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glibc  2.9
Functions
w_j1.c File Reference
#include <math.h>
#include "math_private.h"
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Functions

double j1 (double x)
double y1 (double x)

Function Documentation

double j1 ( double  x)

Definition at line 27 of file w_j1.c.

{
#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
}

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double y1 ( double  x)

Definition at line 51 of file w_j1.c.

{
#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
}

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