projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 0bd99911 PD |
1 | /* Integer multiplication routines for RISC-V. |
| 2 | ||
| a5544970 | 3 | Copyright (C) 2016-2019 Free Software Foundation, Inc. |
| 0bd99911 PD |
4 | |
| 5 | This file is part of GCC. | |
| 6 | ||
| 7 | GCC is free software; you can redistribute it and/or modify it under | |
| 8 | the terms of the GNU General Public License as published by the Free | |
| 9 | Software Foundation; either version 3, or (at your option) any later | |
| 10 | version. | |
| 11 | ||
| 12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 | for more details. | |
| 16 | ||
| 17 | Under Section 7 of GPL version 3, you are granted additional | |
| 18 | permissions described in the GCC Runtime Library Exception, version | |
| 19 | 3.1, as published by the Free Software Foundation. | |
| 20 | ||
| 21 | You should have received a copy of the GNU General Public License and | |
| 22 | a copy of the GCC Runtime Library Exception along with this program; | |
| 23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 24 | <http://www.gnu.org/licenses/>. */ | |
| 25 | ||
| 3a4c600f JW |
26 | #include "riscv-asm.h" |
| 27 | ||
| 0bd99911 PD |
28 | .text |
| 29 | .align 2 | |
| 30 | ||
| 31 | #if __riscv_xlen == 32 | |
| 32 | /* Our RV64 64-bit routine is equivalent to our RV32 32-bit routine. */ | |
| 33 | # define __muldi3 __mulsi3 | |
| 34 | #endif | |
| 35 | ||
| 3a4c600f | 36 | FUNC_BEGIN (__muldi3) |
| 0bd99911 PD |
37 | mv a2, a0 |
| 38 | li a0, 0 | |
| 39 | .L1: | |
| 40 | andi a3, a1, 1 | |
| 41 | beqz a3, .L2 | |
| 42 | add a0, a0, a2 | |
| 43 | .L2: | |
| 44 | srli a1, a1, 1 | |
| 45 | slli a2, a2, 1 | |
| 46 | bnez a1, .L1 | |
| 47 | ret | |
| 3a4c600f | 48 | FUNC_END (__muldi3) |