| 1 | /* wf_atanh.c -- float version of w_atanh.c. |
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| 2 | * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. |
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| 3 | */ |
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| 4 | |
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| 5 | /* |
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| 6 | * ==================================================== |
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| 7 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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| 8 | * |
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| 9 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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| 10 | * Permission to use, copy, modify, and distribute this |
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| 11 | * software is freely granted, provided that this notice |
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| 12 | * is preserved. |
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| 13 | * ==================================================== |
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| 14 | */ |
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| 15 | /* |
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| 16 | * wrapper atanhf(x) |
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| 17 | */ |
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| 18 | |
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| 19 | #include "fdlibm.h" |
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| 20 | #include <errno.h> |
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| 21 | |
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| 22 | #ifdef __STDC__ |
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| 23 | float atanhf(float x) /* wrapper atanhf */ |
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| 24 | #else |
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| 25 | float atanhf(x) /* wrapper atanhf */ |
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| 26 | float x; |
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| 27 | #endif |
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| 28 | { |
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| 29 | #ifdef _IEEE_LIBM |
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| 30 | return __ieee754_atanhf(x); |
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| 31 | #else |
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| 32 | float z,y; |
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| 33 | struct exception exc; |
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| 34 | z = __ieee754_atanhf(x); |
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| 35 | if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; |
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| 36 | y = fabsf(x); |
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| 37 | if(y>=(float)1.0) { |
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| 38 | if(y>(float)1.0) { |
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| 39 | /* atanhf(|x|>1) */ |
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| 40 | exc.type = DOMAIN; |
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| 41 | exc.name = "atanhf"; |
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| 42 | exc.err = 0; |
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| 43 | exc.arg1 = exc.arg2 = (double)x; |
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| 44 | exc.retval = 0.0/0.0; |
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| 45 | if (_LIB_VERSION == _POSIX_) |
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| 46 | errno = EDOM; |
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| 47 | else if (!matherr(&exc)) { |
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| 48 | errno = EDOM; |
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| 49 | } |
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| 50 | } else { |
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| 51 | /* atanhf(|x|=1) */ |
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| 52 | exc.type = SING; |
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| 53 | exc.name = "atanhf"; |
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| 54 | exc.err = 0; |
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| 55 | exc.arg1 = exc.arg2 = (double)x; |
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| 56 | exc.retval = x/0.0; /* sign(x)*inf */ |
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| 57 | if (_LIB_VERSION == _POSIX_) |
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| 58 | errno = EDOM; |
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| 59 | else if (!matherr(&exc)) { |
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| 60 | errno = EDOM; |
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| 61 | } |
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| 62 | } |
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| 63 | if (exc.err != 0) |
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| 64 | errno = exc.err; |
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| 65 | return (float)exc.retval; |
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| 66 | } else |
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| 67 | return z; |
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| 68 | #endif |
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| 69 | } |
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| 70 | |
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| 71 | #ifdef _DOUBLE_IS_32BITS |
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| 72 | |
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| 73 | #ifdef __STDC__ |
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| 74 | double atanh(double x) |
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| 75 | #else |
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| 76 | double atanh(x) |
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| 77 | double x; |
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| 78 | #endif |
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| 79 | { |
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| 80 | return (double) atanhf((float) x); |
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| 81 | } |
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| 82 | |
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| 83 | #endif /* defined(_DOUBLE_IS_32BITS) */ |
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