public static bool LoadStore(bool isLoad, CilType stackTop, JavaType opcodeType,
CilType dataType, JavaCode code)
{
if (stackTop.Equals(SpanType) && code.Method.Class.Name != SpanType.ClassName)
{
string opcodeDescr;
if (opcodeType == null)
{
opcodeType = CilType.SystemValueType;
opcodeDescr = "";
// at this point we should have been called from LoadObject or
// StoreObject in CodeMisc to handle a ldobj/stobj instruction,
// so make sure the pointer-span element is a value type
if (dataType.IsGenericParameter || (!dataType.IsValueClass))
{
throw new InvalidProgramException();
}
code.NewInstruction(0x12 /* ldc */, dataType.AsWritableClass, null);
// make sure the stack has room for three parameters:
// 'this', value reference (in case of Store), and class
code.StackMap.PushStack(JavaType.ObjectType);
code.StackMap.PushStack(JavaType.ObjectType);
code.StackMap.PushStack(JavaType.ObjectType);
code.StackMap.PopStack(CilMain.Where);
code.StackMap.PopStack(CilMain.Where);
code.StackMap.PopStack(CilMain.Where);
}
else
{
if (opcodeType.Equals(JavaType.ShortType) &&
stackTop.GenericParameters != null &&
stackTop.GenericParameters[0].Equals(JavaType.CharacterType))
{
opcodeType = JavaType.CharacterType;
}
opcodeDescr = opcodeType.ToDescriptor();
}
var voidType = JavaType.VoidType;
var spanMethod = isLoad
? (new JavaMethodRef("Load" + opcodeDescr, opcodeType))
: (new JavaMethodRef("Store" + opcodeDescr, voidType, opcodeType));
if (opcodeDescr == "")
{
spanMethod.Parameters.Add(new JavaFieldRef("", JavaType.ClassType));
}
code.NewInstruction(0xB6 /* invokevirtual */, SpanType, spanMethod);
if (isLoad)
{
code.StackMap.PushStack(CilType.From(opcodeType));
}
return(true);
}
return(false);
}
