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review.evervolv.com / android_kernel_htc_msm8960 / ec33679d78f9d653a44ddba10b5fb824c06330a1 / . / arch / sparc / lib / bitops.S
blob: 3dc61d5537c08a6ad56f37b90df340a527298bb7 [file] [log] [blame]
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]1/* bitops.S: Sparc64 atomic bit operations.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2 *
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]3 * Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4 */
5
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]6#include <asm/asi.h>
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]7#include <asm/backoff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]8
David S. Millerb445e262005-06-27 15:42:04 -0700[diff] [blame]9 .text
10
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]11 .globl test_and_set_bit
12 .type test_and_set_bit,#function
13test_and_set_bit: /* %o0=nr, %o1=addr */
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]14 BACKOFF_SETUP(%o3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]15 srlx %o0, 6, %g1
16 mov 1, %o2
17 sllx %g1, 3, %g3
18 and %o0, 63, %g2
19 sllx %o2, %g2, %o2
20 add %o1, %g3, %o1
211: ldx [%o1], %g7
22 or %g7, %o2, %g1
23 casx [%o1], %g7, %g1
24 cmp %g7, %g1
David S. Miller0f581892010-08-18 22:53:26 -0700[diff] [blame]25 bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]26 and %g7, %o2, %g2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]27 clr %o0
David S. Millerb445e262005-06-27 15:42:04 -0700[diff] [blame]28 movrne %g2, 1, %o0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]29 retl
David S. Millerb445e262005-06-27 15:42:04 -0700[diff] [blame]30 nop
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]312: BACKOFF_SPIN(%o3, %o4, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]32 .size test_and_set_bit, .-test_and_set_bit
33
34 .globl test_and_clear_bit
35 .type test_and_clear_bit,#function
36test_and_clear_bit: /* %o0=nr, %o1=addr */
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]37 BACKOFF_SETUP(%o3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]38 srlx %o0, 6, %g1
39 mov 1, %o2
40 sllx %g1, 3, %g3
41 and %o0, 63, %g2
42 sllx %o2, %g2, %o2
43 add %o1, %g3, %o1
441: ldx [%o1], %g7
45 andn %g7, %o2, %g1
46 casx [%o1], %g7, %g1
47 cmp %g7, %g1
David S. Miller0f581892010-08-18 22:53:26 -0700[diff] [blame]48 bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]49 and %g7, %o2, %g2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]50 clr %o0
David S. Millerb445e262005-06-27 15:42:04 -0700[diff] [blame]51 movrne %g2, 1, %o0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]52 retl
David S. Millerb445e262005-06-27 15:42:04 -0700[diff] [blame]53 nop
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]542: BACKOFF_SPIN(%o3, %o4, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]55 .size test_and_clear_bit, .-test_and_clear_bit
56
57 .globl test_and_change_bit
58 .type test_and_change_bit,#function
59test_and_change_bit: /* %o0=nr, %o1=addr */
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]60 BACKOFF_SETUP(%o3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]61 srlx %o0, 6, %g1
62 mov 1, %o2
63 sllx %g1, 3, %g3
64 and %o0, 63, %g2
65 sllx %o2, %g2, %o2
66 add %o1, %g3, %o1
671: ldx [%o1], %g7
68 xor %g7, %o2, %g1
69 casx [%o1], %g7, %g1
70 cmp %g7, %g1
David S. Miller0f581892010-08-18 22:53:26 -0700[diff] [blame]71 bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]72 and %g7, %o2, %g2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]73 clr %o0
David S. Millerb445e262005-06-27 15:42:04 -0700[diff] [blame]74 movrne %g2, 1, %o0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]75 retl
David S. Millerb445e262005-06-27 15:42:04 -0700[diff] [blame]76 nop
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]772: BACKOFF_SPIN(%o3, %o4, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]78 .size test_and_change_bit, .-test_and_change_bit
79
80 .globl set_bit
81 .type set_bit,#function
82set_bit: /* %o0=nr, %o1=addr */
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]83 BACKOFF_SETUP(%o3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]84 srlx %o0, 6, %g1
85 mov 1, %o2
86 sllx %g1, 3, %g3
87 and %o0, 63, %g2
88 sllx %o2, %g2, %o2
89 add %o1, %g3, %o1
901: ldx [%o1], %g7
91 or %g7, %o2, %g1
92 casx [%o1], %g7, %g1
93 cmp %g7, %g1
David S. Miller0f581892010-08-18 22:53:26 -0700[diff] [blame]94 bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]95 nop
96 retl
97 nop
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]982: BACKOFF_SPIN(%o3, %o4, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]99 .size set_bit, .-set_bit
100
101 .globl clear_bit
102 .type clear_bit,#function
103clear_bit: /* %o0=nr, %o1=addr */
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]104 BACKOFF_SETUP(%o3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]105 srlx %o0, 6, %g1
106 mov 1, %o2
107 sllx %g1, 3, %g3
108 and %o0, 63, %g2
109 sllx %o2, %g2, %o2
110 add %o1, %g3, %o1
1111: ldx [%o1], %g7
112 andn %g7, %o2, %g1
113 casx [%o1], %g7, %g1
114 cmp %g7, %g1
David S. Miller0f581892010-08-18 22:53:26 -0700[diff] [blame]115 bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]116 nop
117 retl
118 nop
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]1192: BACKOFF_SPIN(%o3, %o4, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]120 .size clear_bit, .-clear_bit
121
122 .globl change_bit
123 .type change_bit,#function
124change_bit: /* %o0=nr, %o1=addr */
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]125 BACKOFF_SETUP(%o3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]126 srlx %o0, 6, %g1
127 mov 1, %o2
128 sllx %g1, 3, %g3
129 and %o0, 63, %g2
130 sllx %o2, %g2, %o2
131 add %o1, %g3, %o1
1321: ldx [%o1], %g7
133 xor %g7, %o2, %g1
134 casx [%o1], %g7, %g1
135 cmp %g7, %g1
David S. Miller0f581892010-08-18 22:53:26 -0700[diff] [blame]136 bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]137 nop
138 retl
139 nop
David S. Miller24f287e2007-10-15 16:41:44 -0700[diff] [blame]1402: BACKOFF_SPIN(%o3, %o4, 1b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]141 .size change_bit, .-change_bit