compiler/mlib/w_y1f.c

   1 /* w_y1f.c -- float version of w_y1.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 #ifndef lint
  17 static char rcsid[] = "$FreeBSD: src/lib/msun/src/w_y1f.c,v 1.3 1999/08/28 00:07:10 peter Exp $";
  18 #endif
  19
  20 /*
  21  * wrapper of y1f
  22  */
  23
  24 #include "math.h"
  25 #include "math_private.h"
  26
  27 #ifdef __STDC__
  28         float y1f(float x)              /* wrapper y1f */
  29 #else
  30         float y1f(x)                    /* wrapper y1f */
  31         float x;
  32 #endif
  33 {
  34 #ifdef _IEEE_LIBM
  35         return __ieee754_y1f(x);
  36 #else
  37         float z;
  38         z = __ieee754_y1f(x);
  39         if(_LIB_VERSION == _IEEE_ || isnanf(x) ) return z;
  40         if(x <= (float)0.0){
  41                 if(x==(float)0.0)
  42                     /* d= -one/(x-x); */
  43                     return (float)__kernel_standard((double)x,(double)x,110);
  44                 else
  45                     /* d = zero/(x-x); */
  46                     return (float)__kernel_standard((double)x,(double)x,111);
  47         }
  48         if(x>(float)X_TLOSS) {
  49                 /* y1(x>X_TLOSS) */
  50                 return (float)__kernel_standard((double)x,(double)x,137);
  51         } else
  52             return z;
  53 #endif
  54 }