From e153959eea4586769950653ca5c956d8f9320bc8 Mon Sep 17 00:00:00 2001 From: Gregory Nutt Date: Mon, 26 Jan 2015 13:52:53 -0600 Subject: [PATCH] Add support for inverse hyperbolic functions. From Brennan Ashton --- include/nuttx/math.h | 24 +++++++++++++++++++ libc/math/Make.defs | 6 ++--- libc/math/lib_acosh.c | 54 ++++++++++++++++++++++++++++++++++++++++++ libc/math/lib_acoshf.c | 52 ++++++++++++++++++++++++++++++++++++++++ libc/math/lib_acoshl.c | 54 ++++++++++++++++++++++++++++++++++++++++++ libc/math/lib_asinh.c | 54 ++++++++++++++++++++++++++++++++++++++++++ libc/math/lib_asinhf.c | 52 ++++++++++++++++++++++++++++++++++++++++ libc/math/lib_asinhl.c | 54 ++++++++++++++++++++++++++++++++++++++++++ libc/math/lib_atanh.c | 54 ++++++++++++++++++++++++++++++++++++++++++ libc/math/lib_atanhf.c | 52 ++++++++++++++++++++++++++++++++++++++++ libc/math/lib_atanhl.c | 54 ++++++++++++++++++++++++++++++++++++++++++ 11 files changed, 507 insertions(+), 3 deletions(-) create mode 100644 libc/math/lib_acosh.c create mode 100644 libc/math/lib_acoshf.c create mode 100644 libc/math/lib_acoshl.c create mode 100644 libc/math/lib_asinh.c create mode 100644 libc/math/lib_asinhf.c create mode 100644 libc/math/lib_asinhl.c create mode 100644 libc/math/lib_atanh.c create mode 100644 libc/math/lib_atanhf.c create mode 100644 libc/math/lib_atanhl.c diff --git a/include/nuttx/math.h b/include/nuttx/math.h index 977d8cac9a..35369ba537 100644 --- a/include/nuttx/math.h +++ b/include/nuttx/math.h @@ -333,6 +333,30 @@ double tanh (double x); long double tanhl (long double x); #endif +float asinhf (float x); +#if CONFIG_HAVE_DOUBLE +double asinh (double x); +#endif +#ifdef CONFIG_HAVE_LONG_DOUBLE +long double asinhl (long double x); +#endif + +float acoshf (float x); +#if CONFIG_HAVE_DOUBLE +double acosh (double x); +#endif +#ifdef CONFIG_HAVE_LONG_DOUBLE +long double acoshl (long double x); +#endif + +float atanhf (float x); +#if CONFIG_HAVE_DOUBLE +double atanh (double x); +#endif +#ifdef CONFIG_HAVE_LONG_DOUBLE +long double atanhl (long double x); +#endif + #if defined(__cplusplus) } #endif diff --git a/libc/math/Make.defs b/libc/math/Make.defs index 768ea8d6f0..b490acb02a 100644 --- a/libc/math/Make.defs +++ b/libc/math/Make.defs @@ -41,19 +41,19 @@ CSRCS += lib_acosf.c lib_asinf.c lib_atan2f.c lib_atanf.c lib_ceilf.c lib_cosf.c CSRCS += lib_coshf.c lib_expf.c lib_fabsf.c lib_floorf.c lib_fmodf.c lib_frexpf.c CSRCS += lib_ldexpf.c lib_logf.c lib_log10f.c lib_log2f.c lib_modff.c lib_powf.c CSRCS += lib_rintf.c lib_roundf.c lib_sinf.c lib_sinhf.c lib_sqrtf.c lib_tanf.c -CSRCS += lib_tanhf.c +CSRCS += lib_tanhf.c lib_asinhf.c lib_acoshf.c lib_atanhf.c CSRCS += lib_acos.c lib_asin.c lib_atan.c lib_atan2.c lib_ceil.c lib_cos.c CSRCS += lib_cosh.c lib_exp.c lib_fabs.c lib_floor.c lib_fmod.c lib_frexp.c CSRCS += lib_ldexp.c lib_log.c lib_log10.c lib_log2.c lib_modf.c lib_pow.c CSRCS += lib_rint.c lib_round.c lib_sin.c lib_sinh.c lib_sqrt.c lib_tan.c -CSRCS += lib_tanh.c +CSRCS += lib_tanh.c lib_asinh.c lib_acosh.c lib_atanh.c CSRCS += lib_acosl.c lib_asinl.c lib_atan2l.c lib_atanl.c lib_ceill.c lib_cosl.c CSRCS += lib_coshl.c lib_expl.c lib_fabsl.c lib_floorl.c lib_fmodl.c lib_frexpl.c CSRCS += lib_ldexpl.c lib_logl.c lib_log10l.c lib_log2l.c lib_modfl.c lib_powl.c CSRCS += lib_rintl.c lib_roundl.c lib_sinl.c lib_sinhl.c lib_sqrtl.c lib_tanl.c -CSRCS += lib_tanhl.c +CSRCS += lib_tanhl.c lib_asinhl.c lib_acoshl.c lib_atanhl.c CSRCS += lib_libexpi.c lib_libsqrtapprox.c diff --git a/libc/math/lib_acosh.c b/libc/math/lib_acosh.c new file mode 100644 index 0000000000..cd9fde5598 --- /dev/null +++ b/libc/math/lib_acosh.c @@ -0,0 +1,54 @@ +/************************************************************************ + * libc/math/lib_acosh.c + * + * Copyright (C) 2015 Brennan Ashton. All rights reserved. + * Author: Brennan Ashton + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include +#include + +#include + +/************************************************************************ + * Public Functions + ************************************************************************/ + +#ifdef CONFIG_HAVE_DOUBLE +double acosh(double x) +{ + return log(x + sqrt(x * x - 1)); +} +#endif diff --git a/libc/math/lib_acoshf.c b/libc/math/lib_acoshf.c new file mode 100644 index 0000000000..fa5c9549d8 --- /dev/null +++ b/libc/math/lib_acoshf.c @@ -0,0 +1,52 @@ +/************************************************************************ + * libc/math/lib_acoshf.c + * + * Copyright (C) 2015 Brennan Ashton. All rights reserved. + * Author: Brennan Ashton + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include +#include + +#include + +/************************************************************************ + * Public Functions + ************************************************************************/ + +float acoshf(float x) +{ + return logf(x + sqrtf(x * x - 1)); +} diff --git a/libc/math/lib_acoshl.c b/libc/math/lib_acoshl.c new file mode 100644 index 0000000000..bc2cd31da1 --- /dev/null +++ b/libc/math/lib_acoshl.c @@ -0,0 +1,54 @@ +/************************************************************************ + * libc/math/lib_acoshl.c + * + * Copyright (C) 2015 Brennan Ashton. All rights reserved. + * Author: Brennan Ashton + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include +#include + +#include + +/************************************************************************ + * Public Functions + ************************************************************************/ + +#ifdef CONFIG_HAVE_LONG_DOUBLE +long double acoshl(long double x) +{ + return logl(x + sqrtl(x * x - 1)); +} +#endif diff --git a/libc/math/lib_asinh.c b/libc/math/lib_asinh.c new file mode 100644 index 0000000000..7b573fcddd --- /dev/null +++ b/libc/math/lib_asinh.c @@ -0,0 +1,54 @@ +/************************************************************************ + * libc/math/lib_asinh.c + * + * Copyright (C) 2015 Brennan Ashton. All rights reserved. + * Author: Brennan Ashton + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include +#include + +#include + +/************************************************************************ + * Public Functions + ************************************************************************/ + +#ifdef CONFIG_HAVE_DOUBLE +double asinh(double x) +{ + return log(x + sqrt(x * x + 1)); +} +#endif diff --git a/libc/math/lib_asinhf.c b/libc/math/lib_asinhf.c new file mode 100644 index 0000000000..37141a65c4 --- /dev/null +++ b/libc/math/lib_asinhf.c @@ -0,0 +1,52 @@ +/************************************************************************ + * libc/math/lib_asinhf.c + * + * Copyright (C) 2015 Brennan Ashton. All rights reserved. + * Author: Brennan Ashton + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include +#include + +#include + +/************************************************************************ + * Public Functions + ************************************************************************/ + +float asinhf(float x) +{ + return logf(x + sqrtf(x * x + 1)); +} diff --git a/libc/math/lib_asinhl.c b/libc/math/lib_asinhl.c new file mode 100644 index 0000000000..b2fb201a38 --- /dev/null +++ b/libc/math/lib_asinhl.c @@ -0,0 +1,54 @@ +/************************************************************************ + * libc/math/lib_asinhl.c + * + * Copyright (C) 2015 Brennan Ashton. All rights reserved. + * Author: Brennan Ashton + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include +#include + +#include + +/************************************************************************ + * Public Functions + ************************************************************************/ + +#ifdef CONFIG_HAVE_LONG_DOUBLE +long double asinhl(long double x) +{ + return logl(x + sqrtl(x * x + 1)); +} +#endif diff --git a/libc/math/lib_atanh.c b/libc/math/lib_atanh.c new file mode 100644 index 0000000000..9932a5e9b6 --- /dev/null +++ b/libc/math/lib_atanh.c @@ -0,0 +1,54 @@ +/************************************************************************ + * libc/math/lib_atanh.c + * + * Copyright (C) 2015 Brennan Ashton. All rights reserved. + * Author: Brennan Ashton + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include +#include + +#include + +/************************************************************************ + * Public Functions + ************************************************************************/ + +#ifdef CONFIG_HAVE_DOUBLE +double atanh(double x) +{ + return 0.5 * log((1 + x) / (1 - x)); +} +#endif diff --git a/libc/math/lib_atanhf.c b/libc/math/lib_atanhf.c new file mode 100644 index 0000000000..a49ba995c5 --- /dev/null +++ b/libc/math/lib_atanhf.c @@ -0,0 +1,52 @@ +/************************************************************************ + * libc/math/lib_atanhf.c + * + * Copyright (C) 2015 Brennan Ashton. All rights reserved. + * Author: Brennan Ashton + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include +#include + +#include + +/************************************************************************ + * Public Functions + ************************************************************************/ + +float atanhf(float x) +{ + return 0.5 * logf((1 + x) / (1 - x)); +} diff --git a/libc/math/lib_atanhl.c b/libc/math/lib_atanhl.c new file mode 100644 index 0000000000..77a187e51b --- /dev/null +++ b/libc/math/lib_atanhl.c @@ -0,0 +1,54 @@ +/************************************************************************ + * libc/math/lib_atanhl.c + * + * Copyright (C) 2015 Brennan Ashton. All rights reserved. + * Author: Brennan Ashton + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include +#include + +#include + +/************************************************************************ + * Public Functions + ************************************************************************/ + +#ifdef CONFIG_HAVE_DOUBLE +long double atanhl(long double x) +{ + return 0.5 * logl((1 + x) / (1 - x)); +} +#endif