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Another try at the inlined MIPS spinlock code. Can't test this myself, 

but for sure it's not any more broken than the prior version.
This commit is contained in:
Tom Lane 2005-08-26 22:04:42 +00:00
parent f9244df78f
commit 846319db3f
1 changed files with 12 additions and 12 deletions
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24
src/include/storage/s_lock.h
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@ -66,7 +66,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.136 2005/08/26 14:47:35 tgl Exp $
* $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.137 2005/08/26 22:04:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -464,25 +464,25 @@ typedef unsigned int slock_t;
static __inline__ int
tas(volatile slock_t *lock)
{
register volatile slock_t *__l = lock;
register int __r;
register volatile slock_t *_l = lock;
register int _res;
register int _tmp;
__asm__ __volatile__(
" .set push \n"
" .set mips2 \n"
" .set noreorder \n"
" .set nomacro \n"
"1: ll %0, %1 \n"
" bne %0, $0, 1f \n"
" xori %0, 1 \n"
" sc %0, %1 \n"
" beq %0, $0, 1b \n"
" sync \n"
" ll %0, %2 \n"
" or %1, %0, $1 \n"
" sc %1, %2 \n"
" xori %1, $1 \n"
" or %0, %0, %1 \n"
"1: .set pop "
: "=&r" (__r), "+R" (*__l)
: "=&r" (_res), "=&r" (_tmp), "+R" (*_l)
:
: "memory", "cc");
return __r;
: "memory");
return _res;
}
#endif /* __mips__ && !__sgi */