1 /* __ucmpdi2.S: 64-bit unsigned compare
3 * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
16 ###############################################################################
18 # int __ucmpdi2(unsigned long long a [D0:D1],
19 # unsigned long long b [(SP,12),(SP,16)])
21 # - returns 0, 1, or 2 as a <, =, > b respectively.
23 ###############################################################################
25 .type __ucmpdi2,@function
27 mov (12,sp),a0 # b.lsw
28 mov (16,sp),a1 # b.msw
31 subc a1,d1 # may clear Z, never sets it
32 bne __ucmpdi2_differ # a.msw != b.msw
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
43 .size __ucmpdi2, .-__ucmpdi2