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/arch/v850/lib/muldi3.c

https://bitbucket.org/evzijst/gittest
C | 61 lines | 32 code | 9 blank | 20 comment | 0 complexity | 18e614b19df8585f8d33a37007f10f1c MD5 | raw file
 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}