ENTITY o4_x2 IS GENERIC ( CONSTANT area : NATURAL := 1750; CONSTANT cin_i0 : NATURAL := 10; CONSTANT cin_i1 : NATURAL := 10; CONSTANT cin_i2 : NATURAL := 10; CONSTANT cin_i3 : NATURAL := 9; CONSTANT rdown_i0_q : NATURAL := 1620; CONSTANT rdown_i1_q : NATURAL := 1620; CONSTANT rdown_i2_q : NATURAL := 1620; CONSTANT rdown_i3_q : NATURAL := 1620; CONSTANT rup_i0_q : NATURAL := 1790; CONSTANT rup_i1_q : NATURAL := 1790; CONSTANT rup_i2_q : NATURAL := 1790; CONSTANT rup_i3_q : NATURAL := 1790; CONSTANT tphh_i3_q : NATURAL := 378; CONSTANT tphh_i1_q : NATURAL := 446; CONSTANT tphh_i0_q : NATURAL := 508; CONSTANT tpll_i2_q : NATURAL := 531; CONSTANT tphh_i2_q : NATURAL := 567; CONSTANT tpll_i0_q : NATURAL := 601; CONSTANT tpll_i3_q : NATURAL := 626; CONSTANT tpll_i1_q : NATURAL := 631; CONSTANT transistors : NATURAL := 10 ); PORT ( i0 : in BIT; i1 : in BIT; i2 : in BIT; i3 : in BIT; q : out BIT; vdd : in BIT; vss : in BIT ); END o4_x2; ARCHITECTURE behaviour_data_flow OF o4_x2 IS BEGIN ASSERT ((vdd and not (vss)) = '1') REPORT "power supply is missing on o4_x2" SEVERITY WARNING; q <= (((i0 or i1) or i2) or i3) after 1200 ps; END;