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581c785b | 1 | /* Copyright (C) 2003-2022 Free Software Foundation, Inc. |
d5efd131 MF |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
75efb018 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
d5efd131 | 17 | |
d5efd131 MF |
18 | #include <ia64intrin.h> |
19 | ||
1ea339b6 TR |
20 | #define __HAVE_64B_ATOMICS 1 |
21 | #define USE_ATOMIC_COMPILER_BUILTINS 0 | |
22 | ||
12d2dd70 SL |
23 | /* XXX Is this actually correct? */ |
24 | #define ATOMIC_EXCHANGE_USES_CAS 0 | |
25 | ||
d5efd131 MF |
26 | |
27 | #define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \ | |
28 | (abort (), 0) | |
29 | ||
30 | #define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \ | |
31 | (abort (), 0) | |
32 | ||
33 | #define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \ | |
34 | (!__sync_bool_compare_and_swap ((mem), (int) (long) (oldval), \ | |
35 | (int) (long) (newval))) | |
36 | ||
37 | #define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \ | |
38 | (!__sync_bool_compare_and_swap ((mem), (long) (oldval), \ | |
39 | (long) (newval))) | |
40 | ||
41 | #define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \ | |
42 | (abort (), (__typeof (*mem)) 0) | |
43 | ||
44 | #define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \ | |
45 | (abort (), (__typeof (*mem)) 0) | |
46 | ||
47 | #define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ | |
48 | __sync_val_compare_and_swap ((mem), (int) (long) (oldval), \ | |
49 | (int) (long) (newval)) | |
50 | ||
51 | #define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ | |
52 | __sync_val_compare_and_swap ((mem), (long) (oldval), (long) (newval)) | |
53 | ||
54 | /* Atomically store newval and return the old value. */ | |
55 | #define atomic_exchange_acq(mem, value) \ | |
56 | __sync_lock_test_and_set (mem, value) | |
57 | ||
58 | #define atomic_exchange_rel(mem, value) \ | |
59 | (__sync_synchronize (), __sync_lock_test_and_set (mem, value)) | |
60 | ||
61 | #define atomic_exchange_and_add(mem, value) \ | |
cf31a2c7 | 62 | __sync_fetch_and_add ((mem), (value)) |
d5efd131 MF |
63 | |
64 | #define atomic_decrement_if_positive(mem) \ | |
65 | ({ __typeof (*mem) __oldval, __val; \ | |
66 | __typeof (mem) __memp = (mem); \ | |
67 | \ | |
68 | __val = (*__memp); \ | |
69 | do \ | |
70 | { \ | |
71 | __oldval = __val; \ | |
72 | if (__builtin_expect (__val <= 0, 0)) \ | |
73 | break; \ | |
74 | __val = atomic_compare_and_exchange_val_acq (__memp, __oldval - 1, \ | |
75 | __oldval); \ | |
76 | } \ | |
77 | while (__builtin_expect (__val != __oldval, 0)); \ | |
78 | __oldval; }) | |
79 | ||
80 | #define atomic_bit_test_set(mem, bit) \ | |
81 | ({ __typeof (*mem) __oldval, __val; \ | |
82 | __typeof (mem) __memp = (mem); \ | |
83 | __typeof (*mem) __mask = ((__typeof (*mem)) 1 << (bit)); \ | |
84 | \ | |
85 | __val = (*__memp); \ | |
86 | do \ | |
87 | { \ | |
88 | __oldval = __val; \ | |
89 | __val = atomic_compare_and_exchange_val_acq (__memp, \ | |
90 | __oldval | __mask, \ | |
91 | __oldval); \ | |
92 | } \ | |
93 | while (__builtin_expect (__val != __oldval, 0)); \ | |
94 | __oldval & __mask; }) | |
95 | ||
96 | #define atomic_full_barrier() __sync_synchronize () |