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Altera_Forum
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13 years ago

No paths found for timing analysis

When I compile the following code, the compilation proceeds successfully, but the classic timing analyser of quartus generates the warning "Warning: No paths found for timing analysis". The RTL view...
Altera_Forum's avatar
Altera_Forum
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13 years ago

I think, I have figured out what the problem is. Truly, the problem does not depend on a particular operation (e.g., subtraction). It rather depends on the "length" of equation. I have tried different combinations of the operations. As long as I have 4 operations, the project compiles successfully with the settings I have in Quartus-II ver 9.1. However, as soon as I add one operation more, the tool fails. Furthermore, if I split up the equation into two processes as was proposed by kaz, then no problem with extra operations occurs.

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I still get the same warning with the new architecture code.

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I think, FvM experienced the same issue when tried compiling the simplified example.

Therefore, it seems there is some preference or limitation for timing analyser on the length of operations involved in one formula.

Thank you for helping me with this issue!