fuzzer 042: Add bitfilter and restore execution

Signed-off-by: Tomasz Michalak <tmichalak@antmicro.com>

fuzzers/042-clk-bufg-config/Makefile

@@ -1,4 +1,4 @@
-N ?= 40
+N ?= 50
 
 include ../fuzzer.mk
 

fuzzers/042-clk-bufg-config/generate.py

@@ -5,6 +5,13 @@ import json
 from prjxray.segmaker import Segmaker
 
 
+#Decouple interconnect bits from PRESELECT property bits
+def bitfilter(frame, bit):
+    if frame == 7 or frame == 21:
+        return False
+    return True
+
+
 def main():
     segmk = Segmaker("design.bits")
 
@@ -44,7 +51,7 @@ def main():
             segmk.add_site_tag(
                 row['site'], '{}.{}'.format(base_name, tag), 1 ^ row[param])
 
-    segmk.compile()
+    segmk.compile(bitfilter=bitfilter)
     segmk.write()
 
 

fuzzers/Makefile

@@ -78,8 +78,7 @@ $(eval $(call fuzzer,035-iob-ilogic,005-tilegrid))
 $(eval $(call fuzzer,036-iob-ologic,005-tilegrid))
 $(eval $(call fuzzer,040-clk-hrow-config,005-tilegrid))
 $(eval $(call fuzzer,041-clk-hrow-pips,005-tilegrid))
-# 042 fuzzer is unstable, issue #657
-#$(eval $(call fuzzer,042-clk-bufg-config,005-tilegrid))
+$(eval $(call fuzzer,042-clk-bufg-config,005-tilegrid))
 $(eval $(call fuzzer,043-clk-rebuf-pips,005-tilegrid))
 $(eval $(call fuzzer,048-int-piplist,005-tilegrid))
 $(eval $(call fuzzer,049-int-imux-gfan,048-int-piplist))