Minor vivado script changes

scripts/vivado/Makefile

@@ -5,8 +5,11 @@ help:
 	@echo "Usage: make {synth_speed|synth_area|synth_soc}"
 
 synth_%:
+	rm -f $@.log
 	$(VIVADO) -nojournal -log $@.log -mode batch -source $@.tcl
 	rm -rf .Xil fsm_encoding.os synth_*.backup.log usage_statistics_webtalk.*
+	-grep -B4 -A10 'Slice LUTs' $@.log
+	-grep -B1 -A9 ^Slack $@.log && echo
 
 tab_%/results.txt:
 	bash tabtest.sh $@

scripts/vivado/synth_speed.tcl

@@ -5,6 +5,7 @@ read_xdc synth_speed.xdc
 synth_design -part xc7k70t-fbg676 -top picorv32_axi
 opt_design
 place_design
+phys_opt_design
 route_design
 
 report_utilization