--- a/pytouhou/formats/ecl.py
+++ b/pytouhou/formats/ecl.py
@@ -31,25 +31,25 @@ class ECL(object):
                      8: ('if', 'set_random_float'),
                      9: ('iff', 'set_random_float2'),
                      10: ('i', None),
-                     13: ('iii', None),
-                     14: ('iii', None),
-                     15: ('iii', None),
-                     16: ('iii', None),
-                     17: ('iii', None),
+                     13: ('iii', 'set_random_int2'),
+                     14: ('iii', 'substract_int'),
+                     15: ('iii', 'multiply_int'),
+                     16: ('iii', 'divide_int'),
+                     17: ('iii', 'modulo'),
                      18: ('i', None),
-                     20: ('iff', 'add'),
-                     21: ('iff', 'sub'),
-                     23: ('iff', None),
+                     20: ('iff', 'add_float'),
+                     21: ('iff', 'substract_float'),
+                     23: ('iff', 'divide_float'),
                      25: ('iffff', None),
                      26: ('i', None),
                      27: ('ii', 'compare_ints'),
-                     28: ('ff', None),
-                     29: ('ii', None),
-                     30: ('ii', None),
+                     28: ('ff', 'compare_floats'),
+                     29: ('ii', 'relative_jump?'),
+                     30: ('ii', 'relative_jump?'),
                      31: ('ii', 'relative_jump_if_equal'),
-                     32: ('ii', None),
-                     33: ('ii', None),
-                     34: ('ii', None),
+                     32: ('ii', 'relative_jump?'),
+                     33: ('ii', 'relative_jump?'),
+                     34: ('ii', 'relative_jump?'),
                      35: ('iif', 'call'),
                      36: ('', 'return?'),
                      39: ('iifii', 'call_if_equal'),