math code: Add comments.

[gnulib.git] / lib / expl.c

diff --git a/lib/expl.c b/lib/expl.c
index c70f445..59cd6c3 100644 (file)
--- a/lib/expl.c
+++ b/lib/expl.c
@@ -33,6 +33,8 @@ expl (long double x)
 
 #else
 
+/* Code based on glibc/sysdeps/ieee754/ldbl-128/e_expl.c.  */
+
 # include <float.h>
 
 static const long double C[] = {