private void codeClassObjTable() {
str.println("\n# Class Object Table");
str.print(CgenSupport.CLASSOBJTAB + CgenSupport.LABEL);
for (Object obj : nds) {
AbstractSymbol className = ((CgenNode) obj).getName();
// code prototype object reference
str.print(CgenSupport.WORD);
CgenSupport.emitProtObjRef(className, str);
str.println();
// code initializer reference
str.print(CgenSupport.WORD);
CgenSupport.emitInitRef(className, str);
str.println();
}
}
private void codeObjInits() {
str.println("\n# Object Initializers");
for (Object obj : nds) {
CgenNode nd = (CgenNode) obj;
// code object initailzers (constructor method)
CgenSupport.emitInitRef(nd.getName(), str);
str.print(CgenSupport.LABEL);
nd.codeObjInit(str);
}
}
private void codeDispTables() {
str.println("\n# Dispatch Tables");
for (Object obj : nds) {
CgenNode nd = (CgenNode) obj;
// code class method reference
CgenSupport.emitDispTableRef(nd.getName(), str);
str.print(CgenSupport.LABEL);
nd.codeDispTab(str);
}
}
private void codeProtObjs() {
str.println("\n# Prototype Objects");
for (Object obj : nds) {
CgenNode nd = (CgenNode) obj;
// code class attributes
str.println(CgenSupport.WORD + "-1"); // GC tag
CgenSupport.emitProtObjRef(nd.getName(), str);
str.print(CgenSupport.LABEL);
nd.codeProtObj(str);
}
}
/** Emits code to start the .text segment and to declare the global names. */
private void codeGlobalText() {
str.println("\n# Global Text");
str.println(CgenSupport.GLOBAL + CgenSupport.HEAP_START);
str.print(CgenSupport.HEAP_START + CgenSupport.LABEL);
str.println(CgenSupport.WORD + 0);
str.println("\t.text");
str.print(CgenSupport.GLOBAL);
CgenSupport.emitInitRef(TreeConstants.Main, str);
str.println("");
str.print(CgenSupport.GLOBAL);
CgenSupport.emitInitRef(TreeConstants.Int, str);
str.println("");
str.print(CgenSupport.GLOBAL);
CgenSupport.emitInitRef(TreeConstants.Str, str);
str.println("");
str.print(CgenSupport.GLOBAL);
CgenSupport.emitInitRef(TreeConstants.Bool, str);
str.println("");
str.print(CgenSupport.GLOBAL);
CgenSupport.emitMethodRef(TreeConstants.Main, TreeConstants.main_meth, str);
str.println("");
}
/** Emits code to start the .data segment and to declare the global names. */
private void codeGlobalData() {
// The following global names must be defined first.
// set FP offset to be below SP by 1
fpOffset = 0;
str.println("\n# Global Data");
str.print("\t.data\n" + CgenSupport.ALIGN);
str.println(CgenSupport.GLOBAL + CgenSupport.CLASSNAMETAB);
str.print(CgenSupport.GLOBAL);
CgenSupport.emitProtObjRef(TreeConstants.Main, str);
str.println("");
str.print(CgenSupport.GLOBAL);
CgenSupport.emitProtObjRef(TreeConstants.Int, str);
str.println("");
str.print(CgenSupport.GLOBAL);
CgenSupport.emitProtObjRef(TreeConstants.Str, str);
str.println("");
str.print(CgenSupport.GLOBAL);
BoolConst.falsebool.codeRef(str);
str.println("");
str.print(CgenSupport.GLOBAL);
BoolConst.truebool.codeRef(str);
str.println("");
str.println(CgenSupport.GLOBAL + CgenSupport.INTTAG);
str.println(CgenSupport.GLOBAL + CgenSupport.BOOLTAG);
str.println(CgenSupport.GLOBAL + CgenSupport.STRINGTAG);
// We also need to know the tag of the Int, String, and Bool classes
// during code generation.
str.println(CgenSupport.INTTAG + CgenSupport.LABEL + CgenSupport.WORD + intclasstag);
str.println(CgenSupport.BOOLTAG + CgenSupport.LABEL + CgenSupport.WORD + boolclasstag);
str.println(CgenSupport.STRINGTAG + CgenSupport.LABEL + CgenSupport.WORD + stringclasstag);
}
