X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fgeneric%2Fearly-vm.lisp;h=606b0872105d0dbe548df265932c88c2de183b65;hb=bc46c8bcdd6ac8918df8ea9e9db49808e4924fcf;hp=51ddc044b4ea451a8c033ad477342a4c1a311c7e;hpb=60011b86627fa68eeacffd49c49826e474c7fd82;p=sbcl.git

diff --git a/src/compiler/generic/early-vm.lisp b/src/compiler/generic/early-vm.lisp
index 51ddc04..606b087 100644
--- a/src/compiler/generic/early-vm.lisp
+++ b/src/compiler/generic/early-vm.lisp
@@ -11,28 +11,22 @@
 
 ;;; the number of bits at the low end of a pointer used for type
 ;;; information
-(defconstant lowtag-bits 3)
+(defconstant n-lowtag-bits 3)
 ;;; a mask to extract the low tag bits from a pointer
-(defconstant lowtag-mask (1- (ash 1 lowtag-bits)))
+(defconstant 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 lowtag-bits))
+(defconstant 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 type-bits 8)
+(defconstant n-widetag-bits 8)
 ;;; a mask to extract the type from a data block header word
-(defconstant type-mask (1- (ash 1 type-bits)))
+(defconstant 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))
+(defconstant 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")
+(defconstant 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")