| /* PowerPC support code for fibers and multithreading. |
| Copyright (C) 2019-2020 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "../common/threadasm.S" |
| |
| #if !defined(__PPC64__) |
| |
| /** |
| * Performs a context switch. |
| * |
| * r3 - old context pointer |
| * r4 - new context pointer |
| * |
| */ |
| .text |
| .globl CSYM(fiber_switchContext) |
| .type CSYM(fiber_switchContext), @function |
| .align 2 |
| CSYM(fiber_switchContext): |
| .cfi_startproc |
| /* Save linkage area */ |
| mflr 0 |
| mfcr 5 |
| stw 0, 8(1) |
| stw 5, 4(1) |
| |
| /* Save GPRs */ |
| stw 11, (-1 * 4)(1) |
| stw 13, (-2 * 4)(1) |
| stw 14, (-3 * 4)(1) |
| stw 15, (-4 * 4)(1) |
| stw 16, (-5 * 4)(1) |
| stw 17, (-6 * 4)(1) |
| stw 18, (-7 * 4)(1) |
| stw 19, (-8 * 4)(1) |
| stw 20, (-9 * 4)(1) |
| stw 21, (-10 * 4)(1) |
| stw 22, (-11 * 4)(1) |
| stw 23, (-12 * 4)(1) |
| stw 24, (-13 * 4)(1) |
| stw 25, (-14 * 4)(1) |
| stw 26, (-15 * 4)(1) |
| stw 27, (-16 * 4)(1) |
| stw 28, (-17 * 4)(1) |
| stw 29, (-18 * 4)(1) |
| stw 30, (-19 * 4)(1) |
| stwu 31, (-20 * 4)(1) |
| |
| /* We update the stack pointer here, since we do not want the GC to |
| scan the floating point registers. */ |
| |
| /* Save FPRs */ |
| stfd 14, (-1 * 8)(1) |
| stfd 15, (-2 * 8)(1) |
| stfd 16, (-3 * 8)(1) |
| stfd 17, (-4 * 8)(1) |
| stfd 18, (-5 * 8)(1) |
| stfd 19, (-6 * 8)(1) |
| stfd 20, (-7 * 8)(1) |
| stfd 21, (-8 * 8)(1) |
| stfd 22, (-9 * 8)(1) |
| stfd 23, (-10 * 8)(1) |
| stfd 24, (-11 * 8)(1) |
| stfd 25, (-12 * 8)(1) |
| stfd 26, (-13 * 8)(1) |
| stfd 27, (-14 * 8)(1) |
| stfd 28, (-15 * 8)(1) |
| stfd 29, (-16 * 8)(1) |
| stfd 30, (-17 * 8)(1) |
| stfd 31, (-18 * 8)(1) |
| |
| /* Update the old stack pointer */ |
| stw 1, 0(3) |
| |
| /* Set new stack pointer */ |
| addi 1, 4, 20 * 4 |
| |
| /* Restore linkage area */ |
| lwz 0, 8(1) |
| lwz 5, 4(1) |
| |
| /* Restore GPRs */ |
| lwz 11, (-1 * 4)(1) |
| lwz 13, (-2 * 4)(1) |
| lwz 14, (-3 * 4)(1) |
| lwz 15, (-4 * 4)(1) |
| lwz 16, (-5 * 4)(1) |
| lwz 17, (-6 * 4)(1) |
| lwz 18, (-7 * 4)(1) |
| lwz 19, (-8 * 4)(1) |
| lwz 20, (-9 * 4)(1) |
| lwz 21, (-10 * 4)(1) |
| lwz 22, (-11 * 4)(1) |
| lwz 23, (-12 * 4)(1) |
| lwz 24, (-13 * 4)(1) |
| lwz 25, (-14 * 4)(1) |
| lwz 26, (-15 * 4)(1) |
| lwz 27, (-16 * 4)(1) |
| lwz 28, (-17 * 4)(1) |
| lwz 29, (-18 * 4)(1) |
| lwz 30, (-19 * 4)(1) |
| lwz 31, (-20 * 4)(1) |
| |
| /* Restore FPRs */ |
| lfd 14, (-1 * 8)(4) |
| lfd 15, (-2 * 8)(4) |
| lfd 16, (-3 * 8)(4) |
| lfd 17, (-4 * 8)(4) |
| lfd 18, (-5 * 8)(4) |
| lfd 19, (-6 * 8)(4) |
| lfd 20, (-7 * 8)(4) |
| lfd 21, (-8 * 8)(4) |
| lfd 22, (-9 * 8)(4) |
| lfd 23, (-10 * 8)(4) |
| lfd 24, (-11 * 8)(4) |
| lfd 25, (-12 * 8)(4) |
| lfd 26, (-13 * 8)(4) |
| lfd 27, (-14 * 8)(4) |
| lfd 28, (-15 * 8)(4) |
| lfd 29, (-16 * 8)(4) |
| lfd 30, (-17 * 8)(4) |
| lfd 31, (-18 * 8)(4) |
| |
| /* Set condition and link register */ |
| mtcr 5 |
| mtlr 0 |
| |
| /* Return and switch context */ |
| blr |
| .cfi_endproc |
| .size CSYM(fiber_switchContext),.-CSYM(fiber_switchContext) |
| |
| #endif /* !defined(__PPC64__) */ |
