Some embodiments provide a reconfigurable integrated circuit ("IC"). This
IC has several reconfigurable circuits, each having several
configurations for several configuration cycles. The reconfigurable
circuits include several time-extending reconfigurable circuits. During
the operation of the IC, each particular time-extending reconfigurable
circuit maintains at least one of its configurations over at least two
contiguous cycles, in order to allow a signal to propagate through a
signal path, which contains the particular time-extending circuit, within
a desired amount of time.