sysdeps/libm-ieee754/w_j0.c

   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 #if defined(LIBM_SCCS) && !defined(lint)
  14 static char rcsid[] = "$NetBSD: w_j0.c,v 1.6 1995/05/10 20:49:11 jtc Exp $";
  15 #endif
  16
  17 /*
  18  * wrapper j0(double x), y0(double x)
  19  */
  20
  21 #include "math.h"
  22 #include "math_private.h"
  23
  24 #ifdef __STDC__
  25         double __j0(double x)           /* wrapper j0 */
  26 #else
  27         double __j0(x)                  /* wrapper j0 */
  28         double x;
  29 #endif
  30 {
  31 #ifdef _IEEE_LIBM
  32         return __ieee754_j0(x);
  33 #else
  34         double z = __ieee754_j0(x);
  35         if(_LIB_VERSION == _IEEE_ || __isnan(x)) return z;
  36         if(fabs(x)>X_TLOSS) {
  37                 return __kernel_standard(x,x,34); /* j0(|x|>X_TLOSS) */
  38         } else
  39             return z;
  40 #endif
  41 }
  42 weak_alias (__j0, j0)
  43 #ifdef NO_LONG_DOUBLE
  44 strong_alias (__j0, __j0l)
  45 weak_alias (__j0, j0l)
  46 #endif
  47
  48
  49 #ifdef __STDC__
  50         double __y0(double x)           /* wrapper y0 */
  51 #else
  52         double __y0(x)                  /* wrapper y0 */
  53         double x;
  54 #endif
  55 {
  56 #ifdef _IEEE_LIBM
  57         return __ieee754_y0(x);
  58 #else
  59         double z;
  60         z = __ieee754_y0(x);
  61         if(_LIB_VERSION == _IEEE_ || __isnan(x) ) return z;
  62         if(x <= 0.0){
  63                 if(x==0.0)
  64                     /* d= -one/(x-x); */
  65                     return __kernel_standard(x,x,8);
  66                 else
  67                     /* d = zero/(x-x); */
  68                     return __kernel_standard(x,x,9);
  69         }
  70         if(x>X_TLOSS) {
  71                 return __kernel_standard(x,x,35); /* y0(x>X_TLOSS) */
  72         } else
  73             return z;
  74 #endif
  75 }
  76 weak_alias (__y0, y0)
  77 #ifdef NO_LONG_DOUBLE
  78 strong_alias (__y0, __y0l)
  79 weak_alias (__y0, y0l)
  80 #endif