1 /* $OpenBSD: invtrig.c,v 1.1 2008/12/09 20:00:35 martynas Exp $ */ 2 /*- 3 * Copyright (c) 2008 David Schultz <das@FreeBSD.ORG> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include "invtrig.h" 29 30 /* 31 * asinl() and acosl() 32 */ 33 const long double 34 pS0 = 1.66666666666666666631e-01L, 35 pS1 = -4.16313987993683104320e-01L, 36 pS2 = 3.69068046323246813704e-01L, 37 pS3 = -1.36213932016738603108e-01L, 38 pS4 = 1.78324189708471965733e-02L, 39 pS5 = -2.19216428382605211588e-04L, 40 pS6 = -7.10526623669075243183e-06L, 41 qS1 = -2.94788392796209867269e+00L, 42 qS2 = 3.27309890266528636716e+00L, 43 qS3 = -1.68285799854822427013e+00L, 44 qS4 = 3.90699412641738801874e-01L, 45 qS5 = -3.14365703596053263322e-02L; 46 47 /* 48 * atanl() 49 */ 50 const long double atanhi[] = { 51 4.63647609000806116202e-01L, 52 7.85398163397448309628e-01L, 53 9.82793723247329067960e-01L, 54 1.57079632679489661926e+00L, 55 }; 56 57 const long double atanlo[] = { 58 1.18469937025062860669e-20L, 59 -1.25413940316708300586e-20L, 60 2.55232234165405176172e-20L, 61 -2.50827880633416601173e-20L, 62 }; 63 64 const long double aT[] = { 65 3.33333333333333333017e-01L, 66 -1.99999999999999632011e-01L, 67 1.42857142857046531280e-01L, 68 -1.11111111100562372733e-01L, 69 9.09090902935647302252e-02L, 70 -7.69230552476207730353e-02L, 71 6.66661718042406260546e-02L, 72 -5.88158892835030888692e-02L, 73 5.25499891539726639379e-02L, 74 -4.70119845393155721494e-02L, 75 4.03539201366454414072e-02L, 76 -2.91303858419364158725e-02L, 77 1.24822046299269234080e-02L, 78 }; 79 80 const long double pi_lo = -5.01655761266833202345e-20L; 81