a_fefifo_htc.tdf

sdram读写

--a_fefifo LPM_NUMWORDS=512 lpm_widthad=9 OVERFLOW_CHECKING="ON" UNDERFLOW_CHECKING="ON" USEDW_IN_DELAY=1 aclr clock empty full usedw_in wreq
--VERSION_BEGIN 8.1 cbx_cycloneii 2008:05:19:10:57:37:SJ cbx_fifo_common 2008:05:19:10:54:06:SJ cbx_lpm_add_sub 2008:05:19:10:49:01:SJ cbx_lpm_compare 2008:09:01:07:44:05:SJ cbx_lpm_counter 2008:05:19:10:42:20:SJ cbx_lpm_decode 2008:05:19:10:39:27:SJ cbx_mgl 2008:08:08:15:16:18:SJ cbx_stratix 2008:08:05:17:10:23:SJ cbx_stratixii 2008:08:07:13:54:47:SJ  VERSION_END


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--synthesis_resources = lut 18 
SUBDESIGN a_fefifo_htc
( 
	aclr	:	input;
	clock	:	input;
	empty	:	output;
	full	:	output;
	usedw_in[8..0]	:	input;
	wreq	:	input;
) 
VARIABLE 
	b_full : dffe;
	b_non_empty : dffe;
	b_one : dffe;
	cmp_full_aeb_int	:	WIRE;
	cmp_full_agb_int	:	WIRE;
	cmp_full_ageb	:	WIRE;
	cmp_full_dataa[8..0]	:	WIRE;
	cmp_full_datab[8..0]	:	WIRE;
	equal_zero[8..0]	: WIRE;
	is_zero0	: WIRE;
	is_zero1	: WIRE;
	is_zero2	: WIRE;
	is_zero3	: WIRE;
	is_zero4	: WIRE;
	is_zero5	: WIRE;
	is_zero6	: WIRE;
	is_zero7	: WIRE;
	is_zero8	: WIRE;
	usedw[8..0]	: WIRE;

BEGIN 
	b_full.clk = clock;
	b_full.clrn = (! aclr);
	b_full.d = cmp_full_ageb;
	b_non_empty.clk = clock;
	b_non_empty.clrn = (! aclr);
	b_non_empty.d = (wreq # (b_non_empty.q & ((! b_one.q) # (! is_zero8))));
	b_one.clk = clock;
	b_one.clrn = (! aclr);
	b_one.d = ((b_one.q & (b_one.q $ (wreq # is_zero8))) # (((! b_one.q) & b_non_empty.q) & (! wreq)));
	IF (cmp_full_dataa[] == cmp_full_datab[]) THEN
		cmp_full_aeb_int = VCC;
	ELSE
		cmp_full_aeb_int = GND;
	END IF;
	IF (cmp_full_dataa[] > cmp_full_datab[]) THEN
		cmp_full_agb_int = VCC;
	ELSE
		cmp_full_agb_int = GND;
	END IF;
	cmp_full_ageb = cmp_full_agb_int # cmp_full_aeb_int;
	cmp_full_dataa[] = usedw[];
	cmp_full_datab[] = B"111111101";
	empty = (! b_non_empty.q);
	equal_zero[] = ( B"1", B"1", B"1", B"1", B"1", B"1", B"1", B"1", B"1");
	full = b_full.q;
	is_zero0 = (usedw[0..0] $ equal_zero[0..0]);
	is_zero1 = ((usedw[1..1] $ equal_zero[1..1]) & is_zero0);
	is_zero2 = ((usedw[2..2] $ equal_zero[2..2]) & is_zero1);
	is_zero3 = ((usedw[3..3] $ equal_zero[3..3]) & is_zero2);
	is_zero4 = ((usedw[4..4] $ equal_zero[4..4]) & is_zero3);
	is_zero5 = ((usedw[5..5] $ equal_zero[5..5]) & is_zero4);
	is_zero6 = ((usedw[6..6] $ equal_zero[6..6]) & is_zero5);
	is_zero7 = ((usedw[7..7] $ equal_zero[7..7]) & is_zero6);
	is_zero8 = ((usedw[8..8] $ equal_zero[8..8]) & is_zero7);
	usedw[] = usedw_in[];
END;
--VALID FILE