From 745da35324e7fcf77ff6f346620527f9a6b388a7 Mon Sep 17 00:00:00 2001
From: wheremyfoodat <44909372+wheremyfoodat@users.noreply.github.com>
Date: Thu, 4 Jan 2024 03:19:31 +0200
Subject: [PATCH] Fix cmp in x64 shader JIT

---
 src/core/PICA/dynapica/shader_rec_emitter_x64.cpp | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/core/PICA/dynapica/shader_rec_emitter_x64.cpp b/src/core/PICA/dynapica/shader_rec_emitter_x64.cpp
index 046c7813..65b73e30 100644
--- a/src/core/PICA/dynapica/shader_rec_emitter_x64.cpp
+++ b/src/core/PICA/dynapica/shader_rec_emitter_x64.cpp
@@ -403,11 +403,18 @@ void ShaderEmitter::checkCmpRegister(const PICAShader& shader, u32 instruction)
 	switch (condition) {
 		case 0: // Either cmp register matches 
 			// Z flag is 0 if at least 1 of them is set
-			test(word[statePointer + cmpRegXOffset], refX_refY_merged);
 
-			// Invert z flag
-			setz(al);
-			test(al, al);
+			// Check if X matches
+			cmp(byte[statePointer + cmpRegXOffset], refX);
+			sete(al);
+
+			// Or if Y matches
+			cmp(byte[statePointer + cmpRegYOffset], refY);
+			sete(cl);
+			or_(al, cl);
+
+			// If either of them matches, set Z to 1, else set it to 0
+			xor_(al, 1);
 			break;
 		case 1: // Both cmp registers match
 			cmp(word[statePointer + cmpRegXOffset], refX_refY_merged);