hpcguy / taxtorcher

Rough estimate of USA income tax across states to trade off relocation and retirement income

Curated collection of tiny C compilers, all written in C:

• MarcFeeleyTinyc -- ( 284 SLOC )
  • lex -> parse to ast -> compile ast to bytecode -> execute on VM
• rswier/c4 -- ( 499 SLOC )
  • Can interpret itself.
• EarlGray/c4 -- (550) SLOC
  • Github won't let me fork this repo since its derived from c4, but it is a tiny x86 JIT compiler
• jserv/amacc -- ( 2366 SLOC )
  • Generates and executes ARM assembly by JIT compile or creating ELF executable. Can compile itself. This is the base compiler forked for Squint.
• HPCguy/Squint -- (3250 SLOC compiler, 3750 SLOC optimizer)
  • JIT + ELF + shared object optimizer. Near gcc -O1 performance, and surprisingly close to -O3 for some problems. Barely even started optimizing, so this could get interesting.

A Python to Linux x86 compiler (that can call libc functions), used as an example, not to support all of Python:

• HPCguy/pyast64
  • forked from BenHoyt/pyast64 and extended for C language support.

General:

• 👀 I’m interested in High Peformance Computing. I sat on several physics application teams in my 20 year career and I'm an expert at parallel efficiency. (See https://docs.google.com/viewer?a=v&pid=sites&srcid=bGJsLmdvdnxwYWRhbC13b3Jrc2hvcHxneDo2NWNiM2Y2MDg5ZTZiZTcy )
• 🌱 I’m currently learning to write a compiler. I know what features are missing in HPC languages and compilers, but have no experience writing a compiler.
• 💞️ I’m looking to collaborate on a new language for HPC efficiency. Almost every parallel language has been written by academics, not HPC app developers. This has been a mistake. I know how to write a language with parallel semantics but with a sequential look and feel. I was one of the two original co-developers of the RAJA framework used by the Department of Energy, but due to limitations in the C language, that framework and any other like it will never be efficient. Converting everything to pointers before applying optimizations is a mistake that can only be corrected at the language level by jettisoning the system programming semantics found in the C language definition.