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- /* __ucmpdi2.S: 64-bit unsigned compare
- *
- * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- .text
- .p2align 4
- ###############################################################################
- #
- # int __ucmpdi2(unsigned long long a [D0:D1],
- # unsigned long long b [(SP,12),(SP,16)])
- #
- # - returns 0, 1, or 2 as a <, =, > b respectively.
- #
- ###############################################################################
- .globl __ucmpdi2
- .type __ucmpdi2,@function
- __ucmpdi2:
- mov (12,sp),a0 # b.lsw
- mov (16,sp),a1 # b.msw
- sub a0,d0
- subc a1,d1 # may clear Z, never sets it
- bne __ucmpdi2_differ # a.msw != b.msw
- mov +1,d0
- rets
- __ucmpdi2_differ:
- # C flag is set if LE, clear if GE
- subc d0,d0 # -1 if LE, 0 if GE
- add +1,d0 # 0 if LE, 1 if GE
- add d0,d0 # 0 if LE, 2 if GE
- rets
- .size __ucmpdi2, .-__ucmpdi2
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