From d05c2ef90dc2ae94d21aac5d61960dcb50160c35 Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Sat, 2 Jun 2018 20:42:45 -0400
Subject: [PATCH] Interpreter_Paired: Unset FPSCR.FI and FR in ps_res and
 ps_frsqrte in exceptional cases

If invalid operation exceptions or zero divide exceptions occur in
either of these instructions, FI and FR are supposed to be unset.
---
 Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp b/Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp
index 6a84132c96..ce4dfd9568 100644
--- a/Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp
+++ b/Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp
@@ -121,6 +121,8 @@ void Interpreter::ps_res(UGeckoInstruction inst)
   if (a == 0.0 || b == 0.0)
   {
     SetFPException(FPSCR_ZX);
+    FPSCR.FI = 0;
+    FPSCR.FR = 0;
   }
 
   rPS0(inst.FD) = Common::ApproximateReciprocal(a);
@@ -136,11 +138,15 @@ void Interpreter::ps_rsqrte(UGeckoInstruction inst)
   if (rPS0(inst.FB) == 0.0 || rPS1(inst.FB) == 0.0)
   {
     SetFPException(FPSCR_ZX);
+    FPSCR.FI = 0;
+    FPSCR.FR = 0;
   }
 
   if (rPS0(inst.FB) < 0.0 || rPS1(inst.FB) < 0.0)
   {
     SetFPException(FPSCR_VXSQRT);
+    FPSCR.FI = 0;
+    FPSCR.FR = 0;
   }
 
   rPS0(inst.FD) = ForceSingle(Common::ApproximateReciprocalSquareRoot(rPS0(inst.FB)));