projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 2493e718 | 1 | /* MIPS support code for fibers and multithreading. |
| 99dee823 | 2 | Copyright (C) 2019-2021 Free Software Foundation, Inc. |
| 2493e718 IB |
3 | |
| 4 | This file is part of GCC. | |
| 5 | ||
| 6 | GCC is free software; you can redistribute it and/or modify it under | |
| 7 | the terms of the GNU General Public License as published by the Free | |
| 8 | Software Foundation; either version 3, or (at your option) any later | |
| 9 | version. | |
| 10 | ||
| 11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | for 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 | #include "../common/threadasm.S" | |
| 26 | ||
| 27 | #if _MIPS_SIM == _ABIO32 | |
| 28 | ||
| 29 | /** | |
| 30 | * Performs a context switch. | |
| 31 | * | |
| 32 | * $a0 - void** - ptr to old stack pointer | |
| 33 | * $a1 - void* - new stack pointer | |
| 34 | * | |
| 35 | */ | |
| 36 | .text | |
| 37 | .globl fiber_switchContext | |
| 38 | .align 2 | |
| 39 | .ent fiber_switchContext,0 | |
| 40 | fiber_switchContext: | |
| 41 | .cfi_startproc | |
| 42 | addiu $sp, $sp, -(10 * 4) | |
| 43 | ||
| 44 | // fp regs and return address are stored below the stack | |
| 45 | // because we don't want the GC to scan them. | |
| 46 | ||
| 47 | #ifdef __mips_hard_float | |
| 48 | #define ALIGN8(val) (val + (-val & 7)) | |
| 49 | #define BELOW (ALIGN8(6 * 8 + 4)) | |
| 6f0a4ae1 MR |
50 | s.d $f20, (0 * 8 - BELOW)($sp) |
| 51 | s.d $f22, (1 * 8 - BELOW)($sp) | |
| 52 | s.d $f24, (2 * 8 - BELOW)($sp) | |
| 53 | s.d $f26, (3 * 8 - BELOW)($sp) | |
| 54 | s.d $f28, (4 * 8 - BELOW)($sp) | |
| 55 | s.d $f30, (5 * 8 - BELOW)($sp) | |
| 2493e718 IB |
56 | #endif |
| 57 | sw $ra, -4($sp) | |
| 58 | ||
| 59 | sw $s0, (0 * 4)($sp) | |
| 60 | sw $s1, (1 * 4)($sp) | |
| 61 | sw $s2, (2 * 4)($sp) | |
| 62 | sw $s3, (3 * 4)($sp) | |
| 63 | sw $s4, (4 * 4)($sp) | |
| 64 | sw $s5, (5 * 4)($sp) | |
| 65 | sw $s6, (6 * 4)($sp) | |
| 66 | sw $s7, (7 * 4)($sp) | |
| 67 | sw $s8, (8 * 4)($sp) | |
| 68 | sw $gp, (9 * 4)($sp) | |
| 69 | ||
| 70 | // swap stack pointer | |
| 71 | sw $sp, 0($a0) | |
| 72 | move $sp, $a1 | |
| 73 | ||
| 74 | #ifdef __mips_hard_float | |
| 6f0a4ae1 MR |
75 | l.d $f20, (0 * 8 - BELOW)($sp) |
| 76 | l.d $f22, (1 * 8 - BELOW)($sp) | |
| 77 | l.d $f24, (2 * 8 - BELOW)($sp) | |
| 78 | l.d $f26, (3 * 8 - BELOW)($sp) | |
| 79 | l.d $f28, (4 * 8 - BELOW)($sp) | |
| 80 | l.d $f30, (5 * 8 - BELOW)($sp) | |
| 2493e718 IB |
81 | #endif |
| 82 | lw $ra, -4($sp) | |
| 83 | ||
| 84 | lw $s0, (0 * 4)($sp) | |
| 85 | lw $s1, (1 * 4)($sp) | |
| 86 | lw $s2, (2 * 4)($sp) | |
| 87 | lw $s3, (3 * 4)($sp) | |
| 88 | lw $s4, (4 * 4)($sp) | |
| 89 | lw $s5, (5 * 4)($sp) | |
| 90 | lw $s6, (6 * 4)($sp) | |
| 91 | lw $s7, (7 * 4)($sp) | |
| 92 | lw $s8, (8 * 4)($sp) | |
| 93 | lw $gp, (9 * 4)($sp) | |
| 94 | ||
| 95 | addiu $sp, $sp, (10 * 4) | |
| 96 | ||
| 97 | jr $ra // return | |
| 98 | .cfi_endproc | |
| 99 | .end fiber_switchContext | |
| 100 | .size fiber_switchContext,.-fiber_switchContext | |
| 101 | ||
| 102 | #endif |