tree 2a868f1b07b93bdc87fc2e125cf7b5fd1f808db1
parent 924abaa4dfdc4e78047f2bc81fe57dcd7dd1c013
author Michael Schaffner <msf@opentitan.org> 1601406787 -0700
committer Michael Schaffner <msf@google.com> 1601596464 -0700

[prim_xilinx_flop] Add a Xilinx version with keep attribute

This adds a prim_xilinx_flop.sv variant that places a keep attribute on
the flop output in order to prevent Vivado from optimizing the flop
away.

Signed-off-by: Michael Schaffner <msf@opentitan.org>