xref: /dragonfly/contrib/mpc/src/pow_ld.c (revision d30dc8cb)
1 /* mpc_pow_ld -- Raise a complex number to a long double power.
2 
3 Copyright (C) 2009 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 <stdio.h>    /* for MPC_ASSERT */
22 #include <float.h>    /* for LDBL_MANT_DIG */
23 #include "mpc-impl.h"
24 
25 int
mpc_pow_ld(mpc_ptr z,mpc_srcptr x,long double y,mpc_rnd_t rnd)26 mpc_pow_ld (mpc_ptr z, mpc_srcptr x, long double y, mpc_rnd_t rnd)
27 {
28   mpc_t yy;
29   int inex;
30 
31   MPC_ASSERT(FLT_RADIX == 2);
32   mpc_init3 (yy, LDBL_MANT_DIG, MPFR_PREC_MIN);
33   mpc_set_ld (yy, y, MPC_RNDNN);   /* exact */
34   inex = mpc_pow (z, x, yy, rnd);
35   mpc_clear (yy);
36   return inex;
37 }
38 
39