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

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  • License Apache-2.0

Create a single-precision floating-point number from an unsigned integer corresponding to an IEEE 754 binary representation.

Package Exports

  • @stdlib/number-float32-base-from-word
  • @stdlib/number-float32-base-from-word/lib/index.js

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-from-word) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

fromWordf

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Create a single-precision floating-point number from an unsigned integer corresponding to an IEEE 754 binary representation.

Installation

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

Usage

var fromWordf = require( '@stdlib/number-float32-base-from-word' );

fromWordf( word )

Creates a single-precision floating-point number from an unsigned integer corresponding to an IEEE 754 binary representation.

var word = 1068180177; // => 0 01111111 01010110010001011010001

var f32 = fromWordf( word ); // when printed, implicitly promoted to float64
// returns 1.3370000123977661

Notes

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

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

Examples

var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var MAX_UINT32 = require( '@stdlib/constants-uint32-max' );
var fromWordf = require( '@stdlib/number-float32-base-from-word' );

var word;
var f32;
var i;

// Create single-precision floating-point numbers from unsigned integers...
for ( i = 0; i < 1000; i++ ) {
    word = round( randu()*MAX_UINT32 );
    f32 = fromWordf( word );
    console.log( 'word: %d => float32: %d', word, f32 );
}

C APIs

Usage

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

stdlib_base_float32_from_word( word, *x )

Creates a single-precision floating-point number from an unsigned 32-bit integer corresponding to an IEEE 754 binary representation.

#include <stdint.h>

uint32_t word = 1078523331;

float x;
stdlib_base_float32_from_word( word, &x );

The function accepts the following arguments:

  • word: [in] uint32_t input word.
  • x: [out] float* destination for a single-precision floating-point number.
void stdlib_base_float32_from_word( const uint32_t word, float *x );

Examples

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

int main() {
    uint32_t word = 1078523331;

    float x;
    int i;
    for ( i = 0; i < 10; i++ ) {
        stdlib_base_float32_from_word( word+(uint32_t)(i*10), &x );
        printf( "word: %u => %f\n", word, x );
    }
}

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 © 2016-2022. The Stdlib Authors.