Apply selected improvements from 1ceac6e: enhanced RISC-V parser, ImmediateOperand enhancements, and rv6→rv64 file renames

- Enhanced ImmediateOperand with reloc_type and symbol attributes for better RISC-V support
- Updated RISC-V parser with relocation type support (%hi, %lo, %pcrel_hi, etc.)
- Renamed example files from rv6 to rv64 for consistency
- Updated related configuration and test files
- All 115 tests pass successfully

osaca/parser/immediate.py

@@ -10,6 +10,8 @@ class ImmediateOperand(Operand):
         imd_type=None,
         value=None,
         shift=None,
+        reloc_type=None,
+        symbol=None,
         source=False,
         destination=False,
     ):
@@ -18,6 +20,8 @@ class ImmediateOperand(Operand):
         self._imd_type = imd_type
         self._value = value
         self._shift = shift
+        self._reloc_type = reloc_type
+        self._symbol = symbol
 
     @property
     def identifier(self):
@@ -33,7 +37,15 @@ class ImmediateOperand(Operand):
 
     @property
     def shift(self):
-        return self._imd_type
+        return self._shift
+
+    @property
+    def reloc_type(self):
+        return self._reloc_type
+
+    @property
+    def symbol(self):
+        return self._symbol
 
     @imd_type.setter
     def imd_type(self, itype):
@@ -51,10 +63,19 @@ class ImmediateOperand(Operand):
     def shift(self, shift):
         self._shift = shift
 
+    @reloc_type.setter
+    def reloc_type(self, reloc_type):
+        self._reloc_type = reloc_type
+
+    @symbol.setter
+    def symbol(self, symbol):
+        self._symbol = symbol
+
     def __str__(self):
         return (
             f"Immediate(identifier={self._identifier}, imd_type={self._imd_type}, "
-            f"value={self._value}, shift={self._shift}, source={self._source}, destination={self._destination})"
+            f"value={self._value}, shift={self._shift}, reloc_type={self._reloc_type}, "
+            f"symbol={self._symbol}, source={self._source}, destination={self._destination})"
         )
 
     def __repr__(self):
@@ -62,10 +83,18 @@ class ImmediateOperand(Operand):
 
     def __eq__(self, other):
         if isinstance(other, ImmediateOperand):
+            # Handle cases where old instances might not have the new attributes
+            self_reloc_type = getattr(self, "_reloc_type", None)
+            self_symbol = getattr(self, "_symbol", None)
+            other_reloc_type = getattr(other, "_reloc_type", None)
+            other_symbol = getattr(other, "_symbol", None)
+
             return (
                 self._identifier == other._identifier
                 and self._imd_type == other._imd_type
                 and self._value == other._value
                 and self._shift == other._shift
+                and self_reloc_type == other_reloc_type
+                and self_symbol == other_symbol
             )
         return False