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Handle function commands

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Hazem Krimi
2024-05-06 18:36:25 +01:00
parent 0171464197
commit e0ef0a9850
6 changed files with 178 additions and 29 deletions
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include/functions.h
+139
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@@ -0,0 +1,139 @@
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
string translateFunction(string name, int args) {
stringstream output;
output << "(" << name << ")" << endl;
for (int i = 0; i < args; ++i) {
output << "@0" << endl;
output << "D=A" << endl;
output << "@SP" << endl;
output << "A=M" << endl;
output << "M=D" << endl;
output << "@SP" << endl;
output << "M=M+1" << endl;
}
return output.str();
}
string translateCall(string name, int args) {
stringstream output;
string label = name + "$ret" + generateRandomLabel(3);
vector<string> frame = { "LCL", "ARG", "THIS", "THAT" };
output << "@" << label << endl;
output << "D=A" << endl;
output << "@SP" << endl;
output << "A=M" << endl;
output << "M=D" << endl;
output << "@SP" << endl;
output << "M=M+1" << endl;
for (const string &segment : frame) {
output << "@" << segment << endl;
output << "D=M" << endl;
output << "@SP" << endl;
output << "A=M" << endl;
output << "M=D" << endl;
output << "@SP" << endl;
output << "M=M+1" << endl;
}
output << "@SP" << endl;
output << "D=M" << endl;
output << "@LCL" << endl;
output << "M=D" << endl;
output << "@SP" << endl;
output << "D=M" << endl;
output << "@R" << endl;
output << "M=D" << endl;
output << "@5" << endl;
output << "D=A" << endl;
output << "@R" << endl;
output << "M=M-D" << endl;
output << "@" << args << endl;
output << "D=A" << endl;
output << "@R" << endl;
output << "M=M-D" << endl;
output << "D=M" << endl;
output << "@ARG" << endl;
output << "M=D" << endl;
output << "@R" << endl;
output << "@" << name << endl;
output << "0;JMP" << endl;
output << "(" << label << ")" << endl;
return output.str();
}
string translateReturn() {
stringstream output;
output << "@LCL" << endl;
output << "D=A" << endl;
output << "@END_FRAME" << endl;
output << "M=D" << endl;
output << "@RETURN_ADDR" << endl;
output << "M=D" << endl;
output << "@5" << endl;
output << "D=A" << endl;
output << "@RETURN_ADDR" << endl;
output << "M=M-D" << endl;
output << "@ARG" << endl;
output << "D=M" << endl;
output << "@ADDR" << endl;
output << "M=D" << endl;
output << "@SP" << endl;
output << "M=M-1" << endl;
output << "A=M" << endl;
output << "D=M" << endl;
output << "@ADDR" << endl;
output << "A=M" << endl;
output << "M=D" << endl;
output << "@ARG" << endl;
output << "D=M+1" << endl;
output << "@SP" << endl;
output << "M=D" << endl;
output << "@END_FRAME" << endl;
output << "D=M" << endl;
output << "@1" << endl;
output << "D=D-A" << endl;
output << "@THAT" << endl;
output << "M=D" << endl;
output << "@END_FRAME" << endl;
output << "D=M" << endl;
output << "@2" << endl;
output << "D=D-A" << endl;
output << "@THIS" << endl;
output << "M=D" << endl;
output << "@END_FRAME" << endl;
output << "D=M" << endl;
output << "@3" << endl;
output << "D=D-A" << endl;
output << "@ARG" << endl;
output << "M=D" << endl;
output << "@END_FRAME" << endl;
output << "D=M" << endl;
output << "@4" << endl;
output << "D=D-A" << endl;
output << "@LCL" << endl;
output << "M=D" << endl;
output << "@RETURN_ADDR" << endl;
output << "0;JMP" << endl;
return output.str();
}