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83d290c5 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0bf65c64 MV |
2 | /* |
3 | * linux/arch/arm/lib/muldi3.S | |
4 | * | |
5 | * Author: Nicolas Pitre | |
6 | * Created: Oct 19, 2005 | |
7 | * Copyright: Monta Vista Software, Inc. | |
0bf65c64 MV |
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 | ||
b2f18584 | 25 | .pushsection .text.__muldi3, "ax" |
0bf65c64 MV |
26 | ENTRY(__muldi3) |
27 | ENTRY(__aeabi_lmul) | |
28 | ||
29 | mul xh, yl, xh | |
30 | mla xh, xl, yh, xh | |
31 | mov ip, xl, lsr #16 | |
32 | mov yh, yl, lsr #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 | ret lr | |
44 | ||
45 | ENDPROC(__muldi3) | |
46 | ENDPROC(__aeabi_lmul) | |
b2f18584 | 47 | .popsection |