git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| e7fd8a39 | 1 | /* Return value of complex exponential function for float complex value. |
| 3e5f5557 UD |
2 | Copyright (C) 1997 Free Software Foundation, Inc. |
| 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 Library General Public License as | |
| 8 | published by the Free Software Foundation; either version 2 of the | |
| 9 | 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 | Library General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Library General Public | |
| 17 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
| 18 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 19 | Boston, MA 02111-1307, USA. */ | |
| 20 | ||
| 21 | #include <complex.h> | |
| 22 | #include <math.h> | |
| 23 | ||
| 24 | ||
| 25 | __complex__ long double | |
| 26 | __cexpl (__complex__ long double x) | |
| 27 | { | |
| 28 | __complex__ long double retval; | |
| 29 | ||
| 30 | if (isfinite (__real__ x)) | |
| 31 | { | |
| 32 | if (isfinite (__imag__ x)) | |
| 33 | { | |
| e7fd8a39 UD |
34 | long double exp_val = __expl (__real__ x); |
| 35 | ||
| 36 | __real__ retval = exp_val * __cosl (__imag__ x); | |
| 37 | __imag__ retval = exp_val * __sinl (__imag__ x); | |
| 3e5f5557 UD |
38 | } |
| 39 | else | |
| e7fd8a39 UD |
40 | { |
| 41 | /* If the imaginary part is +-inf or NaN and the real part | |
| 42 | is not +-inf the result is NaN + iNaN. */ | |
| 43 | __real__ retval = __nanl (""); | |
| 44 | __imag__ retval = __nanl (""); | |
| 45 | } | |
| 3e5f5557 UD |
46 | } |
| 47 | else if (__isinfl (__real__ x)) | |
| 48 | { | |
| e7fd8a39 | 49 | if (isfinite (__imag__ x)) |
| 3e5f5557 UD |
50 | { |
| 51 | if (signbit (__real__ x) == 0 && __imag__ x == 0.0) | |
| e7fd8a39 | 52 | retval = HUGE_VAL; |
| 3e5f5557 | 53 | else |
| e7fd8a39 UD |
54 | { |
| 55 | long double value = signbit (__real__ x) ? 0.0 : HUGE_VALL; | |
| 56 | ||
| 57 | __real__ retval = value * __cosl (__imag__ x); | |
| 58 | __imag__ retval = value * __sinl (__imag__ x); | |
| 59 | } | |
| 60 | } | |
| 61 | else if (signbit (__real__ x) == 0) | |
| 62 | { | |
| 63 | __real__ retval = HUGE_VALL; | |
| 64 | __imag__ retval = __nanl (""); | |
| 3e5f5557 | 65 | } |
| 3e5f5557 UD |
66 | else |
| 67 | retval = 0.0; | |
| 68 | } | |
| 69 | else | |
| e7fd8a39 UD |
70 | { |
| 71 | /* If the real part is NaN the result is NaN + iNaN. */ | |
| 72 | __real__ retval = __nanl (""); | |
| 73 | __imag__ retval = __nanl (""); | |
| 74 | } | |
| 3e5f5557 UD |
75 | |
| 76 | return retval; | |
| 77 | } | |
| e7fd8a39 | 78 | weak_alias (__cexp, cexp) |