add_sub_158.tdf
资源名称:DS18B20.rar [点击查看]
上传用户:whms_168
上传日期:2022-08-09
资源大小:592k
文件大小:2k
源码类别:
VHDL/FPGA/Verilog
开发平台:
Others
- --lpm_add_sub DEVICE_FAMILY="MAX II" LPM_DIRECTION="SUB" LPM_WIDTH=4 cin dataa datab result
- --VERSION_BEGIN 5.1 cbx_cycloneii 2005:08:30:10:31:44:SJ cbx_lpm_add_sub 2005:09:30:12:13:06:SJ cbx_mgl 2005:10:09:07:39:04:SJ cbx_stratix 2005:10:07:15:53:08:SJ cbx_stratixii 2005:07:27:05:50:56:SJ VERSION_END
- -- Copyright (C) 1991-2005 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_158
- (
- cin : input;
- dataa[3..0] : input;
- datab[3..0] : input;
- result[3..0] : output;
- )
- VARIABLE
- add_sub_cella[3..0] : carry_sum;
- external_cin_cell : carry_sum;
- datab_node[3..0] : WIRE;
- main_cin_wire : WIRE;
- BEGIN
- add_sub_cella[].cin = ( ((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[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