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      1 /*-
      2  * SPDX-License-Identifier: BSD-2-Clause
      3  *
      4  * Copyright (c) 2008 David Schultz <das (at) FreeBSD.ORG>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 #include "invtrig.h"
     31 
     32 /*
     33  * asinl() and acosl()
     34  */
     35 const long double
     36 pS0 =  1.66666666666666666631e-01L,
     37 pS1 = -4.16313987993683104320e-01L,
     38 pS2 =  3.69068046323246813704e-01L,
     39 pS3 = -1.36213932016738603108e-01L,
     40 pS4 =  1.78324189708471965733e-02L,
     41 pS5 = -2.19216428382605211588e-04L,
     42 pS6 = -7.10526623669075243183e-06L,
     43 qS1 = -2.94788392796209867269e+00L,
     44 qS2 =  3.27309890266528636716e+00L,
     45 qS3 = -1.68285799854822427013e+00L,
     46 qS4 =  3.90699412641738801874e-01L,
     47 qS5 = -3.14365703596053263322e-02L;
     48 
     49 /*
     50  * atanl()
     51  */
     52 const long double atanhi[] = {
     53 	 4.63647609000806116202e-01L,
     54 	 7.85398163397448309628e-01L,
     55 	 9.82793723247329067960e-01L,
     56 	 1.57079632679489661926e+00L,
     57 };
     58 
     59 const long double atanlo[] = {
     60 	 1.18469937025062860669e-20L,
     61 	-1.25413940316708300586e-20L,
     62 	 2.55232234165405176172e-20L,
     63 	-2.50827880633416601173e-20L,
     64 };
     65 
     66 const long double aT[] = {
     67 	 3.33333333333333333017e-01L,
     68 	-1.99999999999999632011e-01L,
     69 	 1.42857142857046531280e-01L,
     70 	-1.11111111100562372733e-01L,
     71 	 9.09090902935647302252e-02L,
     72 	-7.69230552476207730353e-02L,
     73 	 6.66661718042406260546e-02L,
     74 	-5.88158892835030888692e-02L,
     75 	 5.25499891539726639379e-02L,
     76 	-4.70119845393155721494e-02L,
     77 	 4.03539201366454414072e-02L,
     78 	-2.91303858419364158725e-02L,
     79 	 1.24822046299269234080e-02L,
     80 };
     81 
     82 const long double pi_lo = -5.01655761266833202345e-20L;
     83