[racket] Racket and FPGA

Anyone have some neat Racket-based tools for FPGA development?

I have a tentative FPGA project, for number-crunching, and almost 
certainly will be hand-tuning the HDL to squeeze every ounce of 
performance I can get, so I'm not interested right now in a Racket VM or 
a compiler.  But if someone has other tools (sexp syntax for full HDL, 
plus macros?), I'd be interested.

Neil V.