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Diffstat (limited to 'kernel/arch/sh/lib/udivsi3.S')
| -rw-r--r-- | kernel/arch/sh/lib/udivsi3.S | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/kernel/arch/sh/lib/udivsi3.S b/kernel/arch/sh/lib/udivsi3.S new file mode 100644 index 000000000..72157ab5c --- /dev/null +++ b/kernel/arch/sh/lib/udivsi3.S @@ -0,0 +1,87 @@ +/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 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. */ + +!! libgcc routines for the Renesas / SuperH SH CPUs. +!! Contributed by Steve Chamberlain. +!! sac@cygnus.com + + .balign 4 + .global __udivsi3 + .type __udivsi3, @function +div8: + div1 r5,r4 +div7: + div1 r5,r4; div1 r5,r4; div1 r5,r4 + div1 r5,r4; div1 r5,r4; div1 r5,r4; rts; div1 r5,r4 + +divx4: + div1 r5,r4; rotcl r0 + div1 r5,r4; rotcl r0 + div1 r5,r4; rotcl r0 + rts; div1 r5,r4 + +__udivsi3: + sts.l pr,@-r15 + extu.w r5,r0 + cmp/eq r5,r0 + bf/s large_divisor + div0u + swap.w r4,r0 + shlr16 r4 + bsr div8 + shll16 r5 + bsr div7 + div1 r5,r4 + xtrct r4,r0 + xtrct r0,r4 + bsr div8 + swap.w r4,r4 + bsr div7 + div1 r5,r4 + lds.l @r15+,pr + xtrct r4,r0 + swap.w r0,r0 + rotcl r0 + rts + shlr16 r5 + +large_divisor: + mov #0,r0 + xtrct r4,r0 + xtrct r0,r4 + bsr divx4 + rotcl r0 + bsr divx4 + rotcl r0 + bsr divx4 + rotcl r0 + bsr divx4 + rotcl r0 + lds.l @r15+,pr + rts + rotcl r0 |