Press n or j to go to the next uncovered block, b, p or k for the previous block.
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* @license Apache-2.0
*
* Copyright (c) 2026 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 bytesPerElement = require( '@stdlib/ndarray/base/bytes-per-element' );
var defaults = require( './defaults.js' );
// MAIN //
/**
* Returns a loop block size for multi-dimensional array tiled loops.
*
* @param {*} dtypeX - first input array data type
* @param {*} dtypeY - second input array data type
* @param {*} dtypeZ - third input array data type
* @param {*} dtypeW - fourth input array data type
* @param {*} dtypeU - output array data type
* @returns {integer} block size (in units of elements)
*
* @example
* var bsize = quaternaryBlockSize( 'float64', 'float64', 'float64', 'float64', 'float64' );
* // returns <number>
*/
function quaternaryBlockSize( dtypeX, dtypeY, dtypeZ, dtypeW, dtypeU ) {
var nbx;
var nby;
var nbz;
var nbw;
var nbu;
var max;
nbx = bytesPerElement( dtypeX );
nby = bytesPerElement( dtypeY );
nbz = bytesPerElement( dtypeZ );
nbw = bytesPerElement( dtypeW );
nbu = bytesPerElement( dtypeU );
if (
nbx === null || nby === null ||
nbz === null || nbw === null ||
nbu === null
) { // e.g., "generic" arrays
return defaults.BLOCK_SIZE_IN_ELEMENTS;
}
// Find the largest element size among all four arrays...
max = nbx;
if ( nby > max ) {
max = nby;
}
if ( nbz > max ) {
max = nbz;
}
if ( nbw > max ) {
max = nbw;
}
if ( nbu > max ) {
max = nbu;
}
return ( defaults.BLOCK_SIZE_IN_BYTES/max )|0; // asm type annotation
}
// EXPORTS //
module.exports = quaternaryBlockSize;
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