Mask for the sign bit of a half-precision floating-point number.
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> Mask for the sign bit of a [half-precision floating-point number][ieee754].
``bash`
npm install @stdlib/constants-float16-sign-mask
`javascript`
var FLOAT16_SIGN_MASK = require( '@stdlib/constants-float16-sign-mask' );
#### FLOAT16_SIGN_MASK
Mask for the sign bit of a [half-precision floating-point number][ieee754].
`javascript`
// 0x8000 = 32768 => 1 00000 0000000000
var bool = ( FLOAT16_SIGN_MASK === 0x8000 );
// returns true
`javascript
var toWord = require( '@stdlib/number-float16-base-to-word' );
var FLOAT16_SIGN_MASK = require( '@stdlib/constants-float16-sign-mask' );
var x = -11.5;
var w = toWord( x ); // 1 10010 0111000000
// returns 51648
// Mask off all bits except for the sign bit:
var out = (w & FLOAT16_SIGN_MASK)>>>0; // 1 00000 0000000000
// returns 32768
// Turn off the sign bit and leave other bits unchanged:
out = w & (~FLOAT16_SIGN_MASK); // 0 10010 0111000000
// returns 18880
`
*
`c`
#include "stdlib/constants/float16/sign_mask.h"
#### STDLIB_CONSTANT_FLOAT16_SIGN_MASK
Macro for the mask for the sign bit of a [half-precision floating-point number][ieee754].
*
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[ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985