| /* 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 |