projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| a945c346 | 1 | /* Copyright (C) 2022-2024 Free Software Foundation, Inc. |
| a3b58f28 XT |
2 | Contributed by Xiongchuan Tan <xc-tan@outlook.com>. |
| 3 | ||
| 4 | This file is part of the GNU Transactional Memory Library (libitm). | |
| 5 | ||
| 6 | Libitm is free software; you can redistribute it and/or modify it | |
| 7 | under the terms of the GNU General Public License as published by | |
| 8 | the Free Software Foundation; either version 3 of the License, or | |
| 9 | (at your option) any later version. | |
| 10 | ||
| 11 | Libitm is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
| 13 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 14 | more details. | |
| 15 | ||
| 16 | Under Section 7 of GPL version 3, you are granted additional | |
| 17 | permissions described in the GCC Runtime Library Exception, version | |
| 18 | 3.1, as published by the Free Software Foundation. | |
| 19 | ||
| 20 | You should have received a copy of the GNU General Public License and | |
| 21 | a copy of the GCC Runtime Library Exception along with this program; | |
| 22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 23 | <http://www.gnu.org/licenses/>. */ | |
| 24 | ||
| 25 | namespace GTM HIDDEN { | |
| 26 | ||
| 27 | typedef struct gtm_jmpbuf | |
| 28 | { | |
| 29 | long int pc; | |
| 30 | void *cfa; | |
| 31 | long int s[12]; /* Saved registers, s0 is fp */ | |
| 32 | ||
| 33 | #if __riscv_xlen == 32 | |
| 34 | /* Ensure that the stack is 16-byte aligned */ | |
| 35 | long int padding[2]; | |
| 36 | #endif | |
| 37 | ||
| 38 | /* FP saved registers */ | |
| 39 | #if defined(__riscv_flen) && __riscv_flen == 64 | |
| 40 | double fs[12]; | |
| 41 | #elif defined(__riscv_flen) && __riscv_flen == 32 | |
| 42 | float fs[12]; | |
| 43 | #elif defined(__riscv_flen) | |
| 44 | # error Q-extension unsupported | |
| 45 | #endif | |
| 46 | } gtm_jmpbuf; | |
| 47 | ||
| 48 | /* The size of one line in hardware caches (in bytes). */ | |
| 49 | /* 64 bytes is a suggested value in the RVA profiles (see | |
| 50 | https://github.com/riscv/riscv-profiles/blob/main/profiles.adoc). */ | |
| 51 | #define HW_CACHELINE_SIZE 64 | |
| 52 | ||
| 53 | static inline void | |
| 54 | cpu_relax (void) | |
| 55 | { | |
| 56 | #ifdef __riscv_zihintpause | |
| 57 | __asm volatile ("pause"); | |
| 58 | #else | |
| 59 | /* Encoding of the pause instruction */ | |
| 60 | __asm volatile (".4byte 0x100000F"); | |
| 61 | #endif | |
| 62 | } | |
| 63 | ||
| 64 | } // namespace GTM |