From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 25966 invoked by alias); 29 Aug 2009 02:07:04 -0000 Received: (qmail 25956 invoked by uid 22791); 29 Aug 2009 02:07:04 -0000 X-SWARE-Spam-Status: No, hits=-2.3 required=5.0 tests=AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from nskntmtas06p.mx.bigpond.com (HELO nskntmtas06p.mx.bigpond.com) (61.9.168.152) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sat, 29 Aug 2009 02:06:59 +0000 Received: from nskntotgx03p.mx.bigpond.com ([121.209.33.16]) by nskntmtas06p.mx.bigpond.com with ESMTP id <20090829020656.JAVO1883.nskntmtas06p.mx.bigpond.com@nskntotgx03p.mx.bigpond.com>; Sat, 29 Aug 2009 02:06:56 +0000 Received: from bubble.grove.modra.org ([121.209.33.16]) by nskntotgx03p.mx.bigpond.com with ESMTP id <20090829020655.EODN13119.nskntotgx03p.mx.bigpond.com@bubble.grove.modra.org>; Sat, 29 Aug 2009 02:06:55 +0000 Received: by bubble.grove.modra.org (Postfix, from userid 1000) id 328DF170C880; Sat, 29 Aug 2009 11:36:55 +0930 (CST) Date: Sat, 29 Aug 2009 09:44:00 -0000 From: Alan Modra To: Peter Bergner Cc: "binutils@sourceware.org" Subject: Re: Handle extrdi and large register rotate values Message-ID: <20090829020655.GL19523@bubble.grove.modra.org> Mail-Followup-To: Peter Bergner , "binutils@sourceware.org" References: <1251412176.5257.51.camel@otta> <20090828001501.GA19523@bubble.grove.modra.org> <20090828003952.GB19523@bubble.grove.modra.org> <1251494962.5257.77.camel@otta> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1251494962.5257.77.camel@otta> User-Agent: Mutt/1.5.17+20080114 (2008-01-14) X-RPD-ScanID: Class unknown; VirusThreatLevel unknown, RefID str=0001.0A150204.4A988D3F.00C6,ss=1,fgs=0 X-SIH-MSG-ID: ohE1E9b+TAD0zmRy0WWwOwRzyFrsq3B48Z4QWs1mqRMGT0XduMfOIJvnY9IElp7k3S5MNBCFOGslZrzmXY/YiA== X-IsSubscribed: yes Mailing-List: contact binutils-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: binutils-owner@sourceware.org X-SW-Source: 2009-08/txt/msg00552.txt.bz2 On Fri, Aug 28, 2009 at 04:29:22PM -0500, Peter Bergner wrote: > On Fri, 2009-08-28 at 10:09 +0930, Alan Modra wrote: > > {"extrdi", 4, PPC64, "rldicl %0,%1,((%2)+(%3))&((%2)+(%3)<>64),64-(%2)"}, > > This wouldn't allow something like: > > extrdi 10,24,6,60 (ie, want [60,61,62,63,0,1] bits) > > which mine would correctly translate to: > > rldicl 10,24,2,58 > > Do we even want to support extrdi's like that or not? If not, I'll whip > up a patch using your patch idea and add some testcases. I'd rather not support wrap around fields in the extended mnemonics. On 64-bit hardware the 32-bit insns have some pitfalls for novice programmers. -- Alan Modra Australia Development Lab, IBM