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mn10300: provide __ucmpdi2() for MN10300

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Provide __ucmpdi2() for MN10300 so that allmodconfig can be built.

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2008-07-04 09:59:47 -07:00 committed by Linus Torvalds
parent 7fc7228c0b
commit fc26361ef0
3 changed files with 46 additions and 1 deletions
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2
arch/mn10300/kernel/mn10300_ksyms.c
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@ -34,7 +34,9 @@ extern u64 __ashrdi3(u64, unsigned);
extern u64 __ashldi3(u64, unsigned);
extern u64 __lshrdi3(u64, unsigned);
extern s64 __negdi2(s64);
extern int __ucmpdi2(u64, u64);
EXPORT_SYMBOL(__ashrdi3);
EXPORT_SYMBOL(__ashldi3);
EXPORT_SYMBOL(__lshrdi3);
EXPORT_SYMBOL(__negdi2);
EXPORT_SYMBOL(__ucmpdi2);

2
arch/mn10300/lib/Makefile
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@ -4,4 +4,4 @@
lib-y = delay.o usercopy.o checksum.o bitops.o memcpy.o memmove.o memset.o
lib-y += do_csum.o
lib-y += __ashldi3.o __ashrdi3.o __lshrdi3.o negdi2.o
lib-y += __ashldi3.o __ashrdi3.o __lshrdi3.o negdi2.o __ucmpdi2.o

43
arch/mn10300/lib/__ucmpdi2.S Normal file
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@ -0,0 +1,43 @@
/* __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