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Altera_Forum
Honored Contributor
Honored ContributorDecimal point arithmetic
Hi, I am trying to do some math involving degrees for my program. I have two values A and B, both 8 bit Std_logic_vector. I need to calculate the angle given by arctan(B/A). Since this is a very expe...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- Its quite straight forward if you use the fixed point package from www.vhdl.org/fphdl as simple as: b <= a* to_sfixed(2.41421, 3, -4); -- 4 bits integer 4 bits fractional --- Quote End --- Hi, this seems like the best way to go ahead for this! The page says it bridges the gap between VHDL-93 and VHDL-2008. If i directly use VHDL-2008 is there native support for fixed point already in the language? Would you be able to tell me how i can include this package in my quartus project when i compile? If i try to download the file and include it in my project i get an error saying library IEEE does not contain primary unit "fixed_pkg"
