source: trunk/sys/libm/w_j1.c @ 50

/* @(#)w_j1.c 5.1 93/09/24 */
/*
 * ====================================================
 * 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.
 * ====================================================
 */

/* 
 * wrapper of j1,y1 
 */

#include <libm/fdlibm.h>

#ifdef __STDC__
        double j1(double x)             /* wrapper j1 */
#else
        double j1(x)                    /* wrapper j1 */
        double x;
#endif
{
#ifdef _IEEE_LIBM
        return __ieee754_j1(x);
#else
        double z;
        z = __ieee754_j1(x);
        if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
        if(fabs(x)>X_TLOSS) {
                return __kernel_standard(x,x,36); /* j1(|x|>X_TLOSS) */
        } else
            return z;
#endif
}

#ifdef __STDC__
        double y1(double x)             /* wrapper y1 */
#else
        double y1(x)                    /* wrapper y1 */
        double x;
#endif
{
#ifdef _IEEE_LIBM
        return __ieee754_y1(x);
#else
        double z;
        z = __ieee754_y1(x);
        if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
        if(x <= 0.0){
                if(x==0.0)
                    /* d= -one/(x-x); */
                    return __kernel_standard(x,x,10);
                else
                    /* d = zero/(x-x); */
                    return __kernel_standard(x,x,11);
        }
        if(x>X_TLOSS) {
                return __kernel_standard(x,x,37); /* y1(x>X_TLOSS) */
        } else
            return z;
#endif
}