/* | |
* Copyright 2007 Analog Devices Inc. | |
* | |
* Licensed under the ADI BSD license or the GPL-2 (or later) | |
*/ | |
.align 2 | |
.global ___umulsi3_highpart; | |
.type ___umulsi3_highpart, STT_FUNC; | |
#ifdef CONFIG_ARITHMETIC_OPS_L1 | |
.section .l1.text | |
#else | |
.text | |
#endif | |
___umulsi3_highpart: | |
R2 = R1.H * R0.H, R3 = R1.L * R0.H (FU); | |
R0 = R1.L * R0.L, R1 = R1.H * R0.L (FU); | |
R0 >>= 16; | |
/* Unsigned multiplication has the nice property that we can | |
ignore carry on this first addition. */ | |
R0 = R0 + R3; | |
R0 = R0 + R1; | |
cc = ac0; | |
R1 = cc; | |
R1 = PACK(R1.l,R0.h); | |
R0 = R1 + R2; | |
RTS; | |
.size ___umulsi3_highpart, .-___umulsi3_highpart |