void assembleFile() {
std::ifstream in(inPath_.c_str());
if (!in) {
error("couldn't open: " + errorString());
}
while (getline(in, line_)) {
++lineNumber_;
p_ = line_.c_str();
// Handle labels.
if (isalnum(*p_)) {
handleLabel();
} else {
// Trim leading whitespace.
trimLeft();
if (*p_ == 0 || *p_ == '#') {
// Skip blank or comment lines.
} else if (*p_ == '.') {
handleDirective();
} else {
handleInstruction();
}
}
}
fixForwardBranches();
writeBytes(&code_[0], &code_[code_.size()]);
}
int instruction_cycle(CPU *cpu) {
int halted = 1;
(*cpu).ir = (*cpu).mem[(*cpu).pc];
handleInstruction(cpu);
switch ((*cpu).opcode){
case 0:
halted = 0;
printf("Halt!");
break;
case 1:
ld(cpu);
break;
case 2:
st(cpu);
break;
case 3:
add(cpu);
break;
case 4:
neg(cpu);
break;
case 5:
ldm(cpu);
break;
case 6:
addm(cpu);
break;
case 7:
br(cpu);
break;
case 8:
brp(cpu);
break;
case 9:
io(cpu);
break;
default:
printf("Error:Invalid opcode at address %d,Invalid number: %d",(*cpu).pc,(*cpu).mem[(*cpu).pc]);
break;
}
(*cpu).pc++;
return halted;
// For Lab 7, we just print a message and halt after the 10th call
//
//char suffix[][4] = {"", "st","nd","rd","th"};
//printf("Calling instruction_cycle for %d%s time\n", call_nbr, suffix[min(call_nbr,4)]);
}
