projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 0a9d1b3b | 1 | /* Atomic operations. sparcv9 version. |
| 04277e02 | 2 | Copyright (C) 2003-2019 Free Software Foundation, Inc. |
| 0a9d1b3b RM |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Lesser General Public | |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | Lesser General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 0a9d1b3b RM |
19 | |
| 20 | #include <stdint.h> | |
| 21 | ||
| 22 | typedef int8_t atomic8_t; | |
| 23 | typedef uint8_t uatomic8_t; | |
| 24 | typedef int_fast8_t atomic_fast8_t; | |
| 25 | typedef uint_fast8_t uatomic_fast8_t; | |
| 26 | ||
| 27 | typedef int16_t atomic16_t; | |
| 28 | typedef uint16_t uatomic16_t; | |
| 29 | typedef int_fast16_t atomic_fast16_t; | |
| 30 | typedef uint_fast16_t uatomic_fast16_t; | |
| 31 | ||
| 32 | typedef int32_t atomic32_t; | |
| 33 | typedef uint32_t uatomic32_t; | |
| 34 | typedef int_fast32_t atomic_fast32_t; | |
| 35 | typedef uint_fast32_t uatomic_fast32_t; | |
| 36 | ||
| 37 | typedef int64_t atomic64_t; | |
| 38 | typedef uint64_t uatomic64_t; | |
| 39 | typedef int_fast64_t atomic_fast64_t; | |
| 40 | typedef uint_fast64_t uatomic_fast64_t; | |
| 41 | ||
| 42 | typedef intptr_t atomicptr_t; | |
| 43 | typedef uintptr_t uatomicptr_t; | |
| 44 | typedef intmax_t atomic_max_t; | |
| 45 | typedef uintmax_t uatomic_max_t; | |
| 46 | ||
| 1ea339b6 TR |
47 | #define __HAVE_64B_ATOMICS 0 |
| 48 | #define USE_ATOMIC_COMPILER_BUILTINS 0 | |
| 49 | ||
| 12d2dd70 SL |
50 | /* XXX Is this actually correct? */ |
| 51 | #define ATOMIC_EXCHANGE_USES_CAS 0 | |
| 52 | ||
| 0a9d1b3b RM |
53 | |
| 54 | #define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \ | |
| 4661a153 | 55 | (abort (), (__typeof (*mem)) 0) |
| 0a9d1b3b RM |
56 | |
| 57 | #define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \ | |
| 4661a153 | 58 | (abort (), (__typeof (*mem)) 0) |
| 0a9d1b3b RM |
59 | |
| 60 | #define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ | |
| 61 | ({ \ | |
| 62 | __typeof (*(mem)) __acev_tmp; \ | |
| 63 | __typeof (mem) __acev_mem = (mem); \ | |
| bae8e7f5 DM |
64 | if (__builtin_constant_p (oldval) && (oldval) == 0) \ |
| 65 | __asm __volatile ("cas [%3], %%g0, %0" \ | |
| 66 | : "=r" (__acev_tmp), "=m" (*__acev_mem) \ | |
| 67 | : "m" (*__acev_mem), "r" (__acev_mem), \ | |
| 68 | "0" (newval) : "memory"); \ | |
| 69 | else \ | |
| 70 | __asm __volatile ("cas [%4], %2, %0" \ | |
| 71 | : "=r" (__acev_tmp), "=m" (*__acev_mem) \ | |
| 72 | : "r" (oldval), "m" (*__acev_mem), "r" (__acev_mem), \ | |
| 73 | "0" (newval) : "memory"); \ | |
| 0a9d1b3b RM |
74 | __acev_tmp; }) |
| 75 | ||
| 76 | /* This can be implemented if needed. */ | |
| 77 | #define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ | |
| 4661a153 | 78 | (abort (), (__typeof (*mem)) 0) |
| 0a9d1b3b | 79 | |
| 949ec764 | 80 | #define atomic_exchange_acq(mem, newvalue) \ |
| 0a9d1b3b RM |
81 | ({ __typeof (*(mem)) __oldval; \ |
| 82 | __typeof (mem) __memp = (mem); \ | |
| 83 | __typeof (*(mem)) __value = (newvalue); \ | |
| 84 | \ | |
| 85 | if (sizeof (*(mem)) == 4) \ | |
| 86 | __asm ("swap %0, %1" \ | |
| 87 | : "=m" (*__memp), "=r" (__oldval) \ | |
| c8e82b4a | 88 | : "m" (*__memp), "1" (__value) : "memory"); \ |
| 0a9d1b3b RM |
89 | else \ |
| 90 | abort (); \ | |
| 91 | __oldval; }) | |
| 92 | ||
| b01fe5f7 UD |
93 | #define atomic_compare_and_exchange_val_24_acq(mem, newval, oldval) \ |
| 94 | atomic_compare_and_exchange_val_acq (mem, newval, oldval) | |
| 95 | ||
| 96 | #define atomic_exchange_24_rel(mem, newval) \ | |
| 97 | atomic_exchange_rel (mem, newval) | |
| 98 | ||
| 0a9d1b3b RM |
99 | #define atomic_full_barrier() \ |
| 100 | __asm __volatile ("membar #LoadLoad | #LoadStore" \ | |
| 101 | " | #StoreLoad | #StoreStore" : : : "memory") | |
| 102 | #define atomic_read_barrier() \ | |
| 103 | __asm __volatile ("membar #LoadLoad | #LoadStore" : : : "memory") | |
| 104 | #define atomic_write_barrier() \ | |
| ff9dbdc0 | 105 | __asm __volatile ("membar #LoadStore | #StoreStore" : : : "memory") |
| 4eb984d3 TR |
106 | |
| 107 | extern void __cpu_relax (void); | |
| c59f721c | 108 | #define atomic_spin_nop() __cpu_relax () |