compiler/mlib/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 #ifndef lint
  14 static char rcsid[] = "$FreeBSD: src/lib/msun/src/w_j0.c,v 1.6 1999/08/28 00:07:03 peter Exp $";
  15 #endif
  16
  17 /*
  18  * wrapper j0(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 }