(sc-number-or-lose 'fp-double-zero)
nil))))
+(!def-vm-support-routine boxed-immediate-sc-p (sc)
+ (or (eql sc (sc-number-or-lose 'zero))
+ (eql sc (sc-number-or-lose 'null))
+ (eql sc (sc-number-or-lose 'immediate))))
\f
;;;; Function Call Parameters