contrib/mpc/src/mul_2si.c

   1 /* mpc_mul_2si -- Multiply a complex number by 2^e.
   2
   3 Copyright (C) 2012 INRIA
   4
   5 This file is part of GNU MPC.
   6
   7 GNU MPC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU Lesser General Public License as published by the
   9 Free Software Foundation; either version 3 of the License, or (at your
  10 option) any later version.
  11
  12 GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  14 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
  15 more details.
  16
  17 You should have received a copy of the GNU Lesser General Public License
  18 along with this program. If not, see http://www.gnu.org/licenses/ .
  19 */
  20
  21 #include "mpc-impl.h"
  22
  23 int
  24 mpc_mul_2si (mpc_ptr a, mpc_srcptr b, long int c, mpc_rnd_t rnd)
  25 {
  26   int inex_re, inex_im;
  27
  28   inex_re = mpfr_mul_2si (mpc_realref(a), mpc_realref(b), c, MPC_RND_RE(rnd));
  29   inex_im = mpfr_mul_2si (mpc_imagref(a), mpc_imagref(b), c, MPC_RND_IM(rnd));
  30
  31   return MPC_INEX(inex_re, inex_im);
  32 }