README.md

toBinaryString

Return a string giving the literal bit representation of a half-precision floating-point number.

Usage

var toBinaryString = require( '@stdlib/number/float16/base/to-binary-string' );

toBinaryString( x )

Returns a string giving the literal bit representation of a half-precision floating-point number.

var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );

var str = toBinaryString( toFloat16( 4.0 ) );
// returns '0100010000000000'

str = toBinaryString( toFloat16( 3.1415926 ) );
// returns '0100001001001000'

str = toBinaryString( toFloat16( -1.0e3 ) );
// returns '1110001111010000'

The function handles subnormals.

var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );

var str = toBinaryString( toFloat16( -3.14e-6 ) );
// returns '1000000000110101'

str = toBinaryString( toFloat16( 1.4e-7 ) );
// returns '0000000000000010'

The function handles special values.

var PINF = require( '@stdlib/constants/float16/pinf' );
var NINF = require( '@stdlib/constants/float16/ninf' );

var str = toBinaryString( 0.0 );
// returns '0000000000000000'

str = toBinaryString( -0.0 );
// returns '1000000000000000'

str = toBinaryString( NaN );
// returns '0111111000000000'

str = toBinaryString( PINF );
// returns '0111110000000000'

str = toBinaryString( NINF );
// returns '1111110000000000'

Examples

var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var pow = require( '@stdlib/math/base/special/pow' );
var float64ToFloat16 = require( '@stdlib/number/float64/base/to-float16' );
var toBinaryString = require( '@stdlib/number/float16/base/to-binary-string' );

var frac;
var sign;
var exp;
var b;
var x;
var i;

// Convert random numbers to literal bit representations...
for ( i = 0; i < 100; i++ ) {
    if ( randu() < 0.5 ) {
        sign = -1.0;
    } else {
        sign = 1.0;
    }
    frac = randu() * 10.0;
    exp = round( randu()*10.0 );
    if ( randu() < 0.5 ) {
        exp = -exp;
    }
    x = sign * frac * pow( 2.0, exp );
    x = float64ToFloat16( x );
    b = toBinaryString( x );
    console.log( b );
}