npm package: @stdlib/constants-float16-sign-mask
Description: Mask for the sign bit of a half-precision floating-point number.
Author: The Stdlib Authors
Latest version: 0.1.1

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# FLOAT16_SIGN_MASK

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Mask for the sign bit of a [half-precision floating-point number][ieee754].

<section class="installation">

## Installation

```bash
npm install @stdlib/constants-float16-sign-mask
```

</section>

<section class="usage">

## Usage

<!-- eslint-disable id-length -->

```javascript
var FLOAT16_SIGN_MASK = require( '@stdlib/constants-float16-sign-mask' );
```

#### FLOAT16_SIGN_MASK

Mask for the sign bit of a [half-precision floating-point number][ieee754].

<!-- eslint-disable id-length -->

```javascript
// 0x8000 = 32768 => 1 00000 0000000000
var bool = ( FLOAT16_SIGN_MASK === 0x8000 );
// returns true
```

</section>

<!-- /.usage -->

<section class="notes">

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint-disable id-length -->

<!-- eslint no-undef: "error" -->

```javascript
var toWord = require( '@stdlib/number-float16-base-to-word' );
var FLOAT16_SIGN_MASK = require( '@stdlib/constants-float16-sign-mask' );

var x = -11.5;
var w = toWord( x ); // 1 10010 0111000000
// returns 51648

// Mask off all bits except for the sign bit:
var out = (w & FLOAT16_SIGN_MASK)>>>0; // 1 00000 0000000000
// returns 32768

// Turn off the sign bit and leave other bits unchanged:
out = w & (~FLOAT16_SIGN_MASK); // 0 10010 0111000000
// returns 18880
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

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<section class="intro">

</section>

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<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
#include "stdlib/constants/float16/sign_mask.h"
```

#### STDLIB_CONSTANT_FLOAT16_SIGN_MASK

Macro for the mask for the sign bit of a [half-precision floating-point number][ieee754].

</section>

<!-- /.usage -->

<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

<!-- /.notes -->

<!-- C API usage examples. -->

<section class="examples">

</section>

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</section>

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<section class="related">

</section>

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<section class="main-repo" >

* * *

## Notice

This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/constants-float16-sign-mask/main/LICENSE

[ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985

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