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| 1 | /* Copyright (C) 2003-2022 Free Software Foundation, Inc. |
|---|---|
| 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 |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <https://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <ia64intrin.h> |
| 19 | |
| 20 | #define __HAVE_64B_ATOMICS 1 |
| 21 | #define USE_ATOMIC_COMPILER_BUILTINS 0 |
| 22 | |
| 23 | /* XXX Is this actually correct? */ |
| 24 | #define ATOMIC_EXCHANGE_USES_CAS 0 |
| 25 | |
| 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) \ |
| 62 | __sync_fetch_and_add ((mem), (value)) |
| 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 () |
| 97 |
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