aos/lib/compiler-rt/builtins/riscv/mulsi3.S
Daniel Schwyn 6d444bf552 Main handout
Signed-off-by: Daniel Schwyn <daniel.schwyn@inf.ethz.ch>
2022-03-03 14:57:51 +01:00

28 lines
639 B
ArmAsm

//===--- mulsi3.S - Integer multiplication routines routines ---===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#if !defined(__riscv_mul) && __riscv_xlen == 32
.text
.align 2
.globl __mulsi3
.type __mulsi3, @function
__mulsi3:
mv a2, a0
mv a0, zero
.L1:
andi a3, a1, 1
beqz a3, .L2
add a0, a0, a2
.L2:
srli a1, a1, 1
slli a2, a2, 1
bnez a1, .L1
ret
#endif