Date: Fri, 25 Jan 2008 09:09:00 -0800 From: Peter Grehan <grehan@freebsd.org> To: "M. Warner Losh" <imp@bsdimp.com> Cc: yanegomi@gmail.com, perforce@FreeBSD.org, marcel@FreeBSD.org Subject: Re: PERFORCE change 133911 for review Message-ID: <479A17AC.4070004@freebsd.org> In-Reply-To: <20080125.100006.-262784007.imp@bsdimp.com> References: <200801230414.m0N4E4ng009323@repoman.freebsd.org> <4797C8E0.4070100@freebsd.org> <4798C436.6090904@gmail.com> <20080125.100006.-262784007.imp@bsdimp.com>
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> I'd rather hoped to run the Cisco stuff using EABI, which doesn't need > fp emulation in the kernel... EABI to my mind only helps in ultra-tight embedded environments, which I don't think exist anymore. 8-byte vs 16-byte stack alignment isn't going to help anyone. And if embedded environments are using a lot of soft-float, they are running on the wrong type of CPU. Trapping to the kernel should be infrequent, and it does allow a single ABI for all processor types. GCC will generate floating point instructions for data copying in contrived situations, but there are none in base FreeBSD/ppc. My $0.02 .. later, Peter.
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