Add a new instruction `OP_LOADI16`.

Which loads 16bit integer to the register. The instruction number should
be reorder on massive instruction refactoring. The instruction is added
for `mruby/c` which had performance issue with `OP_EXT`. With this
instruction, `mruby/c` VM can just raise errors on `OP_EXT` extension
instructions.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/vm.c b/src/vm.c
index ea1bb5087..26da5831e 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -1047,6 +1047,11 @@ RETRY_TRY_BLOCK:
       NEXT;
     }
 
+    CASE(OP_LOADI16, BS) {
+      SET_INT_VALUE(regs[a], (mrb_int)(int16_t)b);
+      NEXT;
+    }
+
     CASE(OP_LOADSYM, BB) {
       SET_SYM_VALUE(regs[a], syms[b]);
       NEXT;