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      1 /* @(#)w_j0.c 5.1 93/09/24 */
      2 /*
      3  * ====================================================
      4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
      5  *
      6  * Developed at SunPro, a Sun Microsystems, Inc. business.
      7  * Permission to use, copy, modify, and distribute this
      8  * software is freely granted, provided that this notice
      9  * is preserved.
     10  * ====================================================
     11  */
     12 
     13 #include <sys/cdefs.h>
     14 #if defined(LIBM_SCCS) && !defined(lint)
     15 __RCSID("$NetBSD: w_j0.c,v 1.9 2002/05/26 22:02:01 wiz Exp $");
     16 #endif
     17 
     18 /*
     19  * wrapper j0(double x), y0(double x)
     20  */
     21 
     22 #include "math.h"
     23 #include "math_private.h"
     24 
     25 double
     26 j0(double x)		/* wrapper j0 */
     27 {
     28 #ifdef _IEEE_LIBM
     29 	return __ieee754_j0(x);
     30 #else
     31 	double z = __ieee754_j0(x);
     32 	if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
     33 	if(fabs(x)>X_TLOSS) {
     34 	        return __kernel_standard(x,x,34); /* j0(|x|>X_TLOSS) */
     35 	} else
     36 	    return z;
     37 #endif
     38 }
     39 
     40 double
     41 y0(double x)		/* wrapper y0 */
     42 {
     43 #ifdef _IEEE_LIBM
     44 	return __ieee754_y0(x);
     45 #else
     46 	double z;
     47 	z = __ieee754_y0(x);
     48 	if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
     49         if(x <= 0.0){
     50                 if(x==0.0)
     51                     /* d= -one/(x-x); */
     52                     return __kernel_standard(x,x,8);
     53                 else
     54                     /* d = zero/(x-x); */
     55                     return __kernel_standard(x,x,9);
     56         }
     57 	if(x>X_TLOSS) {
     58 	        return __kernel_standard(x,x,35); /* y0(x>X_TLOSS) */
     59 	} else
     60 	    return z;
     61 #endif
     62 }
     63