main.js (1451B)
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 Uint32Array = require( '@stdlib/array/uint32' ); 24 var Float32Array = require( '@stdlib/array/float32' ); 25 26 27 // VARIABLES // 28 29 var UINT32_VIEW = new Uint32Array( 1 ); 30 var FLOAT32_VIEW = new Float32Array( UINT32_VIEW.buffer ); 31 32 33 // MAIN // 34 35 /** 36 * Creates a single-precision floating-point number from an unsigned integer corresponding to an IEEE 754 binary representation. 37 * 38 * @param {uinteger32} word - unsigned integer 39 * @returns {number} single-precision floating-point number 40 * 41 * @example 42 * var word = 1068180177; // => 0 01111111 01010110010001011010001 43 * 44 * var f32 = fromWordf( word ); // when printed, implicitly promoted to float64 45 * // returns 1.3370000123977661 46 */ 47 function fromWordf( word ) { 48 UINT32_VIEW[ 0 ] = word; 49 return FLOAT32_VIEW[ 0 ]; 50 } 51 52 53 // EXPORTS // 54 55 module.exports = fromWordf;