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1da177e4 LT |
1 | /* __ashldi3.S: 64-bit arithmetic shift left |
2 | * | |
3 | * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | .text | |
13 | .p2align 4 | |
14 | ||
15 | ############################################################################### | |
16 | # | |
17 | # unsigned long long __ashldi3(unsigned long long value [GR8:GR9], unsigned by [GR10]) | |
18 | # | |
19 | ############################################################################### | |
20 | .globl __ashldi3 | |
21 | .type __ashldi3,@function | |
22 | __ashldi3: | |
23 | andicc.p gr10,#63,gr10,icc0 | |
24 | setlos #32,gr5 | |
25 | andicc.p gr10,#32,gr0,icc1 | |
26 | beqlr icc0,#0 | |
27 | ckeq icc1,cc4 ; cc4 is true if 0<N<32 | |
28 | ||
29 | # deal with a shift in the range 1<=N<=31 | |
30 | csll.p gr8,gr10,gr8 ,cc4,#1 ; MSW <<= N | |
31 | csub gr5,gr10,gr5 ,cc4,#1 ; M = 32 - N | |
32 | csrl.p gr9,gr5,gr4 ,cc4,#1 | |
33 | csll gr9,gr10,gr9 ,cc4,#1 ; LSW <<= N | |
34 | cor.p gr4,gr8,gr8 ,cc4,#1 ; MSW |= LSW >> M | |
35 | ||
36 | # deal with a shift in the range 32<=N<=63 | |
37 | csll gr9,gr10,gr8 ,cc4,#0 ; MSW = LSW << (N & 31 [implicit AND]) | |
38 | cor.p gr0,gr0,gr9 ,cc4,#0 ; LSW = 0 | |
39 | bralr | |
40 | .size __ashldi3, .-__ashldi3 |