Packages

c

chisel3

Data

abstract class Data extends HasId with NamedComponent with SourceInfoDoc

This forms the root of the type system for wire data types. The data value must be representable as some number (need not be known at Chisel compile time) of bits, and must have methods to pack / unpack structured data to / from bits.

Source
Data.scala
Linear Supertypes
SourceInfoDoc, NamedComponent, HasId, internal.InstanceId, AnyRef, Any
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Inherited
  1. Data
  2. SourceInfoDoc
  3. NamedComponent
  4. HasId
  5. InstanceId
  6. AnyRef
  7. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new Data()

Abstract Value Members

  1. abstract def cloneType: Data.this.type

    Internal API; Chisel users should look at chisel3.chiselTypeOf(...).

    Internal API; Chisel users should look at chisel3.chiselTypeOf(...).

    cloneType must be defined for any Chisel object extending Data. It is responsible for constructing a basic copy of the object being cloned.

    returns

    a copy of the object.

  2. abstract def do_asUInt(implicit sourceInfo: SourceInfo, compileOptions: CompileOptions): UInt

  3. abstract def litOption(): Option[BigInt]

    If this is a literal that is representable as bits, returns the value as a BigInt.

    If this is a literal that is representable as bits, returns the value as a BigInt. If not a literal, or not representable as bits (for example, is or contains Analog), returns None.

  4. abstract def toPrintable: Printable

    Default pretty printing

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def :=(that: ⇒ Data)(implicit sourceInfo: SourceInfo, connectionCompileOptions: CompileOptions): Unit

    Connect this data to that data mono-directionally and element-wise.

    Connect this data to that data mono-directionally and element-wise.

    This uses the MonoConnect algorithm.

    that

    the data to connect to

  4. final def <>(that: ⇒ Data)(implicit sourceInfo: SourceInfo, connectionCompileOptions: CompileOptions): Unit

    Connect this data to that data bi-directionally and element-wise.

    Connect this data to that data bi-directionally and element-wise.

    This uses the BiConnect algorithm.

    that

    the data to connect to

  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. macro def asTypeOf[T <: Data](that: T): T

    Does a reinterpret cast of the bits in this node into the format that provides.

    Does a reinterpret cast of the bits in this node into the format that provides. Returns a new Wire of that type. Does not modify existing nodes.

    x.asTypeOf(that) performs the inverse operation of x := that.toBits.

    Note

    bit widths are NOT checked, may pad or drop bits from input

    ,

    that should have known widths

  8. final macro def asUInt(): UInt

    Reinterpret cast to UInt.

    Reinterpret cast to UInt.

    Note

    value not guaranteed to be preserved: for example, a SInt of width 3 and value -1 (0b111) would become an UInt with value 7

    ,

    Aggregates are recursively packed with the first element appearing in the least-significant bits of the result.

  9. def autoSeed(name: String): Data.this.type

    Takes the last seed suggested.

    Takes the last seed suggested. Multiple calls to this function will take the last given seed, unless this HasId is a module port (see overridden method in Data.scala).

    If the final computed name conflicts with the final name of another signal, the final name may get uniquified by appending a digit at the end of the name.

    Is a lower priority than suggestName, in that regardless of whether autoSeed was called, suggestName will always take precedence if it was called.

    returns

    this object

    Definition Classes
    Data → HasId
  10. def binding: Option[Binding]
    Attributes
    protected[chisel3]
  11. def bindingToString: String
    Attributes
    protected
  12. def binding_=(target: Binding): Unit
    Attributes
    protected
  13. def circuitName: String
    Attributes
    protected
    Definition Classes
    HasId
  14. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  15. def computeName(defaultPrefix: Option[String], defaultSeed: Option[String]): Option[String]

    Computes the name of this HasId, if one exists

    Computes the name of this HasId, if one exists

    defaultPrefix

    Optionally provide a default prefix for computing the name

    defaultSeed

    Optionally provide default seed for computing the name

    returns

    the name, if it can be computed

    Definition Classes
    HasId
  16. def do_asTypeOf[T <: Data](that: T)(implicit sourceInfo: SourceInfo, compileOptions: CompileOptions): T

  17. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  18. def equals(that: Any): Boolean
    Definition Classes
    HasId → AnyRef → Any
  19. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  20. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  21. final def getWidth: Int

    Returns the width, in bits, if currently known.

  22. def hasSeed: Boolean

    returns

    Whether either autoName or suggestName has been called

    Definition Classes
    HasId
  23. def hashCode(): Int
    Definition Classes
    HasId → AnyRef → Any
  24. def instanceName: String
    Definition Classes
    HasId → InstanceId
  25. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  26. def isLit(): Boolean
  27. final def isWidthKnown: Boolean

    Returns whether the width is currently known.

  28. def litValue(): BigInt

    Returns the literal value if this is a literal that is representable as bits, otherwise crashes.

  29. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  30. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  31. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  32. def parentModName: String
    Definition Classes
    HasId → InstanceId
  33. def parentPathName: String
    Definition Classes
    HasId → InstanceId
  34. def pathName: String
    Definition Classes
    HasId → InstanceId
  35. def suggestName(seed: ⇒ String): Data.this.type

    Takes the first seed suggested.

    Takes the first seed suggested. Multiple calls to this function will be ignored. If the final computed name conflicts with another name, it may get uniquified by appending a digit at the end.

    Is a higher priority than autoSeed, in that regardless of whether autoSeed was called, suggestName will always take precedence.

    seed

    The seed for the name of this component

    returns

    this object

    Definition Classes
    HasId
  36. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  37. final def toAbsoluteTarget: ReferenceTarget

    Returns a FIRRTL IsMember that refers to the absolute path to this object in the elaborated hardware graph

    Returns a FIRRTL IsMember that refers to the absolute path to this object in the elaborated hardware graph

    Definition Classes
    NamedComponent → InstanceId
  38. final def toNamed: ComponentName

    Returns a FIRRTL ComponentName that references this object

    Returns a FIRRTL ComponentName that references this object

    Definition Classes
    NamedComponent → InstanceId
    Note

    Should not be called until circuit elaboration is complete

  39. def toString(): String
    Definition Classes
    AnyRef → Any
  40. final def toTarget: ReferenceTarget

    Returns a FIRRTL ReferenceTarget that references this object

    Returns a FIRRTL ReferenceTarget that references this object

    Definition Classes
    NamedComponent → InstanceId
    Note

    Should not be called until circuit elaboration is complete

  41. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  42. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  43. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  44. final def widthOption: Option[Int]

    Returns Some(width) if the width is known, else None.

Deprecated Value Members

  1. def litArg(): Option[LitArg]
    Annotations
    @chiselRuntimeDeprecated() @deprecated
    Deprecated

    (Since version 3.2) litArg is deprecated, use litOption or litTo*Option

Inherited from SourceInfoDoc

Inherited from NamedComponent

Inherited from HasId

Inherited from internal.InstanceId

Inherited from AnyRef

Inherited from Any

Connect

Utilities for connecting hardware components

Ungrouped

SourceInfoTransformMacro

These internal methods are not part of the public-facing API!

The equivalent public-facing methods do not have the do_ prefix or have the same name. Use and look at the documentation for those. If you want left shift, use <<, not do_<<. If you want conversion to a Seq of Bools look at the asBools above, not the one below. Users can safely ignore every method in this group!

🐉🐉🐉 Here be dragons... 🐉🐉🐉

These do_X methods are used to enable both implicit passing of SourceInfo and chisel3.CompileOptions while also supporting chained apply methods. In effect all "normal" methods that you, as a user, will use in your designs, are converted to their "hidden", do_*, via macro transformations. Without using macros here, only one of the above wanted behaviors is allowed (implicit passing and chained applies)---the compiler interprets a chained apply as an explicit 'implicit' argument and will throw type errors.

The "normal", public-facing methods then take no SourceInfo. However, a macro transforms this public-facing method into a call to an internal, hidden do_* that takes an explicit SourceInfo by inserting an implicitly[SourceInfo] as the explicit argument.