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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