www.pudn.com > PS2_jianpanshibie_FPGA.rar > add_sub_6rh.tdf, change:2010-12-02,size:2746b


--lpm_add_sub CARRY_CHAIN="MANUAL" CARRY_CHAIN_LENGTH=48 DEVICE_FAMILY="Cyclone" LPM_DIRECTION="ADD" LPM_REPRESENTATION="UNSIGNED" LPM_WIDTH=6 ONE_INPUT_IS_CONSTANT="YES" cin dataa datab result 
--VERSION_BEGIN 9.0 cbx_cycloneii 2008:05:19:10:57:37:SJ cbx_lpm_add_sub 2008:12:09:22:11:50:SJ cbx_mgl 2009:01:29:16:12:07:SJ cbx_stratix 2008:09:18:16:08:35:SJ cbx_stratixii 2008:11:14:16:08:42:SJ  VERSION_END 
 
 
-- Copyright (C) 1991-2009 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 from 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 7  
SUBDESIGN add_sub_6rh 
(  
	cin	:	input; 
	dataa[5..0]	:	input; 
	datab[5..0]	:	input; 
	result[5..0]	:	output; 
)  
VARIABLE  
	add_sub_cella[5..0] : carry_sum; 
	external_cin_cell : carry_sum; 
	datab_node[5..0]	: WIRE; 
	main_cin_wire	: WIRE; 
 
BEGIN  
	add_sub_cella[].cin = ( ((dataa[5..5] & datab_node[5..5]) # ((dataa[5..5] # datab_node[5..5]) & add_sub_cella[4].cout)), ((dataa[4..4] & datab_node[4..4]) # ((dataa[4..4] # datab_node[4..4]) & add_sub_cella[3].cout)), ((dataa[3..3] & datab_node[3..3]) # ((dataa[3..3] # datab_node[3..3]) & add_sub_cella[2].cout)), ((dataa[2..2] & datab_node[2..2]) # ((dataa[2..2] # datab_node[2..2]) & add_sub_cella[1].cout)), ((dataa[1..1] & datab_node[1..1]) # ((dataa[1..1] # datab_node[1..1]) & add_sub_cella[0].cout)), ((dataa[0..0] & datab_node[0..0]) # ((dataa[0..0] # datab_node[0..0]) & main_cin_wire))); 
	add_sub_cella[].sin = ( ((dataa[5..5] $ datab_node[5..5]) $ add_sub_cella[4].cout), ((dataa[4..4] $ datab_node[4..4]) $ add_sub_cella[3].cout), ((dataa[3..3] $ datab_node[3..3]) $ add_sub_cella[2].cout), ((dataa[2..2] $ datab_node[2..2]) $ add_sub_cella[1].cout), ((dataa[1..1] $ datab_node[1..1]) $ add_sub_cella[0].cout), ((dataa[0..0] $ datab_node[0..0]) $ main_cin_wire)); 
	external_cin_cell.cin = cin; 
	external_cin_cell.sin = B"0"; 
	datab_node[] = datab[]; 
	main_cin_wire = external_cin_cell.cout; 
	result[] = add_sub_cella[].sout; 
END; 
--VALID FILE