Change configs and metrics for MPL fixes

1. Update metrics for ihp-sg13g2/i2c-gpio-expander
| Metric                                        | Old      | New      | Type     |
| ------                                        | ---      | ---      | ----     |
| placeopt__design__instance__count__stdcell    |      983 |      965 | Tighten  |
| cts__design__instance__count__setup_buffer    |       86 |       84 | Tighten  |
| cts__design__instance__count__hold_buffer     |       86 |       84 | Tighten  |
| globalroute__antenna_diodes_count             |      156 |       18 | Tighten  |
| detailedroute__route__wirelength              |    42588 |    39121 | Tighten  |
| detailedroute__antenna_diodes_count           |        5 |       22 | Failing  |
| finish__design__instance__area                |   136013 |   135868 | Tighten  |
| finish__timing__drv__setup_violation_count    |       43 |       42 | Tighten  |

2. Decrease asap7/aes-block density to make registers closer to each
   other and avoid CTS high skew;
3. Decrease minimum aspect ratio for sky130hd/uW std cell clusters in MPL.

Signed-off-by: Arthur Koucher <[email protected]>

Author: AcKoucher

flow/designs/asap7/aes-block/config.mk

@@ -11,7 +11,7 @@ export ABC_AREA               = 1
 export CORE_UTILIZATION       = 20
 export CORE_ASPECT_RATIO      = 1
 export CORE_MARGIN            = 2
-export PLACE_DENSITY          = 0.60
+export PLACE_DENSITY          = 0.53
 
 export BLOCKS ?= aes_rcon aes_sbox
 export SYNTH_HIERARCHICAL = 1

flow/designs/ihp-sg13g2/i2c-gpio-expander/rules-base.json

@@ -12,27 +12,27 @@
         "compare": "<="
     },
     "placeopt__design__instance__count__stdcell": {
-        "value": 983,
+        "value": 965,
         "compare": "<="
     },
     "detailedplace__design__violations": {
         "value": 0,
         "compare": "=="
     },
     "cts__design__instance__count__setup_buffer": {
-        "value": 86,
+        "value": 84,
         "compare": "<="
     },
     "cts__design__instance__count__hold_buffer": {
-        "value": 86,
+        "value": 84,
         "compare": "<="
     },
     "globalroute__antenna_diodes_count": {
-        "value": 156,
+        "value": 18,
         "compare": "<="
     },
     "detailedroute__route__wirelength": {
-        "value": 42588,
+        "value": 39121,
         "compare": "<="
     },
     "detailedroute__route__drc_errors": {
@@ -44,19 +44,19 @@
         "compare": "<="
     },
     "detailedroute__antenna_diodes_count": {
-        "value": 5,
+        "value": 22,
         "compare": "<="
     },
     "finish__timing__setup__ws": {
         "value": 0.0,
         "compare": ">="
     },
     "finish__design__instance__area": {
-        "value": 136013,
+        "value": 135868,
         "compare": "<="
     },
     "finish__timing__drv__setup_violation_count": {
-        "value": 43,
+        "value": 42,
         "compare": "<="
     },
     "finish__timing__drv__hold_violation_count": {

flow/designs/sky130hd/microwatt/config.mk

@@ -33,6 +33,9 @@ export MACRO_BLOCKAGE_HALO = 151
 # higher density in order to run.
 export PLACE_DENSITY = 0.2
 
+# Extra effort to ease routing: avoid very tall std cell clusters in MPL.
+export RTLMP_MIN_AR = 0.40
+
 # CTS tuning
 export CTS_BUF_DISTANCE = 600
 export SKIP_GATE_CLONING = 1