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Altera_Forum
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12 years ago

Polynomial Evaluation

Hello, I'm totally new to VHDL and i'm trying to do a polynonamial evaluation. In particular I have a signed 16 bit value (x) and I want to obtain y=d*x^3+c*x^2+b*x+a. I have created a sig...
Altera_Forum's avatar
Altera_Forum
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12 years ago

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@Kaz, I need only 16 bit at the final sum as I have a 16 bit dac so at the output of the polynomial I MUST have a 16 bit signal.

So as I have understood from your last post I do not need the leading zeros in the signals input of the sum and also at the output signal.. Am I right ?

Thank you for your time !

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you are right.

with only 16 bit resolution you are dealing with scaled down result(not absolute values).

A constant term must also be scaled down by 2^16 before entering addition and so you can just ignore it.