From acfae910328817bd84e2a7c748c398bc96042525 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Thu, 16 Jul 2020 00:49:33 +0200
Subject: [PATCH] UserspaceEmulator: Fix incorrect SALC behavior

As @tzoz pointed out, SALC should set AL to 0xff when CF=1, not 0x01.

Fixes #2819.
---
 DevTools/UserspaceEmulator/SoftCPU.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/DevTools/UserspaceEmulator/SoftCPU.cpp b/DevTools/UserspaceEmulator/SoftCPU.cpp
index 39dd220946..84a988ec95 100644
--- a/DevTools/UserspaceEmulator/SoftCPU.cpp
+++ b/DevTools/UserspaceEmulator/SoftCPU.cpp
@@ -1560,7 +1560,7 @@ void SoftCPU::SAHF(const X86::Instruction&) { TODO(); }
 
 void SoftCPU::SALC(const X86::Instruction&)
 {
-    set_al(cf() ? 0x01 : 0x00);
+    set_al(cf() ? 0xff : 0x00);
 
     if (m_secret_handshake_state < 2)
         ++m_secret_handshake_state;