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marta |
-- File Name : comp2.vbe --
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-- Description : The special comparator resulting --
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-- an integer 2^16+1 or an integer 0 on the 16-bit data --
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-- Purpose : To be used by ASIMUT and SCMAP --
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-- Date : Aug 22, 2001 --
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-- Version : 1.1 --
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-- Author : Martadinata A. --
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-- Address : VLSI RG, Dept. of Electrical Engineering --
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-- ITB, Bandung, Indonesia --
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-- E-mail : marta@vlsi.itb.ac.id --
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entity com2 is
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port(
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p : in bit_vector(15 downto 0);
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q : in bit_vector(15 downto 0);
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kout2 : out bit_vector(15 downto 0);
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vdd : in bit;
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vss : in bit
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);
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end com2;
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architecture vbe of com2 is
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signal less, equal : bit;
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begin
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assert ((vdd and not (vss)) = '1')
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report "power supply is missing on com2"
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severity warning;
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less <= (
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((not p(0)) and q(0)) and (not(p(1) xor q(1))) and (not(p(2) xor q(2))) and
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(not(p(3) xor q(3))) and (not(p(4) xor q(4))) and (not(p(5) xor q(5))) and
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(not(p(6) xor q(6))) and (not(p(7) xor q(7))) and (not(p(8) xor q(8))) and
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(not(p(9) xor q(9))) and (not(p(10) xor q(10))) and (not(p(11) xor q(11)))
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and (not(p(12) xor q(12))) and (not(p(13) xor q(13))) and (not(p(14) xor
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q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(1)) and q(1)) and (not(p(2) xor q(2))) and
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(not(p(3) xor q(3))) and (not(p(4) xor q(4))) and (not(p(5) xor q(5))) and
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(not(p(6) xor q(6))) and (not(p(7) xor q(7))) and (not(p(8) xor q(8))) and
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(not(p(9) xor q(9))) and (not(p(10) xor q(10))) and (not(p(11) xor q(11)))
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and (not(p(12) xor q(12))) and (not(p(13) xor q(13))) and (not(p(14) xor
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q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(2)) and q(2)) and (not(p(3) xor q(3))) and (not(p(4) xor q(4))) and
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(not(p(5) xor q(5))) and (not(p(6) xor q(6))) and (not(p(7) xor q(7))) and
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(not(p(8) xor q(8))) and (not(p(9) xor q(9))) and (not(p(10) xor q(10))) and
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(not(p(11) xor q(11))) and (not(p(12) xor q(12))) and (not(p(13) xor q(13)))
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and (not(p(14) xor q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(3)) and q(3)) and (not(p(4) xor q(4))) and
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(not(p(5) xor q(5))) and (not(p(6) xor q(6))) and (not(p(7) xor q(7))) and
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(not(p(8) xor q(8))) and (not(p(9) xor q(9))) and (not(p(10) xor q(10))) and
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(not(p(11) xor q(11))) and (not(p(12) xor q(12))) and (not(p(13) xor q(13)))
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and (not(p(14) xor q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(4)) and q(4)) and (not(p(5) xor q(5))) and (not(p(6) xor q(6))) and
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(not(p(7) xor q(7))) and (not(p(8) xor q(8))) and (not(p(9) xor q(9))) and
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(not(p(10) xor q(10))) and (not(p(11) xor q(11))) and (not(p(12) xor q(12)))
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and (not(p(13) xor q(13))) and (not(p(14) xor q(14))) and (not(p(15) xor
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q(15)))
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)or(
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((not p(5)) and q(5)) and (not(p(6) xor q(6))) and
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(not(p(7) xor q(7))) and (not(p(8) xor q(8))) and (not(p(9) xor q(9))) and
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(not(p(10) xor q(10))) and (not(p(11) xor q(11))) and (not(p(12) xor q(12)))
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and (not(p(13) xor q(13))) and (not(p(14) xor q(14))) and (not(p(15) xor
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q(15)))
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)or(
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((not p(6)) and q(6)) and (not(p(7) xor q(7))) and (not(p(8) xor q(8))) and
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(not(p(9) xor q(9))) and (not(p(10) xor q(10))) and (not(p(11) xor q(11))) and
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(not(p(12) xor q(12))) and (not(p(13) xor q(13))) and (not(p(14) xor
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q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(7)) and q(7)) and (not(p(8) xor q(8))) and
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(not(p(9) xor q(9))) and (not(p(10) xor q(10))) and (not(p(11) xor q(11))) and
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(not(p(12) xor q(12))) and (not(p(13) xor q(13))) and (not(p(14) xor
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q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(8)) and q(8)) and (not(p(9) xor q(9))) and (not(p(10) xor q(10))) and
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(not(p(11) xor q(11))) and (not(p(12) xor q(12))) and (not(p(13) xor q(13))) and
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(not(p(14) xor q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(9)) and q(9)) and (not(p(10) xor q(10))) and
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(not(p(11) xor q(11))) and (not(p(12) xor q(12))) and (not(p(13) xor q(13))) and
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(not(p(14) xor q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(10)) and q(10)) and (not(p(11) xor q(11))) and (not(p(12) xor q(12))) and
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(not(p(13) xor q(13))) and (not(p(14) xor q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(11)) and q(11)) and (not(p(12) xor q(12))) and
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(not(p(13) xor q(13))) and (not(p(14) xor q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(12)) and q(12)) and (not(p(13) xor q(13))) and (not(p(14) xor q(14))) and
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(not(p(15) xor q(15)))
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)or(
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((not p(13)) and q(13)) and (not(p(14) xor q(14))) and (not(p(15) xor q(15)))
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)or(
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((not p(14)) and q(14)) and (not(p(15) xor q(15)))
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)or
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((not p(15)) and q(15));
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equal <=
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(not(p(0) xor q(0))) and (not(p(1) xor q(1))) and (not(p(2) xor q(2))) and
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(not(p(3) xor q(3))) and (not(p(4) xor q(4))) and (not(p(5) xor q(5))) and
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(not(p(6) xor q(6))) and (not(p(7) xor q(7))) and (not(p(8) xor q(8))) and
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(not(p(9) xor q(9))) and (not(p(10) xor q(10))) and (not(p(11) xor q(11)))
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and (not(p(12) xor q(12))) and (not(p(13) xor q(13))) and (not(p(14) xor
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q(14))) and (not(p(15) xor q(15)));
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kout2 <= "0000000000000001" when ((less = '1') or (equal ='1'))
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else "0000000000000000";
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end;
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