constant integer to unsigned casting

Limor

Junior Member

Join Date: Mar 2011

Posts: 1

03-22-2011

Hi
I'm running a benchmark between Modelsim and active HDL.
I have the following code compiled on Active HDL:

addr := unsigned(x"1");

When I run it on Modelsim, it requires a ' sign after the unsigned , in order to compile. So in Modelsim it looks like this:

addr := unsigned'(x"1");

This expression also compiles on Active HDL.

Can any body explain why do I need this ' sign?

Thanks
Limor

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