diff options
Diffstat (limited to 'qemu/roms/openbios/libgcc/multi3.c')
| -rw-r--r-- | qemu/roms/openbios/libgcc/multi3.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/qemu/roms/openbios/libgcc/multi3.c b/qemu/roms/openbios/libgcc/multi3.c new file mode 100644 index 000000000..e7186be2a --- /dev/null +++ b/qemu/roms/openbios/libgcc/multi3.c @@ -0,0 +1,83 @@ +/* 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. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin St, Fifth Floor, Boston, +MA 02110-1301, USA. */ + +#include "libgcc.h" + +#define BITS_PER_UNIT 8 +#define DI_TYPE_SIZE 64 + +#define __BITS4 (DI_TYPE_SIZE / 4) +#define __ll_B (1L << (DI_TYPE_SIZE / 2)) +#define __ll_lowpart(t) ((UDItype) (t) % __ll_B) +#define __ll_highpart(t) ((UDItype) (t) / __ll_B) + +#define umul_ppmm(w1, w0, u, v) \ + do { \ + UDItype __x0, __x1, __x2, __x3; \ + UDItype __ul, __vl, __uh, __vh; \ + \ + __ul = __ll_lowpart (u); \ + __uh = __ll_highpart (u); \ + __vl = __ll_lowpart (v); \ + __vh = __ll_highpart (v); \ + \ + __x0 = (UDItype) __ul * __vl; \ + __x1 = (UDItype) __ul * __vh; \ + __x2 = (UDItype) __uh * __vl; \ + __x3 = (UDItype) __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) + +#define __umulsidi3(u, v) \ + ({TIunion __w; \ + umul_ppmm (__w.s.high, __w.s.low, u, v); \ + __w.ll; }) + +struct TIstruct {DItype high, low;}; + +typedef union +{ + struct TIstruct s; + TItype ll; +} TIunion; + +TItype +__multi3 (TItype u, TItype v) +{ + TIunion w; + TIunion uu, vv; + + uu.ll = u, + vv.ll = v; + + w.ll = __umulsidi3 (uu.s.low, vv.s.low); + w.s.high += ((UDItype) uu.s.low * (UDItype) vv.s.high + + (UDItype) uu.s.high * (UDItype) vv.s.low); + + return w.ll; +} |