diff options
author | Thomas Voss <mail@thomasvoss.com> | 2024-06-21 23:36:36 +0200 |
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committer | Thomas Voss <mail@thomasvoss.com> | 2024-06-21 23:42:26 +0200 |
commit | a89a14ef5da44684a16b204e7a70460cc8c4922a (patch) | |
tree | b23b4c6b155977909ef508fdae2f48d33d802813 /vendor/gmp-6.3.0/mpn/riscv/64/mul_1.asm | |
parent | 1db63fcedab0b288820d66e100b1877b1a5a8851 (diff) |
Basic constant folding implementation
Diffstat (limited to 'vendor/gmp-6.3.0/mpn/riscv/64/mul_1.asm')
-rw-r--r-- | vendor/gmp-6.3.0/mpn/riscv/64/mul_1.asm | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/vendor/gmp-6.3.0/mpn/riscv/64/mul_1.asm b/vendor/gmp-6.3.0/mpn/riscv/64/mul_1.asm new file mode 100644 index 0000000..e35eaa9 --- /dev/null +++ b/vendor/gmp-6.3.0/mpn/riscv/64/mul_1.asm @@ -0,0 +1,58 @@ +dnl RISC-V/64 mpn_mul_1. + +dnl Copyright 2016 Free Software Foundation, Inc. + +dnl This file is part of the GNU MP Library. +dnl +dnl The GNU MP Library is free software; you can redistribute it and/or modify +dnl it under the terms of either: +dnl +dnl * the GNU Lesser General Public License as published by the Free +dnl Software Foundation; either version 3 of the License, or (at your +dnl option) any later version. +dnl +dnl or +dnl +dnl * the GNU General Public License as published by the Free Software +dnl Foundation; either version 2 of the License, or (at your option) any +dnl later version. +dnl +dnl or both in parallel, as here. +dnl +dnl The GNU MP Library is distributed in the hope that it will be useful, but +dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +dnl for more details. +dnl +dnl You should have received copies of the GNU General Public License and the +dnl GNU Lesser General Public License along with the GNU MP Library. If not, +dnl see https://www.gnu.org/licenses/. + +include(`../config.m4') + +C INPUT PARAMETERS +define(`rp', `a0') +define(`up', `a1') +define(`n', `a2') +define(`v0', `a3') + +ASM_START() +PROLOGUE(mpn_mul_1) + li a6, 0 + +L(top): ld a7, 0(up) + addi up, up, 8 C bookkeeping + addi rp, rp, 8 C bookkeeping + mul a5, a7, v0 + addi n, n, -1 C bookkeeping + mulhu a7, a7, v0 + add a6, a5, a6 C cycle 0, 3, ... + sltu a5, a6, a5 C cycle 1, 4, ... + sd a6, -8(rp) + add a6, a7, a5 C cycle 2, 5, ... + bne n, x0, L(top) C bookkeeping + +L(end): mv a0, a6 + ret +EPILOGUE() +ASM_END() |