projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 01ee3870 | 1 | /* Return arc hyperbolic cosine for a complex type. |
| 2b778ceb | 2 | Copyright (C) 1997-2021 Free Software Foundation, Inc. |
| 281f5073 PM |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Lesser General Public | |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | Lesser General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| 17 | License along with the GNU C Library; if not, see | |
| 5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
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19 | |
| 20 | #include <complex.h> | |
| 21 | #include <math.h> | |
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22 | |
| 23 | ||
| 01ee3870 PM |
24 | CFLOAT |
| 25 | M_DECL_FUNC (__cacosh) (CFLOAT x) | |
| 281f5073 | 26 | { |
| 01ee3870 | 27 | CFLOAT res; |
| 281f5073 PM |
28 | int rcls = fpclassify (__real__ x); |
| 29 | int icls = fpclassify (__imag__ x); | |
| 30 | ||
| 31 | if (rcls <= FP_INFINITE || icls <= FP_INFINITE) | |
| 32 | { | |
| 33 | if (icls == FP_INFINITE) | |
| 34 | { | |
| 01ee3870 | 35 | __real__ res = M_HUGE_VAL; |
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36 | |
| 37 | if (rcls == FP_NAN) | |
| 01ee3870 | 38 | __imag__ res = M_NAN; |
| 281f5073 | 39 | else |
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40 | __imag__ res = M_COPYSIGN ((rcls == FP_INFINITE |
| 41 | ? (__real__ x < 0 | |
| 42 | ? M_MLIT (M_PI) - M_MLIT (M_PI_4) | |
| 43 | : M_MLIT (M_PI_4)) | |
| 44 | : M_MLIT (M_PI_2)), __imag__ x); | |
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45 | } |
| 46 | else if (rcls == FP_INFINITE) | |
| 47 | { | |
| 01ee3870 | 48 | __real__ res = M_HUGE_VAL; |
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49 | |
| 50 | if (icls >= FP_ZERO) | |
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51 | __imag__ res = M_COPYSIGN (signbit (__real__ x) |
| 52 | ? M_MLIT (M_PI) : 0, __imag__ x); | |
| 281f5073 | 53 | else |
| 01ee3870 | 54 | __imag__ res = M_NAN; |
| 281f5073 PM |
55 | } |
| 56 | else | |
| 57 | { | |
| 01ee3870 | 58 | __real__ res = M_NAN; |
| 5244527d JM |
59 | if (rcls == FP_ZERO) |
| 60 | __imag__ res = M_MLIT (M_PI_2); | |
| 61 | else | |
| 62 | __imag__ res = M_NAN; | |
| 281f5073 PM |
63 | } |
| 64 | } | |
| 65 | else if (rcls == FP_ZERO && icls == FP_ZERO) | |
| 66 | { | |
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67 | __real__ res = 0; |
| 68 | __imag__ res = M_COPYSIGN (M_MLIT (M_PI_2), __imag__ x); | |
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69 | } |
| 70 | else | |
| 71 | { | |
| 01ee3870 | 72 | CFLOAT y; |
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73 | |
| 74 | __real__ y = -__imag__ x; | |
| 75 | __imag__ y = __real__ x; | |
| 76 | ||
| 01ee3870 | 77 | y = M_SUF (__kernel_casinh) (y, 1); |
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78 | |
| 79 | if (signbit (__imag__ x)) | |
| 80 | { | |
| 81 | __real__ res = __real__ y; | |
| 82 | __imag__ res = -__imag__ y; | |
| 83 | } | |
| 84 | else | |
| 85 | { | |
| 86 | __real__ res = -__real__ y; | |
| 87 | __imag__ res = __imag__ y; | |
| 88 | } | |
| 89 | } | |
| 90 | ||
| 91 | return res; | |
| 92 | } | |
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93 | |
| 94 | declare_mgen_alias (__cacosh, cacosh) |