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Andrew Waterman 70b677ecda Vec considered harmful; use isOneOf instead (#64)
Vec is heavyweight and really should only be used for I/O and
dynamic indexing.  A recurring pattern in uncore is

    Vec(const1, const2, const3) contains x

which is nice but has a deleterious effect on simulation copilation
and execution time.  This patch proposes an alternative:

    x isOneOf (const1, const2, const3)
    x isOneOf seqOfThings

I think it's also more idiomatic.

This is just a prototype; I'm not wed to the name or implementation.
2016-07-07 19:25:57 -07:00

12 lines
258 B
Scala

package uncore
import Chisel._
package object Util {
implicit class UIntIsOneOf(val x: UInt) extends AnyVal {
def isOneOf(s: Seq[UInt]): Bool = s.map(x === _).reduce(_||_)
def isOneOf(u1: UInt, u2: UInt*): Bool = isOneOf(u1 +: u2.toSeq)
}
}