Officially specify - as the symbol for an implicit operand

Use - to denote that an operand is implicit (not encoded).  This
*better* be a fixed operand!

1 files changed, 1 insertions, 0 deletions

diff --git a/insns.pl b/insns.pl
index fbdb799..5b45d7e 100644
--- a/insns.pl
+++ b/insns.pl
@@ -490,6 +490,7 @@ sub startseq($) {
 # d = DREX "dst" field
 # i = immediate
 # s = register field of is4/imz2 field
+# - = implicit (unencoded) operand
 #
 # For an operand that should be filled into more than one field,
 # enter it as e.g. "r+v".