82 lines
2.2 KiB
ArmAsm
82 lines
2.2 KiB
ArmAsm
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/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
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2004, 2005, 2006
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Free Software Foundation, Inc.
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This file is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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executable.)
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This file is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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!! libgcc routines for the Renesas / SuperH SH CPUs.
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!! Contributed by Steve Chamberlain.
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!! sac@cygnus.com
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!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
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!! recoded in assembly by Toshiyasu Morita
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!! tm@netcom.com
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/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
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ELF local label prefixes by J"orn Rennecke
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amylaar@cygnus.com */
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/* r0: rn r1: qn */ /* r0: n1 r4: n0 r5: d r6: d1 */ /* r2: __m */
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/* n1 < d, but n1 might be larger than d1. */
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.global __udiv_qrnnd_16
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.balign 8
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__udiv_qrnnd_16:
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div0u
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cmp/hi r6,r0
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bt .Lots
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.rept 16
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div1 r6,r0
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.endr
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extu.w r0,r1
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bt 0f
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add r6,r0
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0: rotcl r1
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mulu.w r1,r5
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xtrct r4,r0
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swap.w r0,r0
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sts macl,r2
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cmp/hs r2,r0
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sub r2,r0
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bt 0f
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addc r5,r0
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add #-1,r1
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bt 0f
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1: add #-1,r1
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rts
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add r5,r0
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.balign 8
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.Lots:
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sub r5,r0
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swap.w r4,r1
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xtrct r0,r1
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clrt
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mov r1,r0
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addc r5,r0
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mov #-1,r1
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bf/s 1b
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shlr16 r1
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0: rts
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nop
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