From 4b703d24b53b1cba9c7ea8324bf89208e72a8a0b Mon Sep 17 00:00:00 2001
From: Jaklyy <102590697+Jaklyy@users.noreply.github.com>
Date: Mon, 22 Jul 2024 19:39:55 -0400
Subject: [PATCH] improve msr timings for arm9

---
 src/ARMInterpreter.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/ARMInterpreter.cpp b/src/ARMInterpreter.cpp
index e4b23641..0122e082 100644
--- a/src/ARMInterpreter.cpp
+++ b/src/ARMInterpreter.cpp
@@ -121,7 +121,8 @@ void A_MSR_IMM(ARM* cpu)
     if (!(cpu->CurInstr & (1<<22)))
         cpu->UpdateMode(oldpsr, cpu->CPSR);
 
-    cpu->AddCycles_C();
+    if ((cpu->Num != 1) && (cpu->CurInstr & (0x7<<16))) cpu->AddCycles_CI(2);
+    else cpu->AddCycles_C();
 }
 
 void A_MSR_REG(ARM* cpu)
@@ -174,7 +175,8 @@ void A_MSR_REG(ARM* cpu)
     if (!(cpu->CurInstr & (1<<22)))
         cpu->UpdateMode(oldpsr, cpu->CPSR);
 
-    cpu->AddCycles_C();
+    if ((cpu->Num != 1) && (cpu->CurInstr & (0x7<<16))) cpu->AddCycles_CI(2);
+    else cpu->AddCycles_C();
 }
 
 void A_MRS(ARM* cpu)