Fix isa and mabi argument handling

When no target (and neither custom target) was specified, it defaulted to rv32imc
which overrode any isa and mabi supplied as arguments. This prevented setting any
custom isa and mabi from the command line. New behavior is to only override these
if they aren't set by the user explicitly (values specified with --isa and --mabi
options override --target).

Signed-off-by: Krzysztof Obłonczek <[email protected]>

run.py

@@ -934,44 +934,50 @@ def load_config(args, cwd):
             args.core_setting_dir = cwd + "/pygen/pygen_src/target/" + args.target
         else:
             args.core_setting_dir = cwd + "/target/" + args.target
+
         if args.target == "rv32imc":
-            args.mabi = "ilp32"
-            args.isa = "rv32imc"
+            mabi = "ilp32"
+            isa = "rv32imc"
         elif args.target == "rv32imafdc":
-            args.mabi = "ilp32"
-            args.isa = "rv32imafdc"
+            mabi = "ilp32"
+            isa = "rv32imafdc"
         elif args.target == "rv32imc_sv32":
-            args.mabi = "ilp32"
-            args.isa = "rv32imc"
+            mabi = "ilp32"
+            isa = "rv32imc"
         elif args.target == "multi_harts":
-            args.mabi = "ilp32"
-            args.isa = "rv32gc"
+            mabi = "ilp32"
+            isa = "rv32gc"
         elif args.target == "rv32imcb":
-            args.mabi = "ilp32"
-            args.isa = "rv32imcb"
+            mabi = "ilp32"
+            isa = "rv32imcb"
         elif args.target == "rv32i":
-            args.mabi = "ilp32"
-            args.isa = "rv32i"
+            mabi = "ilp32"
+            isa = "rv32i"
         elif args.target == "rv64imc":
-            args.mabi = "lp64"
-            args.isa = "rv64imc"
+            mabi = "lp64"
+            isa = "rv64imc"
         elif args.target == "rv64imcb":
-            args.mabi = "lp64"
-            args.isa = "rv64imcb"
+            mabi = "lp64"
+            isa = "rv64imcb"
         elif args.target == "rv64gc":
-            args.mabi = "lp64"
-            args.isa = "rv64gc"
+            mabi = "lp64"
+            isa = "rv64gc"
         elif args.target == "rv64gcv":
-            args.mabi = "lp64"
-            args.isa = "rv64gcv"
+            mabi = "lp64"
+            isa = "rv64gcv"
         elif args.target == "ml":
-            args.mabi = "lp64"
-            args.isa = "rv64imc"
+            mabi = "lp64"
+            isa = "rv64imc"
         elif args.target == "rv64imafdc":
-            args.mabi = "lp64"
-            args.isa = "rv64imafdc"
+            mabi = "lp64"
+            isa = "rv64imafdc"
         else:
             sys.exit("Unsupported pre-defined target: {}".format(args.target))
+
+        if not args.mabi:
+            args.mabi = mabi
+        if not args.isa:
+            args.isa = isa
     else:
         if re.match(".*gcc_compile.*", args.steps) or re.match(".*iss_sim.*",
                                                                args.steps):