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1 | /* __ucmpdi2.S: 64-bit unsigned compare |
2 | * | |
3 | * Copyright (C) 2008 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 | ||
13 | .text | |
14 | .p2align 4 | |
15 | ||
16 | ############################################################################### | |
17 | # | |
18 | # int __ucmpdi2(unsigned long long a [D0:D1], | |
19 | # unsigned long long b [(SP,12),(SP,16)]) | |
20 | # | |
21 | # - returns 0, 1, or 2 as a <, =, > b respectively. | |
22 | # | |
23 | ############################################################################### | |
24 | .globl __ucmpdi2 | |
25 | .type __ucmpdi2,@function | |
26 | __ucmpdi2: | |
27 | mov (12,sp),a0 # b.lsw | |
28 | mov (16,sp),a1 # b.msw | |
29 | ||
30 | sub a0,d0 | |
31 | subc a1,d1 # may clear Z, never sets it | |
32 | bne __ucmpdi2_differ # a.msw != b.msw | |
33 | mov +1,d0 | |
34 | rets | |
35 | ||
36 | __ucmpdi2_differ: | |
37 | # C flag is set if LE, clear if GE | |
38 | subc d0,d0 # -1 if LE, 0 if GE | |
39 | add +1,d0 # 0 if LE, 1 if GE | |
40 | add d0,d0 # 0 if LE, 2 if GE | |
41 | rets | |
42 | ||
43 | .size __ucmpdi2, .-__ucmpdi2 |