public override void Visit(PutStat putStat)
{
int thisFrameSize = this.FunctionScope.GetStackFrameSize();
char putFunctionChar = 'i';
if (putStat.Expression.SemanticalType == "float")
{
putFunctionChar = 'f';
}
string putFunction = $"put{putFunctionChar}_func";
this.LoadAndStore(putStat.Expression, thisFrameSize + 4, putStat.Expression.NodeMemorySize, $"Store the put value of {putStat.Expression}");
InstructionStream.Add($"addi r14, r14, {thisFrameSize}");
InstructionStream.Add($"jl r15, {putFunction}");
InstructionStream.Add($"subi r14, r14, {thisFrameSize}");
}
private object NoASS()
{
string first = "if for get put return";
this.SkipErrors(first);
var lookaheadToken = this.TokenStream.Peek();
string lookahead = lookaheadToken.AToCCFormat();
if ("if".HasToken(lookahead))
{
this.ApplyDerivation("noASS -> 'if' '(' expr ')' 'then' statBlock 'else' statBlock ';'");
var ifStatement = new IfStat(lookaheadToken.SourceLocation);
Match("if");
Match("(");
var expr = Expr();
Match(")");
Match("then");
var trueBlock = StatBlock();
Match("else");
var elseBlock = StatBlock();
Match(";");
ifStatement.Condition = expr;
ifStatement.TrueBlock = trueBlock;
ifStatement.ElseBlock = elseBlock;
return(ifStatement);
}
if ("for".HasToken(lookahead))
{
this.ApplyDerivation("noASS -> 'for' '(' type 'id' '=' expr ';' relExpr ';' assignStat ')' statBlock ';'");
var forStat = new ForStat(lookaheadToken.SourceLocation);
Match("for");
Match("(");
string type = Type();
var idLocation = this.TokenStream.Peek().SourceLocation;
string id = Match("id");
Match("=");
var initExpr = Expr();
Match(";");
var condition = RelExpr();
Match(";");
var assignStat = AssignStat();
Match(")");
var statBlock = StatBlock();
Match(";");
forStat.Type = type;
forStat.Id = id;
forStat.Initialization = initExpr;
forStat.Condition = condition;
forStat.Update = assignStat;
forStat.LoopBlock = statBlock;
forStat.IdLocation = idLocation;
return(forStat);
}
if ("get".HasToken(lookahead))
{
this.ApplyDerivation("noASS -> 'get' '(' variable ')' ';'");
var getStatement = new GetStat(lookaheadToken.SourceLocation);
Match("get");
Match("(");
var variable = Variable();
Match(")");
Match(";");
getStatement.Variable = variable;
return(getStatement);
}
if ("put".HasToken(lookahead))
{
this.ApplyDerivation("noASS -> 'put' '(' expr ')' ';'");
var putStatement = new PutStat(lookaheadToken.SourceLocation);
Match("put");
Match("(");
var expr = Expr();
Match(")");
Match(";");
putStatement.Expression = expr;
return(putStatement);
}
if ("return".HasToken(lookahead))
{
this.ApplyDerivation("noASS -> 'return' '(' expr ')' ';'");
var returnStatement = new ReturnStat(lookaheadToken.SourceLocation);
Match("return");
Match("(");
var expr = Expr();
Match(")");
Match(";");
returnStatement.ReturnValueExpression = expr;
return(returnStatement);
}
return(null);
}
public virtual void Visit(PutStat putStat)
{
}
