nl_tokens: -------------------------------------------------------------------
pl_tokens: function AtomicsCompareExchangeJS ( sta , index , oldValue , newValue ) { CheckSharedIntegerTypedArray ( sta ) ; <mask> = ValidateIndex ( index , % _TypedArrayGetLength ( sta ) ) ; oldValue = TO_NUMBER ( oldValue ) ; newValue = TO_NUMBER ( newValue ) ; return % _AtomicsCompareExchange ( sta , index , oldValue , newValue ) ; }