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1 /*-
2  * Copyright (c) 2007 Marcel Moolenaar
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  *
26  * $FreeBSD$
27  */
28
29 #include <machine/asm.h>
30
31         .text
32
33 /*
34  * uint32_t atomic_cas_32(volatile uint32_t *p, uint32_t cmp, uint32_t v)
35  */
36 ENTRY(atomic_cas_32, 3)
37         mov             ar.ccv = r33
38         ;;
39         cmpxchg4.acq    r8 = [r32], r34, ar.ccv
40         ;;
41         br.ret.sptk     rp
42 END(atomic_cas_32)
43
44 /*
45  * uint64_t atomic_cas_64(volatile uint64_t *p, uint64_t cmp, uint64_t v)
46  */
47 ENTRY(atomic_cas_64, 3)
48         mov             ar.ccv = r33
49         ;;
50         cmpxchg8.acq    r8 = [r32], r34, ar.ccv
51         ;;
52         br.ret.sptk     rp
53 END(atomic_cas_64)
54
55 /*
56  * uint64_t atomic_add_64_nv(volatile uint64_t *p, uint64_t v)
57  */
58 ENTRY(atomic_add_64_nv, 2)
59 1:
60         ld8             r16 = [r32]
61         ;;
62         mov             ar.ccv = r16
63         add             r8 = r16, r33
64         ;;
65         cmpxchg8.acq    r17 = [r32], r8, ar.ccv
66         ;;
67         cmp.eq          p6, p7 = r16, r17
68 (p6)    br.ret.sptk     rp
69 (p7)    br.cond.spnt    1b
70 END(atomic_add_64_nv)
71
72 /*
73  * uint8_t atomic_or_8_nv(volatile uint8_t *p, uint8_t v)
74  */
75 ENTRY(atomic_or_8_nv, 2)
76 1:
77         ld8             r16 = [r32]
78         ;;
79         mov             ar.ccv = r16
80         or              r8 = r16, r33
81         ;;
82         cmpxchg1.acq    r17 = [r32], r8, ar.ccv
83         ;;
84         cmp.eq          p6, p7 = r16, r17
85 (p6)    br.ret.sptk     rp
86 (p7)    br.cond.spnt    1b
87 END(atomic_or_8_nv)
88
89 ENTRY(membar_producer, 0)
90         mf
91         ;;
92         br.ret.sptk     rp
93 END(membar_producer)