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Tighten up register usage for inline PPC version of tas().

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This commit is contained in:
Tom Lane 2003-04-04 06:57:39 +00:00
parent cd35d601b8
commit eb5e4c58d1
1 changed files with 6 additions and 6 deletions
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12
src/include/storage/s_lock.h
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@ -63,7 +63,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* $Id: s_lock.h,v 1.104 2003/04/04 05:32:30 tgl Exp $ * $Id: s_lock.h,v 1.105 2003/04/04 06:57:39 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -229,20 +229,20 @@ tas(volatile slock_t *lock)
int _res; int _res;
__asm__ __volatile__( __asm__ __volatile__(
" lwarx %0,0,%3 \n" " lwarx %0,0,%2 \n"
" cmpwi %0,0 \n" " cmpwi %0,0 \n"
" bne 1f \n" " bne 1f \n"
" addi %0,%0,1 \n" " addi %0,%0,1 \n"
" stwcx. %0,0,%3 \n" " stwcx. %0,0,%2 \n"
" beq 2f \n" " beq 2f \n"
"1: li %2,1 \n" "1: li %1,1 \n"
" b 3f \n" " b 3f \n"
"2: \n" "2: \n"
" isync \n" " isync \n"
" li %2,0 \n" " li %1,0 \n"
"3: \n" "3: \n"
: "=&r" (_t), "=m" (lock), "=r" (_res) : "=&r" (_t), "=r" (_res)
: "r" (lock) : "r" (lock)
: "cc", "memory" : "cc", "memory"
); );