tools/reg_filter.py: Tool to add IMPDEF sysreg names to a disasm

Signed-off-by: Hector Martin <marcan@marcan.st>

tools/reg_filter.py

@@ -0,0 +1,23 @@
+import json, sys, re
+import argparse
+
+parser = argparse.ArgumentParser()
+parser.add_argument("regfile")
+args = parser.parse_args()
+
+data = json.load(open(args.regfile))
+
+name_map = {}
+
+for reg in data:
+    name = reg['name']
+    enc = reg['enc']
+    name_map[f"s{enc[0]}_{enc[1]}_c{enc[2]}_c{enc[3]}_{enc[4]}"] = name
+
+def reg_lookup(m):
+    s = m.group(0)
+    return name_map.get(s, s)
+
+for line in sys.stdin:
+    line = re.sub(r"s(\d+)_(\d+)_c(\d+)_c(\d+)_(\d+)", reg_lookup, line)
+    sys.stdout.write(line)