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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
using System.Dynamic.Utils;
namespace System.Linq.Expressions.Interpreter
{
internal abstract class DivInstruction : Instruction
{
private static Instruction? s_Int16, s_Int32, s_Int64, s_UInt16, s_UInt32, s_UInt64, s_Single, s_Double;
public override int ConsumedStack => 2;
public override int ProducedStack => 1;
public override string InstructionName => "Div";
private DivInstruction() { }
private sealed class DivInt16 : DivInstruction
{
public override int Run(InterpretedFrame frame)
{
int index = frame.StackIndex;
object?[] stack = frame.Data;
object? left = stack[index - 2];
if (left != null)
{
object? right = stack[index - 1];
stack[index - 2] = right == null ? null : (object)unchecked((short)((short)left / (short)right));
}
frame.StackIndex = index - 1;
return 1;
}
}
private sealed class DivInt32 : DivInstruction
{
public override int Run(InterpretedFrame frame)
{
int index = frame.StackIndex;
object?[] stack = frame.Data;
object? left = stack[index - 2];
if (left != null)
{
object? right = stack[index - 1];
stack[index - 2] = right == null ? null : ScriptingRuntimeHelpers.Int32ToObject((int)left / (int)right);
}
frame.StackIndex = index - 1;
return 1;
}
}
private sealed class DivInt64 : DivInstruction
{
public override int Run(InterpretedFrame frame)
{
int index = frame.StackIndex;
object?[] stack = frame.Data;
object? left = stack[index - 2];
if (left != null)
{
object? right = stack[index - 1];
stack[index - 2] = right == null ? null : (object)((long)left / (long)right);
}
frame.StackIndex = index - 1;
return 1;
}
}
private sealed class DivUInt16 : DivInstruction
{
public override int Run(InterpretedFrame frame)
{
int index = frame.StackIndex;
object?[] stack = frame.Data;
object? left = stack[index - 2];
if (left != null)
{
object? right = stack[index - 1];
stack[index - 2] = right == null ? null : (object)unchecked((ushort)((ushort)left / (ushort)right));
}
frame.StackIndex = index - 1;
return 1;
}
}
private sealed class DivUInt32 : DivInstruction
{
public override int Run(InterpretedFrame frame)
{
int index = frame.StackIndex;
object?[] stack = frame.Data;
object? left = stack[index - 2];
if (left != null)
{
object? right = stack[index - 1];
stack[index - 2] = right == null ? null : (object)((uint)left / (uint)right);
}
frame.StackIndex = index - 1;
return 1;
}
}
private sealed class DivUInt64 : DivInstruction
{
public override int Run(InterpretedFrame frame)
{
int index = frame.StackIndex;
object?[] stack = frame.Data;
object? left = stack[index - 2];
if (left != null)
{
object? right = stack[index - 1];
stack[index - 2] = right == null ? null : (object)((ulong)left / (ulong)right);
}
frame.StackIndex = index - 1;
return 1;
}
}
private sealed class DivSingle : DivInstruction
{
public override int Run(InterpretedFrame frame)
{
int index = frame.StackIndex;
object?[] stack = frame.Data;
object? left = stack[index - 2];
if (left != null)
{
object? right = stack[index - 1];
stack[index - 2] = right == null ? null : (object)((float)left / (float)right);
}
frame.StackIndex = index - 1;
return 1;
}
}
private sealed class DivDouble : DivInstruction
{
public override int Run(InterpretedFrame frame)
{
int index = frame.StackIndex;
object?[] stack = frame.Data;
object? left = stack[index - 2];
if (left != null)
{
object? right = stack[index - 1];
stack[index - 2] = right == null ? null : (object)((double)left / (double)right);
}
frame.StackIndex = index - 1;
return 1;
}
}
public static Instruction Create(Type type)
{
Debug.Assert(!type.IsEnum);
return type.GetNonNullableType().GetTypeCode() switch
{
TypeCode.Int16 => s_Int16 ??= new DivInt16(),
TypeCode.Int32 => s_Int32 ??= new DivInt32(),
TypeCode.Int64 => s_Int64 ??= new DivInt64(),
TypeCode.UInt16 => s_UInt16 ??= new DivUInt16(),
TypeCode.UInt32 => s_UInt32 ??= new DivUInt32(),
TypeCode.UInt64 => s_UInt64 ??= new DivUInt64(),
TypeCode.Single => s_Single ??= new DivSingle(),
TypeCode.Double => s_Double ??= new DivDouble(),
_ => throw ContractUtils.Unreachable,
};
}
}
}
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