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Evaluation of elaborate function error in HDL coder

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paul b
paul b on 16 Aug 2019
Answered: Kiran Kintali on 10 May 2020
I get the following error when trying to generate HDL from a simulink model with HDL Coder:
Error: Evaluation of elaborate function on class hdldefaults.NonRestoreDivide failed with the error message: MATLAB:UndefinedFunction: Undefined function 'Signed' for input arguments of type 'hdlcoder.tp_single'.
The model runs fine in simulink. I cannot find anything helpful about any terms in this message and no link is given to any specific point in the model. I first got the error when I added a number of single precision floating point multilpy and divide blocks into the design. I reworked it to use all multiplies and a single reciprocal block but still get the same problem. I am using prelease matlab 2019b. What is the root of the problem and is there some way to track it down to a specific point in the design?

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paul b
paul b on 20 Aug 2019
All the product blocks used the Shift-Add architecture. Switching back to Linear eliminates the error. Still not clear what exactly is happening.

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Answers (2)

Nishant Gupta
Nishant Gupta on 10 May 2020

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Kiran Kintali
Kiran Kintali on 10 May 2020
This seems like a general guidance and unrelated to the internal HDLCoder error. Please see my answer to the question.

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Kiran Kintali
Kiran Kintali on 10 May 2020
This is an unexpected error from HDLCoder. Will it be possible to share the model? We can evaluate and provide the workaround.

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