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1da177e4 LT |
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 | ||
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, 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 | ||
34 | typedef int SItype __attribute__ ((mode (SI))); | |
35 | typedef unsigned int USItype __attribute__ ((mode (SI))); | |
36 | typedef int DItype __attribute__ ((mode (DI))); | |
37 | typedef int word_type __attribute__ ((mode (__word__))); | |
38 | ||
39 | struct DIstruct {SItype high, low;}; | |
40 | ||
41 | typedef union | |
42 | { | |
43 | struct DIstruct s; | |
44 | DItype ll; | |
45 | } DIunion; | |
46 | ||
47 | DItype | |
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 | } |