Merge pull request #502 from pepijndevos/patch-1

Update generic synth script for dfflegalize changes

.cirrus/Dockerfile.ubuntu16.04

@@ -37,7 +37,7 @@ RUN set -e -x ;\
     cd /usr/local/src ;\
     git clone --recursive https://github.com/YosysHQ/yosys.git ;\
     cd yosys ;\
-    git reset --hard 292f03355a425ede48051c79d5bf619591531080 ;\
+    git reset --hard cd8b2ed4e6f9447c94d801de7db7ae6ce0976d57 ;\
     make -j $(nproc) ;\
     make install ;\
     rm -rf /usr/local/src/yosys

generic/synth/synth_generic.tcl

@@ -14,6 +14,7 @@ yosys memory_map
 yosys opt -full
 yosys techmap -map +/techmap.v
 yosys opt -fast
+yosys dfflegalize -cell \$_DFF_P_ 0
 yosys abc -lut $LUT_K -dress
 yosys clean
 yosys techmap -D LUT_K=$LUT_K -map [file dirname [file normalize $argv0]]/cells_map.v