public override void ExitAssign2(ssuplParser.Assign2Context context)
{
// assign ``:`` ID DOT FIELD EQ expr
//Console.WriteLine("Exitassign2");
string vname = context.ID().GetText();
if (!symtable.Contains(vname))
{
throw new Exception("Undeclared variable: " + vname);
}
if (type(context.expr()) != VarType.DOUBLE || symtable.Get(vname).type != VarType.VEC4)
{
throw new Exception("Variable type mismatch in assignment");
}
VarType vtype = symtable.Get(vname).type;
int vsizeInQuads = SizeForType(vtype) / 8;
ASM asmcode = new ASM();
asmcode += code.Get(context.expr());
asmcode += "pop rax";
string lbl = symtable.Get(vname).location;
switch (context.FIELD().GetText())
{
case ".x":
asmcode += $"mov [{lbl}+{0}], rax";
break;
case ".y":
asmcode += $"mov [{lbl}+{8}], rax";
break;
case ".z":
asmcode += $"mov [{lbl}+{16}], rax";
break;
case ".w":
asmcode += $"mov [{lbl}+{24}], rax";
break;
}
code.Put(context, asmcode);
typeAttr.Put(context, vtype);
}
/// <summary>
/// Exit a parse tree produced by the <c>assign2</c>
/// labeled alternative in <see cref="ssuplParser.assign"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitAssign2([NotNull] ssuplParser.Assign2Context context)
{
}
