how to pass a hls::mat array as a parameter of a function?

[eewse]

I need to split a big hls:mat into 49 smaller hls:mat with a function syntax similar to below

splitup(hls::mat& input, hls::mat& output[49]) {

}

it is ok to "csim" with this function but when it is "synthesized", the following errors will occur:

ERROR: [SYNCHK 200-11]  Variable 'output.data.V' has an unsynthesizable type '[49 x i24*]*' (possible cause(s): pointer to pointer or global pointer).
ERROR: [SYNCHK 200-61]  unsupported memory access on variable 'output.data.V' which is (or contains) an array with unknown size at compile time.

It is very odd to create a function with 1+49 parameters. Any advices?

Eli

[wenchen · Accepted solution]

Hi @eewse ，

    Pointers to pointers are supported for synthesis but not when used as an argument to the top-level function。

    Did you set the splitup as the top-level function?

[eewse]

@wenchen 

Many thanks

Eli