;;; the number of bits at the low end of a pointer used for type
;;; information
-(defconstant n-lowtag-bits 3)
+(def!constant n-lowtag-bits 3)
;;; a mask to extract the low tag bits from a pointer
-(defconstant lowtag-mask (1- (ash 1 n-lowtag-bits)))
+(def!constant lowtag-mask (1- (ash 1 n-lowtag-bits)))
;;; the exclusive upper bound on the value of the low tag bits from a
;;; pointer
-(defconstant lowtag-limit (ash 1 n-lowtag-bits))
+(def!constant lowtag-limit (ash 1 n-lowtag-bits))
;;; the number of bits used in the header word of a data block to store
;;; the type
-(defconstant n-widetag-bits 8)
+(def!constant n-widetag-bits 8)
;;; a mask to extract the type from a data block header word
-(defconstant widetag-mask (1- (ash 1 n-widetag-bits)))
+(def!constant widetag-mask (1- (ash 1 n-widetag-bits)))
-;;; FIXME: Couldn't/shouldn't these be DEFCONSTANT instead of
-;;; DEFPARAMETER? (It might seem even more tempting to make them
-;;; SB!XC:MOST-POSITIVE-FIXNUM and SB!XC:MOST-NEGATIVE-FIXNUM,
-;;; but that's probably not a good idea, since then we'd need
-;;; to worry about the effect of UNCROSS in expressions like
-;;; (DEFTYPE INDX3 () `(INTEGER 3 ,SB!XC:MOST-POSITIVE-FIXNUM)).)
-(defparameter *target-most-positive-fixnum* (1- (ash 1 29))
+(def!constant sb!xc:most-positive-fixnum (1- (ash 1 29))
#!+sb-doc
- "most-positive-fixnum in the target architecture")
-(defparameter *target-most-negative-fixnum* (ash -1 29)
+ "the fixnum closest in value to positive infinity")
+(def!constant sb!xc:most-negative-fixnum (ash -1 29)
#!+sb-doc
- "most-negative-fixnum in the target architecture")
+ "the fixnum closest in value to negative infinity")