C compiler supporting arbitrary bit width integral datatypes?

Hello everyone,


    I am working on a project, where we are trying to make a development
environment for new ASIP processor design. This project, among other
parts, contains compiler and simulator generator. For these two
parts, I would need some C compiler, that supports arbitrary bit-width
integers.


For the simulator, we need to generate code that simulates registers
of arbitrary bit width and for compiler generator, we would need to
optimize C code that describes instruction's behavior to extract
instruction selectrion rule for each instruction,


Have you heard or read about such compiler? (any references would be
useful)


P.S.: So far, I have found Valen-C project (quite old, not made it
work yet), then I tried the clang frontend (it seems that to implement
support would be quite problematic but not impossible) and also I am
going to try some synthetizers that generate HW from C code.

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