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Add blif LIB_RE_* gates support.

This commit is contained in:
Stephen Williams 2013-07-31 19:59:26 -07:00
parent 534d44ba55
commit 999a53ab75
4 changed files with 135 additions and 1 deletions
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2
tgt-blif/Makefile.in
View File

@ -45,7 +45,7 @@ CXXFLAGS = @WARNING_FLAGS@ @CXXFLAGS@
LDFLAGS = @LDFLAGS@
O = blif.o constants.o logic_gate.o lpm.o lpm_add.o lpm_cmp_eq.o lpm_cmp_gt.o \
lpm_part_vp.o nex_data.o
lpm_part_vp.o lpm_re_logic.o nex_data.o
all: dep blif.tgt

8
tgt-blif/lpm.cc
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@ -91,6 +91,14 @@ int print_lpm(FILE*fd, ivl_lpm_t net)
case IVL_LPM_PART_VP:
rc += print_lpm_part_vp(fd, net);
break;
case IVL_LPM_RE_AND:
case IVL_LPM_RE_OR:
case IVL_LPM_RE_XOR:
case IVL_LPM_RE_NAND:
case IVL_LPM_RE_NOR:
case IVL_LPM_RE_XNOR:
rc += print_lpm_re_logic(fd, net);
break;
case IVL_LPM_SUB:
rc += print_lpm_sub(fd, net);
break;

125
tgt-blif/lpm_re_logic.cc Normal file
View File

@ -0,0 +1,125 @@
/*
* Copyright (c) 2013 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include "priv.h"
# include "nex_data.h"
# include <cassert>
static bool re_xor(unsigned val)
{
bool flag = false;
for (size_t idx = 0 ; idx < 8*sizeof(val) ; idx += 1) {
if (val&1) flag ^= true;
val >>= 1;
}
return flag;
}
int print_lpm_re_logic(FILE*fd, ivl_lpm_t net)
{
ivl_nexus_t nex_q = ivl_lpm_q(net);
blif_nex_data_t*ned_q = blif_nex_data_t::get_nex_data(nex_q);
ivl_nexus_t nex_d = ivl_lpm_data(net,0);
blif_nex_data_t*ned_d = blif_nex_data_t::get_nex_data(nex_d);
assert(ned_q->get_width() == 1);
fprintf(fd, ".names");
for (size_t idx = 0 ; idx < ned_d->get_width() ; idx += 1) {
fprintf(fd, " %s%s", ned_d->get_name(), ned_d->get_name_index(idx));
}
fprintf(fd, " %s%s\n", ned_q->get_name(), ned_q->get_name_index(0));
switch (ivl_lpm_type(net)) {
case IVL_LPM_RE_AND:
for (size_t idx = 0 ; idx < ned_d->get_width() ; idx += 1)
fputc('1', fd);
fprintf(fd, " 1\n");
break;
case IVL_LPM_RE_OR:
for (size_t idx = 0 ; idx < ned_d->get_width() ; idx += 1) {
for (size_t wid = 0 ; wid < ned_d->get_width() ; wid += 1) {
if (wid==idx)
fputc('1', fd);
else
fputc('-', fd);
}
fprintf(fd, " 1\n");
}
break;
case IVL_LPM_RE_XOR:
assert(ned_d->get_width() < 8*sizeof(unsigned));
for (unsigned val = 0; val < (1U<<ned_d->get_width()); val += 1) {
if (! re_xor(val))
continue;
for (size_t idx = 0 ; idx < ned_d->get_width() ; idx += 1) {
if (val & (1<<idx))
fputc('1', fd);
else
fputc('0', fd);
}
fprintf(fd, " 1\n");
}
break;
case IVL_LPM_RE_NAND:
for (size_t idx = 0 ; idx < ned_d->get_width() ; idx += 1) {
for (size_t wid = 0 ; wid < ned_d->get_width() ; wid += 1) {
if (wid==idx)
fputc('0', fd);
else
fputc('-', fd);
}
fprintf(fd, " 1\n");
}
break;
case IVL_LPM_RE_NOR:
for (size_t idx = 0 ; idx < ned_d->get_width() ; idx += 1)
fputc('0', fd);
fprintf(fd, " 1\n");
break;
case IVL_LPM_RE_XNOR:
assert(ned_d->get_width() < 8*sizeof(unsigned));
for (unsigned val = 0; val < (1U<<ned_d->get_width()); val += 1) {
if (re_xor(val))
continue;
for (size_t idx = 0 ; idx < ned_d->get_width() ; idx += 1) {
if (val & (1<<idx))
fputc('1', fd);
else
fputc('0', fd);
}
fprintf(fd, " 1\n");
}
break;
default:
assert(0);
}
return 0;
}

1
tgt-blif/priv.h
View File

@ -37,6 +37,7 @@ extern int print_lpm_cmp_eq(FILE*fd, ivl_lpm_t net);
extern int print_lpm_cmp_gt(FILE*fd, ivl_lpm_t net);
extern int print_lpm_cmp_ne(FILE*fd, ivl_lpm_t net);
extern int print_lpm_part_vp(FILE*fd, ivl_lpm_t net);
extern int print_lpm_re_logic(FILE*fd, ivl_lpm_t net);
/*
* Emit all the constants for a model. This works by scanning the