From owner-cvs-src@FreeBSD.ORG  Sun Feb 24 07:02:50 2008
Return-Path: <owner-cvs-src@FreeBSD.ORG>
Delivered-To: cvs-src@FreeBSD.ORG
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 6864916A401;
	Sun, 24 Feb 2008 07:02:50 +0000 (UTC) (envelope-from das@FreeBSD.ORG)
Received: from zim.MIT.EDU (ZIM.MIT.EDU [18.95.3.101])
	by mx1.freebsd.org (Postfix) with ESMTP id 4652413C461;
	Sun, 24 Feb 2008 07:02:50 +0000 (UTC) (envelope-from das@FreeBSD.ORG)
Received: from zim.MIT.EDU (localhost [127.0.0.1])
	by zim.MIT.EDU (8.14.2/8.14.2) with ESMTP id m1O6cajQ042834;
	Sun, 24 Feb 2008 01:38:36 -0500 (EST) (envelope-from das@FreeBSD.ORG)
Received: (from das@localhost)
	by zim.MIT.EDU (8.14.2/8.14.2/Submit) id m1O6cane042833;
	Sun, 24 Feb 2008 01:38:36 -0500 (EST) (envelope-from das@FreeBSD.ORG)
Date: Sun, 24 Feb 2008 01:38:36 -0500
From: David Schultz <das@FreeBSD.ORG>
To: Marcel Moolenaar <marcel@FreeBSD.ORG>
Message-ID: <20080224063836.GB42714@zim.MIT.EDU>
Mail-Followup-To: Marcel Moolenaar <marcel@FreeBSD.ORG>,
	src-committers@FreeBSD.ORG, cvs-src@FreeBSD.ORG,
	cvs-all@FreeBSD.ORG
References: <200802232005.m1NK5R60022761@repoman.freebsd.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200802232005.m1NK5R60022761@repoman.freebsd.org>
Cc: cvs-src@FreeBSD.ORG, src-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject: Re: cvs commit: src/sys/powerpc/fpu fpu_add.c fpu_arith.h
	fpu_compare.c fpu_div.c fpu_emu.c fpu_emu.h fpu_explode.c
	fpu_extern.h fpu_implode.c fpu_instr.h fpu_mul.c fpu_sqrt.c
	fpu_subr.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 24 Feb 2008 07:02:50 -0000

On Sat, Feb 23, 2008, Marcel Moolenaar wrote:
> marcel      2008-02-23 20:05:27 UTC
> 
>   FreeBSD src repository
> 
>   Added files:
>     sys/powerpc/fpu      fpu_add.c fpu_arith.h fpu_compare.c 
>                          fpu_div.c fpu_emu.c fpu_emu.h 
>                          fpu_explode.c fpu_extern.h fpu_implode.c 
>                          fpu_instr.h fpu_mul.c fpu_sqrt.c 
>                          fpu_subr.c 
>   Log:
>   Add a floating-point emulator so that a single userland or single ABI
>   can run on processors that don't have a FPU. This is typically the
>   case for Book E processors. While a tuned system will probably want
>   to use soft-float (or use a processor that has a FPU if the usage is
>   FP intensive enough), allowing hard-float on FPU-less systems gives
>   great portability and flexibility.
>   
>   Obtained from: NetBSD

It looks like everything except for fpu_emu.? and fpu_instr.h is
pretty generic, and surely there are other architectures (e.g.,
ARM, low-power 486-SX clones) that could use in-kernel FP emulation.
Do you think it's worthwhile to separate the MI bits and put them
somewhere other than sys/powerpc, or is the plan to burn that
bridge when we get to it?