evalpoly.js (2520B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 /* 20 * This script compiles modules for evaluating polynomial functions. If any polynomial coefficients change, this script should be rerun to update the compiled files. 21 */ 22 'use strict'; 23 24 // MODULES // 25 26 var resolve = require( 'path' ).resolve; 27 var writeFileSync = require( '@stdlib/fs/write-file' ).sync; 28 var licenseHeader = require( '@stdlib/_tools/licenses/header' ); 29 var compile = require( './../../../../base/tools/evalpoly-compile' ); 30 31 32 // VARIABLES // 33 34 // Polynomial coefficients ordered in ascending degree... 35 var T_ODD = [ 36 1.33333333333201242699e-01, // T1 => 3FC11111, 1110FE7A 37 2.18694882948595424599e-02, // T3 => 3FABA1BA, 1BB341FE 38 3.59207910759131235356e-03, // T5 => 3F6D6D22, C9560328 39 5.88041240820264096874e-04, // T7 => 3F4344D8, F2F26501 40 7.81794442939557092300e-05, // T9 => 3F147E88, A03792A6 41 -1.85586374855275456654e-05 // T11 => BEF375CB, DB605373 42 ]; 43 var T_EVEN = [ 44 5.39682539762260521377e-02, // T2 => 3FABA1BA, 1BB341FE 45 8.86323982359930005737e-03, // T4 => 3F8226E3, E96E8493 46 1.45620945432529025516e-03, // T6 => 3F57DBC8, FEE08315 47 2.46463134818469906812e-04, // T8 => 3F3026F7, 1A8D1068 48 7.14072491382608190305e-05, // T10 => 3F12B80F, 32F0A7E9 49 2.59073051863633712884e-05 // T12 => 3EFB2A70, 74BF7AD4 50 ]; 51 52 // Header to add to output files: 53 var header = licenseHeader( 'Apache-2.0', 'js', { 54 'year': ( new Date() ).getFullYear(), 55 'copyright': 'The Stdlib Authors' 56 }); 57 header += '\n/* This is a generated file. Do not edit directly. */\n'; 58 59 60 // MAIN // 61 62 /** 63 * Main execution sequence. 64 * 65 * @private 66 */ 67 function main() { 68 var fpath; 69 var opts; 70 var str; 71 72 opts = { 73 'encoding': 'utf8' 74 }; 75 76 fpath = resolve( __dirname, '..', 'lib', 'polyval_t_odd.js' ); 77 str = header + compile( T_ODD ); 78 writeFileSync( fpath, str, opts ); 79 80 fpath = resolve( __dirname, '..', 'lib', 'polyval_t_even.js' ); 81 str = header + compile( T_EVEN ); 82 writeFileSync( fpath, str, opts ); 83 } 84 85 main();