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    @stdlib/math-base-special-imul
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    0.0.6 • Public • Published

    imul

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    Perform C-like multiplication of two signed 32-bit integers.

    Installation

    npm install @stdlib/math-base-special-imul

    Usage

    var imul = require( '@stdlib/math-base-special-imul' );

    imul( a, b )

    Performs C-like multiplication of two signed 32-bit integers.

    var v = imul( -10|0, 4|0 );
    // returns -40
    
    v = imul( 1073741824|0, -5|0 ); // 2^30 * -5 = -5368709120 => 32-bit integer overflow
    // returns -1073741824

    Notes

    • The function emulates C-like multiplication of two signed 32-bit integers.

    Examples

    var discreteUniform = require( '@stdlib/random-base-discrete-uniform' ).factory;
    var INT32_MIN = require( '@stdlib/constants-int32-min' );
    var INT32_MAX = require( '@stdlib/constants-int32-max' );
    var imul = require( '@stdlib/math-base-special-imul' );
    
    var randi;
    var a;
    var b;
    var y;
    var i;
    
    randi = discreteUniform( INT32_MIN, INT32_MAX );
    
    for ( i = 0; i < 100; i++ ) {
        a = randi()|0;
        b = randi()|0;
        y = imul( a, b );
        console.log( '%d x %d = %d', a, b, y );
    }

    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 © 2016-2021. The Stdlib Authors.

    Install

    npm i @stdlib/math-base-special-imul

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    27

    Version

    0.0.6

    License

    Apache-2.0

    Unpacked Size

    39.6 kB

    Total Files

    10

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser