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O2. Seems tas() for PPC (storage/buffer/s_lock.c) never works if

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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--backend
death) matrix.

Tatsuo Ishii
This commit is contained in:
Bruce Momjian 1998-09-03 02:14:39 +00:00
parent 811106676e
commit 63e39ab9a9
1 changed files with 16 additions and 13 deletions
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29
src/backend/storage/buffer/s_lock.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/Attic/s_lock.c,v 1.9 1998/09/01 04:31:44 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/Attic/s_lock.c,v 1.10 1998/09/03 02:14:39 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -95,20 +95,23 @@ s_lock(volatile slock_t *lock, const char *file, const int line)
#if defined(PPC)
/* Note: need a nice gcc constrained asm version so it can be inlined */
int
tas(volatile slock_t *lock)
static void
tas_dummy()
{
__asm__("lwarx 5,0,3 \n\
cmpwi 5,0 \n\
bne fail \n\
addi 5,5,1 \n\
__asm__(" \n\
.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\
li 3,0 \n\
blr \n\
beq success \n\
fail: li 3,1 \n\
blr \n\
success: \n\
li 3,0 \n\
blr \n\
");
}