On: Designing a RISC-V CPU in VHDL: Arty S7 RPU SoC

At Lockheed Martin I worked on a SIMD processor designed before VHDL and Verilog existed. The reference design was written in a lisp-like language. I don't know if the language had a name or if it was ever publicized in any way.

I'm curious to know more. Maybe some form/relative/precursor of EDIF (https://en.wikipedia.org/wiki/EDIF)? Not exactly Lisp, but an S-expression based format for describing netlists.

The DDD system was used in quite a few projects:

https://www.cs.indiana.edu/pub/techreports/TR544.pdf

May have been that one. If not, yall might still find it interesting.