+ bit fixnum
+ #!+#.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or))
+ (unsigned-byte 32)
+ #!+#.(cl:if (cl:= 64 sb!vm:n-word-bits) '(and) '(or))
+ (unsigned-byte 64)
+ #!+#.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or))
+ (signed-byte 32)
+ #!+#.(cl:if (cl:= 64 sb!vm:n-word-bits) '(and) '(or))
+ (signed-byte 64)