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1.1 ! root 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, 51 Franklin St, Fifth Floor, Boston, ! 20: MA 02110-1301, USA. */ ! 21: ! 22: #include "libgcc.h" ! 23: ! 24: #define BITS_PER_UNIT 8 ! 25: #define DI_TYPE_SIZE 64 ! 26: ! 27: #define __BITS4 (DI_TYPE_SIZE / 4) ! 28: #define __ll_B (1L << (DI_TYPE_SIZE / 2)) ! 29: #define __ll_lowpart(t) ((UDItype) (t) % __ll_B) ! 30: #define __ll_highpart(t) ((UDItype) (t) / __ll_B) ! 31: ! 32: #define umul_ppmm(w1, w0, u, v) \ ! 33: do { \ ! 34: UDItype __x0, __x1, __x2, __x3; \ ! 35: UDItype __ul, __vl, __uh, __vh; \ ! 36: \ ! 37: __ul = __ll_lowpart (u); \ ! 38: __uh = __ll_highpart (u); \ ! 39: __vl = __ll_lowpart (v); \ ! 40: __vh = __ll_highpart (v); \ ! 41: \ ! 42: __x0 = (UDItype) __ul * __vl; \ ! 43: __x1 = (UDItype) __ul * __vh; \ ! 44: __x2 = (UDItype) __uh * __vl; \ ! 45: __x3 = (UDItype) __uh * __vh; \ ! 46: \ ! 47: __x1 += __ll_highpart (__x0);/* this can't give carry */ \ ! 48: __x1 += __x2; /* but this indeed can */ \ ! 49: if (__x1 < __x2) /* did we get it? */ \ ! 50: __x3 += __ll_B; /* yes, add it in the proper pos. */ \ ! 51: \ ! 52: (w1) = __x3 + __ll_highpart (__x1); \ ! 53: (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0); \ ! 54: } while (0) ! 55: ! 56: #define __umulsidi3(u, v) \ ! 57: ({TIunion __w; \ ! 58: umul_ppmm (__w.s.high, __w.s.low, u, v); \ ! 59: __w.ll; }) ! 60: ! 61: struct TIstruct {DItype high, low;}; ! 62: ! 63: typedef union ! 64: { ! 65: struct TIstruct s; ! 66: TItype ll; ! 67: } TIunion; ! 68: ! 69: TItype ! 70: __multi3 (TItype u, TItype v) ! 71: { ! 72: TIunion w; ! 73: TIunion uu, vv; ! 74: ! 75: uu.ll = u, ! 76: vv.ll = v; ! 77: ! 78: w.ll = __umulsidi3 (uu.s.low, vv.s.low); ! 79: w.s.high += ((UDItype) uu.s.low * (UDItype) vv.s.high ! 80: + (UDItype) uu.s.high * (UDItype) vv.s.low); ! 81: ! 82: return w.ll; ! 83: }
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