compiler/mlib/w_jn.c

   1 /* @(#)w_jn.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_jn.c,v 1.7 1999/08/28 00:07:04 peter Exp $";
  15 #endif
  16
  17 /*
  18  * wrapper jn(int n, double x)
  19  */
  20
  21 #include "math.h"
  22 #include "math_private.h"
  23
  24 #ifdef __STDC__
  25         double jn(int n, double x)      /* wrapper jn */
  26 #else
  27         double jn(n,x)                  /* wrapper jn */
  28         double x; int n;
  29 #endif
  30 {
  31 #ifdef _IEEE_LIBM
  32         return __ieee754_jn(n,x);
  33 #else
  34         double z;
  35         z = __ieee754_jn(n,x);
  36         if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
  37         if(fabs(x)>X_TLOSS) {
  38             return __kernel_standard((double)n,x,38); /* jn(|x|>X_TLOSS,n) */
  39         } else
  40             return z;
  41 #endif
  42 }