Enhance views to [sometimes] support dynamic indexing and implement FlatIO (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>

1 files changed, 1 insertions, 3 deletions

diff --git a/src/test/scala/chiselTests/experimental/DataViewTargetSpec.scala b/src/test/scala/chiselTests/experimental/DataViewTargetSpec.scala
index da27c9c8..ddeeab6e 100644
--- a/src/test/scala/chiselTests/experimental/DataViewTargetSpec.scala
+++ b/src/test/scala/chiselTests/experimental/DataViewTargetSpec.scala
@@ -125,9 +125,7 @@ class DataViewTargetSpec extends ChiselFlatSpec {
     val pairs = annos.collect { case DummyAnno(t, idx) => (idx, t.toString) }.sortBy(_._1)
     val expected = Seq(
       0 -> "~MyParent|MyChild>out.foo",
-      // The child of the view that was itself an Aggregate got split because 1:1 is lacking here
-      1 -> "~MyParent|MyChild>out.foo[0]",
-      1 -> "~MyParent|MyChild>out.foo[1]",
+      1 -> "~MyParent|MyChild>out.foo",
       2 -> "~MyParent|MyParent/inst:MyChild>out.foo",
       3 -> "~MyParent|MyParent/inst:MyChild>out"
     )