sysdeps/m68k/m680x0/fpu/s_csinh_template.c

   1 /* Complex sine hyperbole function.  m68k fpu version
   2    Copyright (C) 1997-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library.  If not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <complex.h>
  21 #include <math.h>
  22 #include "mathimpl.h"
  23
  24 #define CONCATX(a,b) __CONCAT(a,b)
  25 #define s(name) M_SUF (name)
  26 #define m81(func) __m81_u(s(func))
  27
  28 CFLOAT
  29 s(__csinh) (CFLOAT x)
  30 {
  31   CFLOAT retval;
  32   unsigned long ix_cond;
  33
  34   ix_cond = __m81_test (__imag__ x);
  35
  36   if ((ix_cond & (__M81_COND_INF|__M81_COND_NAN)) == 0)
  37     {
  38       /* Imaginary part is finite.  */
  39       FLOAT sin_ix, cos_ix;
  40
  41       __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix)
  42              : "f" (__imag__ x));
  43       __real__ retval = cos_ix * m81(__ieee754_sinh) (__real__ x);
  44       if (ix_cond & __M81_COND_ZERO)
  45         __imag__ retval = __imag__ x;
  46       else
  47         __imag__ retval = sin_ix * m81(__ieee754_cosh) (__real__ x);
  48     }
  49   else
  50     {
  51       unsigned long rx_cond = __m81_test (__real__ x);
  52
  53       __imag__ retval = __imag__ x - __imag__ x;
  54       if (rx_cond & (__M81_COND_ZERO|__M81_COND_INF|__M81_COND_NAN))
  55         __real__ retval = __real__ x;
  56       else
  57         __real__ retval = __imag__ retval;
  58     }
  59
  60   return retval;
  61 }
  62 declare_mgen_alias (__csinh, csinh)