Identify instructions where vd is a source operand

code/find_vd_source.py

@@ -0,0 +1,65 @@
+import glob
+import re
+
+# Update site directory before running: `poetry run mkdocs build`
+
+for ext in ["lsx", "lasx"]:
+    arg_counts = {}
+
+    # find known insts from binutils-gdb
+    for line in open("../../binutils-gdb/opcodes/loongarch-opc.c"):
+        line = line.strip()
+        if line.startswith("{") and line.endswith("},"):
+            parts = line.split(",")
+            if '"' in parts[2]:
+                name = parts[2].split('"')[1]
+                fmt = line.split('"')[3]
+
+                arg_counts[name] = len(fmt.split(","))
+
+    # find documented intrinsics
+    for f in glob.glob(f"../site/{ext}/**/*.html", recursive=True):
+        # forgive me to use the simple but fragile way to parse html
+        for line in open(f, "r"):
+            if "h2" in line:
+                intrinsics = line.split(">")[1].split("<")[0]
+                arg_count = len(intrinsics.split(","))
+                if "__lsx_" in intrinsics:
+                    intr_name = intrinsics[intrinsics.find("__lsx_") + 6 :].split(" ")[0]
+                else:
+                    intr_name = intrinsics[intrinsics.find("__lasx_") + 7 :].split(" ")[0]
+
+                name = intr_name.replace("_", ".")
+
+                # align with gen_measure.py
+                if (
+                    re.match("x?vshuf\.[hwd]", name)
+                    or re.match("x?vm(add|sub).*", name)
+                    or re.match("x?vextrins.*", name)
+                    or re.match("x?vfrstp.*", name)
+                    or re.match("x?vinsve0.*", name)
+                    or re.match("x?vinsgr2vr.*", name)
+                    or re.match("x?vs?(srl|sra)r?ni.*", name)
+                    or name == "xvshuf4i.d"
+                    or name == "xvpermi.w"
+                    or name == "xvpermi.q"
+                    or name == "xvbitseli.b"
+                    or name == "vbitseli.b"
+                    or name == "vpermi.w"
+                    or name == "vshuf4i.d"
+                ):
+                    vd_source = True
+                else:
+                    vd_source = False
+
+                if name.startswith("vst") or name.startswith("xvst"):
+                    continue
+
+                if name in arg_counts:
+                    binutils_arg_count = arg_counts[name]
+                    if arg_count + 1 != binutils_arg_count and vd_source == False:
+                        print("Possible vd source not identified", intrinsics, name)
+                    elif arg_count + 1 == binutils_arg_count and vd_source == True:
+                        print("Possible wrong vd source", intrinsics, name)
+                else:
+                    print("Missing", name)

code/gen_measure.py

@@ -28,7 +28,23 @@
                     print("Processing", name, fmt)
 
                     # handle instructions where vd/xd is also a source
-                    if re.match("x?vshuf\.[hwd]", name):
+                    # use find_vd_source.py
+                    if (
+                        re.match("x?vshuf\.[hwd]", name)
+                        or re.match("x?vm(add|sub).*", name)
+                        or re.match("x?vextrins.*", name)
+                        or re.match("x?vfrstp.*", name)
+                        or re.match("x?vinsve0.*", name)
+                        or re.match("x?vinsgr2vr.*", name)
+                        or re.match("x?vs?(srl|sra)r?ni.*", name)
+                        or name == "xvshuf4i.d"
+                        or name == "xvpermi.w"
+                        or name == "xvpermi.q"
+                        or name == "xvbitseli.b"
+                        or name == "vbitseli.b"
+                        or name == "vpermi.w"
+                        or name == "vshuf4i.d"
+                    ):
                         vd_source = True
                     else:
                         vd_source = False