From 56f2d307bcbb53e71362833aa82daf917e2177f5 Mon Sep 17 00:00:00 2001
From: TellowKrinkle <tellowkrinkle@gmail.com>
Date: Thu, 27 Aug 2020 12:27:42 -0500
Subject: [PATCH] microVU: Fix empty register use

---
 pcsx2/x86/microVU_Lower.inl | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pcsx2/x86/microVU_Lower.inl b/pcsx2/x86/microVU_Lower.inl
index 3d60a99fad..ae6dd136cd 100644
--- a/pcsx2/x86/microVU_Lower.inl
+++ b/pcsx2/x86/microVU_Lower.inl
@@ -890,12 +890,17 @@ static void writeBackISW(microVU& mVU, void *base_ptr, xAddressReg reg) {
 				xLEA(gprT3q, ptr[(void*)((sptr)base_ptr + offset)]);
 				register_offset = offset;
 			}
-			xMOV(ptr32[gprT3q+gprT2q+(offset-register_offset)], gprT1);
+			xMOV(ptr32[gprT3q+reg+(offset-register_offset)], gprT1);
 		};
 		if (_X) writeBackAt(0);
 		if (_Y) writeBackAt(4);
 		if (_Z) writeBackAt(8);
 		if (_W) writeBackAt(12);
+	} else if (reg.IsEmpty()) {
+		if (_X) xMOV(ptr32[(void*)((uptr)base_ptr)], gprT1);
+		if (_Y) xMOV(ptr32[(void*)((uptr)base_ptr+4)], gprT1);
+		if (_Z) xMOV(ptr32[(void*)((uptr)base_ptr+8)], gprT1);
+		if (_W) xMOV(ptr32[(void*)((uptr)base_ptr+12)], gprT1);
 	} else {
 		if (_X) xMOV(ptr32[base_ptr+reg], gprT1);
 		if (_Y) xMOV(ptr32[base_ptr+reg+4], gprT1);