1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 *  linux/arch/arm/lib/muldi3.S
4 *
5 *  Author:     Nicolas Pitre
6 *  Created:    Oct 19, 2005
7 *  Copyright:  Monta Vista Software, Inc.
8 */
9
10#include <linux/linkage.h>
11#include <asm/assembler.h>
12
13#ifdef __ARMEB__
14#define xh r0
15#define xl r1
16#define yh r2
17#define yl r3
18#else
19#define xl r0
20#define xh r1
21#define yl r2
22#define yh r3
23#endif
24
25.pushsection .text.__muldi3, "ax"
26ENTRY(__muldi3)
27ENTRY(__aeabi_lmul)
28
29	mul	xh, yl, xh
30	mla	xh, xl, yh, xh
31	mov	ip, xl, lsr #16
32	mov	yh, yl, lsr #16
33	bic	xl, xl, ip, lsl #16
34	bic	yl, yl, yh, lsl #16
35	mla	xh, yh, ip, xh
36	mul	yh, xl, yh
37	mul	xl, yl, xl
38	mul	ip, yl, ip
39	adds	xl, xl, yh, lsl #16
40	adc	xh, xh, yh, lsr #16
41	adds	xl, xl, ip, lsl #16
42	adc	xh, xh, ip, lsr #16
43	ret	lr
44
45ENDPROC(__muldi3)
46ENDPROC(__aeabi_lmul)
47.popsection
48