diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68k/lib/ashrdi3.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m68k/lib/ashrdi3.c')
-rw-r--r-- | arch/m68k/lib/ashrdi3.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/m68k/lib/ashrdi3.c b/arch/m68k/lib/ashrdi3.c new file mode 100644 index 000000000000..18ea5f7ed921 --- /dev/null +++ b/arch/m68k/lib/ashrdi3.c | |||
@@ -0,0 +1,63 @@ | |||
1 | /* ashrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */ | ||
2 | /* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. | ||
3 | |||
4 | This file is part of GNU CC. | ||
5 | |||
6 | GNU CC is free software; you can redistribute it and/or modify | ||
7 | it under the terms of the GNU General Public License as published by | ||
8 | the Free Software Foundation; either version 2, or (at your option) | ||
9 | any later version. | ||
10 | |||
11 | GNU CC is distributed in the hope that it will be useful, | ||
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | GNU General Public License for more details. | ||
15 | |||
16 | You should have received a copy of the GNU General Public License | ||
17 | along with GNU CC; see the file COPYING. If not, write to | ||
18 | the Free Software Foundation, 59 Temple Place - Suite 330, | ||
19 | Boston, MA 02111-1307, USA. */ | ||
20 | |||
21 | #define BITS_PER_UNIT 8 | ||
22 | |||
23 | typedef int SItype __attribute__ ((mode (SI))); | ||
24 | typedef unsigned int USItype __attribute__ ((mode (SI))); | ||
25 | typedef int DItype __attribute__ ((mode (DI))); | ||
26 | typedef int word_type __attribute__ ((mode (__word__))); | ||
27 | |||
28 | struct DIstruct {SItype high, low;}; | ||
29 | |||
30 | typedef union | ||
31 | { | ||
32 | struct DIstruct s; | ||
33 | DItype ll; | ||
34 | } DIunion; | ||
35 | |||
36 | DItype | ||
37 | __ashrdi3 (DItype u, word_type b) | ||
38 | { | ||
39 | DIunion w; | ||
40 | word_type bm; | ||
41 | DIunion uu; | ||
42 | |||
43 | if (b == 0) | ||
44 | return u; | ||
45 | |||
46 | uu.ll = u; | ||
47 | |||
48 | bm = (sizeof (SItype) * BITS_PER_UNIT) - b; | ||
49 | if (bm <= 0) | ||
50 | { | ||
51 | /* w.s.high = 1..1 or 0..0 */ | ||
52 | w.s.high = uu.s.high >> (sizeof (SItype) * BITS_PER_UNIT - 1); | ||
53 | w.s.low = uu.s.high >> -bm; | ||
54 | } | ||
55 | else | ||
56 | { | ||
57 | USItype carries = (USItype)uu.s.high << bm; | ||
58 | w.s.high = uu.s.high >> b; | ||
59 | w.s.low = ((USItype)uu.s.low >> b) | carries; | ||
60 | } | ||
61 | |||
62 | return w.ll; | ||
63 | } | ||