b2dad0e372
2000-04-21 Benjamin Kosnik <bkoz@redhat.com> * libstdc++-v3: New directory. From-SVN: r33317
90 lines
2.0 KiB
C
90 lines
2.0 KiB
C
/* Complex sine hyperbole function for float.
|
|
Copyright (C) 1997,1998 Free Software Foundation, Inc.
|
|
|
|
This file is part of the libstdc++ version 3 distribution.
|
|
|
|
This software is a copyrighted work licensed under the terms of the
|
|
Cygnus libstdc++ license. Please consult the file LICENSE.STD for
|
|
details. */
|
|
|
|
#include <math.h>
|
|
#include "mathconf.h"
|
|
|
|
|
|
__complex__ float
|
|
csinhf (__complex__ float x)
|
|
{
|
|
__complex__ float retval;
|
|
int negate = signbit (__real__ x);
|
|
|
|
__real__ x = fabsf (__real__ x);
|
|
|
|
if (FINITEF_P (__real__ x))
|
|
{
|
|
/* Real part is finite. */
|
|
if (FINITEF_P (__imag__ x))
|
|
{
|
|
/* Imaginary part is finite. */
|
|
float sinh_val = sinhf (__real__ x);
|
|
float cosh_val = coshf (__real__ x);
|
|
float sinix = sin (__imag__ x);
|
|
float cosix = cos (__imag__ x);
|
|
|
|
__real__ retval = sinh_val * cosix;
|
|
__imag__ retval = cosh_val * sinix;
|
|
|
|
if (negate)
|
|
__real__ retval = -__real__ retval;
|
|
}
|
|
else
|
|
{
|
|
if (__real__ x == 0.0)
|
|
{
|
|
/* Real part is 0.0. */
|
|
__real__ retval = copysignf (0.0, negate ? -1.0 : 1.0);
|
|
__imag__ retval = NAN + NAN;
|
|
}
|
|
else
|
|
{
|
|
__real__ retval = NAN;
|
|
__imag__ retval = NAN;
|
|
}
|
|
}
|
|
}
|
|
else if (INFINITEF_P (__real__ x))
|
|
{
|
|
/* Real part is infinite. */
|
|
if (__imag__ x == 0.0)
|
|
{
|
|
/* Imaginary part is 0.0. */
|
|
__real__ retval = negate ? -HUGE_VALF : HUGE_VALF;
|
|
__imag__ retval = __imag__ x;
|
|
}
|
|
else if (FINITEF_P (__imag__ x))
|
|
{
|
|
/* Imaginary part is finite. */
|
|
float sinix = sinf (__imag__ x);
|
|
float cosix = cosf (__imag__ x);
|
|
|
|
__real__ retval = copysignf (HUGE_VALF, cosix);
|
|
__imag__ retval = copysignf (HUGE_VALF, sinix);
|
|
|
|
if (negate)
|
|
__real__ retval = -__real__ retval;
|
|
}
|
|
else
|
|
{
|
|
/* The addition raises the invalid exception. */
|
|
__real__ retval = HUGE_VALF;
|
|
__imag__ retval = NAN + NAN;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
__real__ retval = NAN;
|
|
__imag__ retval = __imag__ x == 0.0 ? __imag__ x : NAN;
|
|
}
|
|
|
|
return retval;
|
|
}
|