diff --git a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/README.md b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/README.md
index 0fed89f9d951..70052bae0272 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/README.md
+++ b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/README.md
@@ -32,7 +32,7 @@ var gsort2ins = require( '@stdlib/blas/ext/base/gsort2ins' );
 
 #### gsort2ins( N, order, x, strideX, y, strideY )
 
-Simultaneously sorts two strided arrays based on the sort order of the first array `x` using insertion sort.
+Simultaneously sorts two strided arrays based on the sort order of the first array using insertion sort.
 
 ```javascript
 var x = [ 1.0, -2.0, 3.0, -4.0 ];
@@ -52,20 +52,17 @@ The function has the following parameters:
 -   **N**: number of indexed elements.
 -   **order**: sort order. If `order < 0.0`, the input strided array `x` is sorted in **decreasing** order. If `order > 0.0`, the input strided array `x` is sorted in **increasing** order. If `order == 0.0`, the input strided arrays are left unchanged.
 -   **x**: first input [`Array`][mdn-array] or [`typed array`][mdn-typed-array].
--   **strideX**: `x` index increment.
+-   **strideX**: stride length for `x`.
 -   **y**: second input [`Array`][mdn-array] or [`typed array`][mdn-typed-array].
--   **strideY**: `y` index increment.
+-   **strideY**: stride length for `y`.
 
-The `N` and `stride` parameters determine which elements in `x` and `y` are accessed at runtime. For example, to sort every other element
+The `N` and stride parameters determine which elements in the strided arrays are accessed at runtime. For example, to sort every other element:
 
 ```javascript
-var floor = require( '@stdlib/math/base/special/floor' );
-
 var x = [ 1.0, -2.0, 3.0, -4.0 ];
 var y = [ 0.0, 1.0, 2.0, 3.0 ];
-var N = floor( x.length / 2 );
 
-gsort2ins( N, -1.0, x, 2, y, 2 );
+gsort2ins( 2, -1.0, x, 2, y, 2 );
 
 console.log( x );
 // => [ 3.0, -2.0, 1.0, -4.0 ]
@@ -78,7 +75,6 @@ Note that indexing is relative to the first index. To introduce an offset, use [
 
 ```javascript
 var Float64Array = require( '@stdlib/array/float64' );
-var floor = require( '@stdlib/math/base/special/floor' );
 
 // Initial arrays...
 var x0 = new Float64Array( [ 1.0, 2.0, 3.0, 4.0 ] );
@@ -87,10 +83,9 @@ var y0 = new Float64Array( [ 0.0, 1.0, 2.0, 3.0 ] );
 // Create offset views...
 var x1 = new Float64Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element
 var y1 = new Float64Array( y0.buffer, y0.BYTES_PER_ELEMENT*1 ); // start at 2nd element
-var N = floor( x0.length/2 );
 
 // Sort every other element...
-gsort2ins( N, -1.0, x1, 2, y1, 2 );
+gsort2ins( 2, -1.0, x1, 2, y1, 2 );
 
 console.log( x0 );
 // => <Float64Array>[ 1.0, 4.0, 3.0, 2.0 ]
@@ -101,7 +96,7 @@ console.log( y0 );
 
 #### gsort2ins.ndarray( N, order, x, strideX, offsetX, y, strideY, offsetY )
 
-Simultaneously sorts two strided arrays based on the sort order of the first array `x` using insertion sort and alternative indexing semantics.
+Simultaneously sorts two strided arrays based on the sort order of the first array using insertion sort and alternative indexing semantics.
 
 ```javascript
 var x = [ 1.0, -2.0, 3.0, -4.0 ];
@@ -118,10 +113,10 @@ console.log( y );
 
 The function has the following additional parameters:
 
--   **offsetX**: `x` starting index.
--   **offsetY**: `y` starting index.
+-   **offsetX**: starting index for `x`.
+-   **offsetY**: starting index for `y`.
 
-While [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying `buffer`, the `offset` parameter supports indexing semantics based on a starting index. For example, to access only the last three elements of `x`
+While [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying buffer, the offset parameters support indexing semantics based on starting indices. For example, to access only the last three elements:
 
 ```javascript
 var x = [ 1.0, -2.0, 3.0, -4.0, 5.0, -6.0 ];
@@ -145,6 +140,7 @@ console.log( y );
 ## Notes
 
 -   If `N <= 0` or `order == 0.0`, both functions leave `x` and `y` unchanged.
+-   Both functions support array-like objects having getter and setter accessors for array element access (e.g., [`@stdlib/array/base/accessor`][@stdlib/array/base/accessor])
 -   The algorithm distinguishes between `-0` and `+0`. When sorted in increasing order, `-0` is sorted before `+0`. When sorted in decreasing order, `-0` is sorted after `+0`.
 -   The algorithm sorts `NaN` values to the end. When sorted in increasing order, `NaN` values are sorted last. When sorted in decreasing order, `NaN` values are sorted first.
 -   The algorithm has space complexity `O(1)` and worst case time complexity `O(N^2)`.
@@ -164,30 +160,15 @@ console.log( y );
 <!-- eslint no-undef: "error" -->
 
 ```javascript
-var round = require( '@stdlib/math/base/special/round' );
-var randu = require( '@stdlib/random/base/randu' );
-var Float64Array = require( '@stdlib/array/float64' );
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
 var gsort2ins = require( '@stdlib/blas/ext/base/gsort2ins' );
 
-var rand;
-var sign;
-var x;
-var y;
-var i;
-
-x = new Float64Array( 10 );
-y = new Float64Array( 10 ); // index array
-for ( i = 0; i < x.length; i++ ) {
-    rand = round( randu()*100.0 );
-    sign = randu();
-    if ( sign < 0.5 ) {
-        sign = -1.0;
-    } else {
-        sign = 1.0;
-    }
-    x[ i ] = sign * rand;
-    y[ i ] = i;
-}
+var x = discreteUniform( 10, -100, 100, {
+    'dtype': 'float64'
+});
+var y = discreteUniform( 10, -100, 100, {
+    'dtype': 'float64'
+});
 console.log( x );
 console.log( y );
 
@@ -224,6 +205,8 @@ console.log( y );
 
 [mdn-typed-array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray
 
+[@stdlib/array/base/accessor]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/array/base/accessor
+
 <!-- <related-links> -->
 
 [@stdlib/blas/ext/base/dsort2ins]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/blas/ext/base/dsort2ins
diff --git a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/repl.txt b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/repl.txt
index c9c9169fc7e4..8028f06e8445 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/repl.txt
+++ b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/repl.txt
@@ -3,8 +3,8 @@
     Simultaneously sorts two strided arrays based on the sort order of the first
     array using insertion sort.
 
-    The `N` and `stride` parameters determine which elements in `x` and `y` are
-    accessed at runtime.
+    The `N` and stride parameters determine which elements in the strided arrays
+    are accessed at runtime.
 
     Indexing is relative to the first index. To introduce an offset, use typed
     array views.
@@ -46,13 +46,13 @@
         First input array.
 
     strideX: integer
-        Index increment for `x`.
+        Stride length for `x`.
 
     y: Array<number>|TypedArray
         Second input array.
 
     strideY: integer
-        Index increment for `y`.
+        Stride length for `y`.
 
     Returns
     -------
@@ -69,11 +69,10 @@
     > y
     [ 3.0, 1.0, 0.0, 2.0 ]
 
-    // Using `N` and `stride` parameters:
+    // Using `N` and stride parameters:
     > x = [ 1.0, -2.0, 3.0, -4.0 ];
     > y = [ 0.0, 1.0, 2.0, 3.0 ];
-    > var N = {{alias:@stdlib/math/base/special/floor}}( x.length / 2 );
-    > {{alias}}( N, -1, x, 2, y, 2 )
+    > {{alias}}( 2, -1, x, 2, y, 2 )
     [ 3.0, -2.0, 1.0, -4.0 ]
     > y
     [ 2.0, 1.0, 0.0, 3.0 ]
@@ -83,21 +82,21 @@
     > var x1 = new {{alias:@stdlib/array/float64}}( x0.buffer, x0.BYTES_PER_ELEMENT*1 );
     > var y0 = new {{alias:@stdlib/array/float64}}( [ 0.0, 1.0, 2.0, 3.0 ] );
     > var y1 = new {{alias:@stdlib/array/float64}}( y0.buffer, y0.BYTES_PER_ELEMENT*1 );
-    > N = {{alias:@stdlib/math/base/special/floor}}( x0.length / 2 );
-    > {{alias}}( N, 1, x1, 2, y1, 2 )
+    > {{alias}}( 2, 1, x1, 2, y1, 2 )
     <Float64Array>[ -4.0, 3.0, -2.0 ]
     > x0
     <Float64Array>[ 1.0, -4.0, 3.0, -2.0 ]
     > y0
     <Float64Array>[ 0.0, 3.0, 2.0, 1.0 ]
 
+
 {{alias}}.ndarray( N, order, x, strideX, offsetX, y, strideY, offsetY )
     Simultaneously sorts two strided arrays based on the sort order of the first
     array using insertion sort and alternative indexing semantics.
 
     While typed array views mandate a view offset based on the underlying
-    buffer, the `offset` parameter supports indexing semantics based on a
-    starting index.
+    buffer, the offset parameters support indexing semantics based on starting
+    indices.
 
     Parameters
     ----------
@@ -112,19 +111,19 @@
         First input array.
 
     strideX: integer
-        Index increment for `x`.
+        Stride length for `x`.
 
     offsetX: integer
-        Starting index of `x`.
+        Starting index for `x`.
 
     y: Array<number>|TypedArray
         Second input array.
 
     strideY: integer
-        Index increment for `y`.
+        Stride length for `y`.
 
     offsetY: integer
-        Starting index of `y`.
+        Starting index for `y`.
 
     Returns
     -------
@@ -144,8 +143,7 @@
     // Using an index offset:
     > x = [ 1.0, -2.0, 3.0, -4.0 ];
     > y = [ 0.0, 1.0, 2.0, 3.0 ];
-    > var N = {{alias:@stdlib/math/base/special/floor}}( x.length / 2 );
-    > {{alias}}.ndarray( N, 1, x, 2, 1, y, 2, 1 )
+    > {{alias}}.ndarray( 2, 1, x, 2, 1, y, 2, 1 )
     [ 1.0, -4.0, 3.0, -2.0 ]
     > y
     [ 0.0, 3.0, 2.0, 1.0 ]
diff --git a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/types/index.d.ts b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/types/index.d.ts
index 8a2e5afec015..819aeb10da70 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/types/index.d.ts
@@ -20,7 +20,12 @@
 
 /// <reference types="@stdlib/types"/>
 
-import { NumericArray } from '@stdlib/types/array';
+import { NumericArray, Collection, AccessorArrayLike } from '@stdlib/types/array';
+
+/**
+* Input array.
+*/
+type InputArray = NumericArray | Collection<number> | AccessorArrayLike<number>;
 
 /**
 * Interface describing `gsort2ins`.
@@ -32,9 +37,9 @@ interface Routine {
 	* @param N - number of indexed elements
 	* @param order - sort order
 	* @param x - first input array
-	* @param strideX - `x` stride length
+	* @param strideX - stride length for `x`
 	* @param y - second input array
-	* @param strideY - `y` stride length
+	* @param strideY - stride length for `y`
 	* @returns `x`
 	*
 	* @example
@@ -49,7 +54,7 @@ interface Routine {
 	* console.log( y );
 	* // => [ 3.0, 1.0, 0.0, 2.0 ]
 	*/
-	( N: number, order: number, x: NumericArray, strideX: number, y: NumericArray, strideY: number ): NumericArray;
+	<T extends InputArray>( N: number, order: number, x: InputArray, strideX: number, y: T, strideY: number ): T;
 
 	/**
 	* Simultaneously sorts two strided arrays based on the sort order of the first array using insertion sort and alternative indexing semantics.
@@ -57,11 +62,11 @@ interface Routine {
 	* @param N - number of indexed elements
 	* @param order - sort order
 	* @param x - first input array
-	* @param strideX - `x` stride length
-	* @param offsetX - `x` starting index
+	* @param strideX - stride length for `x`
+	* @param offsetX - starting index for `x`
 	* @param y - second input array
-	* @param strideY - `y` stride length
-	* @param offsetY - `y` starting index
+	* @param strideY - stride length for `y`
+	* @param offsetY - starting index for `y`
 	* @returns `x`
 	*
 	* @example
@@ -76,7 +81,7 @@ interface Routine {
 	* console.log( y );
 	* // => [ 3.0, 1.0, 0.0, 2.0 ]
 	*/
-	ndarray( N: number, order: number, x: NumericArray, strideX: number, offsetX: number, y: NumericArray, strideY: number, offsetY: number ): NumericArray;
+	ndarray<T extends InputArray>( N: number, order: number, x: InputArray, strideX: number, offsetX: number, y: T, strideY: number, offsetY: number ): T;
 }
 
 /**
@@ -85,9 +90,9 @@ interface Routine {
 * @param N - number of indexed elements
 * @param order - sort order
 * @param x - first input array
-* @param strideX - `x` stride length
+* @param strideX - stride length for `x`
 * @param y - second input array
-* @param strideY - `y` stride length
+* @param strideY - stride length for `y`
 * @returns `x`
 *
 * @example
diff --git a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/types/test.ts b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/types/test.ts
index dc45e90ad325..bba8d9cb06ec 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/types/test.ts
+++ b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/docs/types/test.ts
@@ -16,6 +16,7 @@
 * limitations under the License.
 */
 
+import AccessorArray = require( '@stdlib/array/base/accessor' );
 import gsort2ins = require( './index' );
 
 
@@ -26,7 +27,8 @@ import gsort2ins = require( './index' );
 	const x = new Float64Array( 10 );
 	const y = new Float64Array( 10 );
 
-	gsort2ins( x.length, 1, x, 1, y, 1 ); // $ExpectType NumericArray
+	gsort2ins( x.length, 1, x, 1, y, 1 ); // $ExpectType Float64Array
+	gsort2ins( x.length, 1, new AccessorArray( x ), 1, new AccessorArray( y ), 1 ); // $ExpectType AccessorArray<number>
 }
 
 // The compiler throws an error if the function is provided a first argument which is not a number...
@@ -139,7 +141,8 @@ import gsort2ins = require( './index' );
 	const x = new Float64Array( 10 );
 	const y = new Float64Array( 10 );
 
-	gsort2ins.ndarray( x.length, 1, x, 1, 0, y, 1, 0 ); // $ExpectType NumericArray
+	gsort2ins.ndarray( x.length, 1, x, 1, 0, y, 1, 0 ); // $ExpectType Float64Array
+	gsort2ins.ndarray( x.length, 1, new AccessorArray( x ), 1, 0, new AccessorArray( y ), 1, 0 ); // $ExpectType AccessorArray<number>
 }
 
 // The compiler throws an error if the `ndarray` method is provided a first argument which is not a number...
diff --git a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/examples/index.js b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/examples/index.js
index b891c8102b60..52e067121d13 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/examples/index.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/examples/index.js
@@ -18,34 +18,15 @@
 
 'use strict';
 
-var round = require( '@stdlib/math/base/special/round' );
-var randu = require( '@stdlib/random/base/randu' );
-var Float64Array = require( '@stdlib/array/float64' );
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
 var gsort2ins = require( './../lib' );
 
-var rand;
-var sign;
-var x;
-var y;
-var i;
-
-x = new Float64Array( 10 );
-y = new Float64Array( 10 ); // index array
-for ( i = 0; i < x.length; i++ ) {
-	if ( randu() < 0.2 ) {
-		x[ i ] = NaN;
-	} else {
-		rand = round( randu()*100.0 );
-		sign = randu();
-		if ( sign < 0.5 ) {
-			sign = -1.0;
-		} else {
-			sign = 1.0;
-		}
-		x[ i ] = sign * rand;
-	}
-	y[ i ] = i;
-}
+var x = discreteUniform( 10, -100, 100, {
+	'dtype': 'float64'
+});
+var y = discreteUniform( 10, -100, 100, {
+	'dtype': 'float64'
+});
 console.log( x );
 console.log( y );
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/accessors.js b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/accessors.js
new file mode 100644
index 000000000000..b4a29ad39f25
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/accessors.js
@@ -0,0 +1,205 @@
+/**
+* @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 isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+
+
+// MAIN //
+
+/**
+* Simultaneously sorts two strided arrays based on the sort order of the first array using insertion sort.
+*
+* @private
+* @param {PositiveInteger} N - number of indexed elements
+* @param {number} order - sort order
+* @param {Object} x - first input array object
+* @param {Collection} x.data - first input array data
+* @param {Array<Function>} x.accessors - first input array element accessors
+* @param {integer} strideX - stride length for `x`
+* @param {NonNegativeInteger} offsetX - starting index for `x`
+* @param {Object} y - second input array object
+* @param {Collection} y.data - second input array data
+* @param {Array<Function>} y.accessors - second input array element accessors
+* @param {integer} strideY - stride length for `y`
+* @param {NonNegativeInteger} offsetY - starting index for `y`
+* @returns {Object} `x`
+*
+* @example
+* var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
+* var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
+*
+* var x = [ 1.0, -2.0, 3.0, -4.0 ];
+* var y = [ 0.0, 1.0, 2.0, 3.0 ];
+*
+* gsort2ins( x.length, 1.0, arraylike2object( toAccessorArray( x ) ), 1, 0, arraylike2object( toAccessorArray( y ) ), 1, 0 );
+*
+* console.log( x );
+* // => [ -4.0, -2.0, 1.0, 3.0 ]
+*
+* console.log( y );
+* // => [ 3.0, 1.0, 0.0, 2.0 ]
+*/
+function gsort2ins( N, order, x, strideX, offsetX, y, strideY, offsetY ) {
+	var xbuf;
+	var ybuf;
+	var xget;
+	var yget;
+	var xset;
+	var yset;
+	var flg;
+	var ix;
+	var jx;
+	var fx;
+	var lx;
+	var iy;
+	var jy;
+	var fy;
+	var ly;
+	var vx;
+	var vy;
+	var ux;
+	var i;
+
+	// Cache reference to array data:
+	xbuf = x.data;
+	ybuf = y.data;
+
+	// Cache reference to the element accessors:
+	xget = x.accessors[ 0 ];
+	xset = x.accessors[ 1 ];
+	yget = y.accessors[ 0 ];
+	yset = y.accessors[ 1 ];
+
+	// For a positive stride, sorting in decreasing order is equivalent to providing a negative stride and sorting in increasing order, and, for a negative stride, sorting in decreasing order is equivalent to providing a positive stride and sorting in increasing order...
+	if ( order < 0.0 ) {
+		strideX *= -1;
+		strideY *= -1;
+		offsetX -= (N-1) * strideX;
+		offsetY -= (N-1) * strideY;
+	}
+	fx = offsetX;              // first index
+	lx = fx + ((N-1)*strideX); // last index
+	ix = fx + strideX;
+
+	fy = offsetY;              // first index
+	ly = fy + ((N-1)*strideY); // last index
+	iy = fy + strideY;
+
+	if ( strideX < 0 ) {
+		// Traverse the strided array from right-to-left...
+
+		// Sort in increasing order...
+		for ( i = 1; i < N; i++ ) {
+			vx = xget( xbuf, ix );
+			vy = yget( ybuf, iy );
+
+			// Sort `NaN` values to the end (i.e., the left)...
+			if ( isnan( vx ) ) {
+				jx = ix;
+				jy = iy;
+
+				// Shift all values (including NaNs) to the left of the current element to the right...
+				while ( jx > lx ) {
+					xset( xbuf, jx, xget( xbuf, jx+strideX ) );
+					yset( ybuf, jy, yget( ybuf, jy+strideY ) );
+					jx += strideX;
+					jy += strideY;
+				}
+				xset( xbuf, lx, vx );
+				yset( ybuf, ly, vy );
+			} else {
+				flg = isNegativeZero( vx );
+				jx = ix - strideX;
+				jy = iy - strideY;
+
+				// Shift all larger values to the right of the current element to the left...
+				while ( jx <= fx ) {
+					ux = xget( xbuf, jx );
+					if ( ux <= vx && !(flg && ux === vx && isNegativeZero( ux ) === false) ) { // eslint-disable-line max-len
+						// Note: positive zeros (and NaNs (e.g., when last element is NaN)) are sorted to the left
+						break;
+					}
+					xset( xbuf, jx+strideX, ux );
+					yset( ybuf, jy+strideY, yget( ybuf, jy ) );
+					jx -= strideX;
+					jy -= strideY;
+				}
+				xset( xbuf, jx+strideX, vx );
+				yset( ybuf, jy+strideY, vy );
+				ix += strideX;
+				iy += strideY;
+			}
+		}
+		return x;
+	}
+	// Traverse the strided array from left-to-right...
+
+	// Sort in increasing order...
+	for ( i = 1; i < N; i++ ) {
+		vx = xget( xbuf, ix );
+		vy = yget( ybuf, iy );
+
+		// Sort `NaN` values to the end...
+		if ( isnan( vx ) ) {
+			jx = ix;
+			jy = iy;
+
+			// Shift all values (including NaNs) to the right of the current element to the left...
+			while ( jx < lx ) {
+				xset( xbuf, jx, xget( xbuf, jx+strideX ) );
+				yset( ybuf, jy, yget( ybuf, jy+strideY ) );
+				jx += strideX;
+				jy += strideY;
+			}
+			xset( xbuf, lx, vx );
+			yset( ybuf, ly, vy );
+		} else {
+			flg = isNegativeZero( vx );
+			jx = ix - strideX;
+			jy = iy - strideY;
+
+			// Shift all larger values to the left of the current element to the right...
+			while ( jx >= fx ) {
+				ux = xget( xbuf, jx );
+				if ( ux <= vx && !(flg && ux === vx && isNegativeZero( ux ) === false) ) { // eslint-disable-line max-len
+					// Note: positive zeros (and NaNs (e.g., when first element is NaN)) are sorted to the right
+					break;
+				}
+				xset( xbuf, jx+strideX, ux );
+				yset( ybuf, jy+strideY, yget( ybuf, jy ) );
+				jx -= strideX;
+				jy -= strideY;
+			}
+			xset( xbuf, jx+strideX, vx );
+			yset( ybuf, jy+strideY, vy );
+			ix += strideX;
+			iy += strideY;
+		}
+	}
+	return x;
+}
+
+
+// EXPORTS //
+
+module.exports = gsort2ins;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/main.js b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/main.js
index 4ada068fc9a4..351558b682d3 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/main.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/main.js
@@ -20,8 +20,8 @@
 
 // MODULES //
 
-var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );
-var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var stride2offset = require( '@stdlib/strided/base/stride2offset' );
+var ndarray = require( './ndarray.js' );
 
 
 // MAIN //
@@ -32,9 +32,9 @@ var isnan = require( '@stdlib/math/base/assert/is-nan' );
 * @param {PositiveInteger} N - number of indexed elements
 * @param {number} order - sort order
 * @param {NumericArray} x - first input array
-* @param {integer} strideX - `x` index increment
+* @param {integer} strideX - stride length for `x`
 * @param {NumericArray} y - second input array
-* @param {integer} strideY - `y` index increment
+* @param {integer} strideY - stride length for `y`
 * @returns {NumericArray} `x`
 *
 * @example
@@ -50,135 +50,7 @@ var isnan = require( '@stdlib/math/base/assert/is-nan' );
 * // => [ 3.0, 1.0, 0.0, 2.0 ]
 */
 function gsort2ins( N, order, x, strideX, y, strideY ) {
-	var flg;
-	var ix;
-	var jx;
-	var fx;
-	var lx;
-	var iy;
-	var jy;
-	var fy;
-	var ly;
-	var vx;
-	var vy;
-	var ux;
-	var i;
-
-	if ( N <= 0 || order === 0.0 ) {
-		return x;
-	}
-	// For a positive stride, sorting in decreasing order is equivalent to providing a negative stride and sorting in increasing order, and, for a negative stride, sorting in decreasing order is equivalent to providing a positive stride and sorting in increasing order...
-	if ( order < 0.0 ) {
-		strideX *= -1;
-		strideY *= -1;
-	}
-	if ( strideY < 0 ) {
-		fy = (1-N) * strideY;
-		ly = 0;
-	} else {
-		fy = 0;
-		ly = (N-1) * strideY;
-	}
-	iy = fy + strideY;
-
-	if ( strideX < 0 ) {
-		// Traverse the strided array from right-to-left...
-		fx = (1-N) * strideX; // first index
-		lx = 0;               // last index
-		ix = fx + strideX;
-
-		// Sort in increasing order...
-		for ( i = 1; i < N; i++ ) {
-			vx = x[ ix ];
-			vy = y[ iy ];
-
-			// Sort `NaN` values to the end (i.e., the left)...
-			if ( isnan( vx ) ) {
-				jx = ix;
-				jy = iy;
-
-				// Shift all values (including NaNs) to the left of the current element to the right...
-				while ( jx > lx ) {
-					x[ jx ] = x[ jx+strideX ];
-					y[ jy ] = y[ jy+strideY ];
-					jx += strideX;
-					jy += strideY;
-				}
-				x[ lx ] = vx;
-				y[ ly ] = vy;
-			} else {
-				flg = isNegativeZero( vx );
-				jx = ix - strideX;
-				jy = iy - strideY;
-
-				// Shift all larger values to the right of the current element to the left...
-				while ( jx <= fx ) {
-					ux = x[ jx ];
-					if ( ux <= vx && !(flg && ux === vx && isNegativeZero( ux ) === false) ) { // eslint-disable-line max-len
-						// Note: positive zeros (and NaNs (e.g., when last element is NaN)) are sorted to the left
-						break;
-					}
-					x[ jx+strideX ] = ux;
-					y[ jy+strideY ] = y[ jy ];
-					jx -= strideX;
-					jy -= strideY;
-				}
-				x[ jx+strideX ] = vx;
-				y[ jy+strideY ] = vy;
-				ix += strideX;
-				iy += strideY;
-			}
-		}
-		return x;
-	}
-	// Traverse the strided array from left-to-right...
-	fx = 0;              // first index
-	lx = (N-1) * strideX; // last index
-	ix = fx + strideX;
-
-	// Sort in increasing order...
-	for ( i = 1; i < N; i++ ) {
-		vx = x[ ix ];
-		vy = y[ iy ];
-
-		// Sort `NaN` values to the end...
-		if ( isnan( vx ) ) {
-			jx = ix;
-			jy = iy;
-
-			// Shift all values (including NaNs) to the right of the current element to the left...
-			while ( jx < lx ) {
-				x[ jx ] = x[ jx+strideX ];
-				y[ jy ] = y[ jy+strideY ];
-				jx += strideX;
-				jy += strideY;
-			}
-			x[ lx ] = vx;
-			y[ ly ] = vy;
-		} else {
-			flg = isNegativeZero( vx );
-			jx = ix - strideX;
-			jy = iy - strideY;
-
-			// Shift all larger values to the left of the current element to the right...
-			while ( jx >= fx ) {
-				ux = x[ jx ];
-				if ( ux <= vx && !(flg && ux === vx && isNegativeZero( ux ) === false) ) { // eslint-disable-line max-len
-					// Note: positive zeros (and NaNs (e.g., when first element is NaN)) are sorted to the right
-					break;
-				}
-				x[ jx+strideX ] = ux;
-				y[ jy+strideY ] = y[ jy ];
-				jx -= strideX;
-				jy -= strideY;
-			}
-			x[ jx+strideX ] = vx;
-			y[ jy+strideY ] = vy;
-			ix += strideX;
-			iy += strideY;
-		}
-	}
-	return x;
+	return ndarray( N, order, x, strideX, stride2offset( N, strideX ), y, strideY, stride2offset( N, strideY ) ); // eslint-disable-line max-len
 }
 
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/ndarray.js b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/ndarray.js
index 6b27fa5d9326..e1a4a797eeeb 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/ndarray.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/lib/ndarray.js
@@ -20,8 +20,10 @@
 
 // MODULES //
 
+var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
 var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var accessors = require( './accessors.js' );
 
 
 // MAIN //
@@ -32,11 +34,11 @@ var isnan = require( '@stdlib/math/base/assert/is-nan' );
 * @param {PositiveInteger} N - number of indexed elements
 * @param {number} order - sort order
 * @param {NumericArray} x - first input array
-* @param {integer} strideX - `x` index increment
-* @param {NonNegativeInteger} offsetX - `x` starting index
+* @param {integer} strideX - stride length for `x`
+* @param {NonNegativeInteger} offsetX - starting index for `x`
 * @param {NumericArray} y - second input array
-* @param {integer} strideY - `y` index increment
-* @param {NonNegativeInteger} offsetY - `y` starting index
+* @param {integer} strideY - stride length for `y`
+* @param {NonNegativeInteger} offsetY - starting index for `y`
 * @returns {NumericArray} `x`
 *
 * @example
@@ -64,11 +66,19 @@ function gsort2ins( N, order, x, strideX, offsetX, y, strideY, offsetY ) {
 	var vx;
 	var vy;
 	var ux;
+	var ox;
+	var oy;
 	var i;
 
 	if ( N <= 0 || order === 0.0 ) {
 		return x;
 	}
+	ox = arraylike2object( x );
+	oy = arraylike2object( y );
+	if ( ox.accessorProtocol || oy.accessorProtocol ) {
+		accessors( N, order, ox, strideX, offsetX, oy, strideY, offsetY );
+		return x;
+	}
 	// For a positive stride, sorting in decreasing order is equivalent to providing a negative stride and sorting in increasing order, and, for a negative stride, sorting in decreasing order is equivalent to providing a positive stride and sorting in increasing order...
 	if ( order < 0.0 ) {
 		strideX *= -1;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/test/test.main.js b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/test/test.main.js
index 4dfb39814a16..aed24176d973 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/test/test.main.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/test/test.main.js
@@ -24,6 +24,7 @@ var tape = require( 'tape' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
 var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );
+var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
 var Float64Array = require( '@stdlib/array/float64' );
 var num2str = require( './fixtures/num2str.js' );
 var gsort2ins = require( './../lib' );
@@ -71,6 +72,35 @@ tape( 'the function sorts a strided array (increasing order)', function test( t
 	t.end();
 });
 
+tape( 'the function sorts a strided array (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 1.0, -1.0, 2.0, -2.0, 2.0, -3.0, 3.0, -3.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0 ];
+
+	expectedX = [ -3.0, -3.0, -2.0, -1.0, 1.0, 2.0, 2.0, 3.0 ];
+	expectedY = [ 5.0, 7.0, 3.0, 1.0, 0.0, 2.0, 4.0, 6.0 ];
+
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function sorts a strided array (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -100,6 +130,35 @@ tape( 'the function sorts a strided array (decreasing order)', function test( t
 	t.end();
 });
 
+tape( 'the function sorts a strided array (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 1.0, -1.0, 2.0, -2.0, 2.0, -3.0, 3.0, -3.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0 ];
+
+	expectedX = [ 3.0, 2.0, 2.0, 1.0, -1.0, -2.0, -3.0, -3.0 ];
+	expectedY = [ 6.0, 2.0, 4.0, 0.0, 1.0, 3.0, 5.0, 7.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function sorts a strided array which includes NaNs (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -129,6 +188,35 @@ tape( 'the function sorts a strided array which includes NaNs (increasing order)
 	t.end();
 });
 
+tape( 'the function sorts a strided array which includes NaNs (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 1.0, -1.0, 2.0, NaN, -2.0, 2.0, -3.0, 3.0, NaN, -3.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 ];
+
+	expectedX = [ -3.0, -3.0, -2.0, -1.0, 1.0, 2.0, 2.0, 3.0, NaN, NaN ];
+	expectedY = [ 6.0, 9.0, 4.0, 1.0, 0.0, 2.0, 5.0, 7.0, 3.0, 8.0 ];
+
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function sorts a strided array which includes NaNs (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -158,6 +246,35 @@ tape( 'the function sorts a strided array which includes NaNs (decreasing order)
 	t.end();
 });
 
+tape( 'the function sorts a strided array which includes NaNs (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 1.0, -1.0, 2.0, NaN, -2.0, 2.0, -3.0, 3.0, NaN, -3.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 ];
+
+	expectedX = [ NaN, NaN, 3.0, 2.0, 2.0, 1.0, -1.0, -2.0, -3.0, -3.0 ];
+	expectedY = [ 3.0, 8.0, 7.0, 2.0, 5.0, 0.0, 1.0, 4.0, 6.0, 9.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function sorts a strided array which includes positive and negative zeros (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -187,6 +304,35 @@ tape( 'the function sorts a strided array which includes positive and negative z
 	t.end();
 });
 
+tape( 'the function sorts a strided array which includes positive and negative zeros (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 0.0, -0.0, 0.0, -0.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0 ];
+
+	expectedX = [ -0.0, -0.0, 0.0, 0.0 ];
+	expectedY = [ 1.0, 3.0, 0.0, 2.0 ];
+
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function sorts a strided array which includes positive and negative zeros (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -216,7 +362,36 @@ tape( 'the function sorts a strided array which includes positive and negative z
 	t.end();
 });
 
-tape( 'the function sorts a strided array (increasing order; special cases)', function test( t ) {
+tape( 'the function sorts a strided array which includes positive and negative zeros (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 0.0, -0.0, 0.0, -0.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0 ];
+
+	expectedX = [ 0.0, 0.0, -0.0, -0.0 ];
+	expectedY = [ 0.0, 2.0, 1.0, 3.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
+tape( 'the function sorts a strided array (increasing order, special cases)', function test( t ) {
 	var expectedX;
 	var expectedY;
 	var x;
@@ -285,7 +460,76 @@ tape( 'the function sorts a strided array (increasing order; special cases)', fu
 	t.end();
 });
 
-tape( 'the function sorts a strided array (decreasing order; special cases)', function test( t ) {
+tape( 'the function sorts a strided array (increasing order, special cases, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ NaN, 1.0, -1.0, 2.0, 2.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
+
+	expectedX = [ -1.0, 1.0, 2.0, 2.0, NaN ];
+	expectedY = [ 2.0, 1.0, 3.0, 4.0, 0.0 ];
+
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+
+	x = [ 1.0, -1.0, 2.0, 2.0, NaN ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
+
+	expectedX = [ -1.0, 1.0, 2.0, 2.0, NaN ];
+	expectedY = [ 1.0, 0.0, 2.0, 3.0, 4.0 ];
+
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+
+	x = [ NaN, 1.0, -1.0, 2.0, 2.0, NaN ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ];
+
+	expectedX = [ -1.0, 1.0, 2.0, 2.0, NaN, NaN ];
+	expectedY = [ 2.0, 1.0, 3.0, 4.0, 0.0, 5.0 ];
+
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
+tape( 'the function sorts a strided array (decreasing order, special cases)', function test( t ) {
 	var expectedX;
 	var expectedY;
 	var x;
@@ -354,6 +598,75 @@ tape( 'the function sorts a strided array (decreasing order; special cases)', fu
 	t.end();
 });
 
+tape( 'the function sorts a strided array (decreasing order, special cases, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ NaN, 1.0, -1.0, 2.0, 2.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
+
+	expectedX = [ NaN, 2.0, 2.0, 1.0, -1.0 ];
+	expectedY = [ 0.0, 3.0, 4.0, 1.0, 2.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+
+	x = [ 1.0, -1.0, 2.0, 2.0, NaN ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
+
+	expectedX = [ NaN, 2.0, 2.0, 1.0, -1.0 ];
+	expectedY = [ 4.0, 2.0, 3.0, 0.0, 1.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+
+	x = [ NaN, 1.0, -1.0, 2.0, 2.0, NaN ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ];
+
+	expectedX = [ NaN, NaN, 2.0, 2.0, 1.0, -1.0 ];
+	expectedY = [ 0.0, 5.0, 3.0, 4.0, 1.0, 2.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function returns a reference to the first input array', function test( t ) {
 	var out;
 	var x;
@@ -368,6 +681,20 @@ tape( 'the function returns a reference to the first input array', function test
 	t.end();
 });
 
+tape( 'the function returns a reference to the first input array (accessors)', function test( t ) {
+	var out;
+	var x;
+	var y;
+
+	x = toAccessorArray( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
+	y = toAccessorArray( [ 0.0, 1.0, 2.0, 3.0, 4.0 ] );
+	out = gsort2ins( x.length, 1.0, x, 1, y, 1 );
+
+	t.strictEqual( out, x, 'same reference' );
+	t.notEqual( out, y, 'different reference' );
+	t.end();
+});
+
 tape( 'if provided an `N` parameter less than or equal to `0`, the function leaves `x` and `y` unchanged', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -391,6 +718,29 @@ tape( 'if provided an `N` parameter less than or equal to `0`, the function leav
 	t.end();
 });
 
+tape( 'if provided an `N` parameter less than or equal to `0`, the function leaves `x` and `y` unchanged (accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [ 3.0, -4.0, 1.0 ];
+	y = [ 0.0, 1.0, 2.0 ];
+
+	expectedX = [ 3.0, -4.0, 1.0 ];
+	expectedY = [ 0.0, 1.0, 2.0 ];
+
+	gsort2ins( 0, 1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+
+	gsort2ins( -4, 1.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+
+	t.end();
+});
+
 tape( 'if `order` equals `0`, the function leaves `x` and `y` unchanged', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -410,6 +760,25 @@ tape( 'if `order` equals `0`, the function leaves `x` and `y` unchanged', functi
 	t.end();
 });
 
+tape( 'if `order` equals `0`, the function leaves `x` and `y` unchanged (accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [ 3.0, -4.0, 1.0 ];
+	y = [ 0.0, 1.0, 2.0 ];
+
+	expectedX = [ 3.0, -4.0, 1.0 ];
+	expectedY = [ 0.0, 1.0, 2.0 ];
+
+	gsort2ins( x.length, 0.0, toAccessorArray( x ), 1, toAccessorArray( y ), 1 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+
+	t.end();
+});
+
 tape( 'the function supports specifying strides (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -451,6 +820,47 @@ tape( 'the function supports specifying strides (increasing order)', function te
 	t.end();
 });
 
+tape( 'the function supports specifying strides (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [
+		2.0,  // 0
+		-3.0,
+		-5.0, // 1
+		7.0,
+		6.0   // 2
+	];
+	y = [
+		0.0, // 0
+		1.0,
+		2.0, // 1
+		3.0,
+		4.0  // 2
+	];
+	expectedX = [
+		-5.0, // 0
+		-3.0,
+		2.0,  // 1
+		7.0,
+		6.0   // 2
+	];
+	expectedY = [
+		2.0, // 0
+		1.0,
+		0.0, // 1
+		3.0,
+		4.0  // 2
+	];
+
+	gsort2ins( 3, 1.0, toAccessorArray( x ), 2, toAccessorArray( y ), 2 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function supports specifying strides (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -492,6 +902,47 @@ tape( 'the function supports specifying strides (decreasing order)', function te
 	t.end();
 });
 
+tape( 'the function supports specifying strides (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [
+		2.0,  // 0
+		-3.0,
+		-5.0, // 1
+		7.0,
+		6.0   // 2
+	];
+	y = [
+		0.0, // 0
+		1.0,
+		2.0, // 1
+		3.0,
+		4.0  // 2
+	];
+	expectedX = [
+		6.0,  // 0
+		-3.0,
+		2.0,  // 1
+		7.0,
+		-5.0  // 2
+	];
+	expectedY = [
+		4.0, // 0
+		1.0,
+		0.0, // 1
+		3.0,
+		2.0  // 2
+	];
+
+	gsort2ins( 3, -1.0, toAccessorArray( x ), 2, toAccessorArray( y ), 2 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function supports specifying negative strides (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -533,6 +984,47 @@ tape( 'the function supports specifying negative strides (increasing order)', fu
 	t.end();
 });
 
+tape( 'the function supports specifying negative strides (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [
+		2.0,  // 2
+		-3.0,
+		-5.0, // 1
+		7.0,
+		6.0   // 0
+	];
+	y = [
+		4.0, // 2
+		3.0,
+		2.0, // 1
+		1.0,
+		0.0  // 0
+	];
+	expectedX = [
+		6.0,  // 2
+		-3.0,
+		2.0,  // 1
+		7.0,
+		-5.0  // 0
+	];
+	expectedY = [
+		0.0, // 2
+		3.0,
+		4.0, // 1
+		1.0,
+		2.0  // 0
+	];
+
+	gsort2ins( 3, 1.0, toAccessorArray( x ), -2, toAccessorArray( y ), -2 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function supports specifying negative strides (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -574,6 +1066,47 @@ tape( 'the function supports specifying negative strides (decreasing order)', fu
 	t.end();
 });
 
+tape( 'the function supports specifying negative strides (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [
+		2.0,  // 2
+		-3.0,
+		-5.0, // 1
+		7.0,
+		6.0   // 0
+	];
+	y = [
+		4.0, // 2
+		3.0,
+		2.0, // 1
+		1.0,
+		0.0  // 0
+	];
+	expectedX = [
+		-5.0, // 2
+		-3.0,
+		2.0,  // 1
+		7.0,
+		6.0   // 0
+	];
+	expectedY = [
+		2.0, // 2
+		3.0,
+		4.0, // 1
+		1.0,
+		0.0  // 0
+	];
+
+	gsort2ins( 3, -1.0, toAccessorArray( x ), -2, toAccessorArray( y ), -2 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function supports view offsets (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/test/test.ndarray.js b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/test/test.ndarray.js
index 8f946a289afe..07c9cd532eca 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/test/test.ndarray.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/gsort2ins/test/test.ndarray.js
@@ -24,6 +24,7 @@ var tape = require( 'tape' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
 var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );
+var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
 var num2str = require( './fixtures/num2str.js' );
 var gsort2ins = require( './../lib/ndarray.js' );
 
@@ -70,6 +71,35 @@ tape( 'the function sorts a strided array (increasing order)', function test( t
 	t.end();
 });
 
+tape( 'the function sorts a strided array (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 1.0, -1.0, 2.0, -2.0, 2.0, -3.0, 3.0, -3.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0 ];
+
+	expectedX = [ -3.0, -3.0, -2.0, -1.0, 1.0, 2.0, 2.0, 3.0 ];
+	expectedY = [ 5.0, 7.0, 3.0, 1.0, 0.0, 2.0, 4.0, 6.0 ];
+
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function sorts a strided array (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -99,6 +129,35 @@ tape( 'the function sorts a strided array (decreasing order)', function test( t
 	t.end();
 });
 
+tape( 'the function sorts a strided array (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 1.0, -1.0, 2.0, -2.0, 2.0, -3.0, 3.0, -3.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0 ];
+
+	expectedX = [ 3.0, 2.0, 2.0, 1.0, -1.0, -2.0, -3.0, -3.0 ];
+	expectedY = [ 6.0, 2.0, 4.0, 0.0, 1.0, 3.0, 5.0, 7.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function sorts a strided array which includes NaNs (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -128,6 +187,35 @@ tape( 'the function sorts a strided array which includes NaNs (increasing order)
 	t.end();
 });
 
+tape( 'the function sorts a strided array which includes NaNs (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 1.0, -1.0, 2.0, NaN, -2.0, 2.0, -3.0, 3.0, NaN, -3.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 ];
+
+	expectedX = [ -3.0, -3.0, -2.0, -1.0, 1.0, 2.0, 2.0, 3.0, NaN, NaN ];
+	expectedY = [ 6.0, 9.0, 4.0, 1.0, 0.0, 2.0, 5.0, 7.0, 3.0, 8.0 ];
+
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function sorts a strided array which includes NaNs (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -157,6 +245,35 @@ tape( 'the function sorts a strided array which includes NaNs (decreasing order)
 	t.end();
 });
 
+tape( 'the function sorts a strided array which includes NaNs (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 1.0, -1.0, 2.0, NaN, -2.0, 2.0, -3.0, 3.0, NaN, -3.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 ];
+
+	expectedX = [ NaN, NaN, 3.0, 2.0, 2.0, 1.0, -1.0, -2.0, -3.0, -3.0 ];
+	expectedY = [ 3.0, 8.0, 7.0, 2.0, 5.0, 0.0, 1.0, 4.0, 6.0, 9.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function sorts a strided array which includes positive and negative zeros (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -186,6 +303,35 @@ tape( 'the function sorts a strided array which includes positive and negative z
 	t.end();
 });
 
+tape( 'the function sorts a strided array which includes positive and negative zeros (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 0.0, -0.0, 0.0, -0.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0 ];
+
+	expectedX = [ -0.0, -0.0, 0.0, 0.0 ];
+	expectedY = [ 1.0, 3.0, 0.0, 2.0 ];
+
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
 tape( 'the function sorts a strided array which includes positive and negative zeros (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -215,7 +361,36 @@ tape( 'the function sorts a strided array which includes positive and negative z
 	t.end();
 });
 
-tape( 'the function sorts a strided array (increasing order; special cases)', function test( t ) {
+tape( 'the function sorts a strided array which includes positive and negative zeros (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ 0.0, -0.0, 0.0, -0.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0 ];
+
+	expectedX = [ 0.0, 0.0, -0.0, -0.0 ];
+	expectedY = [ 0.0, 2.0, 1.0, 3.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
+tape( 'the function sorts a strided array (increasing order, special cases)', function test( t ) {
 	var expectedX;
 	var expectedY;
 	var x;
@@ -284,7 +459,7 @@ tape( 'the function sorts a strided array (increasing order; special cases)', fu
 	t.end();
 });
 
-tape( 'the function sorts a strided array (decreasing order; special cases)', function test( t ) {
+tape( 'the function sorts a strided array (increasing order, special cases, accessors)', function test( t ) {
 	var expectedX;
 	var expectedY;
 	var x;
@@ -294,10 +469,10 @@ tape( 'the function sorts a strided array (decreasing order; special cases)', fu
 	x = [ NaN, 1.0, -1.0, 2.0, 2.0 ];
 	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
 
-	expectedX = [ NaN, 2.0, 2.0, 1.0, -1.0 ];
-	expectedY = [ 0.0, 3.0, 4.0, 1.0, 2.0 ];
+	expectedX = [ -1.0, 1.0, 2.0, 2.0, NaN ];
+	expectedY = [ 2.0, 1.0, 3.0, 4.0, 0.0 ];
 
-	gsort2ins( x.length, -1.0, x, 1, 0, y, 1, 0 );
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
 	for ( i = 0; i < expectedX.length; i++ ) {
 		if ( isnan( expectedX[ i ] ) ) {
 			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
@@ -314,10 +489,10 @@ tape( 'the function sorts a strided array (decreasing order; special cases)', fu
 	x = [ 1.0, -1.0, 2.0, 2.0, NaN ];
 	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
 
-	expectedX = [ NaN, 2.0, 2.0, 1.0, -1.0 ];
-	expectedY = [ 4.0, 2.0, 3.0, 0.0, 1.0 ];
+	expectedX = [ -1.0, 1.0, 2.0, 2.0, NaN ];
+	expectedY = [ 1.0, 0.0, 2.0, 3.0, 4.0 ];
 
-	gsort2ins( x.length, -1.0, x, 1, 0, y, 1, 0 );
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
 	for ( i = 0; i < expectedX.length; i++ ) {
 		if ( isnan( expectedX[ i ] ) ) {
 			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
@@ -334,10 +509,10 @@ tape( 'the function sorts a strided array (decreasing order; special cases)', fu
 	x = [ NaN, 1.0, -1.0, 2.0, 2.0, NaN ];
 	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ];
 
-	expectedX = [ NaN, NaN, 2.0, 2.0, 1.0, -1.0 ];
-	expectedY = [ 0.0, 5.0, 3.0, 4.0, 1.0, 2.0 ];
+	expectedX = [ -1.0, 1.0, 2.0, 2.0, NaN, NaN ];
+	expectedY = [ 2.0, 1.0, 3.0, 4.0, 0.0, 5.0 ];
 
-	gsort2ins( x.length, -1.0, x, 1, 0, y, 1, 0 );
+	gsort2ins( x.length, 1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
 	for ( i = 0; i < expectedX.length; i++ ) {
 		if ( isnan( expectedX[ i ] ) ) {
 			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
@@ -353,44 +528,219 @@ tape( 'the function sorts a strided array (decreasing order; special cases)', fu
 	t.end();
 });
 
-tape( 'the function returns a reference to the first input array', function test( t ) {
-	var out;
+tape( 'the function sorts a strided array (decreasing order, special cases)', function test( t ) {
+	var expectedX;
+	var expectedY;
 	var x;
 	var y;
+	var i;
 
-	x = [ 1.0, 2.0, 3.0, 4.0, 5.0 ];
+	x = [ NaN, 1.0, -1.0, 2.0, 2.0 ];
 	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
-	out = gsort2ins( x.length, 1.0, x, 1, 0, y, 1, 0 );
 
-	t.strictEqual( out, x, 'same reference' );
-	t.notEqual( out, y, 'different reference' );
-	t.end();
-});
+	expectedX = [ NaN, 2.0, 2.0, 1.0, -1.0 ];
+	expectedY = [ 0.0, 3.0, 4.0, 1.0, 2.0 ];
 
-tape( 'if provided an `N` parameter less than or equal to `0`, the function leaves `x` and `y` unchanged', function test( t ) {
-	var expectedX;
-	var expectedY;
-	var x;
-	var y;
+	gsort2ins( x.length, -1.0, x, 1, 0, y, 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
 
-	x = [ 3.0, -4.0, 1.0 ];
-	y = [ 0.0, 1.0, 2.0 ];
+	x = [ 1.0, -1.0, 2.0, 2.0, NaN ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
 
-	expectedX = [ 3.0, -4.0, 1.0 ];
-	expectedY = [ 0.0, 1.0, 2.0 ];
+	expectedX = [ NaN, 2.0, 2.0, 1.0, -1.0 ];
+	expectedY = [ 4.0, 2.0, 3.0, 0.0, 1.0 ];
 
-	gsort2ins( 0, 1.0, x, 1, 0, y, 1, 0 );
-	t.deepEqual( x, expectedX, 'returns expected value' );
-	t.deepEqual( y, expectedY, 'returns expected value' );
+	gsort2ins( x.length, -1.0, x, 1, 0, y, 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
 
-	gsort2ins( -4, 1.0, x, 1, 0, y, 1, 0 );
-	t.deepEqual( x, expectedX, 'returns expected value' );
-	t.deepEqual( y, expectedY, 'returns expected value' );
+	x = [ NaN, 1.0, -1.0, 2.0, 2.0, NaN ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ];
+
+	expectedX = [ NaN, NaN, 2.0, 2.0, 1.0, -1.0 ];
+	expectedY = [ 0.0, 5.0, 3.0, 4.0, 1.0, 2.0 ];
 
+	gsort2ins( x.length, -1.0, x, 1, 0, y, 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
 	t.end();
 });
 
-tape( 'if `order` equals `0`, the function leaves `x` and `y` unchanged', function test( t ) {
+tape( 'the function sorts a strided array (decreasing order, special cases, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+	var i;
+
+	x = [ NaN, 1.0, -1.0, 2.0, 2.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
+
+	expectedX = [ NaN, 2.0, 2.0, 1.0, -1.0 ];
+	expectedY = [ 0.0, 3.0, 4.0, 1.0, 2.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+
+	x = [ 1.0, -1.0, 2.0, 2.0, NaN ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
+
+	expectedX = [ NaN, 2.0, 2.0, 1.0, -1.0 ];
+	expectedY = [ 4.0, 2.0, 3.0, 0.0, 1.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+
+	x = [ NaN, 1.0, -1.0, 2.0, 2.0, NaN ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ];
+
+	expectedX = [ NaN, NaN, 2.0, 2.0, 1.0, -1.0 ];
+	expectedY = [ 0.0, 5.0, 3.0, 4.0, 1.0, 2.0 ];
+
+	gsort2ins( x.length, -1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	for ( i = 0; i < expectedX.length; i++ ) {
+		if ( isnan( expectedX[ i ] ) ) {
+			t.strictEqual( isnan( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		} else if ( isNegativeZero( expectedX[ i ] ) ) {
+			t.strictEqual( isNegativeZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+num2str( expectedX[i] )+'.' );
+		} else if ( isPositiveZero( expectedX[ i ] ) ) {
+			t.strictEqual( isPositiveZero( x[ i ] ), true, 'returns expected value. index: '+i+'. actual: '+num2str( x[i] )+'. expected: '+expectedX[i]+'.' );
+		} else {
+			t.strictEqual( x[ i ], expectedX[ i ], 'returns expected value. index: '+i+'. actual: '+x[i]+'. expected: '+expectedX[i]+'.' );
+		}
+		t.strictEqual( y[ i ], expectedY[ i ], 'returns expected value. index: '+i+'. actual: '+y[i]+'. expected: '+expectedY[i]+'.' );
+	}
+	t.end();
+});
+
+tape( 'the function returns a reference to the first input array', function test( t ) {
+	var out;
+	var x;
+	var y;
+
+	x = [ 1.0, 2.0, 3.0, 4.0, 5.0 ];
+	y = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
+	out = gsort2ins( x.length, 1.0, x, 1, 0, y, 1, 0 );
+
+	t.strictEqual( out, x, 'same reference' );
+	t.notEqual( out, y, 'different reference' );
+	t.end();
+});
+
+tape( 'the function returns a reference to the first input array (accessors)', function test( t ) {
+	var out;
+	var x;
+	var y;
+
+	x = toAccessorArray( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
+	y = toAccessorArray( [ 0.0, 1.0, 2.0, 3.0, 4.0 ] );
+	out = gsort2ins( x.length, 1.0, x, 1, 0, y, 1, 0 );
+
+	t.strictEqual( out, x, 'same reference' );
+	t.notEqual( out, y, 'different reference' );
+	t.end();
+});
+
+tape( 'if provided an `N` parameter less than or equal to `0`, the function leaves `x` and `y` unchanged', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [ 3.0, -4.0, 1.0 ];
+	y = [ 0.0, 1.0, 2.0 ];
+
+	expectedX = [ 3.0, -4.0, 1.0 ];
+	expectedY = [ 0.0, 1.0, 2.0 ];
+
+	gsort2ins( 0, 1.0, x, 1, 0, y, 1, 0 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+
+	gsort2ins( -4, 1.0, x, 1, 0, y, 1, 0 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'if provided an `N` parameter less than or equal to `0`, the function leaves `x` and `y` unchanged (accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [ 3.0, -4.0, 1.0 ];
+	y = [ 0.0, 1.0, 2.0 ];
+
+	expectedX = [ 3.0, -4.0, 1.0 ];
+	expectedY = [ 0.0, 1.0, 2.0 ];
+
+	gsort2ins( 0, 1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+
+	gsort2ins( -4, 1.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'if `order` equals `0`, the function leaves `x` and `y` unchanged', function test( t ) {
 	var expectedX;
 	var expectedY;
 	var x;
@@ -409,6 +759,25 @@ tape( 'if `order` equals `0`, the function leaves `x` and `y` unchanged', functi
 	t.end();
 });
 
+tape( 'if `order` equals `0`, the function leaves `x` and `y` unchanged (accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [ 3.0, -4.0, 1.0 ];
+	y = [ 0.0, 1.0, 2.0 ];
+
+	expectedX = [ 3.0, -4.0, 1.0 ];
+	expectedY = [ 0.0, 1.0, 2.0 ];
+
+	gsort2ins( x.length, 0.0, toAccessorArray( x ), 1, 0, toAccessorArray( y ), 1, 0 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+
+	t.end();
+});
+
 tape( 'the function supports specifying strides (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -450,6 +819,47 @@ tape( 'the function supports specifying strides (increasing order)', function te
 	t.end();
 });
 
+tape( 'the function supports specifying strides (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [
+		2.0,  // 0
+		-3.0,
+		-5.0, // 1
+		7.0,
+		6.0   // 2
+	];
+	y = [
+		0.0, // 0
+		1.0,
+		2.0, // 1
+		3.0,
+		4.0  // 2
+	];
+	expectedX = [
+		-5.0, // 0
+		-3.0,
+		2.0,  // 1
+		7.0,
+		6.0   // 2
+	];
+	expectedY = [
+		2.0, // 0
+		1.0,
+		0.0, // 1
+		3.0,
+		4.0  // 2
+	];
+
+	gsort2ins( 3, 1.0, toAccessorArray( x ), 2, 0, toAccessorArray( y ), 2, 0 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function supports specifying strides (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -491,6 +901,47 @@ tape( 'the function supports specifying strides (decreasing order)', function te
 	t.end();
 });
 
+tape( 'the function supports specifying strides (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [
+		2.0,  // 0
+		-3.0,
+		-5.0, // 1
+		7.0,
+		6.0   // 2
+	];
+	y = [
+		0.0, // 0
+		1.0,
+		2.0, // 1
+		3.0,
+		4.0  // 2
+	];
+	expectedX = [
+		6.0,  // 0
+		-3.0,
+		2.0,  // 1
+		7.0,
+		-5.0  // 2
+	];
+	expectedY = [
+		4.0, // 0
+		1.0,
+		0.0, // 1
+		3.0,
+		2.0  // 2
+	];
+
+	gsort2ins( 3, -1.0, toAccessorArray( x ), 2, 0, toAccessorArray( y ), 2, 0 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function supports specifying negative strides (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -532,6 +983,47 @@ tape( 'the function supports specifying negative strides (increasing order)', fu
 	t.end();
 });
 
+tape( 'the function supports specifying negative strides (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [
+		2.0,  // 2
+		-3.0,
+		-5.0, // 1
+		7.0,
+		6.0   // 0
+	];
+	y = [
+		4.0, // 2
+		3.0,
+		2.0, // 1
+		1.0,
+		0.0  // 0
+	];
+	expectedX = [
+		6.0,  // 2
+		-3.0,
+		2.0,  // 1
+		7.0,
+		-5.0  // 0
+	];
+	expectedY = [
+		0.0, // 2
+		3.0,
+		4.0, // 1
+		1.0,
+		2.0  // 0
+	];
+
+	gsort2ins( 3, 1.0, toAccessorArray( x ), -2, x.length-1, toAccessorArray( y ), -2, y.length-1 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function supports specifying negative strides (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -573,6 +1065,47 @@ tape( 'the function supports specifying negative strides (decreasing order)', fu
 	t.end();
 });
 
+tape( 'the function supports specifying negative strides (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [
+		2.0,  // 2
+		-3.0,
+		-5.0, // 1
+		7.0,
+		6.0   // 0
+	];
+	y = [
+		4.0, // 2
+		3.0,
+		2.0, // 1
+		1.0,
+		0.0  // 0
+	];
+	expectedX = [
+		-5.0, // 2
+		-3.0,
+		2.0,  // 1
+		7.0,
+		6.0   // 0
+	];
+	expectedY = [
+		2.0, // 2
+		3.0,
+		4.0, // 1
+		1.0,
+		0.0  // 0
+	];
+
+	gsort2ins( 3, -1.0, toAccessorArray( x ), -2, x.length-1, toAccessorArray( y ), -2, y.length-1 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function supports specifying offsets (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -618,6 +1151,51 @@ tape( 'the function supports specifying offsets (increasing order)', function te
 	t.end();
 });
 
+tape( 'the function supports specifying offsets (increasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [
+		1.0,
+		-2.0, // 0
+		3.0,
+		-4.0, // 1
+		5.0,
+		-6.0  // 2
+	];
+	y = [
+		0.0,
+		1.0, // 0
+		2.0,
+		3.0, // 1
+		4.0,
+		5.0  // 2
+	];
+	expectedX = [
+		1.0,
+		-6.0, // 0
+		3.0,
+		-4.0, // 1
+		5.0,
+		-2.0  // 2
+	];
+	expectedY = [
+		0.0,
+		5.0, // 0
+		2.0,
+		3.0, // 1
+		4.0,
+		1.0  // 2
+	];
+
+	gsort2ins( 3, 1.0, toAccessorArray( x ), 2, 1, toAccessorArray( y ), 2, 1 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function supports specifying offsets (decreasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;
@@ -663,6 +1241,51 @@ tape( 'the function supports specifying offsets (decreasing order)', function te
 	t.end();
 });
 
+tape( 'the function supports specifying offsets (decreasing order, accessors)', function test( t ) {
+	var expectedX;
+	var expectedY;
+	var x;
+	var y;
+
+	x = [
+		1.0,
+		-6.0, // 0
+		3.0,
+		-4.0, // 1
+		5.0,
+		-2.0  // 2
+	];
+	y = [
+		0.0,
+		1.0, // 0
+		2.0,
+		3.0, // 1
+		4.0,
+		5.0  // 2
+	];
+	expectedX = [
+		1.0,
+		-2.0, // 0
+		3.0,
+		-4.0, // 1
+		5.0,
+		-6.0  // 2
+	];
+	expectedY = [
+		0.0,
+		5.0, // 0
+		2.0,
+		3.0, // 1
+		4.0,
+		1.0  // 2
+	];
+
+	gsort2ins( 3, -1.0, toAccessorArray( x ), 2, 1, toAccessorArray( y ), 2, 1 );
+	t.deepEqual( x, expectedX, 'returns expected value' );
+	t.deepEqual( y, expectedY, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function supports complex access patterns (increasing order)', function test( t ) {
 	var expectedX;
 	var expectedY;