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+<!--
+
+@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.
+
+-->
+
+# Haversine
+
+> Compute the half-value [versed sine][versed-sine] of a single-precision floating-point number (in radians).
+
+<section class="intro">
+
+The half-value [versed sine][versed-sine] is defined as
+
+<!-- <equation class="equation" label="eq:haversine" align="center" raw="\operatorname{haversin}(\theta) = \frac{1 - \cos \theta}{2}" alt="Haversed sine."> -->
+
+```math
+\mathop{\mathrm{haversin}}(\theta) = \frac{1 - \cos \theta}{2}
+```
+
+<!-- </equation> -->
+
+</section>
+
+<!-- /.intro -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var haversinf = require( '@stdlib/math/base/special/haversinf' );
+```
+
+#### haversinf( x )
+
+Computes the half-value [versed sine][versed-sine] of a single-precision floating-point number (in radians).
+
+```javascript
+var v = haversinf( 0.0 );
+// returns 0.0
+
+v = haversinf( 3.141592653589793/2.0 );
+// returns 0.5
+
+v = haversinf( -3.141592653589793/6.0 );
+// returns ~0.067
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var uniform = require( '@stdlib/random/array/uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var TWO_PI = require( '@stdlib/constants/float32/two-pi' );
+var haversinf = require( '@stdlib/math/base/special/haversinf' );
+
+var opts = {
+'dtype': 'float32'
+};
+var x = uniform( 100, 0.0, TWO_PI, opts );
+
+logEachMap( 'haversinf(%0.4f) = %0.4f', x, haversinf );
+```
+
+</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
+#include "stdlib/math/base/special/haversinf.h"
+```
+
+#### stdlib_base_haversinf( x )
+
+Computes the half-value [versed sine][versed-sine] of a single-precision floating-point number (in radians).
+
+```c
+float out = stdlib_base_haversinf( 0.0f );
+// returns 0.0f
+
+out = stdlib_base_haversinf( 3.141592653589793f / 2.0f );
+// returns 0.5f
+```
+
+The function accepts the following arguments:
+
+- **x**: `[in] float` input value.
+
+```c
+float stdlib_base_haversinf( const float x );
+```
+
+</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
+#include "stdlib/math/base/special/haversinf.h"
+#include <stdio.h>
+
+int main( void ) {
+const float x[] = { 0.0f, 0.523f, 0.785f, 1.047f, 3.14f };
+
+float y;
+int i;
+for ( i = 0; i < 5; i++ ) {
+y = stdlib_base_haversinf( x[ i ] );
+printf( "haversinf(%f) = %f\n", x[ i ], y );
+}
+}
+```
+
+</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">
+
+[versed-sine]: https://en.wikipedia.org/wiki/Versine
+
+<!-- <related-links> -->
+
+<!-- </related-links> -->
+
+</section>
+
+<!-- /.links -->

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+/**
+* @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 resolve = require( 'path' ).resolve;
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var haversinf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+'skip': ( haversinf instanceof Error )
+};
+
+
+// MAIN //
+
+bench( pkg+'::native', opts, function benchmark( b ) {
+var x;
+var y;
+var i;
+
+x = uniform( 100, -10.0, 10.0, {
+'dtype': 'float32'
+});
+
+b.tic();
+for ( i = 0; i < b.iterations; i++ ) {
+y = haversinf( x[ i%x.length ] );
+if ( isnanf( y ) ) {
+b.fail( 'should not return NaN' );
+}
+}
+b.toc();
+if ( isnanf( y ) ) {
+b.fail( 'should not return NaN' );
+}
+b.pass( 'benchmark finished' );
+b.end();
+});