Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 5007x 5007x 5007x 5007x 5007x 5007x 5007x 5007x 5007x 5007x 1x 1x 1x 1x 1x | /**
* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var getWord = require( '@stdlib/number/float16/base/to-word' );
var BIAS = require( '@stdlib/constants/float16/exponent-bias' );
var FLOAT16_EXPONENT_MASK = require( '@stdlib/constants/float16/exponent-mask' );
// MAIN //
/**
* Returns an integer corresponding to the unbiased exponent of a half-precision floating-point number.
*
* @param {number} x - half-precision floating-point number
* @returns {integer8} unbiased exponent
*
* @example
* var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
*
* var exp = exponent( toFloat16( 3.14e4 ) ); // => 2**15 ~ 3.27e4
* // returns 15
*
* @example
* var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
*
* var exp = exponent( toFloat16( 3.14e-4 ) ); // => 2**-12 ~ 2.44e-4
* // returns -12
*
* @example
* var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
*
* var exp = exponent( toFloat16( -3.14 ) );
* // returns 1
*
* @example
* var exp = exponent( 0.0 );
* // returns -15
*
* @example
* var exp = exponent( NaN );
* // returns 16
*/
function exponent( x ) {
// Convert `x` to an unsigned 16-bit integer corresponding to the IEEE 754 binary representation:
var w = getWord( x );
// Apply a mask to isolate only the exponent bits and then shift off all bits which are part of the fraction:
w = ( w & FLOAT16_EXPONENT_MASK ) >>> 10;
// Remove the bias and return:
return w - BIAS;
}
// EXPORTS //
module.exports = exponent;
|