diff --git a/lib/node_modules/@stdlib/array/uint64/README.md b/lib/node_modules/@stdlib/array/uint64/README.md
index 02da19409141..3f36af04b09f 100644
--- a/lib/node_modules/@stdlib/array/uint64/README.md
+++ b/lib/node_modules/@stdlib/array/uint64/README.md
@@ -309,6 +309,42 @@ The returned [iterator][mdn-iterator-protocol] protocol-compliant object has the
- **next**: function which returns an [iterator][mdn-iterator-protocol] protocol-compliant object containing the next iterated value (if one exists) assigned to a `value` property and a `done` property having a `boolean` value indicating whether the [iterator][mdn-iterator-protocol] is finished.
- **return**: function which closes an [iterator][mdn-iterator-protocol] and returns a single (optional) argument in an [iterator][mdn-iterator-protocol] protocol-compliant object.
+
+
+#### Uint64Array.prototype.fill( value\[, start\[, end]] )
+
+Returns a modified typed array filled with a fill value.
+
+```javascript
+var Uint64 = require( '@stdlib/number/uint64/ctor' );
+
+var arr = new Uint64Array( 3 );
+
+// Set all elements to the same value:
+arr.fill( new Uint64( 1 ) );
+// arr => [ 1n, 1n, 1n ]
+
+// Fill all elements starting from the second element:
+arr.fill( new Uint64( 2 ), 1 );
+// arr => [ 1n, 2n, 2n ]
+
+// Fill all elements from first element until the second-to-last element:
+arr.fill( new Uint64( 3 ), 0, 2 );
+// arr => [ 3n, 3n, 2n ]
+```
+
+When a `start` and/or `end` index is negative, the respective index is determined relative to the last array element.
+
+```javascript
+var Uint64 = require( '@stdlib/number/uint64/ctor' );
+
+var arr = new Uint64Array( 3 );
+
+// Set all array elements, except the last element, to the same value:
+arr.fill( new Uint64( 1 ), 0, -1 );
+// arr => [ 1n, 1n, 0n ]
+```
+
#### Uint64Array.prototype.get( i )
diff --git a/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.fill.js b/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.fill.js
new file mode 100644
index 000000000000..57906323120c
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.fill.js
@@ -0,0 +1,59 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var format = require( '@stdlib/string/format' );
+var isUint64Array = require( '@stdlib/assert/is-uint64array' );
+var Uint64 = require( '@stdlib/number/uint64/ctor' );
+var pkg = require( './../package.json' ).name;
+var Uint64Array = require( './../lib' );
+
+
+// MAIN //
+
+bench( format( '%s:fill', pkg ), function benchmark( b ) {
+ var values;
+ var arr;
+ var out;
+ var i;
+
+ values = [
+ new Uint64( 1 ),
+ new Uint64( 2 ),
+ new Uint64( 3 )
+ ];
+ arr = new Uint64Array( 5 );
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = arr.fill( values[ i%values.length ] );
+ if ( typeof out !== 'object' ) {
+ b.fail( 'should return an object' );
+ }
+ }
+ b.toc();
+ if ( !isUint64Array( out ) ) {
+ b.fail( 'should return a Uint64Array' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.fill.length.js b/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.fill.length.js
new file mode 100644
index 000000000000..ca8e0eefc600
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.fill.length.js
@@ -0,0 +1,103 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var format = require( '@stdlib/string/format' );
+var isUint64Array = require( '@stdlib/assert/is-uint64array' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var Uint64 = require( '@stdlib/number/uint64/ctor' );
+var pkg = require( './../package.json' ).name;
+var Uint64Array = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - array length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+ var arr = new Uint64Array( len );
+ return benchmark;
+
+ /**
+ * Benchmark function.
+ *
+ * @private
+ * @param {Benchmark} b - benchmark instance
+ */
+ function benchmark( b ) {
+ var values;
+ var out;
+ var i;
+
+ values = [
+ new Uint64( 1 ),
+ new Uint64( 2 ),
+ new Uint64( 3 )
+ ];
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = arr.fill( values[ i%values.length ] );
+ if ( typeof out !== 'object' ) {
+ b.fail( 'should return an object' );
+ }
+ }
+ b.toc();
+ if ( !isUint64Array( out ) ) {
+ b.fail( 'should return a Uint64Array' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+ }
+}
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+*/
+function main() {
+ var len;
+ var min;
+ var max;
+ var f;
+ var i;
+
+ min = 1; // 10^min
+ max = 6; // 10^max
+
+ for ( i = min; i <= max; i++ ) {
+ len = pow( 10, i );
+ f = createBenchmark( len );
+ bench( format( '%s:fill:len=%d', pkg, len ), f );
+ }
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/array/uint64/docs/repl.txt b/lib/node_modules/@stdlib/array/uint64/docs/repl.txt
index c737fc5bf588..00ee2dfd0f91 100644
--- a/lib/node_modules/@stdlib/array/uint64/docs/repl.txt
+++ b/lib/node_modules/@stdlib/array/uint64/docs/repl.txt
@@ -275,6 +275,34 @@
true
+{{alias}}.prototype.fill( value[, start[, end]] )
+ Returns a modified typed array filled with a fill value.
+
+ Parameters
+ ----------
+ value: Uint64
+ Fill value.
+
+ start: integer (optional)
+ Start index. If less than zero, the start index is resolved relative to
+ the last array element. Default: 0.
+
+ end: integer (optional)
+ End index (non-inclusive). If less than zero, the end index is resolved
+ relative to the last array element. Default: out.length.
+
+ Returns
+ -------
+ out: Uint64Array
+ Modified array.
+
+ Examples
+ --------
+ > var arr = new {{alias}}( 3 );
+ > arr.fill( 1 )
+ [ 1n, 1n, 1n ]
+
+
{{alias}}.prototype.get( i )
Returns an array element located at integer position (index) `i`.
diff --git a/lib/node_modules/@stdlib/array/uint64/docs/types/index.d.ts b/lib/node_modules/@stdlib/array/uint64/docs/types/index.d.ts
index 78b11c503625..2f95fc802ff5 100644
--- a/lib/node_modules/@stdlib/array/uint64/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/array/uint64/docs/types/index.d.ts
@@ -454,6 +454,23 @@ declare class Uint64Array implements Uint64ArrayInterface {
*/
entries(): TypedIterator<[number, Uint64]>;
+ /**
+ * Returns a modified typed array filled with a fill value.
+ *
+ * @param value - fill value
+ * @param start - starting index (inclusive)
+ * @param end - ending index (exclusive)
+ * @returns modified typed array
+ *
+ * @example
+ * var arr = new Uint64Array( 3 );
+ * // returns [ 0n , 0n, 0n ]
+ *
+ * arr = arr.fill( 1, 1 );
+ * // returns [ 0n, 1n, 1n ]
+ */
+ fill( value: Uint, start?: number, end?: number ): Uint64Array;
+
/**
* Returns an array element.
*
diff --git a/lib/node_modules/@stdlib/array/uint64/lib/main.js b/lib/node_modules/@stdlib/array/uint64/lib/main.js
index 684cb8e4b9bd..ffa4563fb675 100644
--- a/lib/node_modules/@stdlib/array/uint64/lib/main.js
+++ b/lib/node_modules/@stdlib/array/uint64/lib/main.js
@@ -702,6 +702,86 @@ setReadOnly( Uint64Array.prototype, 'entries', function entries() {
}
});
+/**
+* Returns a modified typed array filled with a fill value.
+*
+* @name fill
+* @memberof Uint64Array.prototype
+* @type {Function}
+* @param {(Uint64|bigint|number)} value - fill value
+* @param {integer} [start=0] - starting index (inclusive)
+* @param {integer} [end] - ending index (exclusive)
+* @throws {TypeError} `this` must be a 64-bit unsigned integer array
+* @throws {TypeError} first argument must be either a 64-bit unsigned integer or a value which can be converted to a 64-bit unsigned integer
+* @throws {TypeError} second argument must be an integer
+* @throws {TypeError} third argument must be an integer
+* @returns {Uint64Array} modified array
+*
+* @example
+* var arr = new Uint64Array( 3 );
+* // returns [ 0n , 0n, 0n ]
+*
+* arr = arr.fill( 1, 1 );
+* // returns [ 0n, 1n, 1n ]
+*/
+setReadOnly( Uint64Array.prototype, 'fill', function fill( value, start, end ) {
+ var words;
+ var buf;
+ var len;
+ var idx;
+ var i;
+ if ( !isUint64Array( this ) ) {
+ throw new TypeError( 'invalid invocation. `this` is not a 64-bit unsigned integer array.' );
+ }
+ if ( !isUint64( value ) ) {
+ try {
+ value = new Uint64( value );
+ } catch ( err ) { // eslint-disable-line no-unused-vars
+ throw new TypeError( format( 'invalid argument. First argument must be either a 64-bit unsigned integer or a value which can be converted to a 64-bit unsigned integer. Value: `%s`.', value ) );
+ }
+ }
+ buf = this._buffer;
+ len = this._length;
+ if ( arguments.length > 1 ) {
+ if ( !isInteger( start ) ) {
+ throw new TypeError( format( 'invalid argument. Second argument must be an integer. Value: `%s`.', start ) );
+ }
+ if ( start < 0 ) {
+ start += len;
+ if ( start < 0 ) {
+ start = 0;
+ }
+ }
+ if ( arguments.length > 2 ) {
+ if ( !isInteger( end ) ) {
+ throw new TypeError( format( 'invalid argument. Third argument must be an integer. Value: `%s`.', end ) );
+ }
+ if ( end < 0 ) {
+ end += len;
+ if ( end < 0 ) {
+ end = 0;
+ }
+ }
+ if ( end > len ) {
+ end = len;
+ }
+ } else {
+ end = len;
+ }
+ } else {
+ start = 0;
+ end = len;
+ }
+ words = [ 0, 0 ];
+ toWords( value, words, 1, 0 );
+ for ( i = start; i < end; i++ ) {
+ idx = 2*i;
+ buf[ idx+indices.HIGH ] = words[ 0 ];
+ buf[ idx+indices.LOW ] = words[ 1 ];
+ }
+ return this;
+});
+
/**
* Returns an array element.
*
diff --git a/lib/node_modules/@stdlib/array/uint64/test/test.fill.js b/lib/node_modules/@stdlib/array/uint64/test/test.fill.js
new file mode 100644
index 000000000000..7f8701cc2d63
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/uint64/test/test.fill.js
@@ -0,0 +1,282 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var hasOwnProp = require( '@stdlib/assert/has-own-property' );
+var isFunction = require( '@stdlib/assert/is-function' );
+var Float64Array = require( '@stdlib/array/float64' );
+var Uint64 = require( '@stdlib/number/uint64/ctor' );
+var Uint64Array = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof Uint64Array, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'attached to the prototype of the main export is a `fill` method', function test( t ) {
+ t.strictEqual( hasOwnProp( Uint64Array.prototype, 'fill' ), true, 'has property' );
+ t.strictEqual( isFunction( Uint64Array.prototype.fill ), true, 'has method' );
+ t.end();
+});
+
+tape( 'the method throws an error if invoked with a `this` context which is not a 64-bit unsigned integer array instance', function test( t ) {
+ var values;
+ var arr;
+ var i;
+
+ arr = new Uint64Array( 5 );
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ {},
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ return arr.fill.call( value, new Uint64( 1 ) );
+ };
+ }
+});
+
+tape( 'the method throws an error if provided a first argument which is not a nonnegative integer, nonnegative bigint, 64-bit unsigned integer', function test( t ) {
+ var values;
+ var arr;
+ var i;
+
+ arr = new Uint64Array( 5 );
+
+ values = [
+ '5',
+ -5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ {},
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ return arr.fill( value );
+ };
+ }
+});
+
+tape( 'the method throws an error if provided a second argument which is not an integer', function test( t ) {
+ var values;
+ var arr;
+ var i;
+
+ arr = new Uint64Array( 10 );
+
+ values = [
+ '5',
+ 3.14,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ {},
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ return arr.fill( new Uint64( 1 ), value );
+ };
+ }
+});
+
+tape( 'the method throws an error if provided a third argument which is not an integer', function test( t ) {
+ var values;
+ var arr;
+ var i;
+
+ arr = new Uint64Array( 10 );
+
+ values = [
+ '5',
+ 3.14,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ {},
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ return arr.fill( new Uint64( 1 ), 0, value );
+ };
+ }
+});
+
+tape( 'the method returns an empty array if operating on an empty 64-bit unsigned integer array', function test( t ) {
+ var arr;
+ var out;
+
+ arr = new Uint64Array();
+ out = arr.fill( new Uint64( 1 ) );
+
+ t.strictEqual( out instanceof Uint64Array, true, 'returns expected value' );
+ t.strictEqual( out.length, 0, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the method does not change the array length', function test( t ) {
+ var arr;
+ var out;
+
+ arr = new Uint64Array( 10 );
+ out = arr.fill( new Uint64( 1 ) );
+
+ t.strictEqual( out, arr, 'returns expected value' );
+ t.strictEqual( arr.length, 10, 'returns expected value' );
+ t.end();
+});
+
+tape( 'if called with one argument, the method sets each array element to the provided value', function test( t ) {
+ var expected;
+ var arr;
+
+ arr = new Uint64Array( 3 );
+ expected = new Float64Array( [ 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 ] );
+
+ arr.fill( new Uint64( 1 ) );
+
+ t.deepEqual( reinterpret128( arr, 0 ), expected, 'returns expected value' );
+ t.end();
+});
+
+// tape( 'if called with two arguments, the method sets each array element to the provided value starting from a start index (inclusive)', function test( t ) {
+// var expected;
+// var arr;
+
+// arr = new Uint64Array( 3 );
+// expected = new Float64Array( [ 0.0, 0.0, 1.0, 1.0, 1.0, 1.0 ] );
+
+// arr.fill( new Uint64( 1.0, 1.0 ), 1 );
+
+// t.deepEqual( reinterpret128( arr, 0 ), expected, 'returns expected value' );
+// t.end();
+// });
+
+// tape( 'if called with three arguments, the method sets each array element to the provided value starting from a start index (inclusive) until a specified end index (exclusive)', function test( t ) {
+// var expected;
+// var arr;
+
+// arr = new Uint64Array( 3 );
+// expected = new Float64Array( [ 1.0, 1.0, 1.0, 1.0, 0.0, 0.0 ] );
+
+// arr.fill( new Uint64( 1.0, 1.0 ), 0, 2 );
+
+// t.deepEqual( reinterpret128( arr, 0 ), expected, 'returns expected value' );
+// t.end();
+// });
+
+// tape( 'the method supports negative indices', function test( t ) {
+// var expected;
+// var arr;
+
+// arr = new Uint64Array( 3 );
+// expected = new Float64Array( [ 1.0, 1.0, 1.0, 1.0, 0.0, 0.0 ] );
+
+// arr.fill( new Uint64( 1.0, 1.0 ), -3, -1 );
+
+// t.deepEqual( reinterpret128( arr, 0 ), expected, 'returns expected value' );
+// t.end();
+// });
+
+// tape( 'if a provided start index resolves to a negative index, the method fills an array starting from the first element', function test( t ) {
+// var expected;
+// var arr;
+
+// arr = new Uint64Array( 3 );
+// expected = new Float64Array( [ 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 ] );
+
+// arr.fill( new Uint64( 1.0, 1.0 ), -10 );
+
+// t.deepEqual( reinterpret128( arr, 0 ), expected, 'returns expected value' );
+// t.end();
+// });
+
+// tape( 'if a provided end index resolves to an index exceeding the last array element index, the method fills an array until the last element (inclusive)', function test( t ) {
+// var expected;
+// var arr;
+
+// arr = new Uint64Array( 3 );
+// expected = new Float64Array( [ 0.0, 0.0, 1.0, 1.0, 1.0, 1.0 ] );
+
+// arr.fill( new Uint64( 1.0, 1.0 ), 1, 10 );
+
+// t.deepEqual( reinterpret128( arr, 0 ), expected, 'returns expected value' );
+// t.end();
+// });
+
+// tape( 'if a provided start index resolves to an index which is greater than or equal to a resolved end index, the method does not fill an array', function test( t ) {
+// var expected;
+// var arr;
+
+// arr = new Uint64Array( 3 );
+// expected = new Float64Array( [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ] );
+
+// arr.fill( new Uint64( 1.0, 1.0 ), 2, 1 );
+
+// t.deepEqual( reinterpret128( arr, 0 ), expected, 'returns expected value' );
+// t.end();
+// });