From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-patches-return-296598-listarch-gcc-patches=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 17694 invoked by alias); 12 Jul 2011 00:23:53 -0000
Received: (qmail 17686 invoked by uid 22791); 12 Jul 2011 00:23:52 -0000
X-SWARE-Spam-Status: No, hits=-2.1 required=5.0	tests=AWL,BAYES_00
X-Spam-Check-By: sourceware.org
Received: from dair.pair.com (HELO dair.pair.com) (209.68.1.49)    by sourceware.org (qpsmtpd/0.43rc1) with SMTP; Tue, 12 Jul 2011 00:23:39 +0000
Received: (qmail 79598 invoked by uid 20157); 12 Jul 2011 00:23:38 -0000
Received: from localhost (sendmail-bs@127.0.0.1)  by localhost with SMTP; 12 Jul 2011 00:23:38 -0000
Date: Tue, 12 Jul 2011 03:50:00 -0000
From: Hans-Peter Nilsson <hp@bitrange.com>
To: Bernd Schmidt <bernds@codesourcery.com>
cc: GCC Patches <gcc-patches@gcc.gnu.org>
Subject: Re: Add __builtin_clrsb, similar to clz/ctz
In-Reply-To: <4DFFA1AE.7070405@codesourcery.com>
Message-ID: <alpine.BSF.2.00.1107112016300.73166@dair.pair.com>
References: <4DF9FA9A.8040505@codesourcery.com> <4DFA2E85.2030601@redhat.com> <4DFFA1AE.7070405@codesourcery.com>
User-Agent: Alpine 2.00 (BSF 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-IsSubscribed: yes
Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-patches.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>
List-Post: <mailto:gcc-patches@gcc.gnu.org>
List-Help: <mailto:gcc-patches-help@gcc.gnu.org>
Sender: gcc-patches-owner@gcc.gnu.org
X-SW-Source: 2011-07/txt/msg00867.txt.bz2

On Mon, 20 Jun 2011, Bernd Schmidt wrote:
> New patch below. Retested on i686 and bfin.

Yay, bikeshedding opportunity! :P
Can we call them "leading *repeated* sign bits"? (in docs and
comments)  Calling them "redundant" makes you think the
representation is  not two's complement but new and improved...
like (bitwise) (1<<31) == -1 or something.

brgds, H-P
PS. just a minor change, I can do the legwork.