significandf

Return an integer corresponding to the significand of a single-precision floating-point number.

Usage

var significandf = require( '@stdlib/number/float32/base/significand' );

significandf( x )

Returns an integer corresponding to the significand of a single-precision floating-point number.

var toFloat32 = require( '@stdlib/number/float64/base/to-float32' );

var s = significandf( toFloat32( 3.14e34 ) ); // => 10000011000010001110111
// returns 4293751

s = significandf( toFloat32( 3.14e-34 ) ); // => 10100001011000001010101
// returns 5288021

s = significandf( toFloat32( -3.14 ) ); // => 10010001111010111000011
// returns 4781507

s = significandf( 0.0 ); // => 00000000000000000000000
// returns 0

s = significandf( NaN ); // => 10000000000000000000000
// returns 4194304

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 toFloat32 = require( '@stdlib/number/float64/base/to-float32' );
var significandf = require( '@stdlib/number/float32/base/significand' );

var frac;
var exp;
var x;
var s;
var i;

// Generate random numbers and extract their significands...
for ( i = 0; i < 100; i++ ) {
    frac = randu() * 10.0;
    exp = round( randu()*44.0 ) - 22;
    x = frac * pow( 10.0, exp );
    x = toFloat32( x );
    s = significandf( x );
    console.log( 'x: %d. significand: %d.', x, s );
}

C APIs

Usage

#include "stdlib/number/float32/base/significand.h"

stdlib_base_float32_significand( x )

Returns an integer y corresponding to the significand of a single-precision floating-point number x.

#include <stdint.h>

int32_t y;
stdlib_base_float32_significand( 3.14f );

The function accepts the following arguments:

x: [in] float input value.

int32_t stdlib_base_float32_significand( const float x );

Examples

#include "stdlib/number/float32/base/significand.h"
#include <stdint.h>
#include <stdio.h>
#include <inttypes.h>

int main( void ) {
    float x[] = { 4.0f, 0.0f, -0.0f, 1.0f, -1.0f, 3.14f, -3.14f, 1.0e38f, -1.0e38f, 1.0f/0.0f, -1.0f/0.0f, 0.0f/0.0f };

    int32_t out;
    int i;
    for ( i = 0; i < 12; i++ ) {
        out = stdlib_base_float32_significand( x[ i ] );
        printf( "%f => %" PRId32 "\n", x[ i ], out );
    }
}