From f95ebb9c55bb80f01f70fef591968a363204effb Mon Sep 17 00:00:00 2001
From: "Herman S." <429230+has207@users.noreply.github.com>
Date: Sun, 25 Jan 2026 02:08:33 +0900
Subject: [PATCH] [x64] Fix mismatched operand sizes in CNTLZ fallback

---
 src/xenia/cpu/backend/x64/x64_sequences.cc | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/xenia/cpu/backend/x64/x64_sequences.cc b/src/xenia/cpu/backend/x64/x64_sequences.cc
index 20a7edb6d..201038656 100644
--- a/src/xenia/cpu/backend/x64/x64_sequences.cc
+++ b/src/xenia/cpu/backend/x64/x64_sequences.cc
@@ -3150,12 +3150,12 @@ struct CNTLZ_I32 : Sequence<CNTLZ_I32, I<OPCODE_CNTLZ, I8Op, I32Op>> {
       Xbyak::Label end;
       e.inLocalLabel();
 
-      e.bsr(e.rax, i.src1);  // ZF set if i.src1 is 0
+      e.bsr(e.eax, i.src1);  // ZF set if i.src1 is 0
       e.mov(i.dest, 0x20);
       e.jz(end);
 
-      e.xor_(e.rax, 0x1F);
-      e.mov(i.dest, e.rax);
+      e.xor_(e.eax, 0x1F);
+      e.mov(i.dest, e.al);
 
       e.L(end);
       e.outLocalLabel();
@@ -3175,7 +3175,7 @@ struct CNTLZ_I64 : Sequence<CNTLZ_I64, I<OPCODE_CNTLZ, I8Op, I64Op>> {
       e.jz(end);
 
       e.xor_(e.rax, 0x3F);
-      e.mov(i.dest, e.rax);
+      e.mov(i.dest, e.al);
 
       e.L(end);
       e.outLocalLabel();