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 | |
25 | ENTRY(__muldi3) |
26 | ENTRY(__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 | |
44 | ENDPROC(__muldi3) |
45 | ENDPROC(__aeabi_lmul) |
46 | |