disas: Canonocalize AND dest, #0... to mov

1 files changed, 6 insertions, 0 deletions

diff --git a/nandgame/assembler/disas.py b/nandgame/assembler/disas.py
index 607537a..0256976 100755
--- a/nandgame/assembler/disas.py
+++ b/nandgame/assembler/disas.py
@@ -146,6 +146,12 @@ def fixup_ins(ins: int) -> list[str]:
         # all other jumps? <=, >=, =, <=>
         else:
             return ["jmp", "", "", "", ""]
+    if mnemonic == "and" and op1 == ZERO:
+        if jumpdest in ["jgt", "jlt", "jne", JUMP_NONE]:
+            newjmp = ""
+        else:
+            newjmp = "jmp"
+        return ["mov", dest, ZERO, "", newjmp]
 
     return [mnemonic, dest, op1, op2, jumpdest]