52 lines
No EOL
1.3 KiB
C#
52 lines
No EOL
1.3 KiB
C#
using System.Numerics;
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namespace ARMeilleure.Decoders
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{
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class OpCodeT32MemMult : OpCodeT32, IOpCode32MemMult
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{
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public int Rn { get; }
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public int RegisterMask { get; }
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public int Offset { get; }
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public int PostOffset { get; }
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public bool IsLoad { get; }
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public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT32MemMult(inst, address, opCode);
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public OpCodeT32MemMult(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
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{
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Rn = (opCode >> 16) & 0xf;
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bool isLoad = (opCode & (1 << 20)) != 0;
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bool w = (opCode & (1 << 21)) != 0;
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bool u = (opCode & (1 << 23)) != 0;
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bool p = (opCode & (1 << 24)) != 0;
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RegisterMask = opCode & 0xffff;
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int regsSize = BitOperations.PopCount((uint)RegisterMask) * 4;
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if (!u)
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{
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Offset -= regsSize;
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}
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if (u == p)
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{
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Offset += 4;
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}
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if (w)
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{
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PostOffset = u ? regsSize : -regsSize;
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}
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else
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{
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PostOffset = 0;
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}
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IsLoad = isLoad;
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}
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}
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} |