From 74292364713fb0e2258343b38800499f115684c1 Mon Sep 17 00:00:00 2001
From: Michel Heily <michelheily@gmail.com>
Date: Fri, 26 Jul 2019 17:54:13 +0300
Subject: [PATCH] Fix mistake in UMLAL

Former-commit-id: 6fe9bdf5471b71b58dcf9ee9ffa03c41b24e6301
---
 src/core/arm7tdmi/arm/exec.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/core/arm7tdmi/arm/exec.rs b/src/core/arm7tdmi/arm/exec.rs
index d399105..30d1009 100644
--- a/src/core/arm7tdmi/arm/exec.rs
+++ b/src/core/arm7tdmi/arm/exec.rs
@@ -475,7 +475,9 @@ impl Core {
         self.add_cycle();
 
         if insn.accumulate_flag() {
-            result = result.wrapping_add(self.get_reg(rn) as u64);
+            let hi = self.get_reg(rd_hi) as u64;
+            let lo = self.get_reg(rd_lo) as u64;
+            result = result.wrapping_add(hi << 32 | lo);
             self.add_cycle();
         }