object
StructuralHash
Value Members
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final
def
!=(arg0: Any): Boolean
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final
def
##(): Int
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final
def
==(arg0: Any): Boolean
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final
def
asInstanceOf[T0]: T0
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def
clone(): AnyRef
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def
finalize(): Unit
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final
def
getClass(): Class[_]
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def
hashCode(): Int
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final
def
isInstanceOf[T0]: Boolean
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final
def
notify(): Unit
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final
def
notifyAll(): Unit
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def
sha256(node: DefModule, moduleRename: (String) ⇒ String = identity): HashCode
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def
sha256WithSignificantPortNames(module: DefModule, moduleRename: (String) ⇒ String = identity): HashCode
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final
def
synchronized[T0](arg0: ⇒ T0): T0
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def
toString(): String
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final
def
wait(): Unit
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final
def
wait(arg0: Long, arg1: Int): Unit
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final
def
wait(arg0: Long): Unit
This object can performs a "structural" hash over any firrtl Module. It ignores: - [firrtl.ir.Expression Expression] types - Any [firrtl.ir.Info Info] fields - Description on DescribedStmt - each identifier name is replaced by a unique integer which only depends on the order of declaration and is thus deterministic - Module names are ignored.
Because of the way we "agnostify" bundle types, all SubField access nodes need to have a known bundle type. Thus - in a lot of cases, like after reading firrtl from a file - you need to run the firrtl type inference before hashing.
Please note that module hashes don't include any submodules. Two structurally equivalent modules are only functionally equivalent if they are part of the same circuit and thus all modules referred to in DefInstance are the same.