How to assign large constant (Declearing large constant value ) - chisle

[riaz mian]

Here is my code:


val BaseBillion64PP = Reg(Vec(Seq.fill(4)(0.U(64.W))))
val BaseBillion32PP = Reg(Vec(Seq.fill(4)(0.U(32.W))))

val Billion = 1000000000.U
val Magic  = 2305843009.U    
val hop_1  = BaseBillion64PP(0)>>29.U
val est_1  = (hop_1*Magic)>>32.U
 BaseBillion32PP(1) :=  (BaseBillion64PP_1 - (est_2*Billion))

it shows the following error

integer number too large
[error]             Magic   := 2305843009.U 

my question how can i run the expression (hop_1*Magic)>>32.U and the value should be 2305843009

[Claford Lawrence]

Use BigInt.

val Billion = BigInt("1000000000", 10).U

[sajjad ahmed]

You can use long type of Scala by placing L at the end of any long Int value

E.g

Val variable = 409678L.U

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[riaz mian]

It works thanks