/* 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. */ #include #include #include #ifdef CONFIG_CPU_HAS_NO_MULDIV64 #define SI_TYPE_SIZE 32 #define __BITS4 (SI_TYPE_SIZE / 4) #define __ll_B (1L << (SI_TYPE_SIZE / 2)) #define __ll_lowpart(t) ((USItype) (t) % __ll_B) #define __ll_highpart(t) ((USItype) (t) / __ll_B) #define umul_ppmm(w1, w0, u, v) \ do { \ USItype __x0, __x1, __x2, __x3; \ USItype __ul, __vl, __uh, __vh; \ \ __ul = __ll_lowpart (u); \ __uh = __ll_highpart (u); \ __vl = __ll_lowpart (v); \ __vh = __ll_highpart (v); \ \ __x0 = (USItype) __ul * __vl; \ __x1 = (USItype) __ul * __vh; \ __x2 = (USItype) __uh * __vl; \ __x3 = (USItype) __uh * __vh; \ \ __x1 += __ll_highpart (__x0);/* this can't give carry */ \ __x1 += __x2; /* but this indeed can */ \ if (__x1 < __x2) /* did we get it? */ \ __x3 += __ll_B; /* yes, add it in the proper pos. */ \ \ (w1) = __x3 + __ll_highpart (__x1); \ (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0); \ } while (0) #else #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))) #endif #define __umulsidi3(u, v) \ ({DIunion __w; \ umul_ppmm (__w.s.high, __w.s.low, u, v); \ __w.ll; }) typedef int SItype __mode(SI); typedef unsigned int USItype __mode(SI); typedef int DItype __mode(DI); typedef int word_type __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; } EXPORT_SYMBOL(__muldi3);