1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2023 Sean Anderson <sean.anderson@seco.com>
4 *
5 * ARM bitops to call when using THUMB1, which doesn't have these instructions.
6 */
7#include <linux/linkage.h>
8#include <asm/assembler.h>
9
10.pushsection .text.__fls
11ENTRY(__fls)
12	clz	r0, r0
13	rsb	r0, r0, #31
14	ret	lr
15ENDPROC(__fls)
16.popsection
17
18.pushsection .text.__ffs
19ENTRY(__ffs)
20	rsb	r3, r0, #0
21	and	r0, r0, r3
22	clz	r0, r0
23	rsb	r0, r0, #31
24	ret	lr
25ENDPROC(__ffs)
26.popsection
27
28.pushsection .text.fls
29ENTRY(fls)
30	cmp	r0, #0
31	clzne	r0, r0
32	rsbne	r0, r0, #32
33	ret	lr
34ENDPROC(fls)
35.popsection
36
37.pushsection .text.ffs
38ENTRY(ffs)
39	rsb	r3, r0, #0
40	and	r0, r0, r3
41	clz	r0, r0
42	rsb	r0, r0, #32
43	ret	lr
44ENDPROC(ffs)
45.popsection
46