From 7878aa8e35f71473c21d79d6e7f0547c60c1aab5 Mon Sep 17 00:00:00 2001
From: riperiperi <rhy3756547@hotmail.com>
Date: Thu, 7 Jun 2018 23:55:47 +0100
Subject: [PATCH] Use compliment for negative smulh 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 fbc752c363..3f8ab5e3ef 100644
--- a/ChocolArm64/Instruction/ASoftFallback.cs
+++ b/ChocolArm64/Instruction/ASoftFallback.cs
@@ -159,7 +159,7 @@ namespace ChocolArm64.Instruction
             long Result = (long)UMulHi128((ulong)(LSign ? -LHS : LHS), (ulong)(RSign ? -RHS : RHS));
 
             if (LSign != RSign && LHS != 0 && RHS != 0)
-                return (-Result) - 1; //for negative results, hi 64-bits start at 0xFFF... and count back
+                return ~Result; //for negative results, hi 64-bits start at 0xFFF... and count back
             return Result;
         }