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f741a1aa NP |
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 | ||
27 | ENTRY(__muldi3) | |
28 | ||
29 | mul xh, yl, xh | |
30 | mla xh, xl, yh, xh | |
31 | mov ip, xl, asr #16 | |
32 | mov yh, yl, asr #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 | mov pc, lr | |
44 |