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
;