ParaC

ParaC is a small C-like compiler.

Features

• Emits x86 asm (32 bit code).
• Has OpenMP-style parallel loops.
• Uses SSE for floating point arithmetic.
• Follows CDECL (ie the output is compatible with GCC-compiled C code).
• Support library includes printint and printfloat functions.
• Nice error messages with errors underlined in the source

How it works

• Uses ANTLR4.
• Compiles in one pass.
• Can buffer asm output to reorder it if needed.
• Pushes every expression value on the stack.
• Uses pthreads for parallel loops.

How to use

To compile a program:

./ParaC.sh sample.c >sample.s
gcc -m32 sample.s src/ParaC.c -lpthread
./a.out

Use the test.sh script to do that in one command:

./test.sh sample.c # creates a.out.s then a.out and runs a.out

Future improvements

• Avoid successive push/pop inside an expression.
• Enable 64 bit mode.
• String support