code: def _atomic_cas_abstract_eval(ref_aval, cmp_aval, val_aval):
      if cmp_aval.dtype != val_aval.dtype:
          raise ValueError("Dtypes in cmp/val need to match")
      if ref_aval.shape:
          raise ValueError("Ref must be scalar.")
      if cmp_aval.shape:
          raise ValueError("Cmp must be scalar.")
      if val_aval.shape:
          raise ValueError("Val must be scalar.")
      if cmp_aval.shape != val_aval.shape:
          raise ValueError("Dtypes in cmp/val need to match")
      return jax_core.ShapedArray(val_aval.shape, val_aval.dtype), {
          state.WriteEffect(0)
      }
  
imports: from __future__ import annotations
  import enum
  import functools
  from typing import Any
  import jax
  from jax import lax
  from jax import tree_util
  from jax._src import ad_util
  from jax._src import core
  from jax._src import pretty_printer
  from jax._src import state
  from jax._src.util import safe_map, safe_zip
  from jax._src.state import discharge
  from jax._src.state import indexing
  from jax._src.state import primitives
  from jax.interpreters import ad
  from jax.interpreters import mlir
  from jax.interpreters import xla
  import jax.numpy
  from jax._src.pallas import core
label_desc: Use image node_id 8 for calling a global function with example usage: _atomic_cas_abstract_eval(ref_aval, cmp_aval, val_aval) and returns: jax_core,  unknown