From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Using the GNU GMP Library for Bignums in Emacs Date: Thu, 03 May 2018 20:49:38 +0300 Message-ID: <838t90pr2l.fsf@gnu.org> References: <29f933ac-a6bf-8742-66a7-0a9d6d3e5a88@disroot.org> <83bmecy6fx.fsf@gnu.org> <0d3175d8-d996-651e-b221-71978bde3a65@cs.ucla.edu> <42cbc5ab-2f02-4aa5-4b19-7b2357f91692@cs.ucla.edu> <1f58acbf-a7d8-bf4e-3d0e-a285515a22e6@cs.ucla.edu> <2549728d-8e40-b46a-009e-07cef0c24208@cs.ucla.edu> <63fdd138-77d3-89b9-aa69-490300f588a9@cs.ucla.edu> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1525369680 12309 195.159.176.226 (3 May 2018 17:48:00 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 3 May 2018 17:48:00 +0000 (UTC) Cc: eggert@cs.ucla.edu, rms@gnu.org, emacs-devel@gnu.org To: Helmut Eller Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu May 03 19:47:56 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fEIKh-00034L-DX for ged-emacs-devel@m.gmane.org; Thu, 03 May 2018 19:47:55 +0200 Original-Received: from localhost ([::1]:58007 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fEIMo-0003ww-F4 for ged-emacs-devel@m.gmane.org; Thu, 03 May 2018 13:50:06 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:37170) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fEIMe-0003wq-QW for emacs-devel@gnu.org; Thu, 03 May 2018 13:49:57 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fEIMe-0000QC-4L for emacs-devel@gnu.org; Thu, 03 May 2018 13:49:56 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:44421) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fEIMX-0000P2-FD; Thu, 03 May 2018 13:49:49 -0400 Original-Received: from [176.228.60.248] (port=2206 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1fEIMQ-0002dp-8B; Thu, 03 May 2018 13:49:42 -0400 In-reply-to: (message from Helmut Eller on Thu, 03 May 2018 08:26:05 +0200) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:225051 Archived-At: > From: Helmut Eller > Date: Thu, 03 May 2018 08:26:05 +0200 > Cc: Paul Eggert , rms@gnu.org > > I think the bitwise operations and the resulting negative numbers are > the problematic part: > > E.g. > > (format "%016x" (lognot 257)) => "3ffffffffffffefe" > > but the 16-hex-digit string should be "fffffffffffffefe". But a 16-hex-digit fffffffffffffefe is not a fixnum, right?