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/////////////////////////////////////////////////////////////////////////////
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//
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// Filename: fftgen.v
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//
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// Project: A Doubletime Pipelined FFT
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//
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// Purpose: This is the core generator for the project. Every part
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// and piece of this project begins and ends in this program.
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// Once built, this program will build an FFT (or IFFT) core
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// of arbitrary width, precision, etc., that will run at
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// two samples per clock. (Incidentally, I didn't pick two
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// samples per clock because it was easier, but rather because
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// there weren't any two-sample per clock FFT's posted on
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// opencores.com. Further, FFT's running at one sample per
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// clock aren't that hard to find.)
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//
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// You can find the documentation for this program in two places.
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// One is in the usage() function below. The second is in the
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// 'doc'uments directory that comes with this package,
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// specifically in the spec.pdf file. If it's not there, type
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// make in the documents directory to build it.
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//
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// Creator: Dan Gisselquist, Ph.D.
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// Gisselquist Tecnology, LLC
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//
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///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2015, Gisselquist Technology, LLC
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//
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// This program is free software (firmware): you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or (at
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// your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program. (It's in the $(ROOT)/doc directory, run make with no
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// target there if the PDF file isn't present.) If not, see
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// <http://www.gnu.org/licenses/> for a copy.
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//
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// License: GPL, v3, as defined and found on www.gnu.org,
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// http://www.gnu.org/licenses/gpl.html
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//
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//
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///////////////////////////////////////////////////////////////////////////
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//
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//
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#include <stdio.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <string.h>
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"\treg\tsigned\t[(CWIDTH+IWIDTH+3-1):0] b_left_r, b_left_i,\n"
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"\treg\tsigned\t[(CWIDTH+IWIDTH+3-1):0] b_left_r, b_left_i,\n"
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"\t\t\t\t\t\tb_right_r, b_right_i;\n"
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"\t\t\t\t\t\tb_right_r, b_right_i;\n"
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"\treg\tsigned\t[(CWIDTH+IWIDTH+3-1):0] mpy_r, mpy_i;\n"
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"\treg\tsigned\t[(CWIDTH+IWIDTH+3-1):0] mpy_r, mpy_i;\n"
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"\treg\tsigned\t[(CWIDTH+IWIDTH+3-1):0] rnd;\n"
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"\treg\tsigned\t[(CWIDTH+IWIDTH+3-1):0] rnd;\n"
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"\tgenerate\n"
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"\tgenerate\n"
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"\tif ((ROUND==0)||(CWIDTH+IWIDTH-OWIDTH-SHIFT<1))\n"
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"\tif ((ROUND==0)||(CWIDTH+IWIDTH-OWIDTH-SHIFT<2))\n"
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"\t\tassign rnd = ({(CWIDTH+IWIDTH+3){1'b0}});\n"
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"\t\tassign rnd = ({(CWIDTH+IWIDTH+3){1'b0}});\n"
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"\telse if ((IWIDTH+CWIDTH)-(OWIDTH+SHIFT) == 2)\n"
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"\t\tassign rnd = ({ {(OWIDTH+4+SHIFT){1'b0}},1'b1 });\n"
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"\telse\n"
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"\telse\n"
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"\t\tassign rnd = ({ {(OWIDTH+4+SHIFT){1'b0}},1'b1,\n"
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"\t\tassign rnd = ({ {(OWIDTH+4+SHIFT){1'b0}},1'b1,\n"
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"\t\t\t\t{((IWIDTH+CWIDTH+3)-(OWIDTH+SHIFT+5)){1'b0}} });\n"
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"\t\t\t\t{((IWIDTH+CWIDTH+3)-(OWIDTH+SHIFT+5)){1'b0}} });\n"
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"\tendgenerate\n"
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"\tendgenerate\n"
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"\n");
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"\n");
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}
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}
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}
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}
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}
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}
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