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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-maskAlternatively,
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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- The higher order word of a double-precision floating-point number is a 32-bit integer containing the more significant bits which include the exponent and sign.
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.@stdlib/constants-float64/high-word-sign-mask: high word mask for the sign bit of a double-precision floating-point number.@stdlib/constants-float64/high-word-abs-mask: 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.
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