| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2003-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <stdint.h> |
| 20 | |
| 21 | typedef int8_t atomic8_t; |
| 22 | typedef uint8_t uatomic8_t; |
| 23 | typedef int_fast8_t atomic_fast8_t; |
| 24 | typedef uint_fast8_t uatomic_fast8_t; |
| 25 | |
| 26 | typedef int16_t atomic16_t; |
| 27 | typedef uint16_t uatomic16_t; |
| 28 | typedef int_fast16_t atomic_fast16_t; |
| 29 | typedef uint_fast16_t uatomic_fast16_t; |
| 30 | |
| 31 | typedef int32_t atomic32_t; |
| 32 | typedef uint32_t uatomic32_t; |
| 33 | typedef int_fast32_t atomic_fast32_t; |
| 34 | typedef uint_fast32_t uatomic_fast32_t; |
| 35 | |
| 36 | typedef int64_t atomic64_t; |
| 37 | typedef uint64_t uatomic64_t; |
| 38 | typedef int_fast64_t atomic_fast64_t; |
| 39 | typedef uint_fast64_t uatomic_fast64_t; |
| 40 | |
| 41 | typedef intptr_t atomicptr_t; |
| 42 | typedef uintptr_t uatomicptr_t; |
| 43 | typedef intmax_t atomic_max_t; |
| 44 | typedef uintmax_t uatomic_max_t; |
| 45 | |
| 46 | #define USE_ATOMIC_COMPILER_BUILTINS 0 |
| 47 | |
| 48 | |
| 49 | #define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \ |
| 50 | (abort (), (__typeof (*mem)) 0) |
| 51 | |
| 52 | #define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \ |
| 53 | (abort (), (__typeof (*mem)) 0) |
| 54 | |
| 55 | #define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ |
| 56 | ({ __typeof (mem) __archmem = (mem); \ |
| 57 | __typeof (*mem) __archold = (oldval); \ |
| 58 | __asm__ __volatile__ ("cs %0,%2,%1" \ |
| 59 | : "+d" (__archold), "=Q" (*__archmem) \ |
| 60 | : "d" (newval), "m" (*__archmem) : "cc", "memory" ); \ |
| 61 | __archold; }) |
| 62 | |
| 63 | #ifdef __s390x__ |
| 64 | # define __HAVE_64B_ATOMICS 1 |
| 65 | # define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ |
| 66 | ({ __typeof (mem) __archmem = (mem); \ |
| 67 | __typeof (*mem) __archold = (oldval); \ |
| 68 | __asm__ __volatile__ ("csg %0,%2,%1" \ |
| 69 | : "+d" (__archold), "=Q" (*__archmem) \ |
| 70 | : "d" ((long) (newval)), "m" (*__archmem) : "cc", "memory" ); \ |
| 71 | __archold; }) |
| 72 | #else |
| 73 | # define __HAVE_64B_ATOMICS 0 |
| 74 | /* For 31 bit we do not really need 64-bit compare-and-exchange. We can |
| 75 | implement them by use of the csd instruction. The straightforward |
| 76 | implementation causes warnings so we skip the definition for now. */ |
| 77 | # define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ |
| 78 | (abort (), (__typeof (*mem)) 0) |
| 79 | #endif |
| 80 | |
| 81 | /* Store NEWVALUE in *MEM and return the old value. */ |
| 82 | /* On s390, the atomic_exchange_acq is different from generic implementation, |
| 83 | because the generic one does not use the condition-code of cs-instruction |
| 84 | to determine if looping is needed. Instead it saves the old-value and |
| 85 | compares it against old-value returned by cs-instruction. */ |
| 86 | #ifdef __s390x__ |
| 87 | # define atomic_exchange_acq(mem, newvalue) \ |
| 88 | ({ __typeof (mem) __atg5_memp = (mem); \ |
| 89 | __typeof (*(mem)) __atg5_oldval = *__atg5_memp; \ |
| 90 | __typeof (*(mem)) __atg5_value = (newvalue); \ |
| 91 | if (sizeof (*mem) == 4) \ |
| 92 | __asm__ __volatile__ ("0: cs %0,%2,%1\n" \ |
| 93 | " jl 0b" \ |
| 94 | : "+d" (__atg5_oldval), "=Q" (*__atg5_memp) \ |
| 95 | : "d" (__atg5_value), "m" (*__atg5_memp) \ |
| 96 | : "cc", "memory" ); \ |
| 97 | else if (sizeof (*mem) == 8) \ |
| 98 | __asm__ __volatile__ ("0: csg %0,%2,%1\n" \ |
| 99 | " jl 0b" \ |
| 100 | : "+d" ( __atg5_oldval), "=Q" (*__atg5_memp) \ |
| 101 | : "d" ((long) __atg5_value), "m" (*__atg5_memp) \ |
| 102 | : "cc", "memory" ); \ |
| 103 | else \ |
| 104 | abort (); \ |
| 105 | __atg5_oldval; }) |
| 106 | #else |
| 107 | # define atomic_exchange_acq(mem, newvalue) \ |
| 108 | ({ __typeof (mem) __atg5_memp = (mem); \ |
| 109 | __typeof (*(mem)) __atg5_oldval = *__atg5_memp; \ |
| 110 | __typeof (*(mem)) __atg5_value = (newvalue); \ |
| 111 | if (sizeof (*mem) == 4) \ |
| 112 | __asm__ __volatile__ ("0: cs %0,%2,%1\n" \ |
| 113 | " jl 0b" \ |
| 114 | : "+d" (__atg5_oldval), "=Q" (*__atg5_memp) \ |
| 115 | : "d" (__atg5_value), "m" (*__atg5_memp) \ |
| 116 | : "cc", "memory" ); \ |
| 117 | else \ |
| 118 | abort (); \ |
| 119 | __atg5_oldval; }) |
| 120 | #endif |