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43 lines
1.2 KiB
43 lines
1.2 KiB
/* __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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