Fix macro generation

1) We need to add ULL modifier to all values to fix some issues with `set_field` and `get_field` OpenOCD macros (for example, when `mask` = 1 << 31, it leads to UB becuase of signed overflow)

registers.py

@@ -386,26 +386,17 @@ def prototype(self):
     def body(self):
         return self.expression
 
-def sympy_to_c(expression, sym_to_c = lambda s: "(" + str(s) + ")"):
+def sympy_to_c(expression, sym_to_c = lambda s: f"({s})", unsigned=True):
     """Implement our own string function, so we can replace 2** with 1<<."""
-    stc = lambda x : sympy_to_c(x, sym_to_c)
+    stc = lambda x : sympy_to_c(x, sym_to_c, unsigned)
     if isinstance(expression, str):
         return expression
     if isinstance(expression, sympy.Number):
-        if (expression >= 2**32):
-            return "0x%xULL" % expression
-        elif (expression >= 2**31):
-            return "0x%xU" % expression
-        elif (expression >= 10):
-            return "0x%x" % expression
-        elif (expression > -10):
-            return "%d" % expression
-        elif (expression > -2**31):
-            return "-0x%x" % -expression
-        elif (expression > -2**32):
-            return "-0x%xU" % -expression
+        suffix = "ULL" if unsigned else ""
+        if (expression < 10 and expression > -10):
+            return "%d%s" % (expression, suffix)
         else:
-            return "-0x%xULL" % -expression
+            return "%#0x%s" % (expression, suffix)
     elif isinstance(expression, sympy.Symbol):
         return sym_to_c(expression)
     elif isinstance(expression, sympy.Add):
@@ -502,7 +493,7 @@ def print_cgetters( registers_list, fd_h, fd_c):
     fd_h.write(Register.c_field_list_type())
     fd_h.write(Register.c_info_type())
 
-    to_c = lambda string: sympy_to_c(sympy.simplify(string), lambda s: f"context.{s}.value")
+    to_c = lambda string: sympy_to_c(sympy.simplify(string), lambda s: f"context.{s}.value", False)
     is_valid = lambda s: f"context.{s}.is_set"
 
     for r in all_regs: