use work.common.all;
package crhelpers is
- function fxm_to_num(fxm: std_ulogic_vector(7 downto 0)) return integer;
- function num_to_fxm(num: integer) return std_ulogic_vector;
+ subtype crnum_t is integer range 0 to 7;
+ subtype crmask_t is std_ulogic_vector(7 downto 0);
+
+ function fxm_to_num(fxm: crmask_t) return crnum_t;
+ function num_to_fxm(num: crnum_t) return crmask_t;
end package crhelpers;
package body crhelpers is
- function fxm_to_num(fxm: std_ulogic_vector(7 downto 0)) return integer is
+ function fxm_to_num(fxm: crmask_t) return crnum_t is
begin
-- If multiple fields are set (undefined), match existing
-- hardware by returning the first one.
return 7;
end;
- function num_to_fxm(num: integer) return std_ulogic_vector is
+ function num_to_fxm(num: crnum_t) return crmask_t is
begin
case num is
when 0 =>