congenial-elucidator is a compiler for the xpln programming language, targeting MIPS architecture. Actually, for a slightly modified version of xpln, targeting SPIM simulator.
congenial-elucidator is written using yalalr. See the instructions there for usage.
Under the xpln/ directory, there are sample xpln programs.
Some of them are taken from Berk Özbalcı's xpln stress test.
Under mips/, there are target codes for each of the example programs, as compiled by congenial-elucidator.
- Sadly, no floating point support. Integers only.
- Function definitions at the top: Grammar was slightly modified to simplify code generation, in the new grammar function definitions come before the main body and there can be no function definitions between statements.
- Determine stack frame size dynamically. Currently, all functions have a fixed stack frame size, which is 512 bytes. Ideally, we should determine at compile time how much stack space to allocate for each function. (issue #13)
- Use unsigned arithmetic for address computations. (issue #16)
- Grammar is not LALR(1). It haven't caused any harm (yet) though; I think LALR parser generator's default decisions save me there. (issue #25)
- Return value of main is ignored. I couldn't find out how to return a value from a program in SPIM. I don't know if it's possible. (issue #24)
I would like to thank Prof. Dr. Cem Bozşahin (@bozsahin) for the awesome course! Actually, a "course" would be an understatement for this; it was more like a journey from heaven to hell and back to heaven again, all in one semester. Also see bozsahin/ceng444.
I would also like to thank Berk Özbalcı (@bozbalci) for his friendship and support, and also his xpln stress test.