/// <summary> /// Get the proper sub-register of <paramref name="reg" /> that starts at offset /// <paramref name="offset" /> and is of size <paramref name="width"/>. /// </summary> /// <param name="reg">The parent register.</param> /// <param name="offset">The bit offset of the sub-register.</param> /// <param name="width">The bit width of the sub-register.</param> /// <returns> /// The sub-register. /// </returns> /// <remarks> /// Most architectures not have sub-registers, and will use this default implementation. This /// method is overridden for architectures like x86 and Z80, where sub-registers <code>(ah, al, /// etc)</code> /// do exist. /// </remarks> public override RegisterStorage GetSubregister(RegisterStorage reg, int offset, int width) => PICRegisters.GetSubregister(reg, offset, width);
/// <summary>
/// Gets a register given its index number.
/// </summary>
/// <param name="i">Zero-based index of the register.</param>
/// <returns>
/// The register instance or null.
/// </returns>
public override RegisterStorage GetRegister(StorageDomain domain, BitRange range)
=> PICRegisters.GetSubregister(
PICRegisters.PeekRegisterByIdx(domain - StorageDomain.Register),
range.Lsb,
range.Extent) !;
