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3b041227f7
We chan't share code for udivsi3 and udivsi3_i4, because they have a different clobber list. Copy udivsi3 from gcc-4.1.2. As shown in arch/sh/lib/udivsi3.S (and -Os.S), .global __udivsi3_i4i .global __udivsi3_i4 .global __udivsi3 __udivsi3_i4i: ... Three symbols are sharing one code, which is actually udivsi3_i4i. But, this results unwanted code with gcc 4.1. In gcc, these three are treated as pseudo instructions that have their own clobber list apart from the usual calling convention. According to sh's machine description. The clobber list is as follows: - udivsi3_i4i : t,r1,pr,mach,macl - udivsi3_i4 : t,r0,r1,r4,r5,pr,dr0,dr2,dr4 - udivsi3 : t,r4,pr The caller of udivsi3 will be left with a broken r1 and mac*. gcc-4.1.x and older(at least to 3.4) generate udivsi3. ST's gcc-4.1.1 seems to be OK because it has _i4i. Signed-off-by: Takashi YOSHII <yoshii.takashi@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
88 lines
2.1 KiB
ArmAsm
88 lines
2.1 KiB
ArmAsm
/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
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2004, 2005
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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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.balign 4
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.global __udivsi3
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.type __udivsi3, @function
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div8:
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div1 r5,r4
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div7:
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div1 r5,r4; div1 r5,r4; div1 r5,r4
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div1 r5,r4; div1 r5,r4; div1 r5,r4; rts; div1 r5,r4
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divx4:
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div1 r5,r4; rotcl r0
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div1 r5,r4; rotcl r0
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div1 r5,r4; rotcl r0
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rts; div1 r5,r4
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__udivsi3:
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sts.l pr,@-r15
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extu.w r5,r0
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cmp/eq r5,r0
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bf/s large_divisor
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div0u
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swap.w r4,r0
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shlr16 r4
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bsr div8
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shll16 r5
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bsr div7
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div1 r5,r4
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xtrct r4,r0
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xtrct r0,r4
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bsr div8
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swap.w r4,r4
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bsr div7
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div1 r5,r4
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lds.l @r15+,pr
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xtrct r4,r0
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swap.w r0,r0
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rotcl r0
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rts
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shlr16 r5
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large_divisor:
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mov #0,r0
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xtrct r4,r0
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xtrct r0,r4
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bsr divx4
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rotcl r0
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bsr divx4
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rotcl r0
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bsr divx4
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rotcl r0
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bsr divx4
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rotcl r0
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lds.l @r15+,pr
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rts
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rotcl r0
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