> > I'll re-check that with the ppc architecture guy here.

bmomjian · bmomjian · commit ceb4f5ea9c2c · 2002-11-10T00:33:43.000Z
&gt;
&gt; ... he is now about to write an inlined version that can go into
&gt; s_lock.h . I'll send the new patch later on...

OK, here it comes:

An inlined version of tas(), that works for both, powerpc and
powerpc64. The patch is against 7.3b5 and passes the test suite on
both architectures.

Reinhard Max
diff --git a/src/backend/storage/lmgr/s_lock.c b/src/backend/storage/lmgr/s_lock.c
@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/lmgr/s_lock.c,v 1.9 2002/09/21 00:14:05 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/storage/lmgr/s_lock.c,v 1.10 2002/11/10 00:33:43 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -144,31 +144,6 @@ success:						\n\
 }
 #endif   /* __APPLE__ && __ppc__ */
 
-#if defined(__powerpc__)
-/* Note: need a nice gcc constrained asm version so it can be inlined */
-static void
-tas_dummy()
-{
-	__asm__		__volatile__(
-										 "\
-.global tas 					\n\
-tas:							\n\
-			lwarx	5,0,3		\n\
-			cmpwi 	5,0 		\n\
-			bne 	fail		\n\
-			addi 	5,5,1		\n\
-			stwcx.	5,0,3		\n\
-			beq 	success 	\n\
-fail:		li		3,1 		\n\
-			blr 				\n\
-success:						\n\
-			isync				\n\
-			li 		3,0			\n\
-			blr					\n\
-");
-}
-#endif   /* __powerpc__ */
-
 #if defined(__mips__) && !defined(__sgi)
 static void
 tas_dummy()
diff --git a/src/include/port/linux.h b/src/include/port/linux.h
@@ -14,6 +14,11 @@ typedef unsigned char slock_t;
 
 #define HAS_TEST_AND_SET
 
+#elif defined(__powerpc64__)
+typedef unsigned long slock_t;
+
+#define HAS_TEST_AND_SET
+
 #elif defined(__powerpc__)
 typedef unsigned int slock_t;
 
diff --git a/src/include/storage/s_lock.h b/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 1.101 2002/09/21 00:14:05 tgl Exp $
+ *	  $Id: s_lock.h,v 1.102 2002/11/10 00:33:43 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -194,6 +194,35 @@ tas(volatile slock_t *lock)
 
 #endif	 /* __sparc__ */
 
+#if defined(__powerpc__) || defined(__powerpc64__)
+static __inline__ int
+tas(volatile slock_t *lock)
+{
+	slock_t _t;
+	int _res;
+
+	__asm__ __volatile__(
+"	lwarx   %0,0,%3		\n"
+"	cmpwi   %0,0		\n"
+"	bne     1f		\n"
+"	addi    %0,%0,1		\n"
+"	stwcx.  %0,0,%3		\n"
+"	isync			\n"
+"	beq     2f         	\n"
+"1:	li      %2,1		\n"
+"	b	3f		\n"
+"2:				\n"
+"	li      %2,0		\n"
+"3:				\n"
+
+:	"=&r" (_t), "=m" (lock), "=r" (_res)
+:	"r" (lock)
+:	"cc", "memory"
+	);
+	return _res;
+}
+#endif
+
 
 #if defined(__mc68000__) && defined(__linux__)
 #define TAS(lock) tas(lock)
