59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
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/*
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* Copyright (c) 2016 Yury Gribov (tetra2005@gmail.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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# include "priv.h"
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# include "nex_data.h"
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# include <cassert>
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/*
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* Implement IVL_LPM_SIGN_EXT devices
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*/
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int print_lpm_sign_ext(FILE*fd, ivl_lpm_t net)
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{
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fprintf(fd, "# %s:%u: IVL_LPM_SIGN_EXT: width=%u\n",
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ivl_lpm_file(net), ivl_lpm_lineno(net), ivl_lpm_width(net));
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ivl_nexus_t q_nex = ivl_lpm_q(net);
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ivl_nexus_t d_nex = ivl_lpm_data(net,0);
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blif_nex_data_t*q_ned = blif_nex_data_t::get_nex_data(q_nex);
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blif_nex_data_t*d_ned = blif_nex_data_t::get_nex_data(d_nex);
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unsigned inw = d_ned->get_width();
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unsigned outw = ivl_lpm_width(net);
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//printf("Shift: LPM width = %u, output width = %zd, input width = %u\n", outw, q_ned->get_width(), inw);
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assert(outw == q_ned->get_width());
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assert(inw < outw);
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for (unsigned idx = 0 ; idx < outw ; idx += 1) {
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unsigned idx_in = idx < inw ? idx : inw - 1;
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fprintf(fd, ".names %s%s %s%s\n",
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d_ned->get_name(), d_ned->get_name_index(idx_in),
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q_ned->get_name(), q_ned->get_name_index(idx));
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fprintf(fd, "1 1\n");
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}
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return 0;
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}
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