64 строки
1.8 KiB
C
64 строки
1.8 KiB
C
|
/* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and
|
||
|
|
gcc-2.7.2.3/longlong.h which is: */
|
||
|
|
/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
This file is part of GNU CC.
|
||
|
|
|
||
|
|
GNU CC is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2, or (at your option)
|
||
|
|
any later version.
|
||
|
|
|
||
|
|
GNU CC is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with GNU CC; see the file COPYING. If not, write to
|
||
|
|
the Free Software Foundation, 59 Temple Place - Suite 330,
|
||
|
|
Boston, MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
#define BITS_PER_UNIT 8
|
||
|
|
|
||
|
|
#define umul_ppmm(w1, w0, u, v) \
|
||
|
|
__asm__ ("mulu%.l %3,%1:%0" \
|
||
|
|
: "=d" ((USItype)(w0)), \
|
||
|
|
"=d" ((USItype)(w1)) \
|
||
|
|
: "%0" ((USItype)(u)), \
|
||
|
|
"dmi" ((USItype)(v)))
|
||
|
|
|
||
|
|
#define __umulsidi3(u, v) \
|
||
|
|
({DIunion __w; \
|
||
|
|
umul_ppmm (__w.s.high, __w.s.low, u, v); \
|
||
|
|
__w.ll; })
|
||
|
|
|
||
|
|
typedef int SItype __attribute__ ((mode (SI)));
|
||
|
|
typedef unsigned int USItype __attribute__ ((mode (SI)));
|
||
|
|
typedef int DItype __attribute__ ((mode (DI)));
|
||
|
|
typedef int word_type __attribute__ ((mode (__word__)));
|
||
|
|
|
||
|
|
struct DIstruct {SItype high, low;};
|
||
|
|
|
||
|
|
typedef union
|
||
|
|
{
|
||
|
|
struct DIstruct s;
|
||
|
|
DItype ll;
|
||
|
|
} DIunion;
|
||
|
|
|
||
|
|
DItype
|
||
|
|
__muldi3 (DItype u, DItype v)
|
||
|
|
{
|
||
|
|
DIunion w;
|
||
|
|
DIunion uu, vv;
|
||
|
|
|
||
|
|
uu.ll = u,
|
||
|
|
vv.ll = v;
|
||
|
|
|
||
|
|
w.ll = __umulsidi3 (uu.s.low, vv.s.low);
|
||
|
|
w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high
|
||
|
|
+ (USItype) uu.s.high * (USItype) vv.s.low);
|
||
|
|
|
||
|
|
return w.ll;
|
||
|
|
}
|