| Robin Getz | 96f1050 | 2009-09-24 14:11:24 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2007 Analog Devices Inc. |
| 3 | * |
| Sonic Zhang | de45083 | 2012-05-17 14:45:27 +0800 | [diff] [blame] | 4 | * Licensed under the Clear BSD license or the GPL-2 (or later) |
| Robin Getz | 96f1050 | 2009-09-24 14:11:24 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 7 | .align 2 |
| 8 | .global ___umulsi3_highpart; |
| 9 | .type ___umulsi3_highpart, STT_FUNC; |
| 10 | |
| 11 | #ifdef CONFIG_ARITHMETIC_OPS_L1 |
| 12 | .section .l1.text |
| 13 | #else |
| 14 | .text |
| 15 | #endif |
| 16 | |
| 17 | ___umulsi3_highpart: |
| 18 | R2 = R1.H * R0.H, R3 = R1.L * R0.H (FU); |
| 19 | R0 = R1.L * R0.L, R1 = R1.H * R0.L (FU); |
| 20 | R0 >>= 16; |
| 21 | /* Unsigned multiplication has the nice property that we can |
| 22 | ignore carry on this first addition. */ |
| 23 | R0 = R0 + R3; |
| 24 | R0 = R0 + R1; |
| 25 | cc = ac0; |
| 26 | R1 = cc; |
| 27 | R1 = PACK(R1.l,R0.h); |
| 28 | R0 = R1 + R2; |
| 29 | RTS; |
| Mike Frysinger | 51be24c | 2007-06-11 15:31:30 +0800 | [diff] [blame] | 30 | |
| 31 | .size ___umulsi3_highpart, .-___umulsi3_highpart |