text: /* w_jnl.c -- long double version of w_jn.c.
   * Conversion to long double by Ulrich Drepper,
   * Cygnus Support, drepper@cygnus.com.
   */
  
  /*
   * ====================================================
   * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   *
   * Developed at SunPro, a Sun Microsystems, Inc. business.
   * Permission to use, copy, modify, and distribute this
   * software is freely granted, provided that this notice
   * is preserved.
   * ====================================================
   */
  
  #if defined(LIBM_SCCS) && !defined(lint)
  static char rcsid[] = "$NetBSD: $";
  #endif
  
  /*
   * wrapper jn(int n, double x), yn(int n, double x)
   * floating point Bessel's function of the 1st and 2nd kind
   * of order n
   *
   * Special cases:
   *	y0(0)=y1(0)=yn(n,0) = -inf with division by zero signal;
   *	y0(-ve)=y1(-ve)=yn(n,-ve) are NaN with invalid signal.
   * Note 2. About jn(n,x), yn(n,x)
   *	For n=0, j0(x) is called,
   *	for n=1, j1(x) is called,
   *	for n<x, forward recursion us used starting
   *	from values of j0(x) and j1(x).
   *	for n>x, a continued fraction approximation to
   *	j(n,x)/j(n-1,x) is evaluated and then backward
   *	recursion is used starting from a supposed value
   *	for j(n,x). The resulting value of j(0,x) is
   *	compared with the actual value to correct the
   *	supposed value of j(n,x).
   *
   *	yn(n,x) is similar in all respects, except
   *	that forward recursion is used for all
   *	values of n>1.
   *
   */
  
  #include <math.h>
  #include <math_private.h>
  
  long double __jnl(int n, long double x)	/* wrapper jnl */
  {
  #ifdef _IEEE_LIBM
  	return __ieee754_jnl(n,x);
  #else
  	long double z;
  	z = __ieee754_jnl(n,x);
  	if (_LIB_VERSION == _IEEE_
  	    || _LIB_VERSION == _POSIX_
  	    || isnan(x))
  	  return z;
  	if(fabsl(x)>X_TLOSS) {
  	    return __kernel_standard_l((double)n,x,238); /* jn(|x|>X_TLOSS,n) */
  	} else
  	    return z;
  #endif
  }
  weak_alias (__jnl, jnl)
  
  long double __ynl(int n, long double x)	/* wrapper ynl */
  {
  #ifdef _IEEE_LIBM
  	return __ieee754_ynl(n,x);
  #else
  	long double z;
  	z = __ieee754_ynl(n,x);
  	if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
          if(x <= 0.0){
                  if(x==0.0)
                      /* d= -one/(x-x); */
                      return __kernel_standard_l((double)n,x,212);
                  else
                      /* d = zero/(x-x); */
                      return __kernel_standard_l((double)n,x,213);
          }
  	if(x>X_TLOSS && _LIB_VERSION != _POSIX_) {
  	    return __kernel_standard_l((double)n,x,239); /* yn(x>X_TLOSS,n) */
  	} else
  	    return z;
  #endif
  }
  weak_alias (__ynl, ynl)
  