blif support for IVL_LPM_FF devices.

tgt-blif/Makefile.in

@@ -45,7 +45,7 @@ CXXFLAGS = @WARNING_FLAGS@ @WARNING_FLAGS_CXX@ @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_mux.o lpm_part_vp.o lpm_re_logic.o nex_data.o
+    lpm_ff.o lpm_mux.o lpm_part_vp.o lpm_re_logic.o nex_data.o
 
 all: dep blif.tgt
 

tgt-blif/lpm.cc

@@ -88,6 +88,9 @@ int print_lpm(FILE*fd, ivl_lpm_t net)
 	  case IVL_LPM_CMP_NEE:
 	    rc += print_lpm_cmp_ne(fd, net);
 	    break;
+	  case IVL_LPM_FF:
+	    rc += print_lpm_ff(fd, net);
+	    break;
 	  case IVL_LPM_MUX:
 	    rc += print_lpm_mux(fd, net);
 	    break;

tgt-blif/lpm_ff.cc

@@ -0,0 +1,62 @@
+/*
+ * 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>
+
+using namespace std;
+
+int print_lpm_ff(FILE*fd, ivl_lpm_t net)
+{
+      int errors = 0;
+
+      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);
+
+      ivl_nexus_t nex_c = ivl_lpm_clk(net);
+      blif_nex_data_t*ned_c = blif_nex_data_t::get_nex_data(nex_c);
+
+      if (ivl_lpm_async_clr(net)) {
+	    errors += 1;
+	    fprintf(stderr, "%s:%u: sorry: blif: Asynchronous clear not implemented yet\n",
+		    ivl_lpm_file(net), ivl_lpm_lineno(net));
+      }
+
+      if (ivl_lpm_async_set(net)) {
+	    errors += 1;
+	    fprintf(stderr, "%s:%u: sorry: blif: Asynchronous set not implemented yet\n",
+		    ivl_lpm_file(net), ivl_lpm_lineno(net));
+      }
+
+      fprintf(fd, "# IVL_LPM_FF: width=%u, Q=%s, D=%s, C=%s\n",
+	      ivl_lpm_width(net), ned_q->get_name(), ned_d->get_name(), ned_c->get_name());
+
+      for (unsigned wid = 0 ; wid < ivl_lpm_width(net) ; wid += 1) {
+	    fprintf(fd, ".latch %s%s %s%s re %s%s 3\n",
+		    ned_d->get_name(), ned_d->get_name_index(wid),
+		    ned_q->get_name(), ned_q->get_name_index(wid),
+		    ned_c->get_name(), ned_c->get_name_index(0));
+      }
+
+      return errors;
+}

tgt-blif/priv.h

@@ -32,6 +32,7 @@ extern int print_logic_gate(FILE*fd, ivl_net_logic_t net);
 
 extern int print_lpm(FILE*fd, ivl_lpm_t net);
 extern int print_lpm_add(FILE*fd, ivl_lpm_t net);
+extern int print_lpm_ff(FILE*fd, ivl_lpm_t net);
 extern int print_lpm_sub(FILE*fd, ivl_lpm_t net);
 extern int print_lpm_cmp_eq(FILE*fd, ivl_lpm_t net);
 extern int print_lpm_cmp_gt(FILE*fd, ivl_lpm_t net);