[BUG] MemoryError on field assignment

[Furetur]

• [x] I have reviewed this project's contribution guidelines

Describe the bug The SystemRDL compiler always checks if VALUE fits in WIDTH in the following construction: field {...} F[WIDTH] = VALUE. However, this validation code crashes if WIDTH is too large.

For example, compiling the following code crashes the compiler (I compile with peakrdl dump main.rdl)

addrmap name {
    reg {
        field { } f[-1] = 1; // Here -1 becomes 18446744073709551614 according to the SystemRDL Spec
    } R;
};

Error:

Traceback (most recent call last):
  File "...", line 8, in <module>
    sys.exit(main())
  File ".../venv/lib/python3.8/site-packages/peakrdl/main.py", line 183, in main
    options.subcommand.main(importers, options)
  File ".../venv/lib/python3.8/site-packages/peakrdl/subcommand.py", line 151, in main
    top = process_input.elaborate(rdlc, parameters, options)
  File ".../venv/lib/python3.8/site-packages/peakrdl/process_input.py", line 145, in elaborate
    root = rdlc.elaborate(
  File ".../venv/lib/python3.8/site-packages/systemrdl/compiler.py", line 421, in elaborate
    walker.RDLWalker(skip_not_present=True).walk(root_node, ValidateListener(self.env))
  File ".../venv/lib/python3.8/site-packages/systemrdl/walker.py", line 159, in walk
    self.walk(child, *listeners)
  File ".../venv/lib/python3.8/site-packages/systemrdl/walker.py", line 159, in walk
    self.walk(child, *listeners)
  File ".../venv/lib/python3.8/site-packages/systemrdl/walker.py", line 159, in walk
    self.walk(child, *listeners)
  File ".../venv/lib/python3.8/site-packages/systemrdl/walker.py", line 150, in walk
    self.current_action = self.do_enter(node, listener)
  File ".../venv/lib/python3.8/site-packages/systemrdl/walker.py", line 176, in do_enter
    action = listener.enter_Component(node) or WalkerAction.Continue
  File ".../venv/lib/python3.8/site-packages/systemrdl/core/validate.py", line 44, in enter_Component
    prop_rule.validate(node, prop_value)
  File ".../venv/lib/python3.8/site-packages/systemrdl/properties/builtin.py", line 436, in validate
    if value >= (1 << node.width):
MemoryError

Version systemrdl-compiler==1.27.3

Expected behavior I expect the tool to not crash :)

It is possible to check if VALUE fits in WIDTH using logarithms instead of 1 << node.width. Maybe it will fix this issue