| 1 | /* Linux fixed code userspace ABI |
| 2 | |
| 3 | Copyright (C) 2005-2020 Free Software Foundation, Inc. |
| 4 | Contributed by Analog Devices, Inc. |
| 5 | |
| 6 | This file is part of simulators. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | /* For more info, see this page: |
| 22 | http://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:fixed-code */ |
| 23 | |
| 24 | .text |
| 25 | |
| 26 | .align 16 |
| 27 | _sigreturn_stub: |
| 28 | P0 = 173; |
| 29 | EXCPT 0; |
| 30 | 0: JUMP.S 0b; |
| 31 | |
| 32 | .align 16 |
| 33 | _atomic_xchg32: |
| 34 | R0 = [P0]; |
| 35 | [P0] = R1; |
| 36 | rts; |
| 37 | |
| 38 | .align 16 |
| 39 | _atomic_cas32: |
| 40 | R0 = [P0]; |
| 41 | CC = R0 == R1; |
| 42 | IF !CC JUMP 1f; |
| 43 | [P0] = R2; |
| 44 | 1: |
| 45 | rts; |
| 46 | |
| 47 | .align 16 |
| 48 | _atomic_add32: |
| 49 | R1 = [P0]; |
| 50 | R0 = R1 + R0; |
| 51 | [P0] = R0; |
| 52 | rts; |
| 53 | |
| 54 | .align 16 |
| 55 | _atomic_sub32: |
| 56 | R1 = [P0]; |
| 57 | R0 = R1 - R0; |
| 58 | [P0] = R0; |
| 59 | rts; |
| 60 | |
| 61 | .align 16 |
| 62 | _atomic_ior32: |
| 63 | R1 = [P0]; |
| 64 | R0 = R1 | R0; |
| 65 | [P0] = R0; |
| 66 | rts; |
| 67 | |
| 68 | .align 16 |
| 69 | _atomic_and32: |
| 70 | R1 = [P0]; |
| 71 | R0 = R1 & R0; |
| 72 | [P0] = R0; |
| 73 | rts; |
| 74 | |
| 75 | .align 16 |
| 76 | _atomic_xor32: |
| 77 | R1 = [P0]; |
| 78 | R0 = R1 ^ R0; |
| 79 | [P0] = R0; |
| 80 | rts; |
| 81 | |
| 82 | .align 16 |
| 83 | _safe_user_instruction: |
| 84 | NOP; NOP; NOP; NOP; |
| 85 | EXCPT 0x4; |