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-rw-r--r--math/s_csinf.c129
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diff --git a/math/s_csinf.c b/math/s_csinf.c
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-/* Complex sine 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 Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include <complex.h>
-#include <fenv.h>
-#include <math.h>
-
-#include "math_private.h"
-
-
-__complex__ float
-__csinf (__complex__ float x)
-{
- __complex__ float retval;
- int negate = signbit (__real__ x);
- int rcls = fpclassify (__real__ x);
- int icls = fpclassify (__imag__ x);
-
- __real__ x = fabsf (__real__ x);
-
- if (icls >= FP_ZERO)
- {
- /* Imaginary part is finite. */
- if (rcls >= FP_ZERO)
- {
- /* Real part is finite. */
- float sinh_val = __ieee754_sinhf (__imag__ x);
- float cosh_val = __ieee754_coshf (__imag__ x);
- float sinix, cosix;
-
- __sincosf (__real__ x, &sinix, &cosix);
-
- __real__ retval = cosh_val * sinix;
- __imag__ retval = sinh_val * cosix;
-
- if (negate)
- __real__ retval = -__real__ retval;
- }
- else
- {
- if (icls == FP_ZERO)
- {
- /* Imaginary part is 0.0. */
- __real__ retval = __nanf ("");
- __imag__ retval = __imag__ x;
-
-#ifdef FE_INVALID
- if (rcls == FP_INFINITE)
- feraiseexcept (FE_INVALID);
-#endif
- }
- else
- {
- __real__ retval = __nanf ("");
- __imag__ retval = __nanf ("");
-
-#ifdef FE_INVALID
- feraiseexcept (FE_INVALID);
-#endif
- }
- }
- }
- else if (icls == FP_INFINITE)
- {
- /* Imaginary part is infinite. */
- if (rcls == FP_ZERO)
- {
- /* Real part is 0.0. */
- __real__ retval = __copysignf (0.0, negate ? -1.0 : 1.0);
- __imag__ retval = __imag__ x;
- }
- else if (rcls > FP_ZERO)
- {
- /* Real part is finite. */
- float sinix, cosix;
-
- __sincosf (__real__ x, &sinix, &cosix);
-
- __real__ retval = __copysignf (HUGE_VALF, sinix);
- __imag__ retval = __copysignf (HUGE_VALF, cosix);
-
- if (negate)
- __real__ retval = -__real__ retval;
- if (signbit (__imag__ x))
- __imag__ retval = -__imag__ retval;
- }
- else
- {
- /* The addition raises the invalid exception. */
- __real__ retval = __nanf ("");
- __imag__ retval = HUGE_VALF;
-
-#ifdef FE_INVALID
- if (rcls == FP_INFINITE)
- feraiseexcept (FE_INVALID);
-#endif
- }
- }
- else
- {
- if (rcls == FP_ZERO)
- __real__ retval = __copysignf (0.0, negate ? -1.0 : 1.0);
- else
- __real__ retval = __nanf ("");
- __imag__ retval = __nanf ("");
- }
-
- return retval;
-}
-#ifndef __csinf
-weak_alias (__csinf, csinf)
-#endif