1 files changed, 7 insertions, 0 deletions
diff --git a/pp.c b/pp.c
index 2b38805a10..f58306d0bb 100644
--- a/pp.c
+++ b/pp.c
@@ -13,6 +13,13 @@
  * and no knowing what you'll find around a corner.  And Elves, sir!" --Samwise
  */
 
+/* This file contains general pp ("push/pop") functions that execute the
+ * opcodes that make up a perl program. A typical pp function expects to
+ * find its arguments on the stack, and usually pushes its results onto
+ * the stack, hence the 'pp' terminology. Each OP structure contains
+ * a pointer to the relevant pp_foo() function.
+ */
+
 #include "EXTERN.h"
 #define PERL_IN_PP_C
 #include "perl.h"