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Commit1a33436

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committed
Replace out-of-line tas() assembly code for MIPS with a properly
constrained GCC inline version. Thiemo Seufer, by way of Martin Pitt.
1 parent2613b74 commit1a33436

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2 files changed

+37
-37
lines changed

2 files changed

+37
-37
lines changed

‎src/backend/storage/lmgr/s_lock.c‎

Lines changed: 1 addition & 29 deletions
Original file line numberDiff line numberDiff line change
@@ -9,7 +9,7 @@
99
*
1010
*
1111
* IDENTIFICATION
12-
* $PostgreSQL: pgsql/src/backend/storage/lmgr/s_lock.c,v 1.36 2005/07/30 03:07:40 momjian Exp $
12+
* $PostgreSQL: pgsql/src/backend/storage/lmgr/s_lock.c,v 1.37 2005/08/25 17:17:09 tgl Exp $
1313
*
1414
*-------------------------------------------------------------------------
1515
*/
@@ -172,34 +172,6 @@ _success:\n\
172172
#endif/* __m68k__ */
173173

174174

175-
#if defined(__mips__)&& !defined(__sgi)
176-
staticvoid
177-
tas_dummy()
178-
{
179-
__asm____volatile__(
180-
"\
181-
.globaltas\n\
182-
tas:\n\
183-
.frame$sp, 0, $31\n\
184-
.set push\n\
185-
.set mips2\n\
186-
ll$14, 0($4)\n\
187-
or$15, $14, 1\n\
188-
sc$15, 0($4)\n\
189-
.set pop\n\
190-
beq$15, 0, fail\n\
191-
bne$14, 0, fail\n\
192-
li$2, 0\n\
193-
.livereg 0x2000FF0E,0x00000FFF\n\
194-
j$31\n\
195-
fail:\n\
196-
li$2, 1\n\
197-
j $31\n\
198-
");
199-
}
200-
#endif/* __mips__ && !__sgi */
201-
202-
203175
#else/* not __GNUC__ */
204176

205177
/*

‎src/include/storage/s_lock.h‎

Lines changed: 36 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -66,7 +66,7 @@
6666
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
6767
* Portions Copyright (c) 1994, Regents of the University of California
6868
*
69-
* $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.134 2005/03/10 21:41:01 momjian Exp $
69+
* $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.135 2005/08/25 17:17:10 tgl Exp $
7070
*
7171
*-------------------------------------------------------------------------
7272
*/
@@ -453,20 +453,48 @@ do \
453453
#endif/* __alpha || __alpha__ */
454454

455455

456-
/* These live in s_lock.c, but only for gcc */
456+
#if defined(__mips__)&& !defined(__sgi)
457+
/* Note: on SGI we use the OS' mutex ABI, see below */
458+
#defineHAS_TEST_AND_SET
457459

460+
typedefunsignedintslock_t;
458461

459-
#if defined(__m68k__)
460-
#defineHAS_TEST_AND_SET
462+
#defineTAS(lock) tas(lock)
461463

462-
typedefunsignedcharslock_t;
463-
#endif
464+
static __inline__int
465+
tas(volatileslock_t*lock)
466+
{
467+
registervolatileslock_t*__l=lock;
468+
registerint__r;
464469

470+
__asm__ __volatile__(
471+
" .set push \n"
472+
" .set mips2 \n"
473+
" .set noreorder \n"
474+
" .set nomacro \n"
475+
"1: ll %0, %1 \n"
476+
" bne %0, $0, 1f \n"
477+
" xori %0, 1 \n"
478+
" sc %0, %1 \n"
479+
" beq %0, $0, 1b \n"
480+
" sync \n"
481+
"1: .set pop "
482+
:"=&r" (__r),"+R" (*__l)
483+
:
484+
:"memory","cc");
485+
return__r;
486+
}
465487

466-
#if defined(__mips__)&& !defined(__sgi)
488+
#endif/* __mips__ && !__sgi */
489+
490+
491+
/* These live in s_lock.c, but only for gcc */
492+
493+
494+
#if defined(__m68k__)
467495
#defineHAS_TEST_AND_SET
468496

469-
typedefunsignedintslock_t;
497+
typedefunsignedcharslock_t;
470498
#endif
471499

472500

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