js/src/fdlibm/w_j0.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  *
   3  * ***** BEGIN LICENSE BLOCK *****
   4  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version
   7  * 1.1 (the "License"); you may not use this file except in compliance with
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  12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  13  * for the specific language governing rights and limitations under the
  14  * License.
  15  *
  16  * The Original Code is Mozilla Communicator client code, released
  17  * March 31, 1998.
  18  *
  19  * The Initial Developer of the Original Code is
  20  * Sun Microsystems, Inc.
  21  * Portions created by the Initial Developer are Copyright (C) 1998
  22  * the Initial Developer. All Rights Reserved.
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  26  * Alternatively, the contents of this file may be used under the terms of
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  38  * ***** END LICENSE BLOCK ***** */
  39
  40 /* @(#)w_j0.c 1.3 95/01/18 */
  41 /*
  42  * ====================================================
  43  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  44  *
  45  * Developed at SunSoft, a Sun Microsystems, Inc. business.
  46  * Permission to use, copy, modify, and distribute this
  47  * software is freely granted, provided that this notice
  48  * is preserved.
  49  * ====================================================
  50  */
  51
  52 /*
  53  * wrapper j0(double x), y0(double x)
  54  */
  55
  56 #include "fdlibm.h"
  57
  58 #ifdef __STDC__
  59         double fd_j0(double x)          /* wrapper j0 */
  60 #else
  61         double fd_j0(x)                 /* wrapper j0 */
  62         double x;
  63 #endif
  64 {
  65 #ifdef _IEEE_LIBM
  66         return __ieee754_j0(x);
  67 #else
  68         double z = __ieee754_j0(x);
  69         if(_LIB_VERSION == _IEEE_ || fd_isnan(x)) return z;
  70         if(fd_fabs(x)>X_TLOSS) {
  71         int err;
  72         return __kernel_standard(x,x,34,&err); /* j0(|x|>X_TLOSS) */
  73         } else
  74             return z;
  75 #endif
  76 }
  77
  78 #ifdef __STDC__
  79         double y0(double x)             /* wrapper y0 */
  80 #else
  81         double y0(x)                    /* wrapper y0 */
  82         double x;
  83 #endif
  84 {
  85 #ifdef _IEEE_LIBM
  86         return __ieee754_y0(x);
  87 #else
  88         double z;
  89     int err;
  90         z = __ieee754_y0(x);
  91         if(_LIB_VERSION == _IEEE_ || fd_isnan(x) ) return z;
  92         if(x <= 0.0){
  93                 if(x==0.0)
  94                     /* d= -one/(x-x); */
  95                     return __kernel_standard(x,x,8,&err);
  96                 else
  97                     /* d = zero/(x-x); */
  98                     return __kernel_standard(x,x,9,&err);
  99         }
 100         if(x>X_TLOSS) {
 101                 return __kernel_standard(x,x,35,&err); /* y0(x>X_TLOSS) */
 102         } else
 103             return z;
 104 #endif
 105 }