xref: /dragonfly/contrib/mpc/src/pow_fr.c (revision d30dc8cb)
1 /* mpc_pow_fr -- Raise a complex number to a floating-point power.
2 
3 Copyright (C) 2009, 2011 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
mpc_pow_fr(mpc_ptr z,mpc_srcptr x,mpfr_srcptr y,mpc_rnd_t rnd)24 mpc_pow_fr (mpc_ptr z, mpc_srcptr x, mpfr_srcptr y, mpc_rnd_t rnd)
25 {
26   mpc_t yy;
27   int inex;
28 
29   /* avoid copying the significand of y by copying only the struct */
30   mpc_realref(yy)[0] = y[0];
31   mpfr_init2 (mpc_imagref(yy), MPFR_PREC_MIN);
32   mpfr_set_ui (mpc_imagref(yy), 0, GMP_RNDN);
33   inex = mpc_pow (z, x, yy, rnd);
34   mpfr_clear (mpc_imagref(yy));
35   return inex;
36 }
37 
38