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