Class/Object

firrtl.transforms

CheckCombLoops

Related Docs: object CheckCombLoops | package transforms

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class CheckCombLoops extends Transform with RegisteredTransform

Finds and detects combinational logic loops in a circuit, if any exist. Returns the input circuit with no modifications.

Source
CheckCombLoops.scala
Exceptions thrown

firrtl.transforms.CheckCombLoops.CombLoopException if a loop is found

Note

The pass will throw exceptions on "false paths"

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The pass relies on ExtModulePathAnnotations to find loops through ExtModules

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The pass looks for loops through combinational-read memories

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Output form: Low FIRRTL (identity transform)

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Input form: Low FIRRTL

Linear Supertypes
Type Hierarchy
Ordering
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  2. By Inheritance
Inherited
  1. CheckCombLoops
  2. RegisteredTransform
  3. HasShellOptions
  4. Transform
  5. TransformLike
  6. LazyLogging
  7. AnyRef
  8. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new CheckCombLoops()

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    Exceptions thrown

    firrtl.transforms.CheckCombLoops.CombLoopException if a loop is found

Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  4. final def addOptions(p: OptionParser[AnnotationSeq]): Unit

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    Add all shell (command line) options to an option parser

    Add all shell (command line) options to an option parser

    p

    an option parser

    Definition Classes
    HasShellOptions
  5. def analyze(state: CircuitState): Map[String, DiGraph[String]]

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    Returns a Map from Module name to port connectivity

  6. def analyzeFull(state: CircuitState): Map[String, DiGraph[LogicNode]]

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    Returns a Map from Module name to complete netlist connectivity

  7. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  8. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  9. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  10. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  11. def execute(state: CircuitState): CircuitState

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    Perform the transform, encode renaming with RenameMap, and can delete annotations Called by runTransform.

    Perform the transform, encode renaming with RenameMap, and can delete annotations Called by runTransform.

    state

    Input Firrtl AST

    returns

    A transformed Firrtl AST

    Definition Classes
    CheckCombLoopsTransform
  12. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  13. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
  14. def hashCode(): Int

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    Definition Classes
    AnyRef → Any
  15. def inputForm: LowForm.type

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    The firrtl.CircuitForm that this transform requires to operate on

    The firrtl.CircuitForm that this transform requires to operate on

    Definition Classes
    CheckCombLoopsTransform
  16. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  17. val logger: Logger

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    Definition Classes
    LazyLogging
  18. def name: String

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    A convenience function useful for debugging and error messages

    A convenience function useful for debugging and error messages

    Definition Classes
    TransformTransformLike
  19. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  20. final def notify(): Unit

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    Definition Classes
    AnyRef
  21. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  22. val options: Seq[ShellOption[Unit]]

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    A sequence of options provided

    A sequence of options provided

    Definition Classes
    CheckCombLoopsHasShellOptions
  23. def outputForm: LowForm.type

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    The firrtl.CircuitForm that this transform outputs

    The firrtl.CircuitForm that this transform outputs

    Definition Classes
    CheckCombLoopsTransform
  24. final def runTransform(state: CircuitState): CircuitState

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    Perform the transform and update annotations.

    Perform the transform and update annotations.

    state

    Input Firrtl AST

    returns

    A transformed Firrtl AST

    Definition Classes
    Transform
  25. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef
  26. def toString(): String

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    Definition Classes
    AnyRef → Any
  27. def transform(state: CircuitState): CircuitState

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    A mathematical transform on some type

    A mathematical transform on some type

    returns

    an output object of the same type

    Definition Classes
    TransformTransformLike
  28. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  29. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  30. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Deprecated Value Members

  1. final def getMyAnnotations(state: CircuitState): Seq[Annotation]

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    Convenience method to get annotations relevant to this Transform

    Convenience method to get annotations relevant to this Transform

    state

    The CircuitState form which to extract annotations

    returns

    A collection of annotations

    Definition Classes
    Transform
    Annotations
    @deprecated
    Deprecated

    (Since version 1.1) Just collect the actual Annotation types the transform wants

Inherited from RegisteredTransform

Inherited from HasShellOptions

Inherited from Transform

Inherited from TransformLike[CircuitState]

Inherited from LazyLogging

Inherited from AnyRef

Inherited from Any

Ungrouped