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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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// Filename: snglbrev_tb.cpp
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// Filename: bitreverse_tb.cpp
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//
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//
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// Project: A General Purpose Pipelined FFT Implementation
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// Project: A General Purpose Pipelined FFT Implementation
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//
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//
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// Purpose: A test-bench for the bitreversal stage of the pipelined
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// Purpose: A test-bench for the bitreversal stage of the pipelined
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// FFT. This file may be run autonomously. If so, the last line
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// FFT. This file may be run autonomously. If so, the last line
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// FFT handles one or two inputs per clock respectively.
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// FFT handles one or two inputs per clock respectively.
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//
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//
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// Creator: Dan Gisselquist, Ph.D.
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// Creator: Dan Gisselquist, Ph.D.
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// Gisselquist Technology, LLC
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// Gisselquist Technology, LLC
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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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// Copyright (C) 2015,2018, Gisselquist Technology, LLC
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// Copyright (C) 2015,2018, Gisselquist Technology, LLC
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//
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//
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// This program is free software (firmware): you can redistribute it and/or
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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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// modify it under the terms of the GNU General Public License as published
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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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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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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// for more details.
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//
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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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// 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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// 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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// 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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// <http://www.gnu.org/licenses/> for a copy.
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//
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//
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// License: GPL, v3, as defined and found on www.gnu.org,
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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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// 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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////////////////////////////////////////////////////////////////////////////////
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#include "verilated.h"
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#include "verilated.h"
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#include "verilated_vcd_c.h"
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#include "verilated_vcd_c.h"
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#include "fftsize.h"
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#include "fftsize.h"
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#include "Vbitreverse.h"
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#include "Vbitreverse.h"
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#define VVAR(A) v__DOT_ ## A
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#define VVAR(A) v__DOT_ ## A
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#endif
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#endif
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typedef Vbitreverse TSTCLASS;
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typedef Vbitreverse TSTCLASS;
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#ifdef DBLCLKFFT
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#define iaddr VVAR(_iaddr)
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#else
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#define iaddr VVAR(_wraddr)
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#define iaddr VVAR(_wraddr)
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#endif
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#define in_reset VVAR(_in_reset)
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#define in_reset VVAR(_in_reset)
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VerilatedVcdC *trace = NULL;
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VerilatedVcdC *trace = NULL;
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uint64_t m_tickcount = 0;
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uint64_t m_tickcount = 0;
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void tick(TSTCLASS *brev) {
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void tick(TSTCLASS *brev) {
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m_tickcount++;
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m_tickcount++;
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brev->i_clk = 0;
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brev->i_clk = 0;
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brev->eval();
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brev->eval();
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if (trace) trace->dump((uint64_t)(10ul*m_tickcount-2));
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if (trace) trace->dump((vluint64_t)(10ul*m_tickcount-2));
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brev->i_clk = 1;
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brev->i_clk = 1;
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brev->eval();
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brev->eval();
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if (trace) trace->dump((uint64_t)(10ul*m_tickcount));
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if (trace) trace->dump((vluint64_t)(10ul*m_tickcount));
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brev->i_clk = 0;
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brev->i_clk = 0;
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brev->eval();
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brev->eval();
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if (trace) {
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if (trace) {
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trace->dump((uint64_t)(10ul*m_tickcount+5));
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trace->dump((vluint64_t)(10ul*m_tickcount+5));
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trace->flush();
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trace->flush();
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}
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}
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brev->i_ce = 0;
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brev->i_ce = 0;
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}
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}
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}
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}
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return r;
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return r;
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}
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}
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#ifdef DBLCLKFFT
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#define BREVMASK (FFTMASK>>1)
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#define BREVBITS (FFTBITS-1)
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#else
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#define BREVMASK FFTMASK
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#define BREVBITS FFTBITS
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#endif
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int main(int argc, char **argv, char **envp) {
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int main(int argc, char **argv, char **envp) {
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Verilated::commandArgs(argc, argv);
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Verilated::commandArgs(argc, argv);
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Verilated::traceEverOn(true);
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Verilated::traceEverOn(true);
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TSTCLASS *brev = new TSTCLASS;
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TSTCLASS *brev = new TSTCLASS;
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int syncd = 0;
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int syncd = 0;
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brev->i_in = k;
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brev->i_in = k;
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datastore[(dataidx++)&(DATAMSK)] = brev->i_in;
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datastore[(dataidx++)&(DATAMSK)] = brev->i_in;
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#endif
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#endif
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tick(brev);
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tick(brev);
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#ifdef DBLCLKFFT
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printf("k=%3d: IN = %6lx,%6lx OUT = %6lx,%6lx SYNC = %d\t(%2x) %d\n",
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k, brev->i_in_0, brev->i_in_1,
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brev->o_out_0, brev->o_out_1, brev->o_sync,
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brev->iaddr, brev->in_reset);
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#else
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printf("k=%3d: IN = %6lx, OUT = %6lx, SYNC = %d\t(%2x) %d\n",
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printf("k=%3d: IN = %6lx, OUT = %6lx, SYNC = %d\t(%2x) %d\n",
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k, brev->i_in, brev->o_out, brev->o_sync,
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k, brev->i_in, brev->o_out, brev->o_sync,
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brev->iaddr, brev->in_reset);
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brev->iaddr, brev->in_reset);
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#endif
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if ((k>BREV_OFFSET)&&((BREV_OFFSET==(k&FFTMASK))?1:0) != brev->o_sync) {
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if ((k>BREV_OFFSET)&&((BREV_OFFSET==(k&BREVMASK))?1:0) != brev->o_sync) {
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fprintf(stdout, "FAIL, BAD SYNC (k = %d > %d)\n", k, BREV_OFFSET);
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fprintf(stdout, "FAIL, BAD SYNC (k = %d > %d)\n", k, BREV_OFFSET);
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exit(EXIT_FAILURE);
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exit(EXIT_FAILURE);
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} else if (brev->o_sync) {
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} else if (brev->o_sync) {
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syncd = 1;
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syncd = 1;
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}
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}
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#ifdef DBLCLKFFT
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if ((syncd)&&((brev->o_out_0&BREVMASK) != bitrev(FFTBITS, k+1-BREV_OFFSET))) {
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fprintf(stdout, "FAIL: BITREV.0 of k (%2x) = %2lx, not %2lx\n",
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k, brev->o_out_0, bitrev(FFTBITS, (k+1-BREV_OFFSET)));
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// exit(EXIT_FAILURE);
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}
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#else
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if ((syncd)&&((brev->o_out&FFTMASK) != bitrev(FFTBITS, k-BREV_OFFSET))) {
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if ((syncd)&&((brev->o_out&FFTMASK) != bitrev(FFTBITS, k-BREV_OFFSET))) {
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fprintf(stdout, "FAIL: BITREV.0 of k (%2x) = %2lx, not %2lx\n",
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fprintf(stdout, "FAIL: BITREV.0 of k (%2x) = %2lx, not %2lx\n",
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k, brev->o_out, bitrev(FFTBITS, (k-BREV_OFFSET)));
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k, brev->o_out, bitrev(FFTBITS, (k-BREV_OFFSET)));
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exit(EXIT_FAILURE);
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exit(EXIT_FAILURE);
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}
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}
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#endif
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}
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}
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for(int k=0; k<4*(FFTSIZE); k++) {
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for(int k=0; k<4*(FFTSIZE); k++) {
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brev->i_ce = 1;
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brev->i_ce = 1;
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#ifdef DBLCLKFFT
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#ifdef DBLCLKFFT
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