feat: add lapack/base/dlabad

lib/node_modules/@stdlib/lapack/base/dlabad/README.md

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+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2026 The Stdlib Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+-->
+
+# dlabad
+
+> Adjust the underflow and overflow thresholds if the exponent range is very large.
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var dlabad = require( '@stdlib/lapack/base/dlabad' );
+```
+
+#### dlabad( SMALL, LARGE )
+
+Adjusts the underflow and overflow thresholds if the exponent range is very large.
+
+```javascript
+var Float64Array = require( '@stdlib/array/float64' );
+
+var SMALL = new Float64Array( [ 2.2250738585072014e-308 ] );
+var LARGE = new Float64Array( [ 1.7976931348623157e+308 ] );
+
+dlabad( SMALL, LARGE );
+// SMALL => <Float64Array>[ 2.2250738585072014e-308 ]
+// LARGE => <Float64Array>[ 1.7976931348623157e+308 ]
+```
+
+The function has the following parameters:
+
+-   **SMALL**: [`Float64Array`][mdn-float64array] containing a single element equal to the underflow threshold.
+-   **LARGE**: [`Float64Array`][mdn-float64array] containing a single element equal to the overflow threshold.
+
+#### dlabad.ndarray( SMALL, offsetSMALL, LARGE, offsetLARGE )
+
+Adjusts the underflow and overflow thresholds if the exponent range is very large using alternative indexing semantics.
+
+```javascript
+var Float64Array = require( '@stdlib/array/float64' );
+
+var SMALL = new Float64Array( [ 2.2250738585072014e-308 ] );
+var LARGE = new Float64Array( [ 1.7976931348623157e+308 ] );
+
+dlabad.ndarray( SMALL, 0, LARGE, 0 );
+// SMALL => <Float64Array>[ 2.2250738585072014e-308 ]
+// LARGE => <Float64Array>[ 1.7976931348623157e+308 ]
+```
+
+The function has the following parameters:
+
+-   **SMALL**: [`Float64Array`][mdn-float64array] containing an element equal to the underflow threshold.
+-   **offsetSMALL**: index of the element in `SMALL`.
+-   **LARGE**: [`Float64Array`][mdn-float64array] containing an element equal to the overflow threshold.
+-   **offsetLARGE**: index of the element in `LARGE`.
+
+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,
+
+```javascript
+var Float64Array = require( '@stdlib/array/float64' );
+
+var SMALL = new Float64Array( [ 0.0, 2.2250738585072014e-308, 0.0 ] );
+var LARGE = new Float64Array( [ 0.0, 0.0, 1.7976931348623157e+308 ] );
+
+dlabad.ndarray( SMALL, 1, LARGE, 2 );
+// SMALL => <Float64Array>[ 0.0, 2.2250738585072014e-308, 0.0 ]
+// LARGE => <Float64Array>[ 0.0, 0.0, 1.7976931348623157e+308 ]
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="notes">
+
+## Notes
+
+-   `dlabad()` corresponds to the [LAPACK][LAPACK] function [`dlabad`][lapack-dlabad].
+
+</section>
+
+<!-- /.notes -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var Float64Array = require( '@stdlib/array/float64' );
+var dlabad = require( '@stdlib/lapack/base/dlabad' );
+
+var SMALL = new Float64Array( [ 2.2250738585072014e-308 ] );
+var LARGE = new Float64Array( [ 1.7976931348623157e+308 ] );
+
+dlabad( SMALL, LARGE );
+console.log( 'SMALL:', SMALL[ 0 ] );
+console.log( 'LARGE:', LARGE[ 0 ] );
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- C interface documentation. -->
+
+* * *
+
+<section class="c">
+
+## C APIs
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- C usage documentation. -->
+
+<section class="usage">
+
+### Usage
+
+```c
+TODO
+```
+
+#### TODO
+
+TODO.
+
+```c
+TODO
+```
+
+TODO
+
+```c
+TODO
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- C API usage examples. -->
+
+<section class="examples">
+
+### Examples
+
+```c
+TODO
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+</section>
+
+<!-- /.related -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+[mdn-typed-array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray
+
+[lapack-dlabad]: https://www.netlib.org/lapack/explore-html/db/d91/group__labad_ga469557789831c29949bf455ca3b1dda5.html
+
+[mdn-float64array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array
+
+[lapack]: https://www.netlib.org/lapack/explore-html/
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/lapack/base/dlabad/benchmark/benchmark.js

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var Float64Array = require( '@stdlib/array/float64' );
+var pkg = require( './../package.json' ).name;
+var dlabad = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var SMALL;
+	var LARGE;
+	var i;
+
+	SMALL = new Float64Array( [ 2.2250738585072014e-308 ] );
+	LARGE = new Float64Array( [ 1.7976931348623157e+308 ] );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		dlabad( SMALL, LARGE );
+	}
+	b.toc();
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/lapack/base/dlabad/benchmark/benchmark.ndarray.js

@@ -0,0 +1,47 @@
+/**
+* @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 Float64Array = require( '@stdlib/array/float64' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var dlabad = require( './../lib' );
+
+
+// MAIN //
+
+bench( format( '%s:ndarray', pkg ), function benchmark( b ) {
+	var SMALL;
+	var LARGE;
+	var i;
+
+	SMALL = new Float64Array( [ 2.2250738585072014e-308 ] );
+	LARGE = new Float64Array( [ 1.7976931348623157e+308 ] );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		dlabad.ndarray( SMALL, 0, LARGE, 0 );
+	}
+	b.toc();
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/lapack/base/dlabad/docs/repl.txt

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+
+{{alias}}( SMALL, LARGE )
+    Adjust the underflow and overflow thresholds if the exponent range is
+    very large.
+
+    Indexing is relative to the first index. To introduce an offset, use typed
+    array views.
+
+    Parameters
+    ----------
+    SMALL: Float64Array
+        Array containing a single element equal to the underflow threshold.
+
+    LARGE: Float64Array
+        Array containing a single element equal to the overflow threshold.
+
+    Examples
+    --------
+    > var SMALL = new {{alias:@stdlib/array/float64}}( [ 2.2250738585072014e-308 ] );
+    > var LARGE = new {{alias:@stdlib/array/float64}}( [ 1.7976931348623157e+308 ] );
+    > {{alias}}( SMALL, LARGE );
+    > SMALL
+    <Float64Array>[ 2.2250738585072014e-308 ]
+    > LARGE
+    <Float64Array>[ 1.7976931348623157e+308 ]
+
+
+{{alias}}.ndarray( SMALL, offsetSMALL, LARGE, offsetLARGE )
+    Adjust the underflow and overflow thresholds if the exponent range is
+    very large using alternative indexing semantics.
+
+    While typed array views mandate a view offset based on the underlying
+    buffer, the offset parameters support indexing semantics based on starting
+    indices.
+
+    Parameters
+    ----------
+    SMALL: Float64Array
+        Array containing an element equal to the underflow threshold.
+
+    offsetSMALL: integer
+        Index of the element in `SMALL`.
+
+    LARGE: Float64Array
+        Array containing an element equal to the overflow threshold.
+
+    offsetLARGE: integer
+        Index of the element in `LARGE`.
+
+    Examples
+    --------
+    > var SMALL = new {{alias:@stdlib/array/float64}}( [ 0.0, 2.2250738585072014e-308, 0.0 ] );
+    > var LARGE = new {{alias:@stdlib/array/float64}}( [ 0.0, 0.0, 1.7976931348623157e+308 ] );
+    > {{alias}}.ndarray( SMALL, 1, LARGE, 2 );
+    > SMALL
+    <Float64Array>[ 0.0, 2.2250738585072014e-308, 0.0 ]
+    > LARGE
+    <Float64Array>[ 0.0, 0.0, 1.7976931348623157e+308 ]
+
+    See Also
+    --------