(sap-stack non-descriptor-stack) ; System area pointers.
(single-stack non-descriptor-stack) ; single-floats
(double-stack non-descriptor-stack :element-size 2) ; double floats.
(sap-stack non-descriptor-stack) ; System area pointers.
(single-stack non-descriptor-stack) ; single-floats
(double-stack non-descriptor-stack :element-size 2) ; double floats.