Packages

o

chisel3.std

BarrelShifter

object BarrelShifter

A Barrel Shifter implementation for Vec type.

Source
BarrelShifter.scala
Example:

  1. val input = 0xAABBCCDD.U(32.W)
val bytes = VecInit(input.asBools.grouped(8).map(VecInit(_).asUInt).toSeq)
val shamt = 1.U(2.W)
val output = BarrelShifter.leftRotate(bytes, shamt).asUInt // big endian
// output = 0xDDAABBCC.U(32.W)
// The depth of Mux is 2, whereas originally
// the depth of Mux is log(32) = 5
val output = BarrelShifter.leftRotate(bytes, shamt, 2).asUInt // depth is 1 now
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  1. final def !=(arg0: Any): Boolean
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  2. final def ##: Int
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  8. def finalize(): Unit
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  9. final def getClass(): Class[_ <: AnyRef]
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  10. def hashCode(): Int
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  11. final def isInstanceOf[T0]: Boolean
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  12. def leftRotate[T <: Data](inputs: Vec[T], shift: UInt, layerSize: Int = 1): Vec[T]
  13. def leftShift[T <: Data](inputs: Vec[T], shift: UInt, layerSize: Int = 1): Vec[T]
  14. final def ne(arg0: AnyRef): Boolean
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  15. final def notify(): Unit
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  16. final def notifyAll(): Unit
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  17. def rightRotate[T <: Data](inputs: Vec[T], shift: UInt, layerSize: Int = 1): Vec[T]
  18. def rightShift[T <: Data](inputs: Vec[T], shift: UInt, layerSize: Int = 1): Vec[T]
  19. final def synchronized[T0](arg0: => T0): T0
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  20. def toString(): String
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  21. final def wait(): Unit
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