About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

toWord

Return an unsigned 16-bit integer corresponding to the IEEE 754 binary representation of a half-precision floating-point number.

Installation

npm install @stdlib/number-float16-base-to-word

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

var toWord = require( '@stdlib/number-float16-base-to-word' );

toWord( x )

Returns an unsigned 16-bit integer corresponding to the IEEE 754 binary representation of a half-precision floating-point number.

var float64ToFloat16 = require( '@stdlib/number-float64-base-to-float16' );

var f16 = float64ToFloat16( 1.05 );
// returns 1.0498046875

var w = toWord( f16 ); // => 0 01111 0000110011
// returns 15411

Examples

var float64ToFloat16 = require( '@stdlib/number-float64-base-to-float16' );
var uniform = require( '@stdlib/random-array-uniform' );
var map = require( '@stdlib/array-base-map' );
var naryFunction = require( '@stdlib/utils-nary-function' );
var pickArguments = require( '@stdlib/utils-pick-arguments' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var toWord = require( '@stdlib/number-float16-base-to-word' );

// Generate an array of random double-precision floating-point numbers:
var f64 = uniform( 1000, -50.0, 50.0 );

// Convert each value to a half-precision floating-point number:
var f16 = map( f64, naryFunction( float64ToFloat16, 1 ) );

// Convert half-precision floating-point numbers to integers representing the binary literal:
logEachMap( 'float64: %f => float16: %f => word: %d', f64, f16, pickArguments( toWord, [ 1 ] ) );

---

C APIs

Usage

#include "stdlib/number/float16/base/to_word.h"

stdlib_base_float16_to_word( x, *word )

Converts a half-precision floating-point number to an unsigned 16-bit integer corresponding to the number's IEEE 754 binary representation.

#include "stdlib/number/float16/ctor.h"
#include <stdint.h>

uint16_t word;

stdlib_float16_t x = stdlib_float16_from_bits( 51648 ); // => -11.5
stdlib_base_float16_to_word( x, &word );

The function accepts the following arguments:

• x: [in] stdlib_float16_t input value.
• word: [out] uint16_t* destination.

void stdlib_base_float16_to_word( const stdlib_float16_t x, uint16_t *word );

stdlib_base_float16_word_t

An opaque type definition for a union for converting between a half-precision floating-point number and an unsigned 16-bit integer.

#include "stdlib/number/float16/ctor.h"
#include <stdint.h>

stdlib_base_float16_word_t w;

// Assign a half-precision floating-point number:
w.value = stdlib_float16_from_bits( 51648 ); // => -11.5

// Retrieve the word:
uint16_t word = w.word;

The union has the following members:

• value: stdlib_float16_t half-precision floating-point number.
• word: uint16_t word.

Examples

#include "stdlib/number/float64/base/to_float16.h"
#include "stdlib/number/float16/base/to_word.h"
#include <stdint.h>
#include <stdio.h>

int main( void ) {
    const double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };

    stdlib_float16_t v;
    uint16_t word;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = stdlib_base_float64_to_float16( x[ i ] );
        stdlib_base_float16_to_word( v, &word );
        printf( "%lf => word: %u\n", x[ i ], word );
    }
}

---

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.

Community

---

License

See LICENSE.

Copyright

Copyright © 2016-2025. The Stdlib Authors.