34 lines
1.0 KiB
C#
34 lines
1.0 KiB
C#
namespace ARMeilleure.Decoders
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{
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class OpCode32 : OpCode
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{
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public Condition Cond { get; protected set; }
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public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCode32(inst, address, opCode);
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public OpCode32(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
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{
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RegisterSize = RegisterSize.Int32;
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Cond = (Condition)((uint)opCode >> 28);
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}
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public bool IsThumb { get; protected init; } = false;
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public uint GetPc()
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{
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// Due to backwards compatibility and legacy behavior of ARMv4 CPUs pipeline,
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// the PC actually points 2 instructions ahead.
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if (IsThumb)
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{
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// PC is ahead by 4 in thumb mode whether or not the current instruction
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// is 16 or 32 bit.
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return (uint)Address + 4u;
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}
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else
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{
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return (uint)Address + 8u;
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}
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}
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}
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} |