newlib/libm/math/w_j1.c

   1
   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 /*
  15  * wrapper of j1,y1
  16  */
  17
  18 #include "fdlibm.h"
  19 #include <errno.h>
  20
  21 #ifndef _DOUBLE_IS_32BITS
  22
  23 #ifdef __STDC__
  24         double j1(double x)             /* wrapper j1 */
  25 #else
  26         double j1(x)                    /* wrapper j1 */
  27         double x;
  28 #endif
  29 {
  30 #ifdef _IEEE_LIBM
  31         return __ieee754_j1(x);
  32 #else
  33         double z;
  34         struct exception exc;
  35         z = __ieee754_j1(x);
  36         if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
  37         if(fabs(x)>X_TLOSS) {
  38             /* j1(|x|>X_TLOSS) */
  39             exc.type = TLOSS;
  40             exc.name = "j1";
  41             exc.err = 0;
  42             exc.arg1 = exc.arg2 = x;
  43             exc.retval = 0.0;
  44             if (_LIB_VERSION == _POSIX_)
  45                 errno = ERANGE;
  46             else if (!matherr(&exc)) {
  47                 errno = ERANGE;
  48             }
  49             if (exc.err != 0)
  50                errno = exc.err;
  51             return exc.retval;
  52         } else
  53             return z;
  54 #endif
  55 }
  56
  57 #ifdef __STDC__
  58         double y1(double x)             /* wrapper y1 */
  59 #else
  60         double y1(x)                    /* wrapper y1 */
  61         double x;
  62 #endif
  63 {
  64 #ifdef _IEEE_LIBM
  65         return __ieee754_y1(x);
  66 #else
  67         double z;
  68         struct exception exc;
  69         z = __ieee754_y1(x);
  70         if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
  71         if(x <= 0.0){
  72 #ifndef HUGE_VAL
  73 #define HUGE_VAL inf
  74             double inf = 0.0;
  75
  76             SET_HIGH_WORD(inf,0x7ff00000);      /* set inf to infinite */
  77 #endif
  78             /* y1(0) = -inf  or y1(x<0) = NaN */
  79             exc.type = DOMAIN;  /* should be SING for IEEE */
  80             exc.name = "y1";
  81             exc.err = 0;
  82             exc.arg1 = exc.arg2 = x;
  83             if (_LIB_VERSION == _SVID_)
  84                exc.retval = -HUGE;
  85             else
  86                exc.retval = -HUGE_VAL;
  87             if (_LIB_VERSION == _POSIX_)
  88                errno = EDOM;
  89             else if (!matherr(&exc)) {
  90                errno = EDOM;
  91             }
  92             if (exc.err != 0)
  93                errno = exc.err;
  94             return exc.retval;
  95         }
  96         if(x>X_TLOSS) {
  97             /* y1(x>X_TLOSS) */
  98             exc.type = TLOSS;
  99             exc.name = "y1";
 100             exc.err = 0;
 101             exc.arg1 = exc.arg2 = x;
 102             exc.retval = 0.0;
 103             if (_LIB_VERSION == _POSIX_)
 104                 errno = ERANGE;
 105             else if (!matherr(&exc)) {
 106                 errno = ERANGE;
 107             }
 108             if (exc.err != 0)
 109                errno = exc.err;
 110             return exc.retval;
 111         } else
 112             return z;
 113 #endif
 114 }
 115
 116 #endif /* defined(_DOUBLE_IS_32BITS) */
 117
 118
 119
 120
 121