time-to-botec

Benchmark sampling in different programming languages
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main.js (2730B)

      1 /**
      2 * @license Apache-2.0
      3 *
      4 * Copyright (c) 2020 The Stdlib Authors.
      5 *
      6 * Licensed under the Apache License, Version 2.0 (the "License");
      7 * you may not use this file except in compliance with the License.
      8 * You may obtain a copy of the License at
      9 *
     10 *    http://www.apache.org/licenses/LICENSE-2.0
     11 *
     12 * Unless required by applicable law or agreed to in writing, software
     13 * distributed under the License is distributed on an "AS IS" BASIS,
     14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15 * See the License for the specific language governing permissions and
     16 * limitations under the License.
     17 */
     18 
     19 'use strict';
     20 
     21 // MAIN //
     22 
     23 /**
     24 * Applies a quaternary callback to strided input array elements and assigns results to elements in a strided output array.
     25 *
     26 * @param {ArrayLikeObject<Collection>} arrays - array-like object containing four input arrays and one output array
     27 * @param {NonNegativeIntegerArray} shape - array-like object containing a single element, the number of indexed elements
     28 * @param {IntegerArray} strides - array-like object containing the stride lengths for the input and output arrays
     29 * @param {Callback} fcn - quaternary callback
     30 * @returns {void}
     31 *
     32 * @example
     33 * var Float64Array = require( '@stdlib/array/float64' );
     34 *
     35 * function add( x, y, z, w ) {
     36 *     return x + y + z + w;
     37 * }
     38 *
     39 * var x = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
     40 * var y = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
     41 * var z = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
     42 * var w = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
     43 * var u = new Float64Array( x.length );
     44 *
     45 * var shape = [ x.length ];
     46 * var strides = [ 1, 1, 1, 1, 1 ];
     47 *
     48 * quaternary( [ x, y, z, w, u ], shape, strides, add );
     49 *
     50 * console.log( u );
     51 * // => <Float64Array>[ 4.0, 8.0, 12.0, 16.0, 20.0 ]
     52 */
     53 function quaternary( arrays, shape, strides, fcn ) {
     54 	var sx;
     55 	var sy;
     56 	var sz;
     57 	var sw;
     58 	var su;
     59 	var ix;
     60 	var iy;
     61 	var iz;
     62 	var iw;
     63 	var iu;
     64 	var x;
     65 	var y;
     66 	var z;
     67 	var w;
     68 	var u;
     69 	var N;
     70 	var i;
     71 
     72 	N = shape[ 0 ];
     73 	if ( N <= 0 ) {
     74 		return;
     75 	}
     76 	sx = strides[ 0 ];
     77 	sy = strides[ 1 ];
     78 	sz = strides[ 2 ];
     79 	sw = strides[ 3 ];
     80 	su = strides[ 4 ];
     81 	if ( sx < 0 ) {
     82 		ix = (1-N) * sx;
     83 	} else {
     84 		ix = 0;
     85 	}
     86 	if ( sy < 0 ) {
     87 		iy = (1-N) * sy;
     88 	} else {
     89 		iy = 0;
     90 	}
     91 	if ( sz < 0 ) {
     92 		iz = (1-N) * sz;
     93 	} else {
     94 		iz = 0;
     95 	}
     96 	if ( sw < 0 ) {
     97 		iw = (1-N) * sw;
     98 	} else {
     99 		iw = 0;
    100 	}
    101 	if ( su < 0 ) {
    102 		iu = (1-N) * su;
    103 	} else {
    104 		iu = 0;
    105 	}
    106 	x = arrays[ 0 ];
    107 	y = arrays[ 1 ];
    108 	z = arrays[ 2 ];
    109 	w = arrays[ 3 ];
    110 	u = arrays[ 4 ];
    111 	for ( i = 0; i < N; i++ ) {
    112 		u[ iu ] = fcn( x[ ix ], y[ iy ], z[ iz ], w[ iw ] );
    113 		ix += sx;
    114 		iy += sy;
    115 		iz += sz;
    116 		iw += sw;
    117 		iu += su;
    118 	}
    119 }
    120 
    121 
    122 // EXPORTS //
    123 
    124 module.exports = quaternary;