@stdlib/constants-float64-high-word-exponent-mask
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High word mask for the exponent of a double-precision floating-point number.
@stdlib/constants-float64-high-word-exponent-mask is a package that provides a constant representing the mask for the exponent bits of a double-precision floating-point number (float64). This is useful in low-level bit manipulation tasks, particularly when working with the IEEE 754 standard for floating-point arithmetic.
Accessing the Exponent Mask
This feature allows you to access the constant value representing the exponent mask for a double-precision floating-point number. The mask can be used in bitwise operations to isolate or manipulate the exponent bits of a float64 number.
const EXPONENT_MASK = require('@stdlib/constants-float64-high-word-exponent-mask');
console.log(EXPONENT_MASK); // 2146435072The math-float64-exponent package provides utilities for extracting the exponent of a double-precision floating-point number. While it focuses on extracting the exponent, @stdlib/constants-float64-high-word-exponent-mask provides the mask itself for more general bitwise operations.
The bit-twiddle package offers a variety of bit manipulation utilities, including functions for working with floating-point numbers. It is more general-purpose compared to @stdlib/constants-float64-high-word-exponent-mask, which specifically provides the exponent mask constant.
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High word mask for the exponent of a double-precision floating-point number.
npm install @stdlib/constants-float64-high-word-exponent-mask
var FLOAT64_HIGH_WORD_EXPONENT_MASK = require( '@stdlib/constants-float64-high-word-exponent-mask' );
High word mask for the exponent of a double-precision floating-point number.
// 0x7ff00000 = 2146435072 => 0 11111111111 00000000000000000000
var bool = ( FLOAT64_HIGH_WORD_EXPONENT_MASK === 0x7ff00000 );
// returns true
var getHighWord = require( '@stdlib/number-float64-base-get-high-word' );
var FLOAT64_HIGH_WORD_EXPONENT_MASK = require( '@stdlib/constants-float64-high-word-exponent-mask' );
var x = 11.5;
var hi = getHighWord( x ); // 0 10000000010 01110000000000000000
// returns 1076297728
// Mask off all bits except for the exponent bits:
var out = hi & FLOAT64_HIGH_WORD_EXPONENT_MASK; // 0 10000000010 00000000000000000000
// returns 1075838976
// Mask on the exponent bits and leave other bits unchanged:
out = hi | FLOAT64_HIGH_WORD_EXPONENT_MASK; // 0 11111111111 01110000000000000000
// returns 2146893824
#include "stdlib/constants/float64/high_word_exponent_mask.h"
Macro for the high word mask for the exponent of a double-precision floating-point number.
@stdlib/constants-float64/high-word-significand-mask: high word mask for the significand of a double-precision floating-point number.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.
See LICENSE.
Copyright © 2016-2024. The Stdlib Authors.
0.2.2 (2024-07-27)
No changes reported for this release.
</section> <!-- /.release --> <section class="release" id="v0.2.1">FAQs
High word mask for the exponent of a double-precision floating-point number.
The npm package @stdlib/constants-float64-high-word-exponent-mask receives a total of 214,501 weekly downloads. As such, @stdlib/constants-float64-high-word-exponent-mask popularity was classified as popular.
We found that @stdlib/constants-float64-high-word-exponent-mask demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 4 open source maintainers collaborating on the project.
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