odb: reverse scan list to keep correct order of scan insts

Signed-off-by: Arthur Koucher <arthurkoucher@precisioninno.com>

Author: AcKoucher

src/dft/test/scandef_sky130.defok

@@ -112,8 +112,8 @@ SCANCHAINS 9 ;
   ff6_clk2_falling ( IN SCD ) ( OUT Q )
   ff2_clk2_falling ( IN SCD ) ( OUT Q )
 + ORDERED
-  ff8_clk2_falling ( IN SCD ) ( OUT Q )
   mux1 ( IN A0 ) ( OUT X )
+  ff8_clk2_falling ( IN SCD ) ( OUT Q )
 + PARTITION main_clock_falling
 + STOP PIN output1 ;
 
@@ -138,8 +138,8 @@ SCANCHAINS 9 ;
   ff8_clk2_rising ( IN SCD ) ( OUT Q )
   ff2_clk2_rising ( IN SCD ) ( OUT Q )
 + ORDERED
-  ff6_clk2_rising ( IN SCD ) ( OUT Q )
   iso ( IN A ) ( OUT X )
+  ff6_clk2_rising ( IN SCD ) ( OUT Q )
 + PARTITION main_clock_rising
 + STOP PIN ff6_clk2_rising/SCD ;
 

src/odb/src/defin/definReader.cpp

@@ -1427,6 +1427,12 @@ int definReader::scanchainsCallback(
                        out_pin_name,
                        bits[i]);
     }
+
+    dbSet<dbScanInst> db_scan_insts = db_scan_list->getScanInsts();
+
+    if (db_scan_insts.reversible() && db_scan_insts.orderReversed()) {
+      db_scan_insts.reverse();
+    }
   }
 
   return PARSE_OK;