Field_ops_lib.Reg_with_enableShadow Signal.reg and Signal.pipeline because we want ~enable to be a non-optional argument.
val reg :
Hardcaml.Reg_spec.t ->
enable:Hardcaml.Signal.t ->
Hardcaml.Signal.t ->
Hardcaml.Signal.tval pipeline :
Hardcaml.Reg_spec.t ->
enable:Hardcaml.Signal.t ->
n:int ->
Hardcaml.Signal.t ->
Hardcaml.Signal.t