From eba682b767a60db51ff624ae48a3ca0124634705 Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Thu, 25 Aug 2022 06:59:34 -0300
Subject: Implement some 32-bit Thumb instructions (#3614)

* Implement some 32-bit Thumb instructions

* Optimize OpCode32MemMult using PopCount
---
 ARMeilleure/Decoders/OpCode32MemMult.cs | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

(limited to 'ARMeilleure/Decoders/OpCode32MemMult.cs')

diff --git a/ARMeilleure/Decoders/OpCode32MemMult.cs b/ARMeilleure/Decoders/OpCode32MemMult.cs
index cc726196..522b96bb 100644
--- a/ARMeilleure/Decoders/OpCode32MemMult.cs
+++ b/ARMeilleure/Decoders/OpCode32MemMult.cs
@@ -1,3 +1,5 @@
+using System.Numerics;
+
 namespace ARMeilleure.Decoders
 {
     class OpCode32MemMult : OpCode32, IOpCode32MemMult
@@ -23,14 +25,7 @@ namespace ARMeilleure.Decoders
 
             RegisterMask = opCode & 0xffff;
 
-            int regsSize = 0;
-
-            for (int index = 0; index < 16; index++)
-            {
-                regsSize += (RegisterMask >> index) & 1;
-            }
-
-            regsSize *= 4;
+            int regsSize = BitOperations.PopCount((uint)RegisterMask) * 4;
 
             if (!u)
             {
-- 
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