protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
{
int[] values;
ulong[] hashCodes;
EnumHelpers.BuildHashCodesTable(Type, out values, out hashCodes);
var hashCodesField = context.Context.InitConstField(Type, 0, hashCodes);
var valuesField = context.Context.InitConstField(Type, 1, values);
var il = context.Il;
context.LoadField(valuesField); // stack: [values]
context.LoadObj(); // stack: [values, obj]
il.Ldc_I4(values.Length); // stack: [values, obj, values.Length]
il.Rem(true); // stack: [values, obj % values.Length]
il.Ldelem(typeof(int)); // stack: [values[obj % values.Length]]
context.LoadObj(); // stack: [values[obj % values.Length], obj]
il.Ceq(); // stack: [values[obj % values.Length] == obj]
var countAsIntLabel = il.DefineLabel("countAsInt");
il.Brfalse(countAsIntLabel); // if(values[obj % values.Length] != obj) goto countAsInt
context.LoadField(hashCodesField); // stack: [hashCodes]
context.LoadObj(); // stack: [hashCodes, obj]
il.Ldc_I4(hashCodes.Length); // stack: [hashCodes, obj, hashCodes.Length]
il.Rem(true); // stack: [hashCodes, obj % hashCodes.Length]
il.Ldelem(typeof(long)); // stack: [hashCodes[obj % hashCodes.Length] = hashCode]
il.Brfalse(countAsIntLabel); // if(hashCode == 0) goto countAsInt;
il.Ldc_I4(9); // stack: [9]
il.Ret(); // return 9;
il.MarkLabel(countAsIntLabel);
il.Ldc_I4(5); // stack: [5]
}
protected override void WriteNotEmpty(WriterMethodBuilderContext context)
{
int[] values;
ulong[] hashCodes;
EnumHelpers.BuildHashCodesTable(Type, out values, out hashCodes);
var hashCodesField = context.Context.InitConstField(Type, 0, hashCodes);
var valuesField = context.Context.InitConstField(Type, 1, values);
var il = context.Il;
context.LoadField(valuesField); // stack: [values]
context.LoadObj(); // stack: [values, obj]
il.Ldc_I4(values.Length); // stack: [values, obj, values.Length]
il.Rem(true); // stack: [values, obj % values.Length]
il.Ldelem(typeof(int)); // stack: [values[obj % values.Length]]
context.LoadObj(); // stack: [values[obj % values.Length], obj]
il.Ceq(); // stack: [values[obj % values.Length] == obj]
var writeIntLabel = il.DefineLabel("writeInt");
il.Brfalse(writeIntLabel); // if(values[obj % values.Length] != obj) goto writeInt
context.LoadField(hashCodesField); // stack: [hashCodes]
context.LoadObj(); // stack: [hashCodes, obj]
il.Ldc_I4(hashCodes.Length); // stack: [hashCodes, obj, hashCodes.Length]
il.Rem(true); // stack: [hashCodes, obj % hashCodes.Length]
il.Ldelem(typeof(long)); // stack: [hashCodes[obj % hashCodes.Length] = hashCode]
var hashCode = il.DeclareLocal(typeof(ulong));
il.Dup(); // stack: [hashCode, hashCode]
il.Stloc(hashCode); // hashCode = hashCodes[obj % hashCodes.Length]; stack: [hashCode]
il.Brfalse(writeIntLabel);
context.WriteTypeCode(GroBufTypeCode.Enum);
il.Ldc_I4(8);
context.AssertLength();
context.GoToCurrentLocation(); // stack: [&result[index]]
il.Ldloc(hashCode); // stack: [&result[index], hashCode]
il.Stind(typeof(long)); // *(int64*)&result[index] = hashCode
context.IncreaseIndexBy8(); // index = index + 8;
il.Ret();
il.MarkLabel(writeIntLabel);
context.WriteTypeCode(GroBufTypeCode.Int32);
il.Ldc_I4(4);
context.AssertLength();
context.GoToCurrentLocation(); // stack: [&result[index]]
context.LoadObj(); // stack: [&result[index], obj]
il.Stind(typeof(int)); // result[index] = obj
context.IncreaseIndexBy4(); // index = index + 4
}
