(signed (specifier-type '(signed-byte #.sb!vm:n-word-bits)))
(unsigned (specifier-type '(unsigned-byte #.sb!vm:n-word-bits)))
(d-float (specifier-type 'double-float))
(signed (specifier-type '(signed-byte #.sb!vm:n-word-bits)))
(unsigned (specifier-type '(unsigned-byte #.sb!vm:n-word-bits)))
(d-float (specifier-type 'double-float))