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annotate libquadmath/math/casinhq.c @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
parents 04ced10e8804
children
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1 /* Return arc hyperbolic sine for a complex float type.
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2 Copyright (C) 1997-2018 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, see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include "quadmath-imp.h"
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21
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22 __complex128
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23 casinhq (__complex128 x)
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24 {
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25 __complex128 res;
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26 int rcls = fpclassifyq (__real__ x);
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27 int icls = fpclassifyq (__imag__ x);
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28
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29 if (rcls <= QUADFP_INFINITE || icls <= QUADFP_INFINITE)
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30 {
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31 if (icls == QUADFP_INFINITE)
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32 {
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33 __real__ res = copysignq (HUGE_VALQ, __real__ x);
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34
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35 if (rcls == QUADFP_NAN)
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36 __imag__ res = nanq ("");
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37 else
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38 __imag__ res = copysignq ((rcls >= QUADFP_ZERO
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39 ? M_PI_2q : M_PI_4q),
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40 __imag__ x);
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41 }
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42 else if (rcls <= QUADFP_INFINITE)
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43 {
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44 __real__ res = __real__ x;
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45 if ((rcls == QUADFP_INFINITE && icls >= QUADFP_ZERO)
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46 || (rcls == QUADFP_NAN && icls == QUADFP_ZERO))
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47 __imag__ res = copysignq (0, __imag__ x);
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48 else
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49 __imag__ res = nanq ("");
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50 }
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51 else
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52 {
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53 __real__ res = nanq ("");
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54 __imag__ res = nanq ("");
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55 }
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56 }
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57 else if (rcls == QUADFP_ZERO && icls == QUADFP_ZERO)
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58 {
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59 res = x;
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60 }
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61 else
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62 {
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63 res = __quadmath_kernel_casinhq (x, 0);
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64 }
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65
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66 return res;
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67 }