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Altera_Forum's avatar
Altera_Forum
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14 years ago

floating point operating in vhdl (fixed_pkg)

Hi all; I have write a code using fixed_pkg. It compile successfully in quartus, but when I try to simulate in ModelSim an error occur. ------------------------------------------------------...
Altera_Forum's avatar
Altera_Forum
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8 years ago

if you put it in work - then you will have to compile it into work youself and you wont get the nice accelerated version modelsim uses, and it wont be the 2008 version (which is where fixed_point was introduced). The version you have for quartus is a 1993 compatible version written by David Bishop (the author of the 2008 version) - but it is not an official VHDL standard.

Why not just do it properly and compile it into ieee in quartus (you can assign a library to it) and then in quartus you can just use the version that is already included in Modelsim, as it has supported the fixed_point package for a long time (from 6.6 onwards, and probably a bit before). And since about version 10.0 it has supported 2008.