From d73111515e9b1f353d849664b7527824116f34d8 Mon Sep 17 00:00:00 2001
From: sBubshait <s.bobshit@gmail.com>
Date: Thu, 6 Jun 2024 00:47:06 +0100
Subject: [PATCH] Fix Overflow handling in Subtraction DP Register, w/ T

---
 src/execute.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/execute.c b/src/execute.c
index cc5d0ba..fc436af 100644
--- a/src/execute.c
+++ b/src/execute.c
@@ -262,7 +262,7 @@ static void executeDPRegister(Machine *state, a64inst_instruction *inst) {
                             writeRegister(state, dest, regType, result);
                             
                             updateCondNZ(state, result, regType);
-                            state->conditionCodes.Overflow = src1Val < result;
+                            state->conditionCodes.Overflow = getMSB(src1Val, regType) != getMSB(src2Val, regType) && getMSB(src1Val, regType) != getMSB(result, regType);
                             state->conditionCodes.Carry = src1Val >= src2Val;
                             break;