representation of equation in vhdl

[Altera_Forum]

sir, 

 how can write l{n-(N-1)/2}l in vhdl???

[Altera_Forum]

If n is an unsigned, signed or integer signal or variable and N is a constant, you can simply write the expression. Refer to a VHDL text book.

[Altera_Forum]

sir, i want the mod value of this expression,for example,if the output is -4,i should have it as +4,etc.

[Altera_Forum]

you can use the abs() function for that purpose. It should work on both integer and unsigned types.