X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fbignum.lisp;h=c07fc192847b4b01754a2b4d357869d7312b59d4;hb=731da68c7e3b7f2c4bc310aa75fc75f5aead24d2;hp=9374acc1c0580919454f9ee5e7158575264c4074;hpb=e6aef26131543d369edf107df8fb94053646d1f4;p=sbcl.git

diff --git a/src/code/bignum.lisp b/src/code/bignum.lisp
index 9374acc..c07fc19 100644
--- a/src/code/bignum.lisp
+++ b/src/code/bignum.lisp
@@ -1320,16 +1320,18 @@
 
 (defun bignum-logcount (bignum)
   (declare (type bignum-type bignum))
-  (let* ((length (%bignum-length bignum))
-         (plusp (%bignum-0-or-plusp bignum length))
-         (result 0))
+  (let ((length (%bignum-length bignum))
+        (result 0))
     (declare (type bignum-index length)
              (fixnum result))
     (do ((index 0 (1+ index)))
-        ((= index length) result)
+        ((= index length)
+         (if (%bignum-0-or-plusp bignum length)
+             result
+             (- (* length digit-size) result)))
       (let ((digit (%bignum-ref bignum index)))
         (declare (type bignum-element-type digit))
-        (incf result (logcount (if plusp digit (%lognot digit))))))))
+        (incf result (logcount digit))))))
 
 ;;;; logical operations