www.pudn.com > CPLD_PWM.rar > add_sub_uch.tdf

--lpm_add_sub CARRY_CHAIN="MANUAL" CARRY_CHAIN_LENGTH=48 DEVICE_FAMILY="MAX7000S" LPM_DIRECTION="ADD" LPM_REPRESENTATION="UNSIGNED" LPM_WIDTH=5 ONE_INPUT_IS_CONSTANT="YES" dataa datab result 
--VERSION_BEGIN 5.0 cbx_cycloneii 2004:12:20:14:28:52:SJ cbx_lpm_add_sub 2005:04:12:13:30:42:SJ cbx_mgl 2005:04:13:17:26:48:SJ cbx_stratix 2005:03:14:17:09:02:SJ cbx_stratixii 2004:12:22:13:27:12:SJ  VERSION_END 
 
 
--  Copyright (C) 1988-2005 Altera Corporation 
--  Your use of Altera Corporation's design tools, logic functions  
--  and other software and tools, and its AMPP partner logic  
--  functions, and any output files any of the foregoing  
--  (including device programming or simulation files), and any  
--  associated documentation or information are expressly subject  
--  to the terms and conditions of the Altera Program License  
--  Subscription Agreement, Altera MegaCore Function License  
--  Agreement, or other applicable license agreement, including,  
--  without limitation, that your use is for the sole purpose of  
--  programming logic devices manufactured by Altera and sold by  
--  Altera or its authorized distributors.  Please refer to the  
--  applicable agreement for further details. 
 
 
FUNCTION carry_sum (cin, sin) 
RETURNS ( cout, sout); 
 
--synthesis_resources = lut 5  
SUBDESIGN add_sub_uch 
(  
	dataa[4..0]	:	input; 
	datab[4..0]	:	input; 
	result[4..0]	:	output; 
)  
VARIABLE  
	add_sub_cella[4..0] : carry_sum; 
	datab_node[4..0]	: WIRE; 
	main_cin_wire	: WIRE; 
 
BEGIN  
	add_sub_cella[0].cin = ((dataa[0..0] & datab_node[0..0]) # ((dataa[0..0] # datab_node[0..0]) & main_cin_wire)); 
	add_sub_cella[1].cin = ((dataa[1..1] & datab_node[1..1]) # ((dataa[1..1] # datab_node[1..1]) & add_sub_cella[0].cout)); 
	add_sub_cella[2].cin = ((dataa[2..2] & datab_node[2..2]) # ((dataa[2..2] # datab_node[2..2]) & add_sub_cella[1].cout)); 
	add_sub_cella[3].cin = ((dataa[3..3] & datab_node[3..3]) # ((dataa[3..3] # datab_node[3..3]) & add_sub_cella[2].cout)); 
	add_sub_cella[4].cin = ((dataa[4..4] & datab_node[4..4]) # ((dataa[4..4] # datab_node[4..4]) & add_sub_cella[3].cout)); 
	add_sub_cella[0].sin = ((dataa[0..0] $ datab_node[0..0]) $ main_cin_wire); 
	add_sub_cella[1].sin = ((dataa[1..1] $ datab_node[1..1]) $ add_sub_cella[0].cout); 
	add_sub_cella[2].sin = ((dataa[2..2] $ datab_node[2..2]) $ add_sub_cella[1].cout); 
	add_sub_cella[3].sin = ((dataa[3..3] $ datab_node[3..3]) $ add_sub_cella[2].cout); 
	add_sub_cella[4].sin = ((dataa[4..4] $ datab_node[4..4]) $ add_sub_cella[3].cout); 
	datab_node[] = datab[]; 
	main_cin_wire = B"0"; 
	result[] = add_sub_cella[].sout; 
END; 
--VALID FILE