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arm: add _lshrdi3.S

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Signed-off-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Heiko Schocher 2009-07-23 13:27:04 +02:00 committed by Wolfgang Denk
parent 52b1bf2c5c
commit deec15b306
2 changed files with 47 additions and 0 deletions
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1
lib_arm/Makefile
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@ -29,6 +29,7 @@ LIBGCC = $(obj)libgcc.a
GLSOBJS += _ashldi3.o
GLSOBJS += _ashrdi3.o
GLSOBJS += _divsi3.o
GLSOBJS += _lshrdi3.o
GLSOBJS += _modsi3.o
GLSOBJS += _udivsi3.o
GLSOBJS += _umodsi3.o

46
lib_arm/_lshrdi3.S Normal file
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@ -0,0 +1,46 @@
/* Copyright 1995, 1996, 1998, 1999, 2000, 2003, 2004, 2005
Free Software Foundation, Inc.
This file 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, or (at your option) any
later version.
In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
compiled version of this file into combinations with other programs,
and to distribute those combinations without any restriction coming
from the use of this file. (The General Public License restrictions
do apply in other respects; for example, they cover modification of
the file, and distribution when not linked into a combine
executable.)
This file is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#ifdef __ARMEB__
#define al r1
#define ah r0
#else
#define al r0
#define ah r1
#endif
.globl __lshrdi3
__lshrdi3:
subs r3, r2, #32
rsb ip, r2, #32
movmi al, al, lsr r2
movpl al, ah, lsr r3
orrmi al, al, ah, lsl ip
mov ah, ah, lsr r2
mov pc, lr