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 #ifdef CONFIG_CPU_HAS_NO_MULDIV64 18 19 #define SI_TYPE_SIZE 32 20 #define __BITS4 (SI_TYPE_SIZE / 4) 21 #define __ll_B (1L << (SI_TYPE_SIZE / 2)) 22 #define __ll_lowpart(t) ((USItype) (t) % __ll_B) 23 #define __ll_highpart(t) ((USItype) (t) / __ll_B) 24 25 #define umul_ppmm(w1, w0, u, v) \ 26 do { \ 27 USItype __x0, __x1, __x2, __x3; \ 28 USItype __ul, __vl, __uh, __vh; \ 29 \ 30 __ul = __ll_lowpart (u); \ 31 __uh = __ll_highpart (u); \ 32 __vl = __ll_lowpart (v); \ 33 __vh = __ll_highpart (v); \ 34 \ 35 __x0 = (USItype) __ul * __vl; \ 36 __x1 = (USItype) __ul * __vh; \ 37 __x2 = (USItype) __uh * __vl; \ 38 __x3 = (USItype) __uh * __vh; \ 39 \ 40 __x1 += __ll_highpart (__x0);/* this can't give carry */ \ 41 __x1 += __x2; /* but this indeed can */ \ 42 if (__x1 < __x2) /* did we get it? */ \ 43 __x3 += __ll_B; /* yes, add it in the proper pos. */ \ 44 \ 45 (w1) = __x3 + __ll_highpart (__x1); \ 46 (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0); \ 47 } while (0) 48 49 #else 50 51 #define umul_ppmm(w1, w0, u, v) \ 52 __asm__ ("mulu%.l %3,%1:%0" \ 53 : "=d" ((USItype)(w0)), \ 54 "=d" ((USItype)(w1)) \ 55 : "%0" ((USItype)(u)), \ 56 "dmi" ((USItype)(v))) 57 58 #endif 59 60 #define __umulsidi3(u, v) \ 61 ({DIunion __w; \ 62 umul_ppmm (__w.s.high, __w.s.low, u, v); \ 63 __w.ll; }) 64 65 typedef int SItype __attribute__ ((mode (SI))); 66 typedef unsigned int USItype __attribute__ ((mode (SI))); 67 typedef int DItype __attribute__ ((mode (DI))); 68 typedef int word_type __attribute__ ((mode (__word__))); 69 70 struct DIstruct {SItype high, low;}; 71 72 typedef union 73 { 74 struct DIstruct s; 75 DItype ll; 76 } DIunion; 77 78 DItype 79 __muldi3 (DItype u, DItype v) 80 { 81 DIunion w; 82 DIunion uu, vv; 83 84 uu.ll = u, 85 vv.ll = v; 86 87 w.ll = __umulsidi3 (uu.s.low, vv.s.low); 88 w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high 89 + (USItype) uu.s.high * (USItype) vv.s.low); 90 91 return w.ll; 92 } 93