@stdlib/math-base-ops-umul NPM

umul

$NPM version$ $Build Status$ $Coverage Status$

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

Installation

npm install @stdlib/math-base-ops-umul

Usage

var umul = require( '@stdlib/math-base-ops-umul' );

umul( a, b )

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

var v = umul( 10>>>0, 4>>>0 );
// returns 40

v = umul( 2147483648>>>0, 5>>>0 ); // 2^31 * 5 = 10737418240 => 32-bit integer overflow
// returns 2147483648

Notes

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

Examples

var discreteUniform = require( '@stdlib/random-base-discrete-uniform' ).factory;
var UINT32_MAX = require( '@stdlib/constants-uint32-max' );
var umul = require( '@stdlib/math-base-ops-umul' );

var randi;
var a;
var b;
var y;
var i;

randi = discreteUniform( 0, UINT32_MAX );

for ( i = 0; i < 100; i++ ) {
    a = randi()>>>0;
    b = randi()>>>0;
    y = umul( 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.