From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15778 invoked by alias); 26 Dec 2007 07:26:05 -0000 Received: (qmail 15769 invoked by uid 22791); 26 Dec 2007 07:26:05 -0000 X-Spam-Check-By: sourceware.org Received: from smtp104.sbc.mail.mud.yahoo.com (HELO smtp104.sbc.mail.mud.yahoo.com) (68.142.198.203) by sourceware.org (qpsmtpd/0.31) with SMTP; Wed, 26 Dec 2007 07:25:55 +0000 Received: (qmail 40302 invoked from network); 26 Dec 2007 07:25:52 -0000 Received: from unknown (HELO ?172.16.1.34?) (timothyprince@sbcglobal.net@69.104.141.173 with plain) by smtp104.sbc.mail.mud.yahoo.com with SMTP; 26 Dec 2007 07:25:52 -0000 X-YMail-OSG: XoLU00wVM1kiDQURzbbK8coJBbYDdvUKuhdWA2IjWVQIHg1i4PjeAyHBuj2C.bMSPgEXjluurdKcd_ZvSHihjgca_HvIG6.dAq5R1iiXx566ixNBiXs- Message-ID: <477201FF.10802@computer.org> Date: Wed, 26 Dec 2007 09:08:00 -0000 From: Tim Prince User-Agent: Thunderbird 2.0.0.9 (Windows/20071031) MIME-Version: 1.0 To: Qing Wei CC: gcc@gcc.gnu.org Subject: Re: How to describe a FMAC insn References: <4771EDE8.9030709@gmail.com> In-Reply-To: <4771EDE8.9030709@gmail.com> Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-owner@gcc.gnu.org X-SW-Source: 2007-12/txt/msg00685.txt.bz2 Qing Wei wrote: > Could someone give some hints of how to describe a FMAC (float mult and > add) insn in machine description, it matches d = b*c+a, which is a four > operands float instrution. There are plenty of examples in ia64.md and rs6000.md.