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Altera_Forum
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11 years ago

Decimal 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...
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Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

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