| /* Store register values as _Unwind_Word type in DWARF2 EH unwind context. |
| Copyright (C) 2023-2024 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/>. */ |
| |
| /* Return the value of the VLENB register. This should only be |
| called if we know this is an vector extension enabled RISC-V host. */ |
| static inline long |
| riscv_vlenb (void) |
| { |
| register long vlenb asm ("a0"); |
| /* 0xc2202573 == csrr a0, 0xc22 */ |
| asm (".insn 0xc2202573" : "=r"(vlenb)); |
| return vlenb; |
| } |
| |
| /* Lazily provide a value for VLENB, so that we don't try to execute RVV |
| instructions unless we know they're needed. */ |
| #define DWARF_LAZY_REGISTER_VALUE(REGNO, VALUE) \ |
| ((REGNO) == RISCV_DWARF_VLENB && ((*VALUE) = riscv_vlenb (), 1)) |
