(__linux__)
@@ -273,10 +279,9 @@ tas(volatile slock_t *lock)
 #endif	 /* defined(__mc68000__) && defined(__linux__) */
 
 
-#if defined(__ppc__) || defined(__powerpc__)
+#if defined(__ppc__) || defined(__powerpc__) || defined(__powerpc64__)
 /*
- * We currently use out-of-line assembler for TAS on PowerPC; see s_lock.c.
- * S_UNLOCK is almost standard but requires a "sync" instruction.
+ * PowerPC S_UNLOCK is almost standard but requires a "sync" instruction.
  */
 #define S_UNLOCK(lock)	\
 do \
@@ -285,7 +290,7 @@ do \
 	*((volatile slock_t *) (lock)) = 0; \
 } while (0)
 
-#endif /* defined(__ppc__) || defined(__powerpc__) */
+#endif /* powerpc */
 
 
 #if defined(NEED_VAX_TAS_ASM)