lib/libm/src/w_j1.c

   1 /* @(#)w_j1.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_j1.c,v 1.9 2002/05/26 22:02:01 wiz Exp $");
  16 #endif
  17
  18 /*
  19  * wrapper of j1,y1
  20  */
  21
  22 #include "math.h"
  23 #include "math_private.h"
  24
  25 double
  26 j1(double x)            /* wrapper j1 */
  27 {
  28 #ifdef _IEEE_LIBM
  29         return __ieee754_j1(x);
  30 #else
  31         double z;
  32         z = __ieee754_j1(x);
  33         if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
  34         if(fabs(x)>X_TLOSS) {
  35                 return __kernel_standard(x,x,36); /* j1(|x|>X_TLOSS) */
  36         } else
  37             return z;
  38 #endif
  39 }
  40
  41 double
  42 y1(double x)            /* wrapper y1 */
  43 {
  44 #ifdef _IEEE_LIBM
  45         return __ieee754_y1(x);
  46 #else
  47         double z;
  48         z = __ieee754_y1(x);
  49         if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
  50         if(x <= 0.0){
  51                 if(x==0.0)
  52                     /* d= -one/(x-x); */
  53                     return __kernel_standard(x,x,10);
  54                 else
  55                     /* d = zero/(x-x); */
  56                     return __kernel_standard(x,x,11);
  57         }
  58         if(x>X_TLOSS) {
  59                 return __kernel_standard(x,x,37); /* y1(x>X_TLOSS) */
  60         } else
  61             return z;
  62 #endif
  63 }