Packages

  • package root

    This is the documentation for Chisel.

    This is the documentation for Chisel.

    Package structure

    The chisel3 package presents the public API of Chisel. It contains the concrete core types UInt, SInt, Bool, FixedPoint, Clock, and Reg, the abstract types Bits, Aggregate, and Data, and the aggregate types Bundle and Vec.

    The Chisel package is a compatibility layer that attempts to provide chisel2 compatibility in chisel3.

    Utility objects and methods are found in the util package.

    The testers package defines the basic interface for chisel testers.

    Definition Classes
    root
  • package chisel3

    This package contains the main chisel3 API.

    This package contains the main chisel3 API.

    Definition Classes
    root
  • package std
    Definition Classes
    chisel3
  • BarrelShifter
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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  10. final def isInstanceOf[T0]: Boolean
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  11. def leftRotate[T <: Data](inputs: Vec[T], shift: UInt, layerSize: Int = 1): Vec[T]
  12. def leftShift[T <: Data](inputs: Vec[T], shift: UInt, layerSize: Int = 1): Vec[T]
  13. final def ne(arg0: AnyRef): Boolean
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  16. def rightRotate[T <: Data](inputs: Vec[T], shift: UInt, layerSize: Int = 1): Vec[T]
  17. def rightShift[T <: Data](inputs: Vec[T], shift: UInt, layerSize: Int = 1): Vec[T]
  18. final def synchronized[T0](arg0: => T0): T0
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  20. final def wait(arg0: Long, arg1: Int): Unit
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