diff options
Diffstat (limited to 'sysdeps/libm-ieee754/s_ccoshf.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_ccoshf.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_ccoshf.c b/sysdeps/libm-ieee754/s_ccoshf.c new file mode 100644 index 0000000000..9f2774b6c7 --- /dev/null +++ b/sysdeps/libm-ieee754/s_ccoshf.c @@ -0,0 +1,93 @@ +/* Complex cosine hyperbole function for float. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <complex.h> +#include <math.h> + + +__complex__ float +__ccoshf (__complex__ float x) +{ + __complex__ float retval; + + __real__ x = fabsf (__real__ x); + + if (isfinite (__real__ x)) + { + if (isfinite (__imag__ x)) + { + float exp_val = __expf (__real__ x); + float rec_exp_val = 1.0 / exp_val; + + __real__ retval = (0.5 * (exp_val + rec_exp_val) + * __cosf (__imag__ x)); + __imag__ retval = (0.5 * (exp_val + rec_exp_val) + * __sinf (__imag__ x)); + } + else + { + if (__real__ x == 0) + { + __imag__ retval = 0.0; + __real__ retval = __nanf ("") + __nanf (""); + } + else + { + __real__ retval = __nanf (""); + __imag__ retval = __nanf ("") + __nanf (""); + } + } + } + else if (__isinff (__real__ x)) + { + if (__imag__ x == 0.0) + { + __real__ retval = HUGE_VALF; + __imag__ retval = __imag__ x; + } + else if (isfinite (__imag__ x)) + { + __real__ retval = __copysignf (HUGE_VALF, __cosf (__imag__ x)); + __imag__ retval = __copysignf (HUGE_VALF, __sinf (__imag__ x)); + } + else + { + /* The addition raises the invalid exception. */ + __real__ retval = HUGE_VALF; + __imag__ retval = __nanf ("") + __nanf (""); + } + } + else + { + if (__imag__ x == 0.0) + { + __real__ retval = __nanf (""); + __imag__ retval = __imag__ x; + } + else + { + __real__ retval = __nanf (""); + __imag__ retval = __nanf (""); + } + } + + return retval; +} +weak_alias (__ccoshf, ccoshf) |