/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Microsoft Public License. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Microsoft Public License, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Microsoft Public License.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Reflection;
using System.Runtime.CompilerServices;
using Microsoft.Scripting.Runtime;
using Microsoft.Scripting.Utils;
namespace Microsoft.Scripting.Interpreter{
internal abstract class EqualInstruction : Instruction {
// Perf: EqualityComparer<T> but is 3/2 to 2 times slower.
private static Instruction _Reference, _Boolean, _SByte, _Int16, _Char, _Int32, _Int64, _Byte, _UInt16, _UInt32, _UInt64, _Single, _Double;
public override int ConsumedStack { get { return 2; } }
public override int ProducedStack { get { return 1; } }
private EqualInstruction() {
}
internal sealed class EqualBoolean : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((Boolean)frame.Pop()) == ((Boolean)frame.Pop()));
return +1;
}
}
internal sealed class EqualSByte : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((SByte)frame.Pop()) == ((SByte)frame.Pop()));
return +1;
}
}
internal sealed class EqualInt16 : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((Int16)frame.Pop()) == ((Int16)frame.Pop()));
return +1;
}
}
internal sealed class EqualChar : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((Char)frame.Pop()) == ((Char)frame.Pop()));
return +1;
}
}
internal sealed class EqualInt32 : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((Int32)frame.Pop()) == ((Int32)frame.Pop()));
return +1;
}
}
internal sealed class EqualInt64 : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((Int64)frame.Pop()) == ((Int64)frame.Pop()));
return +1;
}
}
internal sealed class EqualByte : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((Byte)frame.Pop()) == ((Byte)frame.Pop()));
return +1;
}
}
internal sealed class EqualUInt16 : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((UInt16)frame.Pop()) == ((UInt16)frame.Pop()));
return +1;
}
}
internal sealed class EqualUInt32 : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((UInt32)frame.Pop()) == ((UInt32)frame.Pop()));
return +1;
}
}
internal sealed class EqualUInt64 : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((UInt64)frame.Pop()) == ((UInt64)frame.Pop()));
return +1;
}
}
internal sealed class EqualSingle : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((Single)frame.Pop()) == ((Single)frame.Pop()));
return +1;
}
}
internal sealed class EqualDouble : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(((Double)frame.Pop()) == ((Double)frame.Pop()));
return +1;
}
}
internal sealed class EqualReference : EqualInstruction {
public override int Run(InterpretedFrame frame) {
frame.Push(frame.Pop() == frame.Pop());
return +1;
}
}
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")]
public static Instruction Create(Type type) {
// Boxed enums can be unboxed as their underlying types:
switch (Type.GetTypeCode(type.IsEnum ? Enum.GetUnderlyingType(type) : type)) {
case TypeCode.Boolean: return _Boolean ?? (_Boolean = new EqualBoolean());
case TypeCode.SByte: return _SByte ?? (_SByte = new EqualSByte());
case TypeCode.Byte: return _Byte ?? (_Byte = new EqualByte());
case TypeCode.Char: return _Char ?? (_Char = new EqualChar());
case TypeCode.Int16: return _Int16 ?? (_Int16 = new EqualInt16());
case TypeCode.Int32: return _Int32 ?? (_Int32 = new EqualInt32());
case TypeCode.Int64: return _Int64 ?? (_Int64 = new EqualInt64());
case TypeCode.UInt16: return _UInt16 ?? (_UInt16 = new EqualInt16());
case TypeCode.UInt32: return _UInt32 ?? (_UInt32 = new EqualInt32());
case TypeCode.UInt64: return _UInt64 ?? (_UInt64 = new EqualInt64());
case TypeCode.Single: return _Single ?? (_Single = new EqualSingle());
case TypeCode.Double: return _Double ?? (_Double = new EqualDouble());
case TypeCode.Object:
if (!type.IsValueType) {
return _Reference ?? (_Reference = new EqualReference());
}
// TODO: Nullable<T>
throw new NotImplementedException();
default:
throw new NotImplementedException();
}
}
public override string ToString() {
return "Equal()";
}
}
}
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