bench: refactor benchmarks and update function parameter description

PR-URL: #3907
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: gunjjoshi

lib/node_modules/@stdlib/math/base/special/rempio2/benchmark/benchmark.js

@@ -21,7 +21,7 @@
 // MODULES //
 
 var bench = require( '@stdlib/bench' );
-var randu = require( '@stdlib/random/base/randu' );
+var randu = require( '@stdlib/random/array/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pkg = require( './../package.json' ).name;
 var rempio2 = require( './../lib' );
@@ -36,11 +36,11 @@ bench( pkg, function benchmark( b ) {
 	var i;
 
 	y = [ 0.0, 0.0 ];
+	x = randu( 100, -100.0, 100.0 );
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		x = ( randu()*200.0 ) - 100.0;
-		n = rempio2( x, y );
+		n = rempio2( x[ i % x.length ], y );
 		if ( isnan( n ) ) {
 			b.fail( 'should not return NaN' );
 		}

lib/node_modules/@stdlib/math/base/special/rempio2/benchmark/benchmark.native.js

@@ -22,7 +22,7 @@
 
 var resolve = require( 'path' ).resolve;
 var bench = require( '@stdlib/bench' );
-var randu = require( '@stdlib/random/base/randu' );
+var randu = require( '@stdlib/random/array/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 var pkg = require( './../package.json' ).name;
@@ -45,11 +45,11 @@ bench( pkg+'::native', opts, function benchmark( b ) {
 	var i;
 
 	y = [ 0.0, 0.0 ];
+	x = randu( 100, -100.0, 100.0 );
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		x = ( randu() * 200.0 ) - 100.0;
-		n = rempio2( x, y );
+		n = rempio2( x[ i % x.length ], y );
 		if ( isnan( n ) ) {
 			b.fail( 'should not return NaN' );
 		}

lib/node_modules/@stdlib/math/base/special/rempio2/benchmark/c/native/benchmark.c

@@ -90,18 +90,21 @@ static double rand_double( void ) {
 * @return elapsed time in seconds
 */
 static double benchmark( void ) {
+	double x[ 100 ];
 	double elapsed;
 	double rem1;
 	double rem2;
-	double x;
 	double y;
 	double t;
 	int i;
 
+	for ( i = 0; i < 100; i++ ) {
+		x[ i ] = ( rand_double() * 200.0 ) - 100.0;
+	}
+
 	t = tic();
 	for ( i = 0; i < ITERATIONS; i++ ) {
-		x = ( rand_double() * 200.0 ) - 100.0;
-		y = stdlib_base_rempio2( x, &rem1, &rem2 );
+		y = stdlib_base_rempio2( x[ i % 100 ], &rem1, &rem2 );
 		if ( y != y ) {
 			printf( "should not return NaN\n" );
 			break;

lib/node_modules/@stdlib/math/base/special/rempio2/src/main.c

@@ -227,8 +227,7 @@ static const double PIO2[] = {
 *     -   The hexadecimal values are the intended ones for the following constants. The decimal values may be used, provided that the compiler will convert from decimal to binary accurately enough to produce the hexadecimal values shown.
 *
 * @param x       input value
-* @param rem1    remainder element 1
-* @param rem2    remainder element 2
+* @param y       output array to store the remainder
 * @param e0      the exponent of `x[0]` (must be <= 16360)
 * @param nx      dimension of `x[]`
 * @return        last 3 binary digits