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CMM Compiler

Almost the whole codebase of the project was written in the 2nd semester (1st year) of study at MIPT.

CMM Compiler is an advanced version of CMM language pack with translation program-code directly to executable file .exe.

CMM Syntax

All the syntax is written here. But there are some important changes:

  1. Instead of double type of every variable int is used.
  2. Because of usage of general registers there is no sense to keep such functions as sin, ..., ln, because they work only with double values. So all trigonometric, hyperbolic functions are removed, exp and ln are removed. They are just ignore while generating executable file, so all responsibility lies with you, if something doesn't work because of it.
  3. At the same time the only expression type in deriv function is a polynomial, that's why this function is removed too because of its diminishing its meaning.
  4. Operator ^ and function power are removed, because CPU doesn't support power instructions (do it manually).

Despite the fact that there are a lot of changes, CMM is still full-Turing language.

General functionality

With considering all changes in syntax frontend, optimizer and reversed frontend are used in the same way, as in old CMM version.

Backend

This part of CMM language is worth separate consideration, because there are a lot of changes.

First of all, now there is no such strata between program and executable file as assembly code. Now all CMM program compiles directly into .exe file. Also executable code is analyzed by CPU directly, without any interaction with other program, such as nCPU like in old version.

All generated programs are always 32 bit.

Functions print and scan are supported by sfasmlib.dll library (Simple and Fast Assembler Library), which imports PrintNumber and GetNumber functions and uses kernel32.lib. Also this library imports ExitProgram, which calls ExitProcess function.

How is was already noticed, the usage of CMM language is the same except compilation:

./lang_compile.exe program.tree program.exe

Compilation && Usage

First, you should build the project. Clone current repository:

git clone --recurse-submodules https://github.com/Vokerlee/CMM-Compiler.git

Then enter cloned repository and create build directory and use cmake like this:

mkdir build && cd build
cmake ..

Now you can use any build system you desire (like Ninja) and build the project.

General boost

On the average now CMM compiled program executes 2500 times faster than old version because of many reasons.