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.
5 This file is part of GNU CC.
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)
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.
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. */
22 #define BITS_PER_UNIT 8
23 #define SI_TYPE_SIZE 32
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)
30 #define umul_ppmm(w1, w0, u, v) \
32 USItype __x0, __x1, __x2, __x3; \
33 USItype __ul, __vl, __uh, __vh; \
35 __ul = __ll_lowpart (u); \
36 __uh = __ll_highpart (u); \
37 __vl = __ll_lowpart (v); \
38 __vh = __ll_highpart (v); \
40 __x0 = (USItype) __ul * __vl; \
41 __x1 = (USItype) __ul * __vh; \
42 __x2 = (USItype) __uh * __vl; \
43 __x3 = (USItype) __uh * __vh; \
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. */ \
50 (w1) = __x3 + __ll_highpart (__x1); \
51 (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0); \
54 #define __umulsidi3(u, v) \
56 umul_ppmm (__w.s.high, __w.s.low, u, v); \
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__
)));
64 struct DIstruct
{SItype high
, low
;};
73 __muldi3 (DItype u
, DItype v
)
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
);
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