Revert to simpler (and we hope faster) TAGGEDP

Suggested by Mattias Engdegård (bug#80021#17).
* src/lisp.h (lisp_h_FIXNUMP, lisp_h_TAGGEDP):
Go back to the simpler (X&7) == TAG approach for checking object tags.
This reverses my commit ccdb08ef4ed8f96e79aa06cf5e806c9c487d58ad
“Improve performance of CONSP, FIXNUMP, etc.”
dated 2018-08-25 13:39:18 -0700,
though it keeps the TAGGEDP function the older commit introduced.
Although the older commit improved performance on its circa 2010
platform, when I ran today’s ‘make -C lisp compile-always’
benchmark on Ubuntu 25.10 which uses gcc (Ubuntu 15.2.0-4ubuntu4)
on an circa-2021 Intel Xeon W-1350, this patch makes the
‘make -C lisp compile-always’ benchmark 3.1% faster.  Although the
patch unfortunately also makes the Emacs text segment 0.6% larger,
in this case speed and simplicity beat text size in importance.

0 files changed, 0 insertions, 0 deletions