From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH 2/8] arch: Refactor BR2_SOFT_FLOAT into per-architecture options
Date: Mon, 8 Jul 2013 16:02:04 +0200 [thread overview]
Message-ID: <20130708160204.6b7b96f8@skate> (raw)
In-Reply-To: <87vc4mglui.fsf@dell.be.48ers.dk>
Dear Peter Korsgaard,
On Sun, 07 Jul 2013 22:24:05 +0200, Peter Korsgaard wrote:
> Does avr32 SoCs with hard float even exist? Does
> uClibc/kernel/.. support it? If not, we could just make this a hidden
> option.
According to http://en.wikipedia.org/wiki/AVR32, the AVR32 AP7 never
had a floating point unit, only the UC3, but I believe Linux was only
running on AP7 cores, but I'm not sure. Anyway, I'll make AVR32
soft-float only.
> Thomas> +config BR2_POWERPC_SOFT_FLOAT
> Thomas> + bool "Use soft-float"
> Thomas> + default y
> Thomas> + select BR2_SOFT_FLOAT
> Thomas> + help
> Thomas> + If your target CPU does not have a Floating Point Unit (FPU)
> Thomas> + or a kernel FPU emulator, but you still wish to support
> Thomas> + floating point functions, then everything will need to be
> Thomas> + compiled with soft floating point support (-msoft-float).
>
> We didn't use to default to soft float for powerpc, as most cores have a
> FPU.
Correct, will fix. As a followup to this patch set, it'd be nice if
someone knowledgeable in PPC stuff did a similar handling of FPU stuff.
Thanks,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2013-07-08 14:02 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-06 15:08 [Buildroot] [PATCH 0/8] ARM floating point improvements and EABIhf support Thomas Petazzoni
2013-07-06 15:08 ` [Buildroot] [PATCH 1/8] arch: introduce BR2_GCC_TARGET_{FPU, FLOAT} Thomas Petazzoni
2013-07-06 15:08 ` [Buildroot] [PATCH 2/8] arch: Refactor BR2_SOFT_FLOAT into per-architecture options Thomas Petazzoni
2013-07-07 20:24 ` Peter Korsgaard
2013-07-08 14:02 ` Thomas Petazzoni [this message]
2013-07-06 15:08 ` [Buildroot] [PATCH 3/8] arch: improve ARM floating point support and add support for EABIhf Thomas Petazzoni
2013-07-07 20:44 ` Peter Korsgaard
2013-07-08 14:05 ` Thomas Petazzoni
2013-07-06 15:08 ` [Buildroot] [PATCH 4/8] binutils: exclude binutils versions that don't support EABIhf Thomas Petazzoni
2013-07-06 15:08 ` [Buildroot] [PATCH 5/8] gcc: take into account ARM floating point capabilities Thomas Petazzoni
2013-07-06 15:08 ` [Buildroot] [PATCH 6/8] toolchain: remove the old BR2_VFP_FLOAT option Thomas Petazzoni
2013-07-06 15:08 ` [Buildroot] [PATCH 7/8] configs: update defconfigs after VFP option changes Thomas Petazzoni
2013-07-06 15:08 ` [Buildroot] [PATCH 8/8] toolchain-external: update config options after EABIhf introduction Thomas Petazzoni
2013-07-07 20:45 ` [Buildroot] [PATCH 0/8] ARM floating point improvements and EABIhf support Peter Korsgaard
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