| /* This file contains the floating-point save and restore routines. |
| * |
| * Copyright (C) 2004-2021 Free Software Foundation, Inc. |
| * |
| * This file 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. |
| * |
| * This file 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/>. |
| */ |
| |
| /* THE SAVE AND RESTORE ROUTINES CAN HAVE ONLY ONE GLOBALLY VISIBLE |
| ENTRY POINT - callers have to jump to "saveFP+60" to save f29..f31, |
| for example. For FP reg saves/restores, it takes one instruction |
| (4 bytes) to do the operation; for Vector regs, 2 instructions are |
| required (8 bytes.) |
| |
| MORAL: DO NOT MESS AROUND WITH THESE FUNCTIONS! */ |
| |
| #include "darwin-asm.h" |
| |
| .text |
| .align 2 |
| |
| /* saveFP saves R0 -- assumed to be the callers LR -- to 8/16(R1). */ |
| |
| .private_extern saveFP |
| saveFP: |
| stfd f14,-144(r1) |
| stfd f15,-136(r1) |
| stfd f16,-128(r1) |
| stfd f17,-120(r1) |
| stfd f18,-112(r1) |
| stfd f19,-104(r1) |
| stfd f20,-96(r1) |
| stfd f21,-88(r1) |
| stfd f22,-80(r1) |
| stfd f23,-72(r1) |
| stfd f24,-64(r1) |
| stfd f25,-56(r1) |
| stfd f26,-48(r1) |
| stfd f27,-40(r1) |
| stfd f28,-32(r1) |
| stfd f29,-24(r1) |
| stfd f30,-16(r1) |
| stfd f31,-8(r1) |
| stg r0,SAVED_LR_OFFSET(r1) |
| blr |
| |
| /* restFP restores the caller`s LR from 8/16(R1). Note that the code for |
| this starts at the offset of F30 restoration, so calling this |
| routine in an attempt to restore only F31 WILL NOT WORK (it would |
| be a stupid thing to do, anyway.) */ |
| |
| .private_extern restFP |
| restFP: |
| lfd f14,-144(r1) |
| lfd f15,-136(r1) |
| lfd f16,-128(r1) |
| lfd f17,-120(r1) |
| lfd f18,-112(r1) |
| lfd f19,-104(r1) |
| lfd f20,-96(r1) |
| lfd f21,-88(r1) |
| lfd f22,-80(r1) |
| lfd f23,-72(r1) |
| lfd f24,-64(r1) |
| lfd f25,-56(r1) |
| lfd f26,-48(r1) |
| lfd f27,-40(r1) |
| lfd f28,-32(r1) |
| lfd f29,-24(r1) |
| /* <OFFSET OF F30 RESTORE> restore callers LR */ |
| lg r0,SAVED_LR_OFFSET(r1) |
| lfd f30,-16(r1) |
| /* and prepare for return to caller */ |
| mtlr r0 |
| lfd f31,-8(r1) |
| blr |
