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using System;
using System.Collections.Generic;
namespace ARMeilleure.IntermediateRepresentation
{
class Operand
{
public OperandKind Kind { get; }
public OperandType Type { get; }
public ulong Value { get; private set; }
public LinkedList<Node> Assignments { get; }
public LinkedList<Node> Uses { get; }
private Operand()
{
Assignments = new LinkedList<Node>();
Uses = new LinkedList<Node>();
}
public Operand(OperandKind kind, OperandType type = OperandType.None) : this()
{
Kind = kind;
Type = type;
}
public Operand(int value) : this(OperandKind.Constant, OperandType.I32)
{
Value = (uint)value;
}
public Operand(uint value) : this(OperandKind.Constant, OperandType.I32)
{
Value = (uint)value;
}
public Operand(long value) : this(OperandKind.Constant, OperandType.I64)
{
Value = (ulong)value;
}
public Operand(ulong value) : this(OperandKind.Constant, OperandType.I64)
{
Value = value;
}
public Operand(float value) : this(OperandKind.Constant, OperandType.FP32)
{
Value = (ulong)BitConverter.SingleToInt32Bits(value);
}
public Operand(double value) : this(OperandKind.Constant, OperandType.FP64)
{
Value = (ulong)BitConverter.DoubleToInt64Bits(value);
}
public Operand(int index, RegisterType regType, OperandType type) : this()
{
Kind = OperandKind.Register;
Type = type;
Value = (ulong)((int)regType << 24 | index);
}
public Register GetRegister()
{
return new Register((int)Value & 0xffffff, (RegisterType)(Value >> 24));
}
public byte AsByte()
{
return (byte)Value;
}
public short AsInt16()
{
return (short)Value;
}
public int AsInt32()
{
return (int)Value;
}
public long AsInt64()
{
return (long)Value;
}
public float AsFloat()
{
return BitConverter.Int32BitsToSingle((int)Value);
}
public double AsDouble()
{
return BitConverter.Int64BitsToDouble((long)Value);
}
internal void NumberLocal(int number)
{
if (Kind != OperandKind.LocalVariable)
{
throw new InvalidOperationException("The operand is not a local variable.");
}
Value = (ulong)number;
}
public override int GetHashCode()
{
if (Kind == OperandKind.LocalVariable)
{
return base.GetHashCode();
}
else
{
return (int)Value ^ ((int)Kind << 16) ^ ((int)Type << 20);
}
}
}
}
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