math-float64-get-high-word

Returns a 32-bit integer corresponding to the more significant 32 bits of a double-precision floating-point number.

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High Word
!NPM versionnpm-imagenpm-url !Build Statusbuild-imagebuild-url !Coverage Statuscoverage-imagecoverage-url !Dependenciesdependencies-imagedependencies-url
Returns an unsigned 32-bit integer corresponding to the more significant 32 bits of a double-precision floating-point numberieee754.

Installation

$ npm install math-float64-get-high-word

Usage

var highWord = require( 'math-float64-get-high-word' );

highWord( x )

Returns an unsigned 32-bit integer corresponding to the more significant 32 bits of a double-precision floating-point numberieee754.
var w = highWord( 3.14e201 );
// returns 1774486211 => 01101001110001001000001011000011

Examples

var floor = require( 'math-floor' );
var pow = require( 'math-power' );
var highWord = require( 'math-float64-get-high-word' );

var frac;
var exp;
var w;
var x;
var i;

for ( i = 0; i < 100; i++ ) {
	frac = Math.random() * 10;
	exp = -floor( Math.random()*324 );
	x = frac * pow( 10, exp );
	w = highWord( x );
	console.log( 'x: %d. high word: %d.', x, w );
}

To run the example code from the top-level application directory,
$ node ./examples/index.js

Tests

Unit

This repository uses tapetape for unit tests. To run the tests, execute the following command in the top-level application directory:
$ make test

All new feature development should have corresponding unit tests to validate correct functionality.

Test Coverage

This repository uses Istanbulistanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:
$ make test-cov

Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,
$ make view-cov

Browser Support

This repository uses Testlingtestling for browser testing. To run the tests in a (headless) local web browser, execute the following command in the top-level application directory:
$ make test-browsers

To view the tests in a local web browser,
$ make view-browser-tests


License

MIT license.

Copyright

Copyright © 2016. The Compute.iocompute-io Authors.