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  1. /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
  2. /* @(#)w_j1.c 5.1 93/09/24 */
  3. /*
  4.  * ====================================================
  5.  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  6.  *
  7.  * Developed at SunPro, a Sun Microsystems, Inc. business.
  8.  * Permission to use, copy, modify, and distribute this
  9.  * software is freely granted, provided that this notice
  10.  * is preserved.
  11.  * ====================================================
  12.  */
  13.  
  14. #if defined(LIBM_SCCS) && !defined(lint)
  15. static char rcsid[] = "$Id: w_j1.c,v 1.4 1994/08/10 20:34:35 jtc Exp $";
  16. #endif
  17.  
  18. /*
  19.  * wrapper of j1,y1
  20.  */
  21.  
  22. #include "math.h"
  23. #include "math_private.h"
  24.  
  25. #ifdef __STDC__
  26.         double j1(double x)             /* wrapper j1 */
  27. #else
  28.         double j1(x)                    /* wrapper j1 */
  29.         double x;
  30. #endif
  31. {
  32. #ifdef _IEEE_LIBM
  33.         return __ieee754_j1(x);
  34. #else
  35.         double z;
  36.         z = __ieee754_j1(x);
  37.         if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
  38.         if(fabs(x)>X_TLOSS) {
  39.                 return __kernel_standard(x,x,36); /* j1(|x|>X_TLOSS) */
  40.         } else
  41.             return z;
  42. #endif
  43. }
  44.  
  45. #ifdef __STDC__
  46.         double y1(double x)             /* wrapper y1 */
  47. #else
  48.         double y1(x)                    /* wrapper y1 */
  49.         double x;
  50. #endif
  51. {
  52. #ifdef _IEEE_LIBM
  53.         return __ieee754_y1(x);
  54. #else
  55.         double z;
  56.         z = __ieee754_y1(x);
  57.         if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
  58.         if(x <= 0.0){
  59.                 if(x==0.0)
  60.                     /* d= -one/(x-x); */
  61.                     return __kernel_standard(x,x,10);
  62.                 else
  63.                     /* d = zero/(x-x); */
  64.                     return __kernel_standard(x,x,11);
  65.         }
  66.         if(x>X_TLOSS) {
  67.                 return __kernel_standard(x,x,37); /* y1(x>X_TLOSS) */
  68.         } else
  69.             return z;
  70. #endif
  71. }
  72.