Please help me, Write a VHDL code

[nguyensum]

Hi everybody,
Please help me write a VHDL code to compute the following
polynomial equation: y=a5*X^5+a4*X^4+a3*X^3+a2*X^2+a1*X+a0
Simulation Quartus II

Thanks so much! 

[0xdeadbeef]

Multiplication and addition should be directly supported by VHDL (at least for integer types). I guess all you need to do is to replace the "power of" by multiplication. E.g. replace X^3 by X*X*X etc.
Of course it would be clever to use a local signal for this and multiply it by X each timer you need a higher potency.

Then again, calculating a polynomial with integer types doesn't make so much sense honestly. If you need a "real" (floating point) type, this will get much more complicated. If you're using fixed point numbers, a normalizing division is needed for each multiplication.

[Edit]
There is also a package for fixed point calculation named "IEEE.Fixed_Pkg"
In theory, also a package for float calculations exists, namely "IEEE.Float_Pkg", but not every tools supports it and even if so, it creates very large and very slow blocks.

[Edit]
Google shows that while Quartus can't synthesize real multiplications etc., there are so called megafunctions for this:
http://www.altera.com/literature/ug/ug_altfp_mfug.pdf

[nguyensum]

Thanks you so much!
You share for me document very good.
Can you help me, please!
Write a VHDL code to perform the function of multiplier which the inputs are from Dip Switch and outputs display to 7-segment LED with BCD.
X : dip 1~4 represents value 0~15, display on 2 led seven segment 
Y : dip 5~8 represents value 0~15, display on 2 led seven segment
A=X*Y display on 4 led seven segment

Thanks you so much 

[Zad]

You seem to be mistaking EEVBlog for a do-your-homework service.

[Simon]

This topic will now be locked. I contacted the op asking him not to post homework.