From e893d2b9f5b25eb34c8aa758a50163881fbc0dd1 Mon Sep 17 00:00:00 2001
From: MadMaurice <madmaurice@zom.bi>
Date: Tue, 29 Aug 2023 23:04:31 +0200
Subject: [PATCH] cpu/decoder - Use variable instead calculating twice

---
 cpu/decoder.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/cpu/decoder.cpp b/cpu/decoder.cpp
index 0578d4f..fe54a2e 100644
--- a/cpu/decoder.cpp
+++ b/cpu/decoder.cpp
@@ -86,12 +86,13 @@ void Cpu::executeInstruction()
   else if((op & 0xC0) == 0x80) // ADD, ADC, SUB, ABC, CP, AND, OR, XOR
     {
       AluOp aluop = (AluOp)((op >> 3) & 0x3);
+      u8 reg = op & 0x7;
 
       u8 rhs;
-      switch(op & 0x7)
+      switch(reg)
         {
         case 0x6: rhs = bus->read8(state.HL); mcycles = 2; break;
-        default: rhs = state.reg8(op & 0x7); break;
+        default: rhs = state.reg8(reg); break;
         }
 
       aluop8(aluop, rhs);