Simple Lang Compiler

SimpleLang is a minimalistic high-level language designed to run on an 8-bit CPU. It includes basic constructs such as variable declarations, assignments, arithmetic operations, and conditional statements, but it does not include loops. This language aims to be easy to understand and implement for educational purposes.

How to use?

Build the compiler

git clone url
cd SimpleLang
make

Running compiler

./simplelang input_file output_file

example -

./simplelang addition.simpl addition.asm

Language Syntax

Variable Declaration

int a; 			//declaring vairable without initialization.
int b = 0;  	//intiailization vairable

Variable intialization

int a;
a = 5; 	//initilization vairable after declaring it.

Arithmetic Operations

//Addition
int a = 9;
int b = 10;
a = a + b; 	//Adding content of a and b and saving it in a.
//Subtraction
int c = 10;
int d = 5;
c = c - d;	//Subtracting d from c and storing it in c.

It also supports complex arithmetic expressions

int a = 3;
int b = (5 + 6) - a;
int c = a + ((9 + a) - 1 ) + b;

If statements

Equals

int a = 0;
int b = 10;
if(a == b){   //if a is equals to b, store 10 in a.
    a = 10;
}

Not Equals

int a = 0;
int b = 10;
if(a != b){ //if a is not equals to b, store 0 in b
    b = 0;
}

Check test folder for more examples.

Language Constraints

• Multiplication and Divisions are not allowed (right now).
• Size of variable is 1 Byte (8bit) because of 8 bit CPU arch.
• Negative numbers are not allowed (right now). Because of CPU arch. limitations.
• <, <=, >, >= are not allowed because there are no CPU instructions.

Documentation

Build docks First install Doxygen

make doxygen

This will build documentation in docs folder. Just open index.html file in browser.

TODO

• Adding (software) support for Negative numbers.
• Adding support for more comparison operators

Reference

8 Bit CPU Simulator