1 /* mpf_mul -- Multiply two floats.
3 Copyright 1993, 1994, 1996, 2001, 2005 Free Software Foundation, Inc.
5 This file is part of the GNU MP Library.
7 The GNU MP Library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or (at your
10 option) any later version.
12 The GNU MP Library is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15 License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
24 mpf_mul (mpf_ptr r, mpf_srcptr u, mpf_srcptr v)
27 mp_size_t usize, vsize;
28 mp_size_t sign_product;
29 mp_size_t prec = r->_mp_prec;
35 sign_product = usize ^ vsize;
53 if (usize == 0 || vsize == 0)
56 r->_mp_exp = 0; /* ??? */
65 rsize = usize + vsize;
66 tp = TMP_ALLOC_LIMBS (rsize);
67 cy_limb = (usize >= vsize
68 ? mpn_mul (tp, up, usize, vp, vsize)
69 : mpn_mul (tp, vp, vsize, up, usize));
80 MPN_COPY (rp, tp, rsize);
81 r->_mp_exp = u->_mp_exp + v->_mp_exp - adj;
82 r->_mp_size = sign_product >= 0 ? rsize : -rsize;