Packages

o

chisel3.util

PopCount

object PopCount extends PopCountObjIntf

Returns the number of bits set (value is 1 or true) in the input signal.

Source
Bitwise.scala
Example:

  1. PopCount(Seq(true.B, false.B, true.B, true.B))  // evaluates to 3.U
PopCount(Seq(false.B, false.B, true.B, false.B))  // evaluates to 1.U

PopCount("b1011".U)  // evaluates to 3.U
PopCount("b0010".U)  // evaluates to 1.U
PopCount(myUIntWire)  // dynamic count
Linear Supertypes
PopCountObjIntf, AnyRef, Any
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Inherited
  1. PopCount
  2. PopCountObjIntf
  3. AnyRef
  4. Any
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Visibility
  1. Public
  2. Protected

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. def _applyImpl(in: Bits)(implicit sourceInfo: SourceInfo): UInt
    Attributes
    protected
  5. def _applyImpl(in: Iterable[Bool])(implicit sourceInfo: SourceInfo): UInt
    Attributes
    protected
  6. macro def apply(in: Bits): UInt
    Definition Classes
    PopCountObjIntf
  7. macro def apply(in: Iterable[Bool]): UInt
    Definition Classes
    PopCountObjIntf
  8. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  9. def atLeast(n: Int, x: Iterable[Bool])(implicit sourceInfo: SourceInfo): Bool

    Implements PopCount(x)>=n with less deep circuitry in case n=0,1,2,x.width-1,x.width

    Implements PopCount(x)>=n with less deep circuitry in case n=0,1,2,x.width-1,x.width

    n

    Int Static value that PopCount(x) is compared against

    x

    Seq/Vec of Bool to PopCount

    returns

    true.B when x has n or more bits set

  10. def atLeast(n: Int, x: UInt)(implicit sourceInfo: SourceInfo): Bool

    Implements PopCount(x)>=n with less deep circuitry in case n=0,1,2,x.width-1,x.width

    Implements PopCount(x)>=n with less deep circuitry in case n=0,1,2,x.width-1,x.width

    n

    Int Static value that PopCount(x) is compared against

    x

    UInt to PopCount

    returns

    true.B when x has n or more bits set

  11. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  12. def do_apply(in: Bits)(implicit sourceInfo: SourceInfo): UInt

    Definition Classes
    PopCountObjIntf
  13. def do_apply(in: Iterable[Bool])(implicit sourceInfo: SourceInfo): UInt

    Definition Classes
    PopCountObjIntf
  14. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. def equalTo(n: Int, x: Iterable[Bool])(implicit sourceInfo: SourceInfo): Bool

    Implements PopCount(x)==n with less deep circuitry in case n=0,1,x.width-1,x.width

    Implements PopCount(x)==n with less deep circuitry in case n=0,1,x.width-1,x.width

    n

    Int Static value that PopCount(x) is compared against

    x

    Seq/Vec of Bool to PopCount

    returns

    true.B when x has exactly n bits set

  16. def equalTo(n: Int, x: UInt)(implicit sourceInfo: SourceInfo): Bool

    Implements PopCount(x)==n with less deep circuitry in case n=0,1,x.width-1,x.width

    Implements PopCount(x)==n with less deep circuitry in case n=0,1,x.width-1,x.width

    n

    Int Static value that PopCount(x) is compared against

    x

    UInt to PopCount

    returns

    true.B when x has exactly n bits set

  17. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  18. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  19. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  20. def greaterThan(n: Int, x: Iterable[Bool])(implicit sourceInfo: SourceInfo): Bool

    Implements PopCount(x)>n with less deep circuitry in case n=0,1,x.width-1

    Implements PopCount(x)>n with less deep circuitry in case n=0,1,x.width-1

    n

    Int Static value that PopCount(x) is compared against

    x

    Seq/Vec of Bool to PopCount

    returns

    true.B when x has more than n bits set

  21. def greaterThan(n: Int, x: UInt)(implicit sourceInfo: SourceInfo): Bool

    Implements PopCount(x)>n with less deep circuitry in case n=0,1,x.width-1

    Implements PopCount(x)>n with less deep circuitry in case n=0,1,x.width-1

    n

    Int Static value that PopCount(x) is compared against

    x

    UInt to PopCount

    returns

    true.B when x has more than n bits set

  22. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  23. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  24. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  25. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  26. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  27. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  28. def toString(): String
    Definition Classes
    AnyRef → Any
  29. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  30. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  31. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from PopCountObjIntf

Inherited from AnyRef

Inherited from Any

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