RightShiftInstruction.cs

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using System.Dynamic.Utils;
 
namespace System.Linq.Expressions.Interpreter;
 
internal abstract class RightShiftInstruction : Instruction
{
    private sealed class RightShiftSByte : RightShiftInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            object obj2 = frame.Pop();
            if (obj2 == null || obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push((sbyte)((sbyte)obj2 >> (int)obj));
            }
            return 1;
        }
    }
 
    private sealed class RightShiftInt16 : RightShiftInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            object obj2 = frame.Pop();
            if (obj2 == null || obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push((short)((short)obj2 >> (int)obj));
            }
            return 1;
        }
    }
 
    private sealed class RightShiftInt32 : RightShiftInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            object obj2 = frame.Pop();
            if (obj2 == null || obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push((int)obj2 >> (int)obj);
            }
            return 1;
        }
    }
 
    private sealed class RightShiftInt64 : RightShiftInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            object obj2 = frame.Pop();
            if (obj2 == null || obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push((long)obj2 >> (int)obj);
            }
            return 1;
        }
    }
 
    private sealed class RightShiftByte : RightShiftInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            object obj2 = frame.Pop();
            if (obj2 == null || obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push((byte)((byte)obj2 >> (int)obj));
            }
            return 1;
        }
    }
 
    private sealed class RightShiftUInt16 : RightShiftInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            object obj2 = frame.Pop();
            if (obj2 == null || obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push((ushort)((ushort)obj2 >> (int)obj));
            }
            return 1;
        }
    }
 
    private sealed class RightShiftUInt32 : RightShiftInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            object obj2 = frame.Pop();
            if (obj2 == null || obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push((uint)obj2 >> (int)obj);
            }
            return 1;
        }
    }
 
    private sealed class RightShiftUInt64 : RightShiftInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            object obj2 = frame.Pop();
            if (obj2 == null || obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push((ulong)obj2 >> (int)obj);
            }
            return 1;
        }
    }
 
    private static Instruction s_SByte;
 
    private static Instruction s_Int16;
 
    private static Instruction s_Int32;
 
    private static Instruction s_Int64;
 
    private static Instruction s_Byte;
 
    private static Instruction s_UInt16;
 
    private static Instruction s_UInt32;
 
    private static Instruction s_UInt64;
 
    public override int ConsumedStack => 2;
 
    public override int ProducedStack => 1;
 
    public override string InstructionName => "RightShift";
 
    private RightShiftInstruction()
    {
    }
 
    public static Instruction Create(Type type)
    {
        return type.GetNonNullableType().GetTypeCode() switch
        {
            TypeCode.SByte => s_SByte ?? (s_SByte = new RightShiftSByte()), 
            TypeCode.Int16 => s_Int16 ?? (s_Int16 = new RightShiftInt16()), 
            TypeCode.Int32 => s_Int32 ?? (s_Int32 = new RightShiftInt32()), 
            TypeCode.Int64 => s_Int64 ?? (s_Int64 = new RightShiftInt64()), 
            TypeCode.Byte => s_Byte ?? (s_Byte = new RightShiftByte()), 
            TypeCode.UInt16 => s_UInt16 ?? (s_UInt16 = new RightShiftUInt16()), 
            TypeCode.UInt32 => s_UInt32 ?? (s_UInt32 = new RightShiftUInt32()), 
            TypeCode.UInt64 => s_UInt64 ?? (s_UInt64 = new RightShiftUInt64()), 
            _ => throw ContractUtils.Unreachable, 
        };
    }
}