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/arch/mn10300/lib/__ucmpdi2.S

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
Assembly | 43 lines | 37 code | 6 blank | 0 comment | 9 complexity | eb621f03309784fddedf965986f58302 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 1/* __ucmpdi2.S: 64-bit unsigned compare
 2 *
 3 * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
 4 * Written by David Howells (dhowells@redhat.com)
 5 *
 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.
10 */
11
12
13        .text
14        .p2align	4
15
16###############################################################################
17#
18# int __ucmpdi2(unsigned long long a [D0:D1],
19#		unsigned long long b [(SP,12),(SP,16)])
20#
21# - returns 0, 1, or 2 as a <, =, > b respectively.
22#
23###############################################################################
24        .globl		__ucmpdi2
25        .type		__ucmpdi2,@function
26__ucmpdi2:
27	mov		(12,sp),a0		# b.lsw
28	mov		(16,sp),a1		# b.msw
29
30	sub		a0,d0
31	subc		a1,d1			# may clear Z, never sets it
32	bne		__ucmpdi2_differ	# a.msw != b.msw
33	mov		+1,d0
34	rets
35
36__ucmpdi2_differ:
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
41	rets
42
43	.size		__ucmpdi2, .-__ucmpdi2