@stdlib/constants-float64-high-word-abs-mask
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High word mask for excluding the sign bit of a double-precision floating-point number.
@stdlib/constants-float64-high-word-abs-mask is a package that provides a constant for the high word mask used to isolate the absolute value of a double-precision floating-point number. This is useful in low-level bit manipulation tasks where you need to work with the binary representation of floating-point numbers.
High Word Absolute Mask
This feature provides the constant value for the high word absolute mask. The code sample demonstrates how to import the constant and log its value.
const ABS_MASK = require('@stdlib/constants-float64-high-word-abs-mask');
console.log(ABS_MASK); // 2147483647The 'bit-twiddle' package offers a variety of bit manipulation utilities, including functions for working with floating-point numbers at the binary level. It provides more general-purpose bit manipulation functions compared to the specific constant provided by @stdlib/constants-float64-high-word-abs-mask.
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High word mask for excluding the sign bit of a double-precision floating-point number.
npm install @stdlib/constants-float64-high-word-abs-mask
var FLOAT64_HIGH_WORD_ABS_MASK = require( '@stdlib/constants-float64-high-word-abs-mask' );
High word mask for excluding the sign bit of a double-precision floating-point number.
// 0x7fffffff = 2147483647 => 0 11111111111 11111111111111111111
var bool = ( FLOAT64_HIGH_WORD_ABS_MASK === 0x7fffffff );
// returns true
var getHighWord = require( '@stdlib/number-float64-base-get-high-word' );
var getLowWord = require( '@stdlib/number-float64-base-get-low-word' );
var fromWords = require( '@stdlib/number-float64-base-from-words' );
var FLOAT64_HIGH_WORD_ABS_MASK = require( '@stdlib/constants-float64-high-word-abs-mask' );
var x = -11.5;
var hi = getHighWord( x ); // 1 10000000010 01110000000000000000
// returns 3223781376
// Turn off the sign bit and leave other bits unchanged:
var out = hi & FLOAT64_HIGH_WORD_ABS_MASK; // 0 10000000010 01110000000000000000
// returns 1076297728
// Generate a new value:
out = fromWords( out, getLowWord( x ) );
// returns 11.5
#include "stdlib/constants/float64/high_word_abs_mask.h"
Macro for the high word mask for excluding the sign bit 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 excluding the sign bit of a double-precision floating-point number.
The npm package @stdlib/constants-float64-high-word-abs-mask receives a total of 290,375 weekly downloads. As such, @stdlib/constants-float64-high-word-abs-mask popularity was classified as popular.
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