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• CombFifo.scala

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chisel.lib.fifo.CombFifo.scala Maven / Gradle / Ivy

// Author: Martin Schoeberl ([email protected])
// License: this code is released into the public domain, see README.md and http://unlicense.org/

package chisel.lib.fifo

import chisel3._

/**
  * A FIFO queue combining the memory FIFO with a single stage double buffer FIFO
  * to decouple the combinational path from the memory read port to the output.
  */
class CombFifo[T <: Data](gen: T, depth: Int) extends Fifo(gen: T, depth: Int) {

  val memFifo = Module(new MemFifo(gen, depth))
  val bufferFIFO = Module(new DoubleBufferFifo(gen, 2))
  io.enq <> memFifo.io.enq
  memFifo.io.deq <> bufferFIFO.io.enq
  bufferFIFO.io.deq <> io.deq
}