time-to-botec

Benchmark sampling in different programming languages
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evalpoly.js (1992B)

      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 /*
     35 * Polynomial coefficients ordered in ascending degree.
     36 *
     37 * |1/cbrt(x) - p(x)| < 2**-23.5 (~[-7.93e-8, 7.929e-8])
     38 */
     39 var P = [
     40 	1.87595182427177009643,   // 0x3ffe03e6, 0x0f61e692
     41 	-1.88497979543377169875,  // 0xbffe28e0, 0x92f02420
     42 	1.621429720105354466140,  // 0x3ff9f160, 0x4a49d6c2
     43 	-0.758397934778766047437, // 0xbfe844cb, 0xbee751d9
     44 	0.145996192886612446982   // 0x3fc2b000, 0xd4e4edd7
     45 ];
     46 
     47 // Header to add to output files:
     48 var header = licenseHeader( 'Apache-2.0', 'js', {
     49 	'year': ( new Date() ).getFullYear(),
     50 	'copyright': 'The Stdlib Authors'
     51 });
     52 header += '\n/* This is a generated file. Do not edit directly. */\n';
     53 
     54 
     55 // MAIN //
     56 
     57 /**
     58 * Main execution sequence.
     59 *
     60 * @private
     61 */
     62 function main() {
     63 	var fpath;
     64 	var opts;
     65 	var str;
     66 
     67 	opts = {
     68 		'encoding': 'utf8'
     69 	};
     70 
     71 	fpath = resolve( __dirname, '..', 'lib', 'polyval_p.js' );
     72 	str = header + compile( P );
     73 	writeFileSync( fpath, str, opts );
     74 }
     75 
     76 main();