/* __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
