Examples of org.allspice.bytecode.instructions.IfEquals0

Package org.allspice.bytecode.instructions

Examples of org.allspice.bytecode.instructions.IfEquals0

org.allspice.bytecode.instructions.IfEquals0
Transfers execution to another spot if top stack item is equal to 0 (S,A) => (S) @author egoff

    Var x = new Var(i1,new TypeName(type)) ;
    MethodDef md = new MethodDef(TypeName.BOOLEAN,"meth",x) ;
    Mark one = new Mark() ;
    md = md.addInstructions(
        new Load(x),
        new IfEquals0(TypeCode.getType(type),one),
        new Const(false),
        new Return(TypeCode.BOOLEAN),
        new Nop(one),
        new Const(true),
        new Return(TypeCode.BOOLEAN)

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  public static void createAnd(EvaluationContext context,
      final Expr lhs, final Expr rhs, InstList l) throws CompilerException {
    Mark isZero = new Mark() ;
    Mark end = new Mark() ;
    context.compile(null,lhs, l) ;
    l.add(new IfEquals0(context.getTypeCode(lhs),isZero)) ;
    context.compile(null,rhs, l) ;
    l.add(new IfEquals0(context.getTypeCode(rhs),isZero)) ;
    l.add(new Const(Boolean.TRUE)) ;
    l.add(new Goto(end)) ;
    l.add(new Nop(isZero)) ;
    l.add(new Const(Boolean.FALSE)) ;
    l.add(new Nop(end)) ;

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    TypeCode t1 = condTable.get(new TypePair(td1.getTypeCode(),td2.getTypeCode())) ;
    TypeName type = (t1 != null) ? TypeName.valueOf(t1) : null ;
    context.compile(null,cond, l) ;
    Mark endmark = new Mark() ;
    Mark elsemark = new Mark() ;
    l.add(new IfEquals0(context.getTypeCode(cond),elsemark)) ;
    createConvert(context, thenst, type,l) ;
    l.add(new Goto(endmark)) ;
    l.add(new Nop(elsemark)) ;
    createConvert(context, elsest, type,l) ;
    l.add(new Nop(endmark)) ;

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    Mark beginmark = new Mark() ;
    Mark endmark = new Mark() ;
    EvaluationContext newContext = context.setBreak(endmark).setContinue(beginmark) ;
    l.add(new Nop(beginmark)) ;
    context.compile(null,cond, l) ;
    l.add(new IfEquals0(context.getTypeCode(cond),endmark)) ;
    for(Statement s: thenst) {
      newContext.compile(s,l) ;
    }
    l.add(new Goto(beginmark)) ;
    l.add(new Nop(endmark)) ;

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  public static void createIfThenElse(EvaluationContext context,Expr cond,
      Collection<Statement> thenst,Collection<Statement> elsest, InstList l) throws CompilerException {
    context.compile(null,cond, l) ;
    Mark endmark = new Mark() ;
    Mark elsemark = new Mark() ;
    l.add(new IfEquals0(context.getTypeCode(cond),elsemark)) ;
    for(Statement st: thenst) {
      context.compile(st,l) ;
    }
    l.add(new Goto(endmark)) ;
    l.add(new Nop(elsemark)) ;

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  public static void createNot(EvaluationContext context, Expr e, InstList l) throws CompilerException {
    context.compile(null,e, l) ;
    Mark isZero = new Mark() ;
    Mark end = new Mark() ;
    l.add(new IfEquals0(context.getTypeCode(e),isZero)) ;
    l.add(new Const(Boolean.FALSE)) ;
    l.add(new Goto(end)) ;
    l.add(new Nop(isZero)) ;
    l.add(new Const(Boolean.TRUE)) ;
    l.add(new Nop(end)) ;

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Related Classes of org.allspice.bytecode.instructions.IfEquals0

org.allspice.bctojvm.test.TestIFEQ0

org.allspice.structuredtobc.StdJavaExpressions

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