diff options
Diffstat (limited to 'sysdeps/generic/asin.c')
-rw-r--r-- | sysdeps/generic/asin.c | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/sysdeps/generic/asin.c b/sysdeps/generic/asin.c deleted file mode 100644 index e75ee3d87e..0000000000 --- a/sysdeps/generic/asin.c +++ /dev/null @@ -1,44 +0,0 @@ -/* Copyright (C) 1991 Free Software Foundation, Inc. -This file is part of the GNU C Library. - -The GNU C Library is free software; you can redistribute it and/or -modify it under the terms of the GNU Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. - -The GNU C Library is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ - -#include <ansidecl.h> -#include <errno.h> -#include <math.h> - -/* Return the inverse sine of X. */ -double -DEFUN(asin, (x), double x) -{ - double abs_x; - - if (__isnan(x)) - { - errno = EDOM; - return x; - } - - abs_x = fabs(x); - - if (abs_x <= 0.5) - return atan2(x, sqrt(1.0 - (x * x))); - else - { - double t = 1.0 - abs_x; - return atan2(x, sqrt((t + t) - (t * t))); - } -} |