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 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 | 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 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 412x 412x 2x 2x 412x 410x 412x 205x 205x 205x 205x 412x 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 absf = require( '@stdlib/math/base/special/absf' );
var PINF = require( '@stdlib/constants/float32/pinf' );
var f32 = require( '@stdlib/number/float64/base/to-float32' );
// VARIABLES //
var NEG_ONE = f32( -1.0 );
var ZERO = f32( 0.0 );
var ONE = f32( 1.0 );
// MAIN //
/**
* Evaluates the exponential function when \\( y = \pm \infty\\).
*
* @private
* @param {number} x - base
* @param {number} y - exponent
* @returns {number} function value
*
* @example
* var v = powf( -1.0, Infinity );
* // returns 1.0
*
* @example
* var v = powf( -1.0, -Infinity );
* // returns 1.0
*
* @example
* var v = powf( 1.0, Infinity );
* // returns 1.0
*
* @example
* var v = powf( 1.0, -Infinity );
* // returns 1.0
*
* @example
* var v = powf( 0.5, Infinity );
* // returns 0.0
*
* @example
* var v = powf( 0.5, -Infinity );
* // returns Infinity
*
* @example
* var v = powf( 1.5, -Infinity );
* // returns 0.0
*
* @example
* var v = powf( 1.5, Infinity );
* // returns Infinity
*/
function powf( x, y ) {
if ( x === NEG_ONE ) {
return ONE;
}
if ( x === ONE ) {
return ONE;
}
// (|x| > 1 && y === NINF) || (|x| < 1 && y === PINF)
if ( (absf(x) < ONE) === (y === PINF) ) {
return ZERO;
}
// (|x| > 1 && y === PINF) || (|x| < 1 && y === NINF)
return PINF;
}
// EXPORTS //
module.exports = powf;
|