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35 lines
1 KiB
C#
35 lines
1 KiB
C#
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using ARMeilleure.Instructions;
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using System;
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using System.Numerics;
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namespace ARMeilleure.Decoders
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{
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class OpCodeT16MemMult : OpCodeT16, 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 PostOffset { get; }
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public bool IsLoad { get; }
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public int Offset { get; }
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public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT16MemMult(inst, address, opCode);
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public OpCodeT16MemMult(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
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{
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RegisterMask = opCode & 0xff;
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Rn = (opCode >> 8) & 7;
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int regCount = BitOperations.PopCount((uint)RegisterMask);
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Offset = 0;
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PostOffset = 4 * regCount;
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IsLoad = inst.Name switch
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{
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InstName.Ldm => true,
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InstName.Stm => false,
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_ => throw new InvalidOperationException()
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};
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}
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}
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}
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