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Altera_Forum's avatar
Altera_Forum
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8 years ago

How to suppress Fatal Modelsim error vsim-3807

Is there a way to suppress a Fatal error in Modelsim? I'm guessing not, but it would be useful at times. Fore example, I've created a multiplier where one input is signed, the other unsigned, and the...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Ok, sorry - slight missunderstanding. But im afraid you're stuck with SLVs if you insist on using the megafunction. But you can still use direct instantiation so you dont need to use a component at all (but type conversions are needed).

But you should be able to infer the multipler without needing to generate anything. Why not just append a '0' to the front of your unsigned to make it signed? 


ip1 : unsigned(7 downto 0);
ip2 : signed(8 downto 0);
op : signed(17 downto 0);
...
op <= signed('0' & ip1) * ip2;