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    @stdlib/number-float32-base-from-word
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    0.0.6 • Public • Published

    fromWordf

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    Create a single-precision floating-point number from an unsigned integer corresponding to an IEEE 754 binary representation.

    Installation

    npm install @stdlib/number-float32-base-from-word

    Usage

    var fromWordf = require( '@stdlib/number-float32-base-from-word' );

    fromWordf( word )

    Creates a single-precision floating-point number from an unsigned integer corresponding to an IEEE 754 binary representation.

    var word = 1068180177; // => 0 01111111 01010110010001011010001
    
    var f32 = fromWordf( word ); // when printed, implicitly promoted to float64
    // returns 1.3370000123977661

    Notes

    • The equivalent of this function in C/C++,

      float fromWordf(unsigned int x) {
        return *(float*)&x;
      }

    Examples

    var randu = require( '@stdlib/random-base-randu' );
    var round = require( '@stdlib/math-base-special-round' );
    var MAX_UINT32 = require( '@stdlib/constants-uint32-max' );
    var fromWordf = require( '@stdlib/number-float32-base-from-word' );
    
    var word;
    var f32;
    var i;
    
    // Create single-precision floating-point numbers from unsigned integers...
    for ( i = 0; i < 1000; i++ ) {
        word = round( randu()*MAX_UINT32 );
        f32 = fromWordf( word );
        console.log( 'word: %d => float32: %d', word, f32 );
    }

    C APIs

    Usage

    #include "stdlib/number/float32/base/from_word.h"

    stdlib_base_float32_from_word( word, *x )

    Creates a single-precision floating-point number from an unsigned 32-bit integer corresponding to an IEEE 754 binary representation.

    #include <stdint.h>
    
    uint32_t word = 1078523331;
    
    float x;
    stdlib_base_float32_from_word( word, &x );

    The function accepts the following arguments:

    • word: [in] uint32_t input word.
    • x: [out] float* destination for a single-precision floating-point number.
    void stdlib_base_float32_from_word( const uint32_t word, float *x );

    Examples

    #include "stdlib/number/float32/base/from_word.h"
    #include <stdint.h>
    #include <stdio.h>
    
    int main() {
        uint32_t word = 1078523331;
    
        float x;
        int i;
        for ( i = 0; i < 10; i++ ) {
            stdlib_base_float32_from_word( word+(uint32_t)(i*10), &x );
            printf( "word: %u => %f\n", word, x );
        }
    }

    Notice

    This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

    For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

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    License

    See LICENSE.

    Copyright

    Copyright © 2016-2022. The Stdlib Authors.

    Install

    npm i @stdlib/number-float32-base-from-word

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    102

    Version

    0.0.6

    License

    Apache-2.0

    Unpacked Size

    48 kB

    Total Files

    15

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser