stdlib-js
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FLOAT64_HIGH_WORD_EXPONENT_MASK
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
High word mask for the exponent of a [double-precision floating-point number][ieee754].
bash
npm install @stdlib/constants-float64-high-word-exponent-mask
javascript
var FLOAT64_HIGH_WORD_EXPONENT_MASK = require( '@stdlib/constants-float64-high-word-exponent-mask' );
#### FLOAT64_HIGH_WORD_EXPONENT_MASK
High word mask for the exponent of a [double-precision floating-point number][ieee754].
javascript
// 0x7ff00000 = 2146435072 => 0 11111111111 00000000000000000000
var bool = ( FLOAT64_HIGH_WORD_EXPONENT_MASK === 0x7ff00000 );
// returns true
javascript
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
c
#include "stdlib/constants/float64/high_word_exponent_mask.h"
#### STDLIB_CONSTANT_FLOAT64_HIGH_WORD_EXPONENT_MASK
Macro for the high word mask for the exponent of a [double-precision floating-point number][ieee754].
@stdlib/constants-float64/high-word-significand-mask][@stdlib/constants/float64/high-word-significand-mask]: high word mask for the significand of a double-precision floating-point number.
