Metavalue cleanup for rotator.vhdl

Signed-off-by: Michael Neuling <mikey@neuling.org>

diff --git a/rotator.vhdl b/rotator.vhdl
index 45913c94df5ab7968b2c5d6b92aeaa8d9e62365f..1049e20c4645464c16d222d15c74e7bd9f260849 100644 (file)
--- a/rotator.vhdl
+++ b/rotator.vhdl
@@ -34,6 +34,10 @@ architecture behaviour of rotator is
         variable ret: std_ulogic_vector(63 downto 0);
     begin
         ret := (others => '0');
+       if is_X(mask_begin) then
+           ret := (others => 'X');
+           return ret;
+       end if;
         for i in 0 to 63 loop
             if i >= to_integer(unsigned(mask_begin)) then
                 ret(63 - i) := '1';