IEEE 1164 package body STD_ULOGIC, STD_LOGIC

FUNCTION resolved (s:std_ulogic_ vector) RETURN std_ulogic IS

VARIABLE result:std_ulogic := ‘Z’; -- weakest state default

BEGIN

-- the test for a single driver is essential otherwise the

-- loop would return ‘X’ for a single driver of ‘-’ and that

-- would conflict with the value of a single driver unresolved signal.

IF (s’LENGTH = 1) THEN RETURN s(s’LOW);

ELSE

FOR i IN s’RANGE LOOP

result := resolution_table(result, s(I));

END LOOP;

END IF;

RETURN result;

END resolved;

Part 2 of 2: