feat: add math/base/special/sincosdf

lib/node_modules/@stdlib/math/base/special/sincosdf/README.md

@@ -0,0 +1,204 @@
+<!--
+
+@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.
+
+-->
+
+# sincosdf
+
+> Simultaneously compute the [sine][@stdlib/math/base/special/sindf] and [cosine][@stdlib/math/base/special/cosdf] of a single-precision floating-point number (in degrees).
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var sincosdf = require( '@stdlib/math/base/special/sincosdf' );
+```
+
+#### sincosdf( x )
+
+Simultaneously computes the [sine][@stdlib/math/base/special/sindf] and [cosine][@stdlib/math/base/special/cosdf] of a single-precision floating-point number (in degrees).
+
+```javascript
+var v = sincosdf( 0.0 );
+// returns [ ~0.0, ~1.0 ]
+
+v = sincosdf( 90.0 );
+// returns [ ~1.0, ~0.0 ]
+
+v = sincosdf( -30.0 );
+// returns [ ~-0.5, ~0.866 ]
+```
+
+#### sincosdf.assign( x, out, stride, offset )
+
+Simultaneously computes the [sine][@stdlib/math/base/special/sindf] and [cosine][@stdlib/math/base/special/cosdf] of a single-precision floating-point number (in degrees) and assigns the results to a provided output array.
+
+```javascript
+var Float32Array = require( '@stdlib/array/float32' );
+
+var out = new Float32Array( 2 );
+
+var v = sincosdf.assign( 0.0, out, 1, 0 );
+// returns <Float32Array>[ ~0.0, ~1.0 ]
+
+var bool = ( v === out );
+// returns true
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var linspace = require( '@stdlib/array/base/linspace' );
+var sincosdf = require( '@stdlib/math/base/special/sincosdf' );
+
+var x = linspace( 0.0, 180.0, 100 );
+
+var y;
+var i;
+for ( i = 0; i < x.length; i++ ) {
+    y = sincosdf( x[ i ] );
+    console.log( 'sincosdf(%d) = [ %d, %d ]', x[ i ], y[ 0 ], y[ 1 ] );
+}
+```
+
+</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/sincosdf.h"
+```
+
+#### stdlib_base_sincosdf( x, &sine, &cosine )
+
+Simultaneously computes the [sine][@stdlib/math/base/special/sindf] and [cosine][@stdlib/math/base/special/cosdf] of a single-precision floating-point number (in degrees).
+
+```c
+float cosine;
+float sine;
+
+stdlib_base_sincosdf( 4.0f, &sine, &cosine );
+```
+
+The function accepts the following arguments:
+
+-   **x**: `[in] float` input value.
+-   **sine**: `[out] float*` destination for the sine.
+-   **cosine**: `[out] float*` destination for the cosine.
+
+```c
+void stdlib_base_sincosdf( const float x, float *sine, float *cosine );
+```
+
+</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/sincosdf.h"
+#include <stdio.h>
+
+int main( void ) {
+    const float x[] = { 0.0f, 90.0f, 180.0f, 360.0f };
+
+    float cosine;
+    float sine;
+    int i;
+    for ( i = 0; i < 4; i++ ) {
+        stdlib_base_sincosdf( x[ i ], &sine, &cosine );
+        printf( "x: %f => sine: %f, cosine: %f\n", x[ i ], sine, cosine );
+    }
+}
+```
+
+</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">
+
+[@stdlib/math/base/special/cosdf]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/cosdf
+
+[@stdlib/math/base/special/sindf]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/sindf
+
+<!-- <related-links> -->
+
+<!-- </related-links> -->
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/math/base/special/sincosdf/benchmark/benchmark.js

@@ -0,0 +1,133 @@
+/**
+* @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 uniform = require( '@stdlib/random/array/uniform' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var sindf = require( '@stdlib/math/base/special/sindf' );
+var cosdf = require( '@stdlib/math/base/special/cosdf' );
+var pkg = require( './../package.json' ).name;
+var sincosdf = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, 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 = sincosdf( x[ i % x.length ] );
+		if ( isnanf( y[ 0 ] ) || isnanf( y[ 1 ] ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnanf( y[ 0 ] ) || isnanf( y[ 1 ] ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
+
+bench( format( '%s::separate-evaluation', pkg ), function benchmark( b ) {
+	var x;
+	var y;
+	var i;
+
+	x = uniform( 100, -10.0, 10.0, {
+		'dtype': 'float32'
+	});
+	y = [ 0.0, 0.0 ];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		y = [ sindf( x[ i % x.length ] ), cosdf( x[ i % x.length ] ) ];
+		if ( isnanf( y[ 0 ] ) || isnanf( y[ 1 ] ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnanf( y[ 0 ] ) || isnanf( y[ 1 ] ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+} );
+
+bench( format( '%s:assign', pkg ), function benchmark( b ) {
+	var x;
+	var y;
+	var i;
+
+	x = uniform( 100, -10.0, 10.0, {
+		'dtype': 'float32'
+	});
+	y = [ 0.0, 0.0 ];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		sincosdf.assign( x[ i % x.length ], y, 1, 0 );
+		if ( isnanf( y[ 0 ] ) || isnanf( y[ 1 ] ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnanf( y[ 0 ] ) || isnanf( y[ 1 ] ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+} );
+
+bench( format( '%s::separate-evaluation,in-place', pkg ), function benchmark( b ) {
+	var x;
+	var y;
+	var i;
+
+	x = uniform( 100, -10.0, 10.0, {
+		'dtype': 'float32'
+	});
+	y = [ 0.0, 0.0 ];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		y[ 0 ] = sindf( x[ i % x.length ] );
+		y[ 1 ] = cosdf( x[ i % x.length ] );
+		if ( isnanf( y[ 0 ] ) || isnanf( y[ 1 ] ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnanf( y[ 0 ] ) || isnanf( y[ 1 ] ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+} );