synth: clockgate command demo for sky130hd

widlarizer · widlarizer · commit 53f91ae51127 · 2024-10-17T13:52:33.000+02:00
diff --git a/flow/platforms/sky130hd/config.mk b/flow/platforms/sky130hd/config.mk
@@ -77,6 +77,9 @@ export ADDER_MAP_FILE ?= $(PLATFORM_DIR)/cells_adders_hd.v
 # Define ABC driver and load
 export ABC_DRIVER_CELL = sky130_fd_sc_hd__buf_1
 export ABC_LOAD_IN_FF = 5
+
+export CLOCKGATE_CMD = clockgate -pos sky130_fd_sc_hd__dlclkp_4 GATE:CLK:GCLK -min_net_size 8
+
 #--------------------------------------------------------
 # Floorplan
 # -------------------------------------------------------
diff --git a/flow/scripts/synth.tcl b/flow/scripts/synth.tcl
@@ -40,6 +40,8 @@ foreach cell $::env(DONT_USE_CELLS) {
   lappend dfflibmap_args -dont_use $cell
 }
 
+yosys $::env(CLOCKGATE_CMD)
+
 # Technology mapping of flip-flops
 # dfflibmap only supports one liberty file
 if {[env_var_exists_and_non_empty DFF_LIB_FILE]} {

Original file line number	Diff line number	Diff line change
`@@ -40,6 +40,8 @@ foreach cell $::env(DONT_USE_CELLS) {`
`40`	`40`	`lappend dfflibmap_args -dont_use $cell`
`41`	`41`	`}`
`42`	`42`
	`43`	`+yosys $::env(CLOCKGATE_CMD)`
	`44`	`+`
`43`	`45`	`# Technology mapping of flip-flops`
`44`	`46`	`# dfflibmap only supports one liberty file`
`45`	`47`	`if {[env_var_exists_and_non_empty DFF_LIB_FILE]} {`