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Altera_Forum
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16 years ago

numeric_std Vs. std_logic_arith packages

Hello, Usually I work with std_logic_aritch and I include the package signed or unsigned according with what I need. I find that using std_logic_arith allows me to develop code that is eas...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

The problem is, that ieee.numeric_std has been introduced late. So the "non-standard" "ieee".std_logic_arith is still used at many companies that ones started with this synopsys originated lib. Altera does exclusively in all VHDL code, as far as I'm aware of.

I agree about the limited use of the unsigned/signed libraries. The basic std_logic_arith library hasn't serious disadavantages in my opniuon, besides being non-standard.