From 376c22b06e525b4a5a8c60412620e25c33ceceb8 Mon Sep 17 00:00:00 2001
From: Dmitry Selyutin <ghostmansd@gmail.com>
Date: Sun, 6 Nov 2022 12:29:55 +0300
Subject: [PATCH] power_insn: support tables priorities

---
 openpower/isatables/insndb.csv      | 26 ++++++++++++------------
 src/openpower/decoder/power_insn.py | 31 ++++++++++++++++++++++++++++-
 2 files changed, 43 insertions(+), 14 deletions(-)

diff --git a/openpower/isatables/insndb.csv b/openpower/isatables/insndb.csv
index 80b483de..b8f8ad2f 100644
--- a/openpower/isatables/insndb.csv
+++ b/openpower/isatables/insndb.csv
@@ -1,13 +1,13 @@
-path,opcode,bitsel,suffix,mode
-minor_19.csv,19,21:30,NONE,pattern
-minor_30.csv,30,27:30,NONE,pattern
-minor_31.csv,31,21:30,0b101,integer
-minor_58.csv,58,30:31,NONE,integer
-minor_62.csv,62,30:31,NONE,integer
-minor_22.csv,22,21:31,NONE,pattern
-minor_5.csv,5,21:31,NONE,pattern
-minor_4.csv,4,26:31,NONE,integer
-minor_63.csv,63,21:30,NONE,pattern
-minor_59.csv,59,21:30,NONE,pattern
-major.csv,NONE,0:5,NONE,integer
-extra.csv,NONE,0:31,NONE,pattern
+path,opcode,bitsel,suffix,mode,priority
+minor_19.csv,19,21:30,NONE,pattern,normal
+minor_30.csv,30,27:30,NONE,pattern,normal
+minor_31.csv,31,21:30,0b101,integer,normal
+minor_58.csv,58,30:31,NONE,integer,normal
+minor_62.csv,62,30:31,NONE,integer,normal
+minor_22.csv,22,21:31,NONE,pattern,normal
+minor_5.csv,5,21:31,NONE,pattern,normal
+minor_4.csv,4,26:31,NONE,integer,normal
+minor_63.csv,63,21:30,NONE,pattern,normal
+minor_59.csv,59,21:30,NONE,pattern,normal
+major.csv,NONE,0:5,NONE,integer,normal
+extra.csv,NONE,0:31,NONE,pattern,high
diff --git a/src/openpower/decoder/power_insn.py b/src/openpower/decoder/power_insn.py
index cc5d0e5c..1eabff03 100644
--- a/src/openpower/decoder/power_insn.py
+++ b/src/openpower/decoder/power_insn.py
@@ -62,6 +62,29 @@ class Verbosity(_enum.Enum):
         return (self.value < other.value)
 
 
+@_functools.total_ordering
+class Priority(_enum.Enum):
+    LOW = -1
+    NORMAL = 0
+    HIGH = +1
+
+    @classmethod
+    def _missing_(cls, value):
+        if isinstance(value, str):
+            value = value.upper()
+        try:
+            return cls[value]
+        except ValueError:
+            return super()._missing_(value)
+
+    def __lt__(self, other):
+        if not isinstance(other, self.__class__):
+            return NotImplemented
+
+        # NOTE: the order is inversed, LOW < NORMAL < HIGH
+        return (self.value > other.value)
+
+
 def dataclass(cls, record, keymap=None, typemap=None):
     if keymap is None:
         keymap = {}
@@ -488,6 +511,12 @@ class Section:
     suffix: Suffix
     mode: Mode
     opcode: IntegerOpcode = None
+    priority: Priority = Priority.NORMAL
+
+    def __lt__(self, other):
+        if not isinstance(other, self.__class__):
+            return NotImplemented
+        return (self.priority < other.priority)
 
     @classmethod
     def CSV(cls, record):
@@ -2335,7 +2364,7 @@ class PPCDatabase:
         records = _collections.defaultdict(set)
         path = (root / "insndb.csv")
         with open(path, "r", encoding="UTF-8") as stream:
-            for section in parse(stream, Section.CSV):
+            for section in sorted(parse(stream, Section.CSV)):
                 path = (root / section.path)
                 opcode_cls = {
                     section.Mode.INTEGER: IntegerOpcode,
-- 
2.30.2