aboutsummaryrefslogtreecommitdiffstats
path: root/arch/v850/lib/muldi3.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/v850/lib/muldi3.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/v850/lib/muldi3.c')
-rw-r--r--arch/v850/lib/muldi3.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/v850/lib/muldi3.c b/arch/v850/lib/muldi3.c
new file mode 100644
index 000000000000..277ca25c82c8
--- /dev/null
+++ b/arch/v850/lib/muldi3.c
@@ -0,0 +1,61 @@
1/* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and
2 gcc-2.7.2.3/longlong.h which is: */
3/* Copyright (C) 1989, 1992, 1993, 1994, 1995, 2001 Free Software Foundation, Inc.
4
5This file is part of GNU CC.
6
7GNU CC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU CC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU CC; see the file COPYING. If not, write to
19the Free Software Foundation, 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA. */
21
22#define umul_ppmm(w1, w0, u, v) \
23 __asm__ ("mulu %3, %0, %1" \
24 : "=r" ((USItype)(w0)), \
25 "=r" ((USItype)(w1)) \
26 : "%0" ((USItype)(u)), \
27 "r" ((USItype)(v)))
28
29#define __umulsidi3(u, v) \
30 ({DIunion __w; \
31 umul_ppmm (__w.s.high, __w.s.low, u, v); \
32 __w.ll; })
33
34typedef int SItype __attribute__ ((mode (SI)));
35typedef unsigned int USItype __attribute__ ((mode (SI)));
36typedef int DItype __attribute__ ((mode (DI)));
37typedef int word_type __attribute__ ((mode (__word__)));
38
39struct DIstruct {SItype high, low;};
40
41typedef union
42{
43 struct DIstruct s;
44 DItype ll;
45} DIunion;
46
47DItype
48__muldi3 (DItype u, DItype v)
49{
50 DIunion w;
51 DIunion uu, vv;
52
53 uu.ll = u,
54 vv.ll = v;
55
56 w.ll = __umulsidi3 (uu.s.low, vv.s.low);
57 w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high
58 + (USItype) uu.s.high * (USItype) vv.s.low);
59
60 return w.ll;
61}