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@stdlib/number-float32-base-to-word

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  • License Apache-2.0

Return an unsigned 32-bit integer corresponding to the IEEE 754 binary representation of a single-precision floating-point number.

Package Exports

  • @stdlib/number-float32-base-to-word

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@stdlib/number-float32-base-to-word) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

toWord

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Return an unsigned 32-bit integer corresponding to the IEEE 754 binary representation of a single-precision floating-point number.

Installation

npm install @stdlib/number-float32-base-to-word

Usage

var toWordf = require( '@stdlib/number-float32-base-to-word' );

toWordf( x )

Returns an unsigned 32-bit integer corresponding to the IEEE 754 binary representation of a single-precision floating-point number.

var float64ToFloat32 = require( '@stdlib/number-float64-base-to-float32' );

var f32 = float64ToFloat32( 1.337 );
// returns 1.3370000123977661

var w = toWordf( f32 ); // => 0 01111111 01010110010001011010001
// returns 1068180177

Notes

  • The equivalent of this function in C/C++,

    unsigned int toWordf(float x) {
    return *(unsigned int*)&x;
}

Examples

var float64ToFloat32 = require( '@stdlib/number-float64-base-to-float32' );
var randu = require( '@stdlib/random-base-randu' );
var toWordf = require( '@stdlib/number-float32-base-to-word' );

var word;
var f64;
var f32;
var i;

// Convert single-precision floating-point numbers to integers representing the binary literal...
for ( i = 0; i < 1000; i++ ) {
    f64 = (randu()*100.0) - 50.0;
    f32 = float64ToFloat32( f64 );
    word = toWordf( f32 );
    console.log( 'float64: %d => float32: %d => word: %d', f64, f32, word );
}

C APIs

Installation

npm install @stdlib/number-float32-base-to-word

Usage

#include "stdlib/number/float32/base/to_word.h"

stdlib_base_float32_to_word( x, *word )

Converts a single-precision floating-point number to an unsigned 32-bit integer corresponding to the number's IEEE 754 binary representation.

#include <stdint.h>

uint32_t word;
stdlib_base_float32_to_word( 3.14f, &word );

The function accepts the following arguments:

  • x: [in] float input value.
  • word: [out] uint32_t* destination.
void stdlib_base_float32_to_word( const float x, uint32_t *word );

stdlib_base_float32_word_t

An opaque type definition for a union for converting between a single-precision floating-point number and an unsigned 32-bit integer.

#include <stdint.h>

stdlib_base_float32_word_t w;

// Assign a single-precision floating-point number:
w.value = 3.14f;

// Retrieve the word:
uint32_t word = w.word;

The union has the following members:

Examples

#include "stdlib/number/float32/base/to_word.h"
#include <stdint.h>
#include <stdio.h>

int main() {
    float x[] = { 3.14f, -3.14f, 0.0f, 0.0f/0.0f };

    uint32_t word;
    int i;
    for ( i = 0; i < 4; i++ ) {
        stdlib_base_float32_to_word( x[ i ], &word );
        printf( "%f => 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.

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License

See LICENSE.

Copyright © 2016-2021. The Stdlib Authors.