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)

 1/* SPDX-License-Identifier: GPL-2.0-only */
 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
25ENTRY(__muldi3)
26ENTRY(__aeabi_lmul)
27
28	mul	xh, yl, xh
29	mla	xh, xl, yh, xh
30	mov	ip, xl, lsr #16
31	mov	yh, yl, lsr #16
32	bic	xl, xl, ip, lsl #16
33	bic	yl, yl, yh, lsl #16
34	mla	xh, yh, ip, xh
35	mul	yh, xl, yh
36	mul	xl, yl, xl
37	mul	ip, yl, ip
38	adds	xl, xl, yh, lsl #16
39	adc	xh, xh, yh, lsr #16
40	adds	xl, xl, ip, lsl #16
41	adc	xh, xh, ip, lsr #16
42	ret	lr
43
44ENDPROC(__muldi3)
45ENDPROC(__aeabi_lmul)