Date: Thu, 1 Oct 2015 12:24:26 +0300 From: Stefan Parvu <sparvu@kronometrix.org> To: Andrew Turner <andrew@fubar.geek.nz> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: compile kernel with hard float support Message-ID: <560CFBCA.5010001@kronometrix.org> In-Reply-To: <20151001101825.44341b74@bender> References: <560CF28F.4000908@kronometrix.org> <20151001101825.44341b74@bender>
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> No, armv6 is built with softfp. This means the compiler is free to use > the VFP, but when passing floating-point data between functions it > needs to copy this to the general-purpose registers. > > Even without this the helper functions detect the presence of the VFP > unit and make use of this when available. right. Got it. Thanks for explanation. > The kernel doesn't use any floating-point hardware, other than to > enable and disable it in the VFP driver. As such it doesn't matter if > you've built the kernel for hard-float or not, it will make no > difference to the code generated. ok, I see. Ok this probable wont make any difference to my case. Right. 10 x thanks. -- Stefan Parvu <sparvu@kronometrix.org>
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