@Override
public void emitCode(GluonOutput code) {
// Creae labels
String labelStart = GluonLabels.createLabel(first, "start");
String labelEnd = GluonLabels.createLabel(first, "end");
GluonLabels.addEndLabel(labelEnd);
code.comment("While Statement");
code.label(labelStart);
testExp.emitCode(code);
code.code("TEST AL, AL ;EAX, EAX");
code.code("JZ " + labelEnd);
statements.emitCode(code);
code.code("JMP " + labelStart);
code.label(labelEnd);
code.comment("End While");
GluonLabels.removeEndLabel(labelEnd);
}
@Override
public void emitCode(GluonOutput code) {
code.comment("Function: " + funcName.getValue());
String funcLabel = GluonFunction.getLabel(funcName.getValue());
// Setup variables passed in on stack for use
int offset = 4; // + 4 * parameters.size();
int used = 4;
for (Variable parameter : parameters) {
int stackOffset = offset + used;
used += 4;
code.code(parameter.getLabel() + " EQU EBP + " + stackOffset);
}
// Function
code.label(funcLabel);
// Push BP
code.code("PUSH EBP");
// Mov BP, SP
code.code("MOV EBP, ESP");
// Local variables
scope.emitCreateScope(code);
// Push all reg
code.code("PUSH EAX");
code.code("PUSH EBX");
code.code("PUSH ECX");
code.code("PUSH EDX");
// Actual function logic
code.comment("Function code start");
logic.emitCode(code);
code.comment("Function code end");
// Pop all reg
code.code("POP EDX");
code.code("POP ECX");
code.code("POP EBX");
code.code("POP EAX");
// Local variables
scope.emitDistroyScope(code);
// Pop BP
code.code("POP EBP");
// Ret paramaters
code.code("RET");
scope.buildRestore(code, parameters, true);
code.comment("Function end: " + funcName.getValue());
}