polyfill.js (1242B)
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 'use strict'; 20 21 // MODULES // 22 23 var Float32Array = require( '@stdlib/array/float32' ); 24 25 26 // VARIABLES // 27 28 var FLOAT32_VIEW = new Float32Array( 1 ); 29 30 31 // MAIN // 32 33 /** 34 * Converts a double-precision floating-point number to the nearest single-precision floating-point number. 35 * 36 * @param {number} x - double-precision floating-point number 37 * @returns {number} nearest single-precision floating-point number 38 * 39 * @example 40 * var y = float64ToFloat32( 1.337 ); 41 * // returns 1.3370000123977661 42 */ 43 function float64ToFloat32( x ) { 44 FLOAT32_VIEW[ 0 ] = x; 45 return FLOAT32_VIEW[ 0 ]; 46 } 47 48 49 // EXPORTS // 50 51 module.exports = float64ToFloat32;