Merge pull request #2717 from jeffng-or/at-spi-update

SPI AutoTuner and base config updates

Author: maliberty

flow/designs/ihp-sg13g2/spi/autotuner.json

@@ -3,24 +3,24 @@
     "_SDC_CLK_PERIOD": {
         "type": "float",
         "minmax": [
-            1.0,
-            4.3647
+            0.8,
+            1.1
         ],
         "step": 0
     },
     "CORE_UTILIZATION": {
         "type": "int",
         "minmax": [
-            5,
-            30
+            20,
+            50
         ],
         "step": 1
     },
     "CORE_ASPECT_RATIO": {
         "type": "float",
         "minmax": [
             0.5,
-            2.0
+            1.5
         ],
         "step": 0
     },
@@ -35,16 +35,16 @@
     "CELL_PAD_IN_SITES_GLOBAL_PLACEMENT": {
         "type": "int",
         "minmax": [
-            1,
-            5
+            0,
+            3
         ],
         "step": 1
     },
     "CELL_PAD_IN_SITES_DETAIL_PLACEMENT": {
         "type": "int",
         "minmax": [
-            1,
-            5
+            0,
+            3
         ],
         "step": 1
     },
@@ -60,7 +60,7 @@
         "type": "float",
         "minmax": [
             0.0,
-            0.99
+            0.2
         ],
         "step": 0
     },

flow/designs/ihp-sg13g2/spi/config.mk

@@ -7,5 +7,11 @@ export SDC_FILE      = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/constraint.
 export USE_FILL = 1
 
 export PLACE_DENSITY ?= 0.88
-export CORE_UTILIZATION = 20
+export CORE_UTILIZATION = 27
+export CORE_ASPECT_RATIO = 1.4
 export TNS_END_PERCENT = 100
+
+# AutoTuner result settings
+export CELL_PAD_IN_SITES_GLOBAL_PLACEMENT = 2
+export CELL_PAD_IN_SITES_DETAIL_PLACEMENT = 0
+export PLACE_DENSITY_LB_ADDON = 0.02

flow/designs/ihp-sg13g2/spi/constraint.sdc

@@ -2,7 +2,7 @@ current_design spi
 
 set clk_name  core_clock
 set clk_port_name clk
-set clk_period 10.4
+set clk_period 0.9
 set clk_io_pct 0.2
 
 set clk_port [get_ports $clk_port_name]