fb_st_block.vst

来自「i need of vhdl code for 32-bit risc proc」· VST 代码 · 共 44 行

ENTITY fb_st_block IS
PORT (
gij : IN BIT;
pij : IN BIT;
cib : IN BIT;
gj1k : IN BIT;
pj1k : IN BIT;
cio : OUT BIT;
cj1 : OUT BIT;
gik : OUT BIT;
pik : OUT BIT);
END fb_st_block ;

ARCHITECTURE fbblock_st_arch OF fb_st_block IS

COMPONENT andgate
PORT ( a2 : IN BIT;
       b2 : IN BIT;
       c2 : OUT BIT
);
END COMPONENT;

COMPONENT orgate
PORT ( a3 : IN BIT;
       b3 : IN BIT;
       c3 : OUT BIT
);
END COMPONENT;


BEGIN

-- Structural Description of the the block that Computes G and P

and1 : andgate PORT MAP(pij,cib,pici);
or1 : orgate PORT MAP(gij,pici,cj1);

--cj1 <= (gij OR ( pij AND cib ));
--cio <= cib;
--pik <= pij AND pj1k;
--gik <= (gj1k OR (pj1k AND gij ));

END;