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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [cmath/] [s_csinl.c] - Rev 207
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/* Complex sine function for long double. 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__ long double __csinl (__complex__ long double x) { __complex__ long double retval; int negate = signbit (__real__ x); int rcls = fpclassify (__real__ x); int icls = fpclassify (__imag__ x); __real__ x = fabsl (__real__ x); if (icls >= FP_ZERO) { /* Imaginary part is finite. */ if (rcls >= FP_ZERO) { /* Real part is finite. */ long double sinh_val = __ieee754_sinhl (__imag__ x); long double cosh_val = __ieee754_coshl (__imag__ x); long double sinix, cosix; __sincosl (__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 = __nanl (""); __imag__ retval = __imag__ x; #ifdef FE_INVALID if (rcls == FP_INFINITE) feraiseexcept (FE_INVALID); #endif } else { __real__ retval = __nanl (""); __imag__ retval = __nanl (""); #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 = __copysignl (0.0, negate ? -1.0 : 1.0); __imag__ retval = __imag__ x; } else if (rcls > FP_ZERO) { /* Real part is finite. */ long double sinix, cosix; __sincosl (__real__ x, &sinix, &cosix); __real__ retval = __copysignl (HUGE_VALL, sinix); __imag__ retval = __copysignl (HUGE_VALL, cosix); if (negate) __real__ retval = -__real__ retval; if (signbit (__imag__ x)) __imag__ retval = -__imag__ retval; } else { /* The addition raises the invalid exception. */ __real__ retval = __nanl (""); __imag__ retval = HUGE_VALL; #ifdef FE_INVALID if (rcls == FP_INFINITE) feraiseexcept (FE_INVALID); #endif } } else { if (rcls == FP_ZERO) __real__ retval = __copysignl (0.0, negate ? -1.0 : 1.0); else __real__ retval = __nanl (""); __imag__ retval = __nanl (""); } return retval; } weak_alias (__csinl, csinl)