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