Demo crude retiming

Signed-off-by: Martin Povišer <[email protected]>

Author: povik

flow/designs/asap7/mac/config.mk

@@ -2,5 +2,6 @@ export DESIGN_NAME = mac
 export VERILOG_FILES = designs/src/mac/mac.v
 export SDC_FILE = designs/asap7/mac/constraints.sdc
 export PLATFORM = asap7
-export PLACE_DENSITY= 0.30
-export CORE_UTILIZATION = 0.50
+export PLACE_DENSITY= 0.80
+export CORE_UTILIZATION = 0.80
+export SYNTH_RETIME_MODULES = mac

flow/scripts/abc_retime.script

@@ -0,0 +1,3 @@
+st
+retime -v -o
+map

flow/scripts/synth.tcl

@@ -56,6 +56,16 @@ json -o $::env(RESULTS_DIR)/mem.json
 exec -- $::env(PYTHON_EXE) $::env(SCRIPTS_DIR)/mem_dump.py \
   --max-bits $::env(SYNTH_MEMORY_MAX_BITS) $::env(RESULTS_DIR)/mem.json
 
+if { [env_var_exists_and_non_empty SYNTH_RETIME_MODULES] } {
+  select $::env(SYNTH_RETIME_MODULES)
+  opt -fast -full
+  memory_map
+  opt -full
+  techmap
+  abc -dff -script scripts/abc_retime.script
+  select -clear
+}
+
 if {
   [env_var_exists_and_non_empty SYNTH_WRAPPED_OPERATORS] ||
   [env_var_exists_and_non_empty SWAP_ARITH_OPERATORS]