sysdeps/libm-ieee754/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 #if defined(LIBM_SCCS) && !defined(lint)
  17 static char rcsid[] = "$NetBSD: w_jnf.c,v 1.3 1995/05/10 20:49:21 jtc Exp $";
  18 #endif
  19
  20 #include "math.h"
  21 #include "math_private.h"
  22
  23 #ifdef __STDC__
  24         float __jnf(int n, float x)     /* wrapper jnf */
  25 #else
  26         float __jnf(n,x)                        /* wrapper jnf */
  27         float x; int n;
  28 #endif
  29 {
  30 #ifdef _IEEE_LIBM
  31         return __ieee754_jnf(n,x);
  32 #else
  33         float z;
  34         z = __ieee754_jnf(n,x);
  35         if(_LIB_VERSION == _IEEE_ || __isnanf(x) ) return z;
  36         if(fabsf(x)>(float)X_TLOSS) {
  37             /* jn(|x|>X_TLOSS,n) */
  38             return (float)__kernel_standard((double)n,(double)x,138);
  39         } else
  40             return z;
  41 #endif
  42 }
  43 weak_alias (__jnf, jnf)
  44
  45 #ifdef __STDC__
  46         float __ynf(int n, float x)     /* wrapper ynf */
  47 #else
  48         float __ynf(n,x)                        /* wrapper ynf */
  49         float x; int n;
  50 #endif
  51 {
  52 #ifdef _IEEE_LIBM
  53         return __ieee754_ynf(n,x);
  54 #else
  55         float z;
  56         z = __ieee754_ynf(n,x);
  57         if(_LIB_VERSION == _IEEE_ || __isnanf(x) ) return z;
  58         if(x <= (float)0.0){
  59                 if(x==(float)0.0)
  60                     /* d= -one/(x-x); */
  61                     return (float)__kernel_standard((double)n,(double)x,112);
  62                 else
  63                     /* d = zero/(x-x); */
  64                     return (float)__kernel_standard((double)n,(double)x,113);
  65         }
  66         if(x>(float)X_TLOSS) {
  67             /* yn(x>X_TLOSS,n) */
  68             return (float)__kernel_standard((double)n,(double)x,139);
  69         } else
  70             return z;
  71 #endif
  72 }
  73 weak_alias (__ynf, ynf)