First version of OP_MMBIN opcodes

In arithmetic/bitwise operators, the call to metamethods is made
in a separate opcode following the main one. (The main
opcode skips this next one when the operation succeeds.) This
change reduces slightly the size of the binary and the complexity
of the arithmetic/bitwise opcodes. It also simplfies the treatment
of errors and yeld/resume in these operations, as there are much
fewer cases to consider. (Only OP_MMBIN/OP_MMBINI/OP_MMBINK,
instead of all variants of all arithmetic/bitwise operators.)

1 files changed, 4 insertions, 0 deletions

diff --git a/lopcodes.h b/lopcodes.h
index 26b1850d..fd578c68 100644
--- a/lopcodes.h
+++ b/lopcodes.h
@@ -255,6 +255,10 @@ OP_BXOR,/*	A B C	R(A) := R(B) ~ R(C)				*/
 OP_SHL,/*       A B C   R(A) := R(B) << R(C)                            */
 OP_SHR,/*       A B C   R(A) := R(B) >> R(C)                            */
 
+OP_MMBIN,/*     A B C   call B metamethod for previous bin. operation   */
+OP_MMBINI,/*    A B C   call B metamethod for previous binI. operation  */
+OP_MMBINK,/*    A B C   call B metamethod for previous binK. operation  */
+
 OP_UNM,/*       A B     R(A) := -R(B)                                   */
 OP_BNOT,/*      A B     R(A) := ~R(B)                                   */
 OP_NOT,/*       A B     R(A) := not R(B)                                */