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-rw-r--r--arch/frv/lib/atomic64-ops.S162
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1/* kernel atomic64 operations
2 *
3 * For an explanation of how atomic ops work in this arch, see:
4 * Documentation/frv/atomic-ops.txt
5 *
6 * Copyright (C) 2009 Red Hat, Inc. All Rights Reserved.
7 * Written by David Howells (dhowells@redhat.com)
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15#include <asm/spr-regs.h>
16
17 .text
18 .balign 4
19
20
21###############################################################################
22#
23# long long atomic64_inc_return(atomic64_t *v)
24#
25###############################################################################
26 .globl atomic64_inc_return
27 .type atomic64_inc_return,@function
28atomic64_inc_return:
29 or.p gr8,gr8,gr10
300:
31 orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
32 ckeq icc3,cc7
33 ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
34 orcr cc7,cc7,cc3 /* set CC3 to true */
35 addicc gr9,#1,gr9,icc0
36 addxi gr8,#0,gr8,icc0
37 cstd.p gr8,@(gr10,gr0) ,cc3,#1
38 corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
39 beq icc3,#0,0b
40 bralr
41
42 .size atomic64_inc_return, .-atomic64_inc_return
43
44###############################################################################
45#
46# long long atomic64_dec_return(atomic64_t *v)
47#
48###############################################################################
49 .globl atomic64_dec_return
50 .type atomic64_dec_return,@function
51atomic64_dec_return:
52 or.p gr8,gr8,gr10
530:
54 orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
55 ckeq icc3,cc7
56 ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
57 orcr cc7,cc7,cc3 /* set CC3 to true */
58 subicc gr9,#1,gr9,icc0
59 subxi gr8,#0,gr8,icc0
60 cstd.p gr8,@(gr10,gr0) ,cc3,#1
61 corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
62 beq icc3,#0,0b
63 bralr
64
65 .size atomic64_dec_return, .-atomic64_dec_return
66
67###############################################################################
68#
69# long long atomic64_add_return(long long i, atomic64_t *v)
70#
71###############################################################################
72 .globl atomic64_add_return
73 .type atomic64_add_return,@function
74atomic64_add_return:
75 or.p gr8,gr8,gr4
76 or gr9,gr9,gr5
770:
78 orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
79 ckeq icc3,cc7
80 ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
81 orcr cc7,cc7,cc3 /* set CC3 to true */
82 addcc gr9,gr5,gr9,icc0
83 addx gr8,gr4,gr8,icc0
84 cstd.p gr8,@(gr10,gr0) ,cc3,#1
85 corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
86 beq icc3,#0,0b
87 bralr
88
89 .size atomic64_add_return, .-atomic64_add_return
90
91###############################################################################
92#
93# long long atomic64_sub_return(long long i, atomic64_t *v)
94#
95###############################################################################
96 .globl atomic64_sub_return
97 .type atomic64_sub_return,@function
98atomic64_sub_return:
99 or.p gr8,gr8,gr4
100 or gr9,gr9,gr5
1010:
102 orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
103 ckeq icc3,cc7
104 ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
105 orcr cc7,cc7,cc3 /* set CC3 to true */
106 subcc gr9,gr5,gr9,icc0
107 subx gr8,gr4,gr8,icc0
108 cstd.p gr8,@(gr10,gr0) ,cc3,#1
109 corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
110 beq icc3,#0,0b
111 bralr
112
113 .size atomic64_sub_return, .-atomic64_sub_return
114
115###############################################################################
116#
117# uint64_t __xchg_64(uint64_t i, uint64_t *v)
118#
119###############################################################################
120 .globl __xchg_64
121 .type __xchg_64,@function
122__xchg_64:
123 or.p gr8,gr8,gr4
124 or gr9,gr9,gr5
1250:
126 orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
127 ckeq icc3,cc7
128 ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
129 orcr cc7,cc7,cc3 /* set CC3 to true */
130 cstd.p gr4,@(gr10,gr0) ,cc3,#1
131 corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
132 beq icc3,#0,0b
133 bralr
134
135 .size __xchg_64, .-__xchg_64
136
137###############################################################################
138#
139# uint64_t __cmpxchg_64(uint64_t test, uint64_t new, uint64_t *v)
140#
141###############################################################################
142 .globl __cmpxchg_64
143 .type __cmpxchg_64,@function
144__cmpxchg_64:
145 or.p gr8,gr8,gr4
146 or gr9,gr9,gr5
1470:
148 orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
149 ckeq icc3,cc7
150 ldd.p @(gr12,gr0),gr8 /* LDD.P/ORCR must be atomic */
151 orcr cc7,cc7,cc3
152 subcc gr8,gr4,gr0,icc0
153 subcc.p gr9,gr5,gr0,icc1
154 bnelr icc0,#0
155 bnelr icc1,#0
156 cstd.p gr10,@(gr12,gr0) ,cc3,#1
157 corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
158 beq icc3,#0,0b
159 bralr
160
161 .size __cmpxchg_64, .-__cmpxchg_64
162
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