projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 63551311 UD |
1 | /* Complex sine function for float. |
| 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__ float | |
| 26 | __csinf (__complex__ float x) | |
| 27 | { | |
| 28 | __complex__ float res; | |
| 29 | ||
| 30 | if (!isfinite (__real__ x) || isnan (__imag__ x)) | |
| 31 | { | |
| 32 | if (__real__ x == 0.0 || __imag__ x == 0.0) | |
| 33 | { | |
| 34 | __real__ res = __nanf (""); | |
| 35 | __imag__ res = 0.0; | |
| 36 | } | |
| 37 | else if (__isinff (__imag__ x)) | |
| 38 | { | |
| 39 | __real__ res = __nanf (""); | |
| 40 | __imag__ res = __imag__ x; | |
| 41 | } | |
| 42 | else | |
| 43 | { | |
| 44 | __real__ res = __nanf (""); | |
| 45 | __imag__ res = __nanf (""); | |
| 46 | } | |
| 47 | } | |
| 48 | else | |
| 49 | { | |
| 50 | __complex__ float y; | |
| 51 | ||
| 52 | __real__ y = -__imag__ x; | |
| 53 | __imag__ y = __real__ x; | |
| 54 | ||
| 55 | y = __csinhf (y); | |
| 56 | ||
| 57 | __real__ res = __imag__ y; | |
| 58 | __imag__ res = -__real__ y; | |
| 59 | } | |
| 60 | ||
| 61 | return res; | |
| 62 | } | |
| 63 | weak_alias (__csinf, csinf) |