From 560001e02b09b64bc54ebc66ea8a11dd890cd1f9 Mon Sep 17 00:00:00 2001
From: riperiperi <rhy3756547@hotmail.com>
Date: Wed, 6 Jun 2018 23:43:09 +0100
Subject: [PATCH] smulh: Fixed mul with 0 acting like it had a negative result.

---
 ChocolArm64/Instruction/ASoftFallback.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ChocolArm64/Instruction/ASoftFallback.cs b/ChocolArm64/Instruction/ASoftFallback.cs
index 73ce5cdc93..fbc752c363 100644
--- a/ChocolArm64/Instruction/ASoftFallback.cs
+++ b/ChocolArm64/Instruction/ASoftFallback.cs
@@ -158,7 +158,7 @@ namespace ChocolArm64.Instruction
 
             long Result = (long)UMulHi128((ulong)(LSign ? -LHS : LHS), (ulong)(RSign ? -RHS : RHS));
 
-            if (LSign != RSign)
+            if (LSign != RSign && LHS != 0 && RHS != 0)
                 return (-Result) - 1; //for negative results, hi 64-bits start at 0xFFF... and count back
             return Result;
         }