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Commit63e39ab

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committed
O2. Seems tas() for PPC (storage/buffer/s_lock.c) never works if
compiled with -O0. Included are patches that should fix the problem(of course I have confirmed -O2 works with this patch).BTW, here is a platforms/regression test failure(serious one--backenddeath) matrix.Tatsuo Ishii
1 parent8111066 commit63e39ab

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1 file changed

+16
-13
lines changed

1 file changed

+16
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‎src/backend/storage/buffer/s_lock.c

Lines changed: 16 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/storage/buffer/Attic/s_lock.c,v 1.9 1998/09/01 04:31:44 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/storage/buffer/Attic/s_lock.c,v 1.10 1998/09/03 02:14:39 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
@@ -95,20 +95,23 @@ s_lock(volatile slock_t *lock, const char *file, const int line)
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#if defined(PPC)
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/* Note: need a nice gcc constrained asm version so it can be inlined */
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int
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tas(volatileslock_t*lock)
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staticvoid
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tas_dummy()
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{
101-
__asm__("lwarx5,0,3\n\
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cmpwi5,0\n\
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bnefail\n\
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addi5,5,1\n\
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__asm__("\n\
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.globaltas\n\
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tas:\n\
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lwarx5,0,3\n\
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cmpwi5,0\n\
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bnefail\n\
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addi5,5,1\n\
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stwcx. 5,0,3\n\
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beqsuccess\n\
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fail:li3,1\n\
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blr\n\
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success:\n\
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li 3,0\n\
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blr\n\
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beqsuccess\n\
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fail:li3,1\n\
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blr\n\
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success:\n\
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li 3,0\n\
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blr\n\
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");
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}
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