[Analysis] try to infer restype-to-index dynamically from report

src/finn/analysis/fpgadataflow/post_synth_res.py

@@ -58,7 +58,6 @@ def post_synth_res(model, override_synth_report_filename=None):
     else:
         raise Exception("Please run synthesis first")
 
-    # TODO build these indices based on table headers instead of harcoding
     restype_to_ind_default = {
         "LUT": 2,
         "SRL": 5,
@@ -74,13 +73,36 @@ def post_synth_res(model, override_synth_report_filename=None):
         "BRAM_36K": 9,
         "BRAM_18K": 10,
         "URAM": 11,
-        "DSP48": 12,
+        "DSP": 12,
     }
 
-    if model.get_metadata_prop("platform") == "alveo":
-        restype_to_ind = restype_to_ind_vitis
+    # format: (human_readable_name_in_report, canonical_name)
+    res_types_to_search = [
+        ("Total LUTs", "LUT"),
+        ("SRLs", "SRL"),
+        ("FFs", "FF"),
+        ("RAMB36", "BRAM_36K"),
+        ("RAMB18", "BRAM_18K"),
+        ("URAM", "URAM"),
+        ("DSP Blocks", "DSP"),
+    ]
+
+    # try to infer resource type to table index by
+    # looking at the names in headings
+    header_row = root.findall(".//*[@contents='Instance']/..")
+    if header_row != []:
+        headers = [x.attrib["contents"] for x in list(header_row[0])]
+        restype_to_ind = {}
+        for res_type_name, res_type in res_types_to_search:
+            if res_type_name in headers:
+                restype_to_ind[res_type] = headers.index(res_type_name)
     else:
-        restype_to_ind = restype_to_ind_default
+        # could not infer resource types from header
+        # fall back to default indices
+        if model.get_metadata_prop("platform") == "alveo":
+            restype_to_ind = restype_to_ind_vitis
+        else:
+            restype_to_ind = restype_to_ind_default
 
     def get_instance_stats(inst_name):
         row = root.findall(".//*[@contents='%s']/.." % inst_name)