Implement some 32-bit Thumb instructions (#3614)

* Implement some 32-bit Thumb instructions * Optimize OpCode32MemMult using PopCount
2022-08-25 06:59:34 -03:00
parent b994dafe7a
commit eba682b767
13 changed files with 190 additions and 15 deletions
--- 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)
            {