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Run-time configuration of sc_signal<sc_fix> wordlength


Marco Breiling
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Dear all,

I have a question similar to https://forums.accellera.org/topic/2126-genericruntime-specification-of-ports/

I want to sweep through a set of wordlengths in a design space exploration task, i.e. test whether the system (including functional behaviour of the algorithm) works with signals of type sc_fix with e.g. 3 integer + 3 fractional bits, 2+4 or 4+2. All with the same build target (i.e. without re-compiling every time), i.e. the word lengths of the signals and corresponding module ports should be read from a file and then be used in the constructors (of the signals, and module-ports) at run-time.

However, I did not succeed. My approach was to pass the wordlengths of the sc_fix to the constructor of sc_signal (or the port), but there is apparently no sc_signal, sc_in, … constructor that accepts this additional input.

My next approach was, that the sc_signal<sc_fix> can apparently be configured by the current context parameters, when it is constructed. When I have ports in a module, however, they are constructed “en bloc” (during module construction) and I cannot set the context for each port individually. So this approach does not work either.

Do you maybe have an idea how to solve the problem?

Many thanks in advance,

 

Marco

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