libm/cexp.c

   1 /*
   2  * Copyright (c) 2011 William Pitcock <nenolod@dereferenced.org>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   9  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  10  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  11  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  12  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  13  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  14  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  15  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  16  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  17  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  18  * POSSIBILITY OF SUCH DAMAGE.
  19  */
  20
  21 #include <features.h>
  22 #include <math.h>
  23 #include <complex.h>
  24
  25 __complex__ double cexp(__complex__ double z)
  26 {
  27         __complex__ double ret;
  28         double r_exponent = exp(__real__ z);
  29
  30         __real__ ret = r_exponent * cos(__imag__ z);
  31         __imag__ ret = r_exponent * sin(__imag__ z);
  32
  33         return ret;
  34 }
  35 libm_hidden_def(cexp)
  36
  37 libm_hidden_proto(cexpf)
  38 __complex__ float cexpf(__complex__ float z)
  39 {
  40         __complex__ float ret;
  41         double r_exponent = exp(__real__ z);
  42
  43         __real__ ret = r_exponent * cosf(__imag__ z);
  44         __imag__ ret = r_exponent * sinf(__imag__ z);
  45
  46         return ret;
  47 }
  48 libm_hidden_def(cexpf)
  49
  50 #if defined __UCLIBC_HAS_LONG_DOUBLE_MATH__ && !defined __NO_LONG_DOUBLE_MATH
  51 libm_hidden_proto(cexpl)
  52 __complex__ long double cexpl(__complex__ long double z)
  53 {
  54         __complex__ long double ret;
  55         long double r_exponent = expl(__real__ z);
  56
  57         __real__ ret = r_exponent * cosl(__imag__ z);
  58         __imag__ ret = r_exponent * sinl(__imag__ z);
  59
  60         return ret;
  61 }
  62 libm_hidden_def(cexpl)
  63 #endif