Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3362 | Serge | 1 | |
| 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 | |||
| 14 | FUNCTION |
||
| 15 | < |
||
| 16 | |||
| 17 | |||
| 18 | atanh |
||
| 19 | INDEX |
||
| 20 | atanhf |
||
| 21 | |||
| 22 | |||
| 23 | #include |
||
| 24 | double atanh(double <[x]>); |
||
| 25 | float atanhf(float <[x]>); |
||
| 26 | |||
| 27 | |||
| 28 | #include |
||
| 29 | double atanh(<[x]>) |
||
| 30 | double <[x]>; |
||
| 31 | |||
| 32 | |||
| 33 | float <[x]>; |
||
| 34 | |||
| 35 | |||
| 36 | < |
||
| 37 | |||
| 38 | |||
| 39 | < |
||
| 40 | |||
| 41 | |||
| 42 | < |
||
| 43 | |||
| 44 | |||
| 45 | @ifnottex |
||
| 46 | |<[x]>| |
||
| 47 | @end ifnottex |
||
| 48 | @tex |
||
| 49 | $|x|$ |
||
| 50 | @end tex |
||
| 51 | is greater than 1, the global < |
||
| 52 | the result is a NaN. A < |
||
| 53 | |||
| 54 | |||
| 55 | @ifnottex |
||
| 56 | |<[x]>| |
||
| 57 | @end ifnottex |
||
| 58 | @tex |
||
| 59 | $|x|$ |
||
| 60 | @end tex |
||
| 61 | is 1, the global < |
||
| 62 | infinity with the same sign as < |
||
| 63 | |||
| 64 | |||
| 65 | < |
||
| 66 | |||
| 67 | |||
| 68 | Neither < |
||
| 69 | |||
| 70 | |||
| 71 | atanh - pure |
||
| 72 | atanhf - pure |
||
| 73 | |||
| 74 | |||
| 75 | |||
| 76 | |||
| 77 | |||
| 78 | * wrapper atanh(x) |
||
| 79 | */ |
||
| 80 | |||
| 81 | |||
| 82 | #include |
||
| 83 | |||
| 84 | |||
| 85 | |||
| 86 | |||
| 87 | double atanh(double x) /* wrapper atanh */ |
||
| 88 | #else |
||
| 89 | double atanh(x) /* wrapper atanh */ |
||
| 90 | double x; |
||
| 91 | #endif |
||
| 92 | { |
||
| 93 | #ifdef _IEEE_LIBM |
||
| 94 | return __ieee754_atanh(x); |
||
| 95 | #else |
||
| 96 | double z,y; |
||
| 97 | struct exception exc; |
||
| 98 | z = __ieee754_atanh(x); |
||
| 99 | if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; |
||
| 100 | y = fabs(x); |
||
| 101 | if(y>=1.0) { |
||
| 102 | if(y>1.0) { |
||
| 103 | /* atanh(|x|>1) */ |
||
| 104 | exc.type = DOMAIN; |
||
| 105 | exc.name = "atanh"; |
||
| 106 | exc.err = 0; |
||
| 107 | exc.arg1 = exc.arg2 = x; |
||
| 108 | exc.retval = 0.0/0.0; |
||
| 109 | if (_LIB_VERSION == _POSIX_) |
||
| 110 | errno = EDOM; |
||
| 111 | else if (!matherr(&exc)) { |
||
| 112 | errno = EDOM; |
||
| 113 | } |
||
| 114 | } else { |
||
| 115 | /* atanh(|x|=1) */ |
||
| 116 | exc.type = SING; |
||
| 117 | exc.name = "atanh"; |
||
| 118 | exc.err = 0; |
||
| 119 | exc.arg1 = exc.arg2 = x; |
||
| 120 | exc.retval = x/0.0; /* sign(x)*inf */ |
||
| 121 | if (_LIB_VERSION == _POSIX_) |
||
| 122 | errno = EDOM; |
||
| 123 | else if (!matherr(&exc)) { |
||
| 124 | errno = EDOM; |
||
| 125 | } |
||
| 126 | } |
||
| 127 | if (exc.err != 0) |
||
| 128 | errno = exc.err; |
||
| 129 | return exc.retval; |
||
| 130 | } else |
||
| 131 | return z; |
||
| 132 | #endif |
||
| 133 | } |
||
| 134 | |||
| 135 | |||
| 136 |