lib/libm/src/w_jnf.c

   1 /* w_jnf.c -- float version of w_jn.c.
   2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
   3  */
   4
   5 /*
   6  * ====================================================
   7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   8  *
   9  * Developed at SunPro, a Sun Microsystems, Inc. business.
  10  * Permission to use, copy, modify, and distribute this
  11  * software is freely granted, provided that this notice
  12  * is preserved.
  13  * ====================================================
  14  */
  15
  16 #include <sys/cdefs.h>
  17 #if defined(LIBM_SCCS) && !defined(lint)
  18 __RCSID("$NetBSD: w_jnf.c,v 1.6 2002/05/26 22:02:02 wiz Exp $");
  19 #endif
  20
  21 #include "math.h"
  22 #include "math_private.h"
  23
  24 float
  25 jnf(int n, float x)     /* wrapper jnf */
  26 {
  27 #ifdef _IEEE_LIBM
  28         return __ieee754_jnf(n,x);
  29 #else
  30         float z;
  31         z = __ieee754_jnf(n,x);
  32         if(_LIB_VERSION == _IEEE_ || isnanf(x) ) return z;
  33         if(fabsf(x)>(float)X_TLOSS) {
  34             /* jn(|x|>X_TLOSS,n) */
  35             return (float)__kernel_standard((double)n,(double)x,138);
  36         } else
  37             return z;
  38 #endif
  39 }
  40
  41 float
  42 ynf(int n, float x)     /* wrapper ynf */
  43 {
  44 #ifdef _IEEE_LIBM
  45         return __ieee754_ynf(n,x);
  46 #else
  47         float z;
  48         z = __ieee754_ynf(n,x);
  49         if(_LIB_VERSION == _IEEE_ || isnanf(x) ) return z;
  50         if(x <= (float)0.0){
  51                 if(x==(float)0.0)
  52                     /* d= -one/(x-x); */
  53                     return (float)__kernel_standard((double)n,(double)x,112);
  54                 else
  55                     /* d = zero/(x-x); */
  56                     return (float)__kernel_standard((double)n,(double)x,113);
  57         }
  58         if(x>(float)X_TLOSS) {
  59             /* yn(x>X_TLOSS,n) */
  60             return (float)__kernel_standard((double)n,(double)x,139);
  61         } else
  62             return z;
  63 #endif
  64 }