0.6.10.14:

[sbcl.git] / src / compiler / generic / early-vm.lisp

diff --git a/src/compiler/generic/early-vm.lisp b/src/compiler/generic/early-vm.lisp
index c5f8a94..51ddc04 100644 (file)
--- a/src/compiler/generic/early-vm.lisp
+++ b/src/compiler/generic/early-vm.lisp
@@ -9,30 +9,30 @@
 
 (in-package "SB!VM")
 
-(defconstant lowtag-bits 3
-  #!+sb-doc
-  "Number of bits at the low end of a pointer used for type information.")
-
-(defconstant lowtag-mask (1- (ash 1 lowtag-bits))
-  #!+sb-doc
-  "Mask to extract the low tag bits from a pointer.")
-
-(defconstant lowtag-limit (ash 1 lowtag-bits)
-  #!+sb-doc
-  "Exclusive upper bound on the value of the low tag bits from a pointer.")
-
-(defconstant type-bits 8
-  #!+sb-doc
-  "Number of bits used in the header word of a data block to store the type.")
+;;; the number of bits at the low end of a pointer used for type
+;;; information
+(defconstant lowtag-bits 3)
+;;; a mask to extract the low tag bits from a pointer
+(defconstant lowtag-mask (1- (ash 1 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 type-mask (1- (ash 1 type-bits))
-  #!+sb-doc
-  "Mask to extract the type from a header word.")
+;;; the number of bits used in the header word of a data block to store
+;;; the type
+(defconstant type-bits 8)
+;;; a mask to extract the type from a data block header word
+(defconstant type-mask (1- (ash 1 type-bits)))
 
-;;; FIXME: Couldn't/shouldn't these be DEFCONSTANT instead of DEFPARAMETER?
+;;; 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))
   #!+sb-doc
-  "most-positive-fixnum in the target architecture.")
+  "most-positive-fixnum in the target architecture")
 (defparameter *target-most-negative-fixnum* (ash -1 29)
   #!+sb-doc
-  "most-negative-fixnum in the target architecture.")
+  "most-negative-fixnum in the target architecture")