Create ABC_RETIME_FOR_TWO_PHASE variable in config.mk files for aes, gcd, and riscv32i

Author: leeway64

flow/designs/sky130hd/aes/config.mk

@@ -5,6 +5,8 @@ export PLATFORM    = sky130hd
 export VERILOG_FILES = $(sort $(wildcard $(DESIGN_HOME)/src/$(DESIGN_NICKNAME)/*.v))
 export SDC_FILE      = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/two_phase_clk_constraint.sdc
 
+export ABC_RETIME_FOR_TWO_PHASE = 1
+
 export PLACE_PINS_ARGS = -min_distance 4 -min_distance_in_tracks
 
 export CORE_UTILIZATION = 20

flow/designs/sky130hd/gcd/config.mk

@@ -4,6 +4,8 @@ export PLATFORM    = sky130hd
 export VERILOG_FILES = $(DESIGN_HOME)/src/$(DESIGN_NICKNAME)/gcd.v
 export SDC_FILE      = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/two_phase_clk_constraint.sdc
 
+export ABC_RETIME_FOR_TWO_PHASE = 1
+
 # Adders degrade GCD
 export ADDER_MAP_FILE :=
 

flow/designs/sky130hd/riscv32i/config.mk

@@ -5,6 +5,8 @@ export PLATFORM    = sky130hd
 export VERILOG_FILES = $(sort $(wildcard $(DESIGN_HOME)/src/$(DESIGN_NICKNAME)/*.v))
 export SDC_FILE      = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/two_phase_clk_constraint.sdc
 
+export ABC_RETIME_FOR_TWO_PHASE = 1
+
 export CORE_UTILIZATION = 45
 export PLACE_DENSITY_LB_ADDON = 0.2