Merge branch 'for-3.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
[zen-stable.git] / arch / blackfin / lib / umulsi3_highpart.S
blob051824a6ed00b583005dc954fdd72d8c46d106e9
1 /*
2  * Copyright 2007 Analog Devices Inc.
3  *
4  * Licensed under the ADI BSD license or the GPL-2 (or later)
5  */
7 .align 2
8 .global ___umulsi3_highpart;
9 .type ___umulsi3_highpart, STT_FUNC;
11 #ifdef CONFIG_ARITHMETIC_OPS_L1
12 .section .l1.text
13 #else
14 .text
15 #endif
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;
31 .size ___umulsi3_highpart, .-___umulsi3_highpart