1 | /* Complex cosine hyperbole function for float. |
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2 | Copyright (C) 1997 Free Software Foundation, Inc. |
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3 | This file is part of the GNU C Library. |
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4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
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5 | |
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6 | The GNU C Library is free software; you can redistribute it and/or |
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7 | modify it under the terms of the GNU Lesser General Public |
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8 | License as published by the Free Software Foundation; either |
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9 | version 2.1 of the License, or (at your option) any later version. |
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10 | |
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11 | The GNU C Library is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | Lesser General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU Lesser General Public |
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17 | License along with the GNU C Library; if not, write to the Free |
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18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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19 | 02111-1307 USA. */ |
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20 | |
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21 | #include <complex.h> |
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22 | #include <fenv.h> |
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23 | #include <math.h> |
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24 | |
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25 | #include "math_private.h" |
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26 | |
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27 | |
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28 | __complex__ float |
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29 | __ccoshf (__complex__ float x) |
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30 | { |
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31 | __complex__ float retval; |
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32 | int rcls = fpclassify (__real__ x); |
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33 | int icls = fpclassify (__imag__ x); |
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34 | |
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35 | if (rcls >= FP_ZERO) |
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36 | { |
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37 | /* Real part is finite. */ |
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38 | if (icls >= FP_ZERO) |
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39 | { |
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40 | /* Imaginary part is finite. */ |
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41 | float sinh_val = __ieee754_sinhf (__real__ x); |
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42 | float cosh_val = __ieee754_coshf (__real__ x); |
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43 | float sinix, cosix; |
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44 | |
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45 | __sincosf (__imag__ x, &sinix, &cosix); |
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46 | |
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47 | __real__ retval = cosh_val * cosix; |
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48 | __imag__ retval = sinh_val * sinix; |
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49 | } |
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50 | else |
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51 | { |
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52 | __imag__ retval = __real__ x == 0.0 ? 0.0 : __nanf (""); |
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53 | __real__ retval = __nanf (""); |
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54 | |
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55 | #ifdef FE_INVALID |
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56 | if (icls == FP_INFINITE) |
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57 | feraiseexcept (FE_INVALID); |
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58 | #endif |
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59 | } |
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60 | } |
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61 | else if (rcls == FP_INFINITE) |
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62 | { |
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63 | /* Real part is infinite. */ |
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64 | if (icls == FP_ZERO) |
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65 | { |
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66 | /* Imaginary part is 0.0. */ |
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67 | __real__ retval = HUGE_VALF; |
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68 | __imag__ retval = __imag__ x * __copysignf (1.0, __real__ x); |
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69 | } |
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70 | else if (icls > FP_ZERO) |
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71 | { |
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72 | /* Imaginary part is finite. */ |
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73 | float sinix, cosix; |
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74 | |
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75 | __sincosf (__imag__ x, &sinix, &cosix); |
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76 | |
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77 | __real__ retval = __copysignf (HUGE_VALF, cosix); |
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78 | __imag__ retval = (__copysignf (HUGE_VALF, sinix) |
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79 | * __copysignf (1.0, __real__ x)); |
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80 | } |
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81 | else |
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82 | { |
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83 | /* The addition raises the invalid exception. */ |
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84 | __real__ retval = HUGE_VALF; |
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85 | __imag__ retval = __nanf ("") + __nanf (""); |
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86 | |
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87 | #ifdef FE_INVALID |
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88 | if (icls == FP_INFINITE) |
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89 | feraiseexcept (FE_INVALID); |
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90 | #endif |
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91 | } |
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92 | } |
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93 | else |
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94 | { |
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95 | __real__ retval = __nanf (""); |
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96 | __imag__ retval = __imag__ x == 0.0 ? __imag__ x : __nanf (""); |
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97 | } |
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98 | |
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99 | return retval; |
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100 | } |
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101 | weak_alias (__ccoshf, ccoshf) |
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