From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <ruby-core-bounces@ruby-lang.org>
X-Original-To: poffice@blade.nagaokaut.ac.jp
Delivered-To: poffice@blade.nagaokaut.ac.jp
Received: from kankan.nagaokaut.ac.jp (kankan.nagaokaut.ac.jp [133.44.2.24])
	by blade.nagaokaut.ac.jp (Postfix) with ESMTP id 1F77117DB81B
	for <poffice@blade.nagaokaut.ac.jp>; Fri, 12 Sep 2014 12:20:14 +0900 (JST)
Received: from funfun.nagaokaut.ac.jp (funfun.nagaokaut.ac.jp [133.44.2.201])
	by kankan.nagaokaut.ac.jp (Postfix) with ESMTP id B063FB5D8CB
	for <poffice@blade.nagaokaut.ac.jp>; Fri, 12 Sep 2014 12:00:04 +0900 (JST)
Received: from funfun.nagaokaut.ac.jp (localhost.nagaokaut.ac.jp [127.0.0.1])
	by funfun.nagaokaut.ac.jp (Postfix) with ESMTP id 1528797A827
	for <poffice@blade.nagaokaut.ac.jp>; Fri, 12 Sep 2014 12:00:06 +0900 (JST)
X-Virus-Scanned: amavisd-new at nagaokaut.ac.jp
Received: from funfun.nagaokaut.ac.jp ([127.0.0.1])
	by funfun.nagaokaut.ac.jp (funfun.nagaokaut.ac.jp [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id dBXjQYtW00j2 for <poffice@blade.nagaokaut.ac.jp>;
	Fri, 12 Sep 2014 12:00:05 +0900 (JST)
Received: from voscc.nagaokaut.ac.jp (voscc.nagaokaut.ac.jp [133.44.1.100])
	by funfun.nagaokaut.ac.jp (Postfix) with ESMTP id E8C1597A826
	for <poffice@blade.nagaokaut.ac.jp>; Fri, 12 Sep 2014 12:00:05 +0900 (JST)
Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75])
	by voscc.nagaokaut.ac.jp (Postfix) with ESMTP id 345CD952439
	for <poffice@blade.nagaokaut.ac.jp>; Fri, 12 Sep 2014 12:00:04 +0900 (JST)
Received: from [221.186.184.76] (localhost [IPv6:::1])
	by neon.ruby-lang.org (Postfix) with ESMTP id 1F3F7120450;
	Fri, 12 Sep 2014 11:59:56 +0900 (JST)
X-Original-To: ruby-core@ruby-lang.org
Delivered-To: ruby-core@ruby-lang.org
Received: from dcvr.yhbt.net (dcvr.yhbt.net [64.71.152.64])
 by neon.ruby-lang.org (Postfix) with ESMTP id 7FA2112040C
 for <ruby-core@ruby-lang.org>; Fri, 12 Sep 2014 11:59:51 +0900 (JST)
Received: from localhost (dcvr.yhbt.net [127.0.0.1])
 by dcvr.yhbt.net (Postfix) with ESMTP id 284F21FFAF;
 Fri, 12 Sep 2014 02:59:49 +0000 (UTC)
Date: Fri, 12 Sep 2014 02:59:48 +0000
From: Eric Wong <normalperson@yhbt.net>
To: Ruby developers <ruby-core@ruby-lang.org>
Message-ID: <20140912025948.GA6413@dcvr.yhbt.net>
References: <redmine.issue-10232.20140912012732@ruby-lang.org>
 <redmine.issue-10232.20140912012732.0e9e499bf28f46d5@ruby-lang.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <redmine.issue-10232.20140912012732.0e9e499bf28f46d5@ruby-lang.org>
X-ML-Name: ruby-core
X-Mail-Count: 64985
Subject: [ruby-core:64985] Re: [ruby-trunk - Bug #10232] [Open] Trivial
 change of IMMEDIATE VALUE bits layout
X-BeenThere: ruby-core@ruby-lang.org
X-Mailman-Version: 2.1.15
Precedence: list
Reply-To: Ruby developers <ruby-core@ruby-lang.org>
List-Id: Ruby developers <ruby-core.ruby-lang.org>
List-Unsubscribe: <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>, 
 <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe>
List-Post: <mailto:ruby-core@ruby-lang.org>
List-Help: <mailto:ruby-core-request@ruby-lang.org?subject=help>
List-Subscribe: <http://lists.ruby-lang.org/cgi-bin/mailman/listinfo/ruby-core>, 
 <mailto:ruby-core-request@ruby-lang.org?subject=subscribe>
Errors-To: ruby-core-bounces@ruby-lang.org
Sender: "ruby-core" <ruby-core-bounces@ruby-lang.org>

ko1@atdot.net wrote:
> (1) can be incompatibility issue so that I don't propose this fix strongly.
> Interpreter core doesn't depends on this spec, but C-exts can be affected.

I think the only thing I've seen C-exts depend on is Qfalse == 0
(which this preserves)

> Strange thing is: vm1_const

I suspect this is CPU-specific behaviors.  I cannot see the difference
on my AMD FX-8320 (on vm1_const, haven't tested others)