feat: add missing kernels to ndarray/base/unary-reduce-subarray

lib/node_modules/@stdlib/ndarray/base/unary-reduce-subarray/lib/10_blocked_accessors.js

@@ -0,0 +1,394 @@
+/**
+* @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.
+*/
+
+/* eslint-disable max-depth, max-len */
+
+'use strict';
+
+// MODULES //
+
+var loopOrder = require( '@stdlib/ndarray/base/unary-loop-interchange-order' );
+var blockSize = require( '@stdlib/ndarray/base/unary-tiling-block-size' );
+var takeIndexed = require( '@stdlib/array/base/take-indexed' );
+var zeros = require( '@stdlib/array/base/zeros' );
+var incrementOffsets = require( './increment_offsets.js' );
+var setViewOffsets = require( './set_view_offsets.js' );
+var offsets = require( './offsets.js' );
+
+
+// MAIN //
+
+/**
+* Performs a reduction over an input ndarray and assigns results to a provided output ndarray via loop blocking.
+*
+* @private
+* @param {Function} fcn - reduction function
+* @param {Array<Object>} arrays - ndarrays
+* @param {Array<Object>} views - initialized ndarray-like objects representing sub-array views
+* @param {IntegerArray} strides - loop dimension strides for the input ndarray
+* @param {Options} opts - function options
+* @returns {void}
+*
+* @example
+* var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
+* var accessors = require( '@stdlib/array/base/accessors' );
+* var Float64Array = require( '@stdlib/array/float64' );
+* var filled = require( '@stdlib/array/base/filled' );
+* var ndarray2array = require( '@stdlib/ndarray/base/to-array' );
+* var base = require( '@stdlib/ndarray/base/every' );
+*
+* // Create data buffers:
+* var xbuf = toAccessorArray( new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 0.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0 ] ) );
+* var ybuf = toAccessorArray( filled( false, 3 ) );
+*
+* // Define the array shapes:
+* var xsh = [ 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 2, 2 ];
+* var ysh = [ 1, 1, 1, 1, 1, 1, 1, 1, 1, 3 ];
+*
+* // Define the array strides:
+* var sx = [ 12, 12, 12, 12, 12, 12, 12, 12, 12, 4, 2, 1 ];
+* var sy = [ 3, 3, 3, 3, 3, 3, 3, 3, 3, 1 ];
+*
+* // Define the index offsets:
+* var ox = 0;
+* var oy = 0;
+*
+* // Create an input ndarray-like object:
+* var x = {
+*     'dtype': 'float64',
+*     'data': xbuf,
+*     'shape': xsh,
+*     'strides': sx,
+*     'offset': ox,
+*     'order': 'row-major',
+*     'accessors': accessors( xbuf ).accessors
+* };
+*
+* // Create an output ndarray-like object:
+* var y = {
+*     'dtype': 'generic',
+*     'data': ybuf,
+*     'shape': ysh,
+*     'strides': sy,
+*     'offset': oy,
+*     'order': 'row-major',
+*     'accessors': accessors( ybuf ).accessors
+* };
+*
+* // Initialize ndarray-like objects representing sub-array views:
+* var views = [
+*     {
+*         'dtype': x.dtype,
+*         'data': x.data,
+*         'shape': [ 2, 2 ],
+*         'strides': [ 2, 1 ],
+*         'offset': x.offset,
+*         'order': x.order
+*     }
+* ];
+*
+* // Perform a reduction:
+* blockedunary10d( base, [ x, y ], views, [ 12, 12, 12, 12, 12, 12, 12, 12, 12, 4 ], {} );
+*
+* var arr = ndarray2array( y.data, y.shape, y.strides, y.offset, y.order );
+* // returns [ [ [ [ [ [ [ [ [ [ true, false, true ] ] ] ] ] ] ] ] ] ]
+*/
+function blockedunary10d( fcn, arrays, views, strides, opts ) { // eslint-disable-line max-statements, max-lines-per-function
+	var bsize;
+	var ybuf;
+	var set;
+	var dv0;
+	var dv1;
+	var dv2;
+	var dv3;
+	var dv4;
+	var dv5;
+	var dv6;
+	var dv7;
+	var dv8;
+	var dv9;
+	var ov1;
+	var ov2;
+	var ov3;
+	var ov4;
+	var ov5;
+	var ov6;
+	var ov7;
+	var ov8;
+	var ov9;
+	var sh;
+	var s0;
+	var s1;
+	var s2;
+	var s3;
+	var s4;
+	var s5;
+	var s6;
+	var s7;
+	var s8;
+	var s9;
+	var sv;
+	var ov;
+	var iv;
+	var i0;
+	var i1;
+	var i2;
+	var i3;
+	var i4;
+	var i5;
+	var i6;
+	var i7;
+	var i8;
+	var i9;
+	var j0;
+	var j1;
+	var j2;
+	var j3;
+	var j4;
+	var j5;
+	var j6;
+	var j7;
+	var j8;
+	var j9;
+	var N;
+	var x;
+	var y;
+	var o;
+	var k;
+
+	// Note on variable naming convention: S#, dv#, i#, j# where # corresponds to the loop number, with `0` being the innermost loop...
+
+	N = arrays.length;
+	x = arrays[ 0 ];
+	y = arrays[ 1 ];
+
+	// Resolve the loop interchange order:
+	o = loopOrder( y.shape, strides, y.strides );
+	sh = o.sh;
+	sv = [ o.sx, o.sy ];
+	for ( k = 2; k < N; k++ ) {
+		sv.push( takeIndexed( arrays[k].strides, o.idx ) );
+	}
+	// Determine the block size:
+	bsize = blockSize( x.dtype, y.dtype );
+
+	// Resolve a list of pointers to the first indexed elements in the respective ndarrays:
+	ov = offsets( arrays );
+
+	// Cache a reference to the output ndarray buffer:
+	ybuf = y.data;
+
+	// Cache accessors:
+	set = y.accessors[ 1 ];
+
+	// Cache offset increments for the innermost loop...
+	dv0 = [];
+	for ( k = 0; k < N; k++ ) {
+		dv0.push( sv[k][0] );
+	}
+	// Initialize loop variables...
+	ov1 = zeros( N );
+	ov2 = zeros( N );
+	ov3 = zeros( N );
+	ov4 = zeros( N );
+	ov5 = zeros( N );
+	ov6 = zeros( N );
+	ov7 = zeros( N );
+	ov8 = zeros( N );
+	ov9 = zeros( N );
+	dv1 = zeros( N );
+	dv2 = zeros( N );
+	dv3 = zeros( N );
+	dv4 = zeros( N );
+	dv5 = zeros( N );
+	dv6 = zeros( N );
+	dv7 = zeros( N );
+	dv8 = zeros( N );
+	dv9 = zeros( N );
+	iv = zeros( N );
+
+	// Iterate over blocks...
+	for ( j9 = sh[9]; j9 > 0; ) {
+		if ( j9 < bsize ) {
+			s9 = j9;
+			j9 = 0;
+		} else {
+			s9 = bsize;
+			j9 -= bsize;
+		}
+		for ( k = 0; k < N; k++ ) {
+			ov9[ k ] = ov[k] + ( j9*sv[k][9] );
+		}
+		for ( j8 = sh[8]; j8 > 0; ) {
+			if ( j8 < bsize ) {
+				s8 = j8;
+				j8 = 0;
+			} else {
+				s8 = bsize;
+				j8 -= bsize;
+			}
+			for ( k = 0; k < N; k++ ) {
+				dv9 = sv[k][9] - ( s8*sv[k][8] );
+				ov8[ k ] = ov9[k] + ( j8*sv[k][8] );
+			}
+			for ( j7 = sh[7]; j7 > 0; ) {
+				if ( j7 < bsize ) {
+					s7 = j7;
+					j7 = 0;
+				} else {
+					s7 = bsize;
+					j7 -= bsize;
+				}
+				for ( k = 0; k < N; k++ ) {
+					dv8 = sv[k][8] - ( s7*sv[k][7] );
+					ov7[ k ] = ov8[k] + ( j7*sv[k][7] );
+				}
+				for ( j6 = sh[6]; j6 > 0; ) {
+					if ( j6 < bsize ) {
+						s6 = j6;
+						j6 = 0;
+					} else {
+						s6 = bsize;
+						j6 -= bsize;
+					}
+					for ( k = 0; k < N; k++ ) {
+						dv7 = sv[k][7] - ( s6*sv[k][6] );
+						ov6[ k ] = ov7[k] + ( j6*sv[k][6] );
+					}
+					for ( j5 = sh[5]; j5 > 0; ) {
+						if ( j5 < bsize ) {
+							s5 = j5;
+							j5 = 0;
+						} else {
+							s5 = bsize;
+							j5 -= bsize;
+						}
+						for ( k = 0; k < N; k++ ) {
+							dv6 = sv[k][6] - ( s5*sv[k][5] );
+							ov5[ k ] = ov6[k] + ( j5*sv[k][5] );
+						}
+						for ( j4 = sh[4]; j4 > 0; ) {
+							if ( j4 < bsize ) {
+								s4 = j4;
+								j4 = 0;
+							} else {
+								s4 = bsize;
+								j4 -= bsize;
+							}
+							for ( k = 0; k < N; k++ ) {
+								dv5 = sv[k][5] - ( s4*sv[k][4] );
+								ov4[ k ] = ov5[k] + ( j4*sv[k][4] );
+							}
+							for ( j3 = sh[3]; j3 > 0; ) {
+								if ( j3 < bsize ) {
+									s3 = j3;
+									j3 = 0;
+								} else {
+									s3 = bsize;
+									j3 -= bsize;
+								}
+								for ( k = 0; k < N; k++ ) {
+									dv4[ k ] = sv[k][4] - ( s3*sv[k][3] );
+									ov3[ k ] = ov4[k] + ( j3*sv[k][3] );
+								}
+								for ( j2 = sh[2]; j2 > 0; ) {
+									if ( j2 < bsize ) {
+										s2 = j2;
+										j2 = 0;
+									} else {
+										s2 = bsize;
+										j2 -= bsize;
+									}
+									for ( k = 0; k < N; k++ ) {
+										dv3[ k ] = sv[k][3] - ( s2*sv[k][2] );
+										ov2[ k ] = ov3[k] + ( j2*sv[k][2] );
+									}
+									for ( j1 = sh[1]; j1 > 0; ) {
+										if ( j1 < bsize ) {
+											s1 = j1;
+											j1 = 0;
+										} else {
+											s1 = bsize;
+											j1 -= bsize;
+										}
+										for ( k = 0; k < N; k++ ) {
+											dv2[ k ] = sv[k][2] - ( s1*sv[k][1] );
+											ov1[ k ] = ov2[k] + ( j1*sv[k][1] );
+										}
+										for ( j0 = sh[0]; j0 > 0; ) {
+											if ( j0 < bsize ) {
+												s0 = j0;
+												j0 = 0;
+											} else {
+												s0 = bsize;
+												j0 -= bsize;
+											}
+											// Compute index offsets and loop offset increments for the first ndarray elements in the current block...
+											for ( k = 0; k < N; k++ ) {
+												iv[ k ] = ov1[k] + ( j0*sv[k][0] );
+												dv1[ k ] = sv[k][1] - ( s0*sv[k][0] );
+											}
+											// Iterate over the non-reduced ndarray dimensions...
+											for ( i9 = 0; i9 < s9; i9++ ) {
+												for ( i8 = 0; i8 < s8; i8++ ) {
+													for ( i7 = 0; i7 < s7; i7++ ) {
+														for ( i6 = 0; i6 < s6; i6++ ) {
+															for ( i5 = 0; i5 < s5; i5++ ) {
+																for ( i4 = 0; i4 < s4; i4++ ) {
+																	for ( i3 = 0; i3 < s3; i3++ ) {
+																		for ( i2 = 0; i2 < s2; i2++ ) {
+																			for ( i1 = 0; i1 < s1; i1++ ) {
+																				for ( i0 = 0; i0 < s0; i0++ ) {
+																					setViewOffsets( views, iv );
+																					set( ybuf, iv[ 1 ], fcn( views, opts ) );
+																					incrementOffsets( iv, dv0 );
+																				}
+																				incrementOffsets( iv, dv1 );
+																			}
+																			incrementOffsets( iv, dv2 );
+																		}
+																		incrementOffsets( iv, dv3 );
+																	}
+																	incrementOffsets( iv, dv4 );
+																}
+																incrementOffsets( iv, dv5 );
+															}
+															incrementOffsets( iv, dv6 );
+														}
+														incrementOffsets( iv, dv7 );
+													}
+													incrementOffsets( iv, dv8 );
+												}
+												incrementOffsets( iv, dv9 );
+											}
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
+
+// EXPORTS //
+
+module.exports = blockedunary10d;