MulOvfInstruction.cs

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using System.Dynamic.Utils;
 
namespace System.Linq.Expressions.Interpreter;
 
internal abstract class MulOvfInstruction : Instruction
{
    private sealed class MulOvfInt16 : MulOvfInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            int stackIndex = frame.StackIndex;
            object[] data = frame.Data;
            object obj = data[stackIndex - 2];
            if (obj != null)
            {
                object obj2 = data[stackIndex - 1];
                data[stackIndex - 2] = ((obj2 == null) ? null : ((object)checked((short)((short)obj * (short)obj2))));
            }
            frame.StackIndex = stackIndex - 1;
            return 1;
        }
    }
 
    private sealed class MulOvfInt32 : MulOvfInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            int stackIndex = frame.StackIndex;
            object[] data = frame.Data;
            object obj = data[stackIndex - 2];
            if (obj != null)
            {
                object obj2 = data[stackIndex - 1];
                data[stackIndex - 2] = ((obj2 == null) ? null : ScriptingRuntimeHelpers.Int32ToObject(checked((int)obj * (int)obj2)));
            }
            frame.StackIndex = stackIndex - 1;
            return 1;
        }
    }
 
    private sealed class MulOvfInt64 : MulOvfInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            int stackIndex = frame.StackIndex;
            object[] data = frame.Data;
            object obj = data[stackIndex - 2];
            if (obj != null)
            {
                object obj2 = data[stackIndex - 1];
                data[stackIndex - 2] = ((obj2 == null) ? null : ((object)checked((long)obj * (long)obj2)));
            }
            frame.StackIndex = stackIndex - 1;
            return 1;
        }
    }
 
    private sealed class MulOvfUInt16 : MulOvfInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            int stackIndex = frame.StackIndex;
            object[] data = frame.Data;
            object obj = data[stackIndex - 2];
            if (obj != null)
            {
                object obj2 = data[stackIndex - 1];
                data[stackIndex - 2] = ((obj2 == null) ? null : ((object)checked((ushort)((ushort)obj * (ushort)obj2))));
            }
            frame.StackIndex = stackIndex - 1;
            return 1;
        }
    }
 
    private sealed class MulOvfUInt32 : MulOvfInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            int stackIndex = frame.StackIndex;
            object[] data = frame.Data;
            object obj = data[stackIndex - 2];
            if (obj != null)
            {
                object obj2 = data[stackIndex - 1];
                data[stackIndex - 2] = ((obj2 == null) ? null : ((object)checked((uint)obj * (uint)obj2)));
            }
            frame.StackIndex = stackIndex - 1;
            return 1;
        }
    }
 
    private sealed class MulOvfUInt64 : MulOvfInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            int stackIndex = frame.StackIndex;
            object[] data = frame.Data;
            object obj = data[stackIndex - 2];
            if (obj != null)
            {
                object obj2 = data[stackIndex - 1];
                data[stackIndex - 2] = ((obj2 == null) ? null : ((object)checked((ulong)obj * (ulong)obj2)));
            }
            frame.StackIndex = stackIndex - 1;
            return 1;
        }
    }
 
    private static Instruction s_Int16;
 
    private static Instruction s_Int32;
 
    private static Instruction s_Int64;
 
    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 => "MulOvf";
 
    private MulOvfInstruction()
    {
    }
 
    public static Instruction Create(Type type)
    {
        return type.GetNonNullableType().GetTypeCode() switch
        {
            TypeCode.Int16 => s_Int16 ?? (s_Int16 = new MulOvfInt16()), 
            TypeCode.Int32 => s_Int32 ?? (s_Int32 = new MulOvfInt32()), 
            TypeCode.Int64 => s_Int64 ?? (s_Int64 = new MulOvfInt64()), 
            TypeCode.UInt16 => s_UInt16 ?? (s_UInt16 = new MulOvfUInt16()), 
            TypeCode.UInt32 => s_UInt32 ?? (s_UInt32 = new MulOvfUInt32()), 
            TypeCode.UInt64 => s_UInt64 ?? (s_UInt64 = new MulOvfUInt64()), 
            _ => MulInstruction.Create(type), 
        };
    }
}