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authorRalf Baechle <ralf@linux-mips.org>2006-09-27 20:45:21 -0400
committerRalf Baechle <ralf@linux-mips.org>2007-02-13 17:40:50 -0500
commitf65e4fa8e0c6022ad58dc88d1b11b12589ed7f9f (patch)
tree2405e012e079693e0fcfde9ff981c549d6c68a21 /include/asm-mips
parent509cb37e173d4e39cec47238397e91b718730794 (diff)
[MIPS] Improve branch prediction in ll/sc atomic operations.
Now that finally all supported versions of binutils have functioning support for .subsection use .subsection to tweak the branch prediction I did not modify the R10000 errata variants because it seems unclear if this will invalidate the workaround which actually relies on the cheesy prediction of branch likely to cause a misspredict if the sc was successful. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips')
-rw-r--r--include/asm-mips/atomic.h50
-rw-r--r--include/asm-mips/bitops.h33
-rw-r--r--include/asm-mips/spinlock.h56
-rw-r--r--include/asm-mips/system.h20
4 files changed, 127 insertions, 32 deletions
diff --git a/include/asm-mips/atomic.h b/include/asm-mips/atomic.h
index c1a2409bb52a..8578869a8bcf 100644
--- a/include/asm-mips/atomic.h
+++ b/include/asm-mips/atomic.h
@@ -69,7 +69,10 @@ static __inline__ void atomic_add(int i, atomic_t * v)
69 "1: ll %0, %1 # atomic_add \n" 69 "1: ll %0, %1 # atomic_add \n"
70 " addu %0, %2 \n" 70 " addu %0, %2 \n"
71 " sc %0, %1 \n" 71 " sc %0, %1 \n"
72 " beqz %0, 1b \n" 72 " beqz %0, 2f \n"
73 " .subsection 2 \n"
74 "2: b 1b \n"
75 " .previous \n"
73 " .set mips0 \n" 76 " .set mips0 \n"
74 : "=&r" (temp), "=m" (v->counter) 77 : "=&r" (temp), "=m" (v->counter)
75 : "Ir" (i), "m" (v->counter)); 78 : "Ir" (i), "m" (v->counter));
@@ -111,7 +114,10 @@ static __inline__ void atomic_sub(int i, atomic_t * v)
111 "1: ll %0, %1 # atomic_sub \n" 114 "1: ll %0, %1 # atomic_sub \n"
112 " subu %0, %2 \n" 115 " subu %0, %2 \n"
113 " sc %0, %1 \n" 116 " sc %0, %1 \n"
114 " beqz %0, 1b \n" 117 " beqz %0, 2f \n"
118 " .subsection 2 \n"
119 "2: b 1b \n"
120 " .previous \n"
115 " .set mips0 \n" 121 " .set mips0 \n"
116 : "=&r" (temp), "=m" (v->counter) 122 : "=&r" (temp), "=m" (v->counter)
117 : "Ir" (i), "m" (v->counter)); 123 : "Ir" (i), "m" (v->counter));
@@ -155,8 +161,11 @@ static __inline__ int atomic_add_return(int i, atomic_t * v)
155 "1: ll %1, %2 # atomic_add_return \n" 161 "1: ll %1, %2 # atomic_add_return \n"
156 " addu %0, %1, %3 \n" 162 " addu %0, %1, %3 \n"
157 " sc %0, %2 \n" 163 " sc %0, %2 \n"
158 " beqz %0, 1b \n" 164 " beqz %0, 2f \n"
159 " addu %0, %1, %3 \n" 165 " addu %0, %1, %3 \n"
166 " .subsection 2 \n"
167 "2: b 1b \n"
168 " .previous \n"
160 " .set mips0 \n" 169 " .set mips0 \n"
161 : "=&r" (result), "=&r" (temp), "=m" (v->counter) 170 : "=&r" (result), "=&r" (temp), "=m" (v->counter)
162 : "Ir" (i), "m" (v->counter) 171 : "Ir" (i), "m" (v->counter)
@@ -204,8 +213,11 @@ static __inline__ int atomic_sub_return(int i, atomic_t * v)
204 "1: ll %1, %2 # atomic_sub_return \n" 213 "1: ll %1, %2 # atomic_sub_return \n"
205 " subu %0, %1, %3 \n" 214 " subu %0, %1, %3 \n"
206 " sc %0, %2 \n" 215 " sc %0, %2 \n"
207 " beqz %0, 1b \n" 216 " beqz %0, 2f \n"
208 " subu %0, %1, %3 \n" 217 " subu %0, %1, %3 \n"
218 " .subsection 2 \n"
219 "2: b 1b \n"
220 " .previous \n"
209 " .set mips0 \n" 221 " .set mips0 \n"
210 : "=&r" (result), "=&r" (temp), "=m" (v->counter) 222 : "=&r" (result), "=&r" (temp), "=m" (v->counter)
211 : "Ir" (i), "m" (v->counter) 223 : "Ir" (i), "m" (v->counter)
@@ -267,10 +279,13 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
267 " bltz %0, 1f \n" 279 " bltz %0, 1f \n"
268 " sc %0, %2 \n" 280 " sc %0, %2 \n"
269 " .set noreorder \n" 281 " .set noreorder \n"
270 " beqz %0, 1b \n" 282 " beqz %0, 2f \n"
271 " subu %0, %1, %3 \n" 283 " subu %0, %1, %3 \n"
272 " .set reorder \n" 284 " .set reorder \n"
273 "1: \n" 285 "1: \n"
286 " .subsection 2 \n"
287 "2: b 1b \n"
288 " .previous \n"
274 " .set mips0 \n" 289 " .set mips0 \n"
275 : "=&r" (result), "=&r" (temp), "=m" (v->counter) 290 : "=&r" (result), "=&r" (temp), "=m" (v->counter)
276 : "Ir" (i), "m" (v->counter) 291 : "Ir" (i), "m" (v->counter)
@@ -429,7 +444,10 @@ static __inline__ void atomic64_add(long i, atomic64_t * v)
429 "1: lld %0, %1 # atomic64_add \n" 444 "1: lld %0, %1 # atomic64_add \n"
430 " addu %0, %2 \n" 445 " addu %0, %2 \n"
431 " scd %0, %1 \n" 446 " scd %0, %1 \n"
432 " beqz %0, 1b \n" 447 " beqz %0, 2f \n"
448 " .subsection 2 \n"
449 "2: b 1b \n"
450 " .previous \n"
433 " .set mips0 \n" 451 " .set mips0 \n"
434 : "=&r" (temp), "=m" (v->counter) 452 : "=&r" (temp), "=m" (v->counter)
435 : "Ir" (i), "m" (v->counter)); 453 : "Ir" (i), "m" (v->counter));
@@ -471,7 +489,10 @@ static __inline__ void atomic64_sub(long i, atomic64_t * v)
471 "1: lld %0, %1 # atomic64_sub \n" 489 "1: lld %0, %1 # atomic64_sub \n"
472 " subu %0, %2 \n" 490 " subu %0, %2 \n"
473 " scd %0, %1 \n" 491 " scd %0, %1 \n"
474 " beqz %0, 1b \n" 492 " beqz %0, 2f \n"
493 " .subsection 2 \n"
494 "2: b 1b \n"
495 " .previous \n"
475 " .set mips0 \n" 496 " .set mips0 \n"
476 : "=&r" (temp), "=m" (v->counter) 497 : "=&r" (temp), "=m" (v->counter)
477 : "Ir" (i), "m" (v->counter)); 498 : "Ir" (i), "m" (v->counter));
@@ -515,8 +536,11 @@ static __inline__ long atomic64_add_return(long i, atomic64_t * v)
515 "1: lld %1, %2 # atomic64_add_return \n" 536 "1: lld %1, %2 # atomic64_add_return \n"
516 " addu %0, %1, %3 \n" 537 " addu %0, %1, %3 \n"
517 " scd %0, %2 \n" 538 " scd %0, %2 \n"
518 " beqz %0, 1b \n" 539 " beqz %0, 2f \n"
519 " addu %0, %1, %3 \n" 540 " addu %0, %1, %3 \n"
541 " .subsection 2 \n"
542 "2: b 1b \n"
543 " .previous \n"
520 " .set mips0 \n" 544 " .set mips0 \n"
521 : "=&r" (result), "=&r" (temp), "=m" (v->counter) 545 : "=&r" (result), "=&r" (temp), "=m" (v->counter)
522 : "Ir" (i), "m" (v->counter) 546 : "Ir" (i), "m" (v->counter)
@@ -564,8 +588,11 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t * v)
564 "1: lld %1, %2 # atomic64_sub_return \n" 588 "1: lld %1, %2 # atomic64_sub_return \n"
565 " subu %0, %1, %3 \n" 589 " subu %0, %1, %3 \n"
566 " scd %0, %2 \n" 590 " scd %0, %2 \n"
567 " beqz %0, 1b \n" 591 " beqz %0, 2f \n"
568 " subu %0, %1, %3 \n" 592 " subu %0, %1, %3 \n"
593 " .subsection 2 \n"
594 "2: b 1b \n"
595 " .previous \n"
569 " .set mips0 \n" 596 " .set mips0 \n"
570 : "=&r" (result), "=&r" (temp), "=m" (v->counter) 597 : "=&r" (result), "=&r" (temp), "=m" (v->counter)
571 : "Ir" (i), "m" (v->counter) 598 : "Ir" (i), "m" (v->counter)
@@ -627,10 +654,13 @@ static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v)
627 " bltz %0, 1f \n" 654 " bltz %0, 1f \n"
628 " scd %0, %2 \n" 655 " scd %0, %2 \n"
629 " .set noreorder \n" 656 " .set noreorder \n"
630 " beqz %0, 1b \n" 657 " beqz %0, 2f \n"
631 " dsubu %0, %1, %3 \n" 658 " dsubu %0, %1, %3 \n"
632 " .set reorder \n" 659 " .set reorder \n"
633 "1: \n" 660 "1: \n"
661 " .subsection 2 \n"
662 "2: b 1b \n"
663 " .previous \n"
634 " .set mips0 \n" 664 " .set mips0 \n"
635 : "=&r" (result), "=&r" (temp), "=m" (v->counter) 665 : "=&r" (result), "=&r" (temp), "=m" (v->counter)
636 : "Ir" (i), "m" (v->counter) 666 : "Ir" (i), "m" (v->counter)
diff --git a/include/asm-mips/bitops.h b/include/asm-mips/bitops.h
index 06445de1324b..06c08228a525 100644
--- a/include/asm-mips/bitops.h
+++ b/include/asm-mips/bitops.h
@@ -68,7 +68,10 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
68 "1: " __LL "%0, %1 # set_bit \n" 68 "1: " __LL "%0, %1 # set_bit \n"
69 " or %0, %2 \n" 69 " or %0, %2 \n"
70 " " __SC "%0, %1 \n" 70 " " __SC "%0, %1 \n"
71 " beqz %0, 1b \n" 71 " beqz %0, 2f \n"
72 " .subsection 2 \n"
73 "2: b 1b \n"
74 " .previous \n"
72 " .set mips0 \n" 75 " .set mips0 \n"
73 : "=&r" (temp), "=m" (*m) 76 : "=&r" (temp), "=m" (*m)
74 : "ir" (1UL << (nr & SZLONG_MASK)), "m" (*m)); 77 : "ir" (1UL << (nr & SZLONG_MASK)), "m" (*m));
@@ -116,7 +119,10 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
116 "1: " __LL "%0, %1 # clear_bit \n" 119 "1: " __LL "%0, %1 # clear_bit \n"
117 " and %0, %2 \n" 120 " and %0, %2 \n"
118 " " __SC "%0, %1 \n" 121 " " __SC "%0, %1 \n"
119 " beqz %0, 1b \n" 122 " beqz %0, 2f \n"
123 " .subsection 2 \n"
124 "2: b 1b \n"
125 " .previous \n"
120 " .set mips0 \n" 126 " .set mips0 \n"
121 : "=&r" (temp), "=m" (*m) 127 : "=&r" (temp), "=m" (*m)
122 : "ir" (~(1UL << (nr & SZLONG_MASK))), "m" (*m)); 128 : "ir" (~(1UL << (nr & SZLONG_MASK))), "m" (*m));
@@ -166,7 +172,10 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
166 "1: " __LL "%0, %1 # change_bit \n" 172 "1: " __LL "%0, %1 # change_bit \n"
167 " xor %0, %2 \n" 173 " xor %0, %2 \n"
168 " " __SC "%0, %1 \n" 174 " " __SC "%0, %1 \n"
169 " beqz %0, 1b \n" 175 " beqz %0, 2f \n"
176 " .subsection 2 \n"
177 "2: b 1b \n"
178 " .previous \n"
170 " .set mips0 \n" 179 " .set mips0 \n"
171 : "=&r" (temp), "=m" (*m) 180 : "=&r" (temp), "=m" (*m)
172 : "ir" (1UL << (nr & SZLONG_MASK)), "m" (*m)); 181 : "ir" (1UL << (nr & SZLONG_MASK)), "m" (*m));
@@ -222,8 +231,12 @@ static inline int test_and_set_bit(unsigned long nr,
222 "1: " __LL "%0, %1 # test_and_set_bit \n" 231 "1: " __LL "%0, %1 # test_and_set_bit \n"
223 " or %2, %0, %3 \n" 232 " or %2, %0, %3 \n"
224 " " __SC "%2, %1 \n" 233 " " __SC "%2, %1 \n"
225 " beqz %2, 1b \n" 234 " beqz %2, 2f \n"
226 " and %2, %0, %3 \n" 235 " and %2, %0, %3 \n"
236 " .subsection 2 \n"
237 "2: b 1b \n"
238 " nop \n"
239 " .previous \n"
227 " .set pop \n" 240 " .set pop \n"
228 : "=&r" (temp), "=m" (*m), "=&r" (res) 241 : "=&r" (temp), "=m" (*m), "=&r" (res)
229 : "r" (1UL << (nr & SZLONG_MASK)), "m" (*m) 242 : "r" (1UL << (nr & SZLONG_MASK)), "m" (*m)
@@ -290,8 +303,12 @@ static inline int test_and_clear_bit(unsigned long nr,
290 " or %2, %0, %3 \n" 303 " or %2, %0, %3 \n"
291 " xor %2, %3 \n" 304 " xor %2, %3 \n"
292 " " __SC "%2, %1 \n" 305 " " __SC "%2, %1 \n"
293 " beqz %2, 1b \n" 306 " beqz %2, 2f \n"
294 " and %2, %0, %3 \n" 307 " and %2, %0, %3 \n"
308 " .subsection 2 \n"
309 "2: b 1b \n"
310 " nop \n"
311 " .previous \n"
295 " .set pop \n" 312 " .set pop \n"
296 : "=&r" (temp), "=m" (*m), "=&r" (res) 313 : "=&r" (temp), "=m" (*m), "=&r" (res)
297 : "r" (1UL << (nr & SZLONG_MASK)), "m" (*m) 314 : "r" (1UL << (nr & SZLONG_MASK)), "m" (*m)
@@ -356,8 +373,12 @@ static inline int test_and_change_bit(unsigned long nr,
356 "1: " __LL "%0, %1 # test_and_change_bit \n" 373 "1: " __LL "%0, %1 # test_and_change_bit \n"
357 " xor %2, %0, %3 \n" 374 " xor %2, %0, %3 \n"
358 " " __SC "\t%2, %1 \n" 375 " " __SC "\t%2, %1 \n"
359 " beqz %2, 1b \n" 376 " beqz %2, 2f \n"
360 " and %2, %0, %3 \n" 377 " and %2, %0, %3 \n"
378 " .subsection 2 \n"
379 "2: b 1b \n"
380 " nop \n"
381 " .previous \n"
361 " .set pop \n" 382 " .set pop \n"
362 : "=&r" (temp), "=m" (*m), "=&r" (res) 383 : "=&r" (temp), "=m" (*m), "=&r" (res)
363 : "r" (1UL << (nr & SZLONG_MASK)), "m" (*m) 384 : "r" (1UL << (nr & SZLONG_MASK)), "m" (*m)
diff --git a/include/asm-mips/spinlock.h b/include/asm-mips/spinlock.h
index fc3217fc1118..f1755d28a36a 100644
--- a/include/asm-mips/spinlock.h
+++ b/include/asm-mips/spinlock.h
@@ -3,7 +3,7 @@
3 * License. See the file "COPYING" in the main directory of this archive 3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details. 4 * for more details.
5 * 5 *
6 * Copyright (C) 1999, 2000, 06 by Ralf Baechle 6 * Copyright (C) 1999, 2000, 06 Ralf Baechle (ralf@linux-mips.org)
7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc. 7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
8 */ 8 */
9#ifndef _ASM_SPINLOCK_H 9#ifndef _ASM_SPINLOCK_H
@@ -49,11 +49,18 @@ static inline void __raw_spin_lock(raw_spinlock_t *lock)
49 __asm__ __volatile__( 49 __asm__ __volatile__(
50 " .set noreorder # __raw_spin_lock \n" 50 " .set noreorder # __raw_spin_lock \n"
51 "1: ll %1, %2 \n" 51 "1: ll %1, %2 \n"
52 " bnez %1, 1b \n" 52 " bnez %1, 2f \n"
53 " li %1, 1 \n" 53 " li %1, 1 \n"
54 " sc %1, %0 \n" 54 " sc %1, %0 \n"
55 " beqz %1, 1b \n" 55 " beqz %1, 2f \n"
56 " nop \n" 56 " nop \n"
57 " .subsection 2 \n"
58 "2: ll %1, %2 \n"
59 " bnez %1, 2b \n"
60 " li %1, 1 \n"
61 " b 1b \n"
62 " nop \n"
63 " .previous \n"
57 " .set reorder \n" 64 " .set reorder \n"
58 : "=m" (lock->lock), "=&r" (tmp) 65 : "=m" (lock->lock), "=&r" (tmp)
59 : "m" (lock->lock) 66 : "m" (lock->lock)
@@ -99,8 +106,12 @@ static inline unsigned int __raw_spin_trylock(raw_spinlock_t *lock)
99 "1: ll %0, %3 \n" 106 "1: ll %0, %3 \n"
100 " ori %2, %0, 1 \n" 107 " ori %2, %0, 1 \n"
101 " sc %2, %1 \n" 108 " sc %2, %1 \n"
102 " beqz %2, 1b \n" 109 " beqz %2, 2f \n"
103 " andi %2, %0, 1 \n" 110 " andi %2, %0, 1 \n"
111 " .subsection 2 \n"
112 "2: b 1b \n"
113 " nop \n"
114 " .previous \n"
104 " .set reorder" 115 " .set reorder"
105 : "=&r" (temp), "=m" (lock->lock), "=&r" (res) 116 : "=&r" (temp), "=m" (lock->lock), "=&r" (res)
106 : "m" (lock->lock) 117 : "m" (lock->lock)
@@ -154,11 +165,18 @@ static inline void __raw_read_lock(raw_rwlock_t *rw)
154 __asm__ __volatile__( 165 __asm__ __volatile__(
155 " .set noreorder # __raw_read_lock \n" 166 " .set noreorder # __raw_read_lock \n"
156 "1: ll %1, %2 \n" 167 "1: ll %1, %2 \n"
157 " bltz %1, 1b \n" 168 " bltz %1, 2f \n"
158 " addu %1, 1 \n" 169 " addu %1, 1 \n"
159 " sc %1, %0 \n" 170 " sc %1, %0 \n"
160 " beqz %1, 1b \n" 171 " beqz %1, 1b \n"
161 " nop \n" 172 " nop \n"
173 " .subsection 2 \n"
174 "2: ll %1, %2 \n"
175 " bltz %1, 2b \n"
176 " addu %1, 1 \n"
177 " b 1b \n"
178 " nop \n"
179 " .previous \n"
162 " .set reorder \n" 180 " .set reorder \n"
163 : "=m" (rw->lock), "=&r" (tmp) 181 : "=m" (rw->lock), "=&r" (tmp)
164 : "m" (rw->lock) 182 : "m" (rw->lock)
@@ -192,8 +210,12 @@ static inline void __raw_read_unlock(raw_rwlock_t *rw)
192 "1: ll %1, %2 \n" 210 "1: ll %1, %2 \n"
193 " sub %1, 1 \n" 211 " sub %1, 1 \n"
194 " sc %1, %0 \n" 212 " sc %1, %0 \n"
195 " beqz %1, 1b \n" 213 " beqz %1, 2f \n"
214 " nop \n"
215 " .subsection 2 \n"
216 "2: b 1b \n"
196 " nop \n" 217 " nop \n"
218 " .previous \n"
197 " .set reorder \n" 219 " .set reorder \n"
198 : "=m" (rw->lock), "=&r" (tmp) 220 : "=m" (rw->lock), "=&r" (tmp)
199 : "m" (rw->lock) 221 : "m" (rw->lock)
@@ -222,11 +244,18 @@ static inline void __raw_write_lock(raw_rwlock_t *rw)
222 __asm__ __volatile__( 244 __asm__ __volatile__(
223 " .set noreorder # __raw_write_lock \n" 245 " .set noreorder # __raw_write_lock \n"
224 "1: ll %1, %2 \n" 246 "1: ll %1, %2 \n"
225 " bnez %1, 1b \n" 247 " bnez %1, 2f \n"
226 " lui %1, 0x8000 \n" 248 " lui %1, 0x8000 \n"
227 " sc %1, %0 \n" 249 " sc %1, %0 \n"
228 " beqz %1, 1b \n" 250 " beqz %1, 2f \n"
251 " nop \n"
252 " .subsection 2 \n"
253 "2: ll %1, %2 \n"
254 " bnez %1, 2b \n"
255 " lui %1, 0x8000 \n"
256 " b 1b \n"
229 " nop \n" 257 " nop \n"
258 " .previous \n"
230 " .set reorder \n" 259 " .set reorder \n"
231 : "=m" (rw->lock), "=&r" (tmp) 260 : "=m" (rw->lock), "=&r" (tmp)
232 : "m" (rw->lock) 261 : "m" (rw->lock)
@@ -322,12 +351,15 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
322 " bnez %1, 2f \n" 351 " bnez %1, 2f \n"
323 " lui %1, 0x8000 \n" 352 " lui %1, 0x8000 \n"
324 " sc %1, %0 \n" 353 " sc %1, %0 \n"
325 " beqz %1, 1b \n" 354 " beqz %1, 3f \n"
326 " nop \n" 355 " li %2, 1 \n"
356 "2: \n"
327 __WEAK_ORDERING_MB 357 __WEAK_ORDERING_MB
328 " li %2, 1 \n" 358 " .subsection 2 \n"
359 "3: b 1b \n"
360 " li %2, 0 \n"
361 " .previous \n"
329 " .set reorder \n" 362 " .set reorder \n"
330 "2: \n"
331 : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret) 363 : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret)
332 : "m" (rw->lock) 364 : "m" (rw->lock)
333 : "memory"); 365 : "memory");
diff --git a/include/asm-mips/system.h b/include/asm-mips/system.h
index 5e1289c85ed9..597a3743f6a1 100644
--- a/include/asm-mips/system.h
+++ b/include/asm-mips/system.h
@@ -110,7 +110,10 @@ static inline unsigned long __xchg_u32(volatile int * m, unsigned int val)
110 " move %2, %z4 \n" 110 " move %2, %z4 \n"
111 " .set mips3 \n" 111 " .set mips3 \n"
112 " sc %2, %1 \n" 112 " sc %2, %1 \n"
113 " beqz %2, 1b \n" 113 " beqz %2, 2f \n"
114 " .subsection 2 \n"
115 "2: b 1b \n"
116 " .previous \n"
114 " .set mips0 \n" 117 " .set mips0 \n"
115 : "=&r" (retval), "=m" (*m), "=&r" (dummy) 118 : "=&r" (retval), "=m" (*m), "=&r" (dummy)
116 : "R" (*m), "Jr" (val) 119 : "R" (*m), "Jr" (val)
@@ -155,7 +158,10 @@ static inline __u64 __xchg_u64(volatile __u64 * m, __u64 val)
155 "1: lld %0, %3 # xchg_u64 \n" 158 "1: lld %0, %3 # xchg_u64 \n"
156 " move %2, %z4 \n" 159 " move %2, %z4 \n"
157 " scd %2, %1 \n" 160 " scd %2, %1 \n"
158 " beqz %2, 1b \n" 161 " beqz %2, 2f \n"
162 " .subsection 2 \n"
163 "2: b 1b \n"
164 " .previous \n"
159 " .set mips0 \n" 165 " .set mips0 \n"
160 : "=&r" (retval), "=m" (*m), "=&r" (dummy) 166 : "=&r" (retval), "=m" (*m), "=&r" (dummy)
161 : "R" (*m), "Jr" (val) 167 : "R" (*m), "Jr" (val)
@@ -232,8 +238,11 @@ static inline unsigned long __cmpxchg_u32(volatile int * m, unsigned long old,
232 " move $1, %z4 \n" 238 " move $1, %z4 \n"
233 " .set mips3 \n" 239 " .set mips3 \n"
234 " sc $1, %1 \n" 240 " sc $1, %1 \n"
235 " beqz $1, 1b \n" 241 " beqz $1, 3f \n"
236 "2: \n" 242 "2: \n"
243 " .subsection 2 \n"
244 "3: b 1b \n"
245 " .previous \n"
237 " .set pop \n" 246 " .set pop \n"
238 : "=&r" (retval), "=R" (*m) 247 : "=&r" (retval), "=R" (*m)
239 : "R" (*m), "Jr" (old), "Jr" (new) 248 : "R" (*m), "Jr" (old), "Jr" (new)
@@ -283,8 +292,11 @@ static inline unsigned long __cmpxchg_u64(volatile int * m, unsigned long old,
283 " bne %0, %z3, 2f \n" 292 " bne %0, %z3, 2f \n"
284 " move $1, %z4 \n" 293 " move $1, %z4 \n"
285 " scd $1, %1 \n" 294 " scd $1, %1 \n"
286 " beqz $1, 1b \n" 295 " beqz $1, 3f \n"
287 "2: \n" 296 "2: \n"
297 " .subsection 2 \n"
298 "3: b 1b \n"
299 " .previous \n"
288 " .set pop \n" 300 " .set pop \n"
289 : "=&r" (retval), "=R" (*m) 301 : "=&r" (retval), "=R" (*m)
290 : "R" (*m), "Jr" (old), "Jr" (new) 302 : "R" (*m), "Jr" (old), "Jr" (new)
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-03 15:33:37 -0400