| /**************************************************************************** |
| * libs/libm/libm/lib_atanf.c |
| * |
| * SPDX-License-Identifier: ISC |
| * SPDX-FileCopyrightText: Copyright (C) 2012 Gregory Nutt. |
| * SPDX-FileContributor: Ported by: Darcy Gong |
| * |
| * It derives from the Rhombus OS math library by Nick Johnson which has |
| * a compatible, MIT-style license: |
| * |
| * Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com> |
| * |
| * Permission to use, copy, modify, and distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <math.h> |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| float atanf(float x) |
| { |
| return asinf(x / sqrtf(x * x + 1.0F)); |
| } |