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using System;
namespace ChocolArm64
{
using System.Reflection.Emit;
static class ILGeneratorEx
{
public static void EmitLdc_I4(this ILGenerator generator, int value)
{
switch (value)
{
case 0: generator.Emit(OpCodes.Ldc_I4_0); break;
case 1: generator.Emit(OpCodes.Ldc_I4_1); break;
case 2: generator.Emit(OpCodes.Ldc_I4_2); break;
case 3: generator.Emit(OpCodes.Ldc_I4_3); break;
case 4: generator.Emit(OpCodes.Ldc_I4_4); break;
case 5: generator.Emit(OpCodes.Ldc_I4_5); break;
case 6: generator.Emit(OpCodes.Ldc_I4_6); break;
case 7: generator.Emit(OpCodes.Ldc_I4_7); break;
case 8: generator.Emit(OpCodes.Ldc_I4_8); break;
case -1: generator.Emit(OpCodes.Ldc_I4_M1); break;
default: generator.Emit(OpCodes.Ldc_I4, value); break;
}
}
public static void EmitLdarg(this ILGenerator generator, int index)
{
switch (index)
{
case 0: generator.Emit(OpCodes.Ldarg_0); break;
case 1: generator.Emit(OpCodes.Ldarg_1); break;
case 2: generator.Emit(OpCodes.Ldarg_2); break;
case 3: generator.Emit(OpCodes.Ldarg_3); break;
default:
if ((uint)index <= byte.MaxValue)
{
generator.Emit(OpCodes.Ldarg_S, (byte)index);
}
else if ((uint)index < ushort.MaxValue)
{
generator.Emit(OpCodes.Ldarg, (short)index);
}
else
{
throw new ArgumentOutOfRangeException(nameof(index));
}
break;
}
}
public static void EmitStarg(this ILGenerator generator, int index)
{
if ((uint)index <= byte.MaxValue)
{
generator.Emit(OpCodes.Starg_S, (byte)index);
}
else if ((uint)index < ushort.MaxValue)
{
generator.Emit(OpCodes.Starg, (short)index);
}
else
{
throw new ArgumentOutOfRangeException(nameof(index));
}
}
public static void EmitLdloc(this ILGenerator generator, int index)
{
switch (index)
{
case 0: generator.Emit(OpCodes.Ldloc_0); break;
case 1: generator.Emit(OpCodes.Ldloc_1); break;
case 2: generator.Emit(OpCodes.Ldloc_2); break;
case 3: generator.Emit(OpCodes.Ldloc_3); break;
default:
if ((uint)index <= byte.MaxValue)
{
generator.Emit(OpCodes.Ldloc_S, (byte)index);
}
else if ((uint)index < ushort.MaxValue)
{
generator.Emit(OpCodes.Ldloc, (short)index);
}
else
{
throw new ArgumentOutOfRangeException(nameof(index));
}
break;
}
}
public static void EmitStloc(this ILGenerator generator, int index)
{
switch (index)
{
case 0: generator.Emit(OpCodes.Stloc_0); break;
case 1: generator.Emit(OpCodes.Stloc_1); break;
case 2: generator.Emit(OpCodes.Stloc_2); break;
case 3: generator.Emit(OpCodes.Stloc_3); break;
default:
if ((uint)index <= byte.MaxValue)
{
generator.Emit(OpCodes.Stloc_S, (byte)index);
}
else if ((uint)index < ushort.MaxValue)
{
generator.Emit(OpCodes.Stloc, (short)index);
}
else
{
throw new ArgumentOutOfRangeException(nameof(index));
}
break;
}
}
}
}
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