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(backport #2476) (#2479)
* Capture 1:1 mappings of Aggregates inside of views
This is implemented by including any corresponding Aggregates from the
DataView.mapping in the AggregateViewBinding.childMap (which is now of
type Map[Data, Data]).
This enables dynamically indexing Vecs that are themselves elements of
larger Aggregates in views when the corresponding element of the view is
a Vec of the same type. It also increases the number of cases where a
single Target can represent part of a view.
(cherry picked from commit 1f6b1ca14ccf86918065073c3f6f3626dd83a68e)
* Add FlatIO API for creating ports from Bundles without a prefix
(cherry picked from commit 772a3a1fe3b9372b7c2d7cd2d424b2adcd633cdb)
* [docs] Add FlatIO to the general cookbook
(cherry picked from commit b4159641350f238f0f899b69954142ce8ee11544)
Co-authored-by: Jack Koenig <koenig@sifive.com>
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Command:
sbt scalafmtAll
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* DataProducts for Seq and Tuple2-10 in DataProduct companion object
* DataViews for Seq and Tuple 2-10 in DataView companion object
* HWTuple2-10 Bundles in chisel3.experimental
* Implicit conversions from Seq to Vec and Tuple to HWTuple in chisel3.experimental.conversions
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This introduces a new experimental API for module instantiation that disentagles
elaborating the definition (or implementation) from instantiation of
a given module. This solves Chisel's longstanding reliance on
"Deduplication" for generating Verilog with multiple instances of the
same module.
The new API resides in package chisel3.experimental.hierarchy. Please
see the hierarchy ScalaDoc, documentation, and tests for examples of
use.
Co-authored-by: Jack Koenig <koenig@sifive.com>
Co-authored-by: Megan Wachs <megan@sifive.com>
Co-authored-by: Schuyler Eldridge <schuyler.eldridge@sifive.com>
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DataView is a mechanism for "viewing" Scala objects as a subtype of
`Data`. Often, this is useful for viewing one subtype of `Data`, as
another. One can think about a DataView as a cross between a
customizable cast and an untagged union.
A DataView has a Target type `T`, and a View type `V`. DataView requires
that an implementation of `DataProduct` is available for Target types.
DataProduct is a type class that provides a way to iterate on `Data`
children of objects of implementing types.
If a DataView is provided for a type T to a type V, then the function
.viewAs[V] (of type T => V) is available. The object (of type T) returned
by .viewAs is called a "View" and can be used as both an rvalue and an
lvalue. Unlike when using an .asTypeOf cast, connecting to a "View" will
connect to the associated field or fields of the underlying Target.
DataView also enables .viewAsSupertype which is available for viewing
Bundles as a parent Bundle type. It is similar to .viewAs but requires
a prototype object of the Target type which will be cloned in order to
create the returned View. .viewAsSupertype maps between the
corresponding fields of the parent and child Bundle types.
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