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 24 #define umul_ppmm(w1, w0, u, v) \ 25 __asm__ ("mulu%.l %3,%1:%0" \ 26 : "=d" ((USItype)(w0)), \ 27 "=d" ((USItype)(w1)) \ 28 : "%0" ((USItype)(u)), \ 29 "dmi" ((USItype)(v))) 30 31 #define __umulsidi3(u, v) \ 32 ({DIunion __w; \ 33 umul_ppmm (__w.s.high, __w.s.low, u, v); \ 34 __w.ll; }) 35 36 typedef int SItype __attribute__ ((mode (SI))); 37 typedef unsigned int USItype __attribute__ ((mode (SI))); 38 typedef int DItype __attribute__ ((mode (DI))); 39 typedef int word_type __attribute__ ((mode (__word__))); 40 41 struct DIstruct {SItype high, low;}; 42 43 typedef union 44 { 45 struct DIstruct s; 46 DItype ll; 47 } DIunion; 48 49 DItype 50 __muldi3 (DItype u, DItype v) 51 { 52 DIunion w; 53 DIunion uu, vv; 54 55 uu.ll = u, 56 vv.ll = v; 57 58 w.ll = __umulsidi3 (uu.s.low, vv.s.low); 59 w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high 60 + (USItype) uu.s.high * (USItype) vv.s.low); 61 62 return w.ll; 63 } 64