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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 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 BITS_PER_UNIT 8 |
23 | #define SI_TYPE_SIZE 32 |
24 | |
25 | #define __BITS4 (SI_TYPE_SIZE / 4) |
26 | #define __ll_B (1L << (SI_TYPE_SIZE / 2)) |
27 | #define __ll_lowpart(t) ((USItype) (t) % __ll_B) |
28 | #define __ll_highpart(t) ((USItype) (t) / __ll_B) |
29 | |
30 | #define umul_ppmm(w1, w0, u, v) \ |
31 | do { \ |
32 | USItype __x0, __x1, __x2, __x3; \ |
33 | USItype __ul, __vl, __uh, __vh; \ |
34 | \ |
35 | __ul = __ll_lowpart (u); \ |
36 | __uh = __ll_highpart (u); \ |
37 | __vl = __ll_lowpart (v); \ |
38 | __vh = __ll_highpart (v); \ |
39 | \ |
40 | __x0 = (USItype) __ul * __vl; \ |
41 | __x1 = (USItype) __ul * __vh; \ |
42 | __x2 = (USItype) __uh * __vl; \ |
43 | __x3 = (USItype) __uh * __vh; \ |
44 | \ |
45 | __x1 += __ll_highpart (__x0);/* this can't give carry */ \ |
46 | __x1 += __x2; /* but this indeed can */ \ |
47 | if (__x1 < __x2) /* did we get it? */ \ |
48 | __x3 += __ll_B; /* yes, add it in the proper pos. */ \ |
49 | \ |
50 | (w1) = __x3 + __ll_highpart (__x1); \ |
51 | (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0); \ |
52 | } while (0) |
53 | |
54 | #define __umulsidi3(u, v) \ |
55 | ({DIunion __w; \ |
56 | umul_ppmm (__w.s.high, __w.s.low, u, v); \ |
57 | __w.ll; }) |
58 | |
59 | typedef int SItype __attribute__ ((mode (SI))); |
60 | typedef unsigned int USItype __attribute__ ((mode (SI))); |
61 | typedef int DItype __attribute__ ((mode (DI))); |
62 | typedef int word_type __attribute__ ((mode (__word__))); |
63 | |
64 | struct DIstruct {SItype high, low;}; |
65 | |
66 | typedef union |
67 | { |
68 | struct DIstruct s; |
69 | DItype ll; |
70 | } DIunion; |
71 | |
72 | DItype |
73 | __muldi3 (DItype u, DItype v) |
74 | { |
75 | DIunion w; |
76 | DIunion uu, vv; |
77 | |
78 | uu.ll = u, |
79 | vv.ll = v; |
80 | |
81 | w.ll = __umulsidi3 (uu.s.low, vv.s.low); |
82 | w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high |
83 | + (USItype) uu.s.high * (USItype) vv.s.low); |
84 | |
85 | return w.ll; |
86 | } |
87 |
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od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9