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Get the MIPS assembler syntax right. Also add a separate sync command;

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the reference I consulted yesterday said SC does a SYNC, but apparently
this is not true on newer MIPS processors, so be safe.
This commit is contained in:
Tom Lane
2005-08-27 16:22:58 +00:00
parent 9a6f3630cf
commit 5677c28c91
1 changed files with 6 additions and 4 deletions
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10
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 1.133.4.2 2005/08/26 22:04:53 tgl Exp $
* $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.133.4.3 2005/08/27 16:22:58 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -440,6 +440,7 @@ do \
#if defined(__mips__) && !defined(__sgi)
/* Note: on SGI we use the OS' mutex ABI, see below */
/* Note: R10000 processors require a separate SYNC */
#define HAS_TEST_AND_SET
typedef unsigned int slock_t;
@@ -459,11 +460,12 @@ tas(volatile slock_t *lock)
" .set noreorder \n"
" .set nomacro \n"
" ll %0, %2 \n"
" or %1, %0, $1 \n"
" or %1, %0, 1 \n"
" sc %1, %2 \n"
" xori %1, $1 \n"
" xori %1, 1 \n"
" or %0, %0, %1 \n"
"1: .set pop "
" sync \n"
" .set pop "
: "=&r" (_res), "=&r" (_tmp), "+R" (*_l)
:
: "memory");