Port Qnil==0 changes to 32-bit --with-wide-int

* lisp.h (lisp_h_XSYMBOL, XSYMBOL): Assume USE_LSB_TAG in the
macro-implemented version.  For the non-USE_LSB_TAG case, supply
a new inline function that is the inverse of the new TAG_SYMPTR.
(lisp_h_XUNTAGBASE, XUNTAGBASE): Remove.  All uses removed.
(TAG_SYMPTR) [!USE_LSB_TAG]: If the pointer subtraction yields a
negative number, don't allow sign bits to bleed into the encoded
value.  Shift in zero bits instead.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index b6358d0e66d..c05083590af 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -21,6 +21,15 @@
 
 2015-01-09  Paul Eggert  <eggert@cs.ucla.edu>
 
+        Port Qnil==0 changes to 32-bit --with-wide-int
+        * lisp.h (lisp_h_XSYMBOL, XSYMBOL): Assume USE_LSB_TAG in the
+        macro-implemented version.  For the non-USE_LSB_TAG case, supply
+        a new inline function that is the inverse of the new TAG_SYMPTR.
+        (lisp_h_XUNTAGBASE, XUNTAGBASE): Remove.  All uses removed.
+        (TAG_SYMPTR) [!USE_LSB_TAG]: If the pointer subtraction yields a
+        negative number, don't allow sign bits to bleed into the encoded
+        value.  Shift in zero bits instead.
+
         Refactor pointer-to-integer conversion
         * gfilenotify.c (monitor_to_lisp, lisp_to_monitor):
         Rename and move to lisp.h.  All uses changed.