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/*
 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#include <asm/assembler.h>
15
16#ifdef __ARMEB__
17#define xh r0
18#define xl r1
19#define yh r2
20#define yl r3
21#else
22#define xl r0
23#define xh r1
24#define yl r2
25#define yh r3
26#endif
27
28ENTRY(__muldi3)
29ENTRY(__aeabi_lmul)
30
31	mul	xh, yl, xh
32	mla	xh, xl, yh, xh
33	mov	ip, xl, lsr #16
34	mov	yh, yl, lsr #16
35	bic	xl, xl, ip, lsl #16
36	bic	yl, yl, yh, lsl #16
37	mla	xh, yh, ip, xh
38	mul	yh, xl, yh
39	mul	xl, yl, xl
40	mul	ip, yl, ip
41	adds	xl, xl, yh, lsl #16
42	adc	xh, xh, yh, lsr #16
43	adds	xl, xl, ip, lsl #16
44	adc	xh, xh, ip, lsr #16
45	ret	lr
46
47ENDPROC(__muldi3)
48ENDPROC(__aeabi_lmul)