summaryrefslogtreecommitdiff
path: root/lib/builtins/riscv/mulsi3.S
blob: 5464919b26b9f21e375c15a1cd1f90f18e00c3f6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
//===--- 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