New enhanced API for specifying Chisel to Firrtl Annotations (#2628) (#2631)

(cherry picked from commit 4b10cf7a276e90b280c1fd57070566acac3d80d3)

Co-authored-by: Girish Pai <girish.pai@sifive.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/core/src/main/scala/chisel3/Annotation.scala b/core/src/main/scala/chisel3/Annotation.scala
index e08557eb..c350fb30 100644
--- a/core/src/main/scala/chisel3/Annotation.scala
+++ b/core/src/main/scala/chisel3/Annotation.scala
@@ -20,6 +20,14 @@ trait ChiselAnnotation {
   def toFirrtl: Annotation
 }
 
+/** Enhanced interface for Annotations in Chisel
+  *
+  *  Defines a conversion to corresponding FIRRTL Annotation(s)
+  */
+trait ChiselMultiAnnotation {
+  def toFirrtl: Seq[Annotation]
+}
+
 /** Mixin for [[ChiselAnnotation]] that instantiates an associated FIRRTL Transform when this Annotation is present
   * during a run of
   * [[Driver$.execute(args:Array[String],dut:()=>chisel3\.RawModule)* Driver.execute]].
@@ -34,6 +42,9 @@ object annotate {
   def apply(anno: ChiselAnnotation): Unit = {
     Builder.annotations += anno
   }
+  def apply(annos: ChiselMultiAnnotation): Unit = {
+    Builder.newAnnotations += annos
+  }
 }
 
 /** Marks that a module to be ignored in Dedup Transform in Firrtl pass