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 #ifdef CONFIG_CPU_HAS_NO_MULDIV64 23 24 #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) 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 #else 55 56 #define umul_ppmm(w1, w0, u, v) \ 57 __asm__ ("mulu%.l %3,%1:%0" \ 58 : "=d" ((USItype)(w0)), \ 59 "=d" ((USItype)(w1)) \ 60 : "%0" ((USItype)(u)), \ 61 "dmi" ((USItype)(v))) 62 63 #endif 64 65 #define __umulsidi3(u, v) \ 66 ({DIunion __w; \ 67 umul_ppmm (__w.s.high, __w.s.low, u, v); \ 68 __w.ll; }) 69 70 typedef int SItype __attribute__ ((mode (SI))); 71 typedef unsigned int USItype __attribute__ ((mode (SI))); 72 typedef int DItype __attribute__ ((mode (DI))); 73 typedef int word_type __attribute__ ((mode (__word__))); 74 75 struct DIstruct {SItype high, low;}; 76 77 typedef union 78 { 79 struct DIstruct s; 80 DItype ll; 81 } DIunion; 82 83 DItype 84 __muldi3 (DItype u, DItype v) 85 { 86 DIunion w; 87 DIunion uu, vv; 88 89 uu.ll = u, 90 vv.ll = v; 91 92 w.ll = __umulsidi3 (uu.s.low, vv.s.low); 93 w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high 94 + (USItype) uu.s.high * (USItype) vv.s.low); 95 96 return w.ll; 97 } 98