1/*
2 *  linux/arch/arm/lib/muldi3.S
3 *
4 *  Author:     Nicolas Pitre
5 *  Created:    Oct 19, 2005
6 *  Copyright:  Monta Vista Software, Inc.
7 *
8 *  This program is free software; you can redistribute it and/or modify
9 *  it under the terms of the GNU General Public License version 2 as
10 *  published by the Free Software Foundation.
11 */
12
13#include <linux/linkage.h>
14
15#ifdef __ARMEB__
16#define xh r0
17#define xl r1
18#define yh r2
19#define yl r3
20#else
21#define xl r0
22#define xh r1
23#define yl r2
24#define yh r3
25#endif
26
27ENTRY(__muldi3)
28ENTRY(__aeabi_lmul)
29
30	mul	xh, yl, xh
31	mla	xh, xl, yh, xh
32	mov	ip, xl, lsr #16
33	mov	yh, yl, lsr #16
34	bic	xl, xl, ip, lsl #16
35	bic	yl, yl, yh, lsl #16
36	mla	xh, yh, ip, xh
37	mul	yh, xl, yh
38	mul	xl, yl, xl
39	mul	ip, yl, ip
40	adds	xl, xl, yh, lsl #16
41	adc	xh, xh, yh, lsr #16
42	adds	xl, xl, ip, lsl #16
43	adc	xh, xh, ip, lsr #16
44	mov	pc, lr
45
46ENDPROC(__muldi3)
47ENDPROC(__aeabi_lmul)
48