X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fgeneric%2Fearly-vm.lisp;h=9b854eaaa302342ec71bdda2252883656209ee4f;hb=75b52379bdc2269961af6a1308eca63610f38ac3;hp=1e7ec1c1d9835f378bc6abb9146da055f3683cf3;hpb=4af254de85367806d14ccafc4dfbe79a235b926d;p=sbcl.git

diff --git a/src/compiler/generic/early-vm.lisp b/src/compiler/generic/early-vm.lisp
index 1e7ec1c..9b854ea 100644
--- a/src/compiler/generic/early-vm.lisp
+++ b/src/compiler/generic/early-vm.lisp
@@ -25,6 +25,12 @@
 ;;; the bit width of positive fixnums
 (def!constant n-positive-fixnum-bits (- n-word-bits n-fixnum-tag-bits 1))
 
+;;; the number of bits to shift between word addresses and byte addresses
+(def!constant word-shift (1- (integer-length (/ n-word-bits n-byte-bits))))
+
+;;; the number of bytes in a word
+(def!constant n-word-bytes (/ n-word-bits n-byte-bits))
+
 ;;; the number of bits used in the header word of a data block to store
 ;;; the type
 (def!constant n-widetag-bits 8)