feat: add c benchmark

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
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    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: missing_dependencies
  - task: lint_c_tests_fixtures
    status: na
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    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
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  - task: lint_license_headers
    status: passed
---

Author: shubham220420

lib/node_modules/@stdlib/math/base/special/log1pmxf/benchmark/c/Makefile

@@ -1,7 +1,7 @@
 #/
 # @license Apache-2.0
 #
-# Copyright (c) 2025 The Stdlib Authors.
+# 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.

lib/node_modules/@stdlib/math/base/special/log1pmxf/benchmark/c/benchmark.c

@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* 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.
@@ -16,14 +16,14 @@
 * limitations under the License.
 */
 
-#include "stdlib/math/base/special/log1pmx.h"
+#include "stdlib/math/base/special/log1pmxf.h"
 #include <stdlib.h>
 #include <stdio.h>
 #include <math.h>
 #include <time.h>
 #include <sys/time.h>
 
-#define NAME "log1pmx"
+#define NAME "log1pmxf"
 #define ITERATIONS 1000000
 #define REPEATS 3
 
@@ -79,9 +79,9 @@ static double tic( void ) {
 *
 * @return random number
 */
-static double rand_double( void ) {
-	int r = rand();
-	return (double)r / ( (double)RAND_MAX + 1.0 );
+static float random_uniform( const float min, const float max ) {
+	float v = (float)rand() / ( (float)RAND_MAX + 1.0f );
+	return min + ( v*(max-min) );
 }
 
 /**
@@ -91,18 +91,18 @@ static double rand_double( void ) {
 */
 static double benchmark( void ) {
 	double elapsed;
-	double x[ 100 ];
-	double y;
+	float x[ 100 ];
+	float y;
 	double t;
 	int i;
 
 	for ( i = 0; i < 100; i++ ) {
-		x[ i ] = 1000.0*rand_double();
+		x[ i ] = random_uniform( 0.0f, 100.0f );
 	}
 
 	t = tic();
 	for ( i = 0; i < ITERATIONS; i++ ) {
-		y = stdlib_base_log1pmx( x[ i%100 ] );
+		y = stdlib_base_log1pmxf( x[ i%100 ] );
 		if ( y != y ) {
 			printf( "should not return NaN\n" );
 			break;