MEDIUM: args: increase arg type to 5 bits and limit arg count to 5
We'll soon need to add new argument types, and we don't use the current
limit of 7 arguments, so let's increase the arg type size to 5 bits and
reduce the arg count to 5 (3 max are used today).
diff --git a/include/types/arg.h b/include/types/arg.h
index 17008d9..8e089ba 100644
--- a/include/types/arg.h
+++ b/include/types/arg.h
@@ -28,14 +28,16 @@
#include <common/chunk.h>
#include <common/mini-clist.h>
-/* encoding of each arg type */
-#define ARGT_BITS 4
+/* encoding of each arg type : up to 31 types are supported */
+#define ARGT_BITS 5
#define ARGT_NBTYPES (1 << ARGT_BITS)
#define ARGT_MASK (ARGT_NBTYPES - 1)
-/* encoding of the arg count */
+/* encoding of the arg count : up to 5 args are possible. 4 bits are left
+ * unused at the top.
+ */
#define ARGM_MASK ((1 << ARGM_BITS) - 1)
-#define ARGM_BITS 4
+#define ARGM_BITS 3
#define ARGM_NBARGS (32 - ARGM_BITS) / sizeof(int)
enum {