--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cgen/templates/inca-instr-decoding.h.impl	Fri May 11 16:21:51 2012 -0700
@@ -0,0 +1,32 @@
+<%namespace file="base.impl" import="*"/>\
+<%!
+def has_arg(instr):
+     ## don't generate code for unknown opcodes...
+    if instr.id in ["_unknown_opcode", 'NOP']:
+        return False
+    ## x_WITH_IMPL instruction don't have an implementation...
+    if not instr.impl:
+        return True
+    ## check against the "oparg" string being present in the operation implementation...
+    impl= instr.impl
+    if hasattr(instr, 'parent'):
+        impl+= instr.parent.impl
+    if 'oparg' in impl:
+        return True
+    return False
+%>
+
+static inline int
+instr_has_argument(unsigned char opcode) {
+    switch (opcode) {
+% for opcode, instr_obj in enumerate(instr_set):
+  % if has_arg(instr_obj):
+    case ${ instr_obj.id.upper() }:
+  % endif
+% endfor
+        return 1;
+    } // switch-case
+
+    return 0;
+} // END instr_has_argument
+