1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
| /* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
| 2004, 2005, 2006
| 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
|
| !! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
| !! recoded in assembly by Toshiyasu Morita
| !! tm@netcom.com
|
| /* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
| ELF local label prefixes by J"orn Rennecke
| amylaar@cygnus.com */
|
| /* r0: rn r1: qn */ /* r0: n1 r4: n0 r5: d r6: d1 */ /* r2: __m */
| /* n1 < d, but n1 might be larger than d1. */
| .global __udiv_qrnnd_16
| .balign 8
| __udiv_qrnnd_16:
| div0u
| cmp/hi r6,r0
| bt .Lots
| .rept 16
| div1 r6,r0
| .endr
| extu.w r0,r1
| bt 0f
| add r6,r0
| 0: rotcl r1
| mulu.w r1,r5
| xtrct r4,r0
| swap.w r0,r0
| sts macl,r2
| cmp/hs r2,r0
| sub r2,r0
| bt 0f
| addc r5,r0
| add #-1,r1
| bt 0f
| 1: add #-1,r1
| rts
| add r5,r0
| .balign 8
| .Lots:
| sub r5,r0
| swap.w r4,r1
| xtrct r0,r1
| clrt
| mov r1,r0
| addc r5,r0
| mov #-1,r1
| bf/s 1b
| shlr16 r1
| 0: rts
| nop
|
|
