docs: add Doxygen comment

Signed-off-by: Philipp Burckhardt <[email protected]>

Author: Planeshifter

lib/node_modules/@stdlib/stats/base/dists/logistic/logcdf/src/main.c

@@ -22,6 +22,12 @@
 #include "stdlib/math/base/special/log1p.h"
 #include "stdlib/math/base/special/exp.h"
 
+/**
+* Computes `log(1 + exp(x))` in a numerically stable manner.
+*
+* @param x    input value
+* @return     log(1 + exp(x))
+*/
 double log1pexp( const double x ) {
 	if ( x <= 18.0 ) {
 		return stdlib_base_log1p( stdlib_base_exp( x ) );