projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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) | |
| ba95e4e4 | 28 | ENTRY(__aeabi_lmul) |
| f741a1aa NP |
29 | |
| 30 | mul xh, yl, xh | |
| 31 | mla xh, xl, yh, xh | |
| 3c8fdae7 RK |
32 | mov ip, xl, lsr #16 |
| 33 | mov yh, yl, lsr #16 | |
| f741a1aa NP |
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 |