Re: [Fwd: Activity Day June 10th - ARMv7 F15 hardfp bringup]

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On 06/05/2011 12:23 PM, Peter Robinson wrote:
> On Sun, Jun 5, 2011 at 12:18 PM, Gordan Bobic<gordan@xxxxxxxxxx>  wrote:
>> On 06/05/2011 02:10 AM, Chris Tyler wrote:
>>> On Sat, 2011-06-04 at 20:53 -0400, Jon Masters wrote:
>>>> [0] We're making a "one time" incompatible ABI switch in F-15 bringup to
>>>> the "hard float" ABI defined in section 6 of the ARM AAPCS (commonly
>>>> referred to as the ARM EABI - but that doesn't actually exist as a
>>>> name). The procedure call standard will be ARM AAPCS vfpv3-d16, as
>>>> defined in section 6 of that document. Other distros are switching and
>>>> this will form the basis of any LSB standardization effort later on.
>>>> Think of v7 and v5 as being different arches, which they are really.
>>>
>>> And to further clarify:
>>>
>>> - This is an addition, not a switch -- the intention is to continue to
>>> support armv5tel in addition to armv7hl at this time -- Tegra and
>>> Marvell Kirkwood (including plug computer) devices which do not support
>>> armv7hl will continue to work with armv5tel.
>>>
>>> - The significant incompatibility is hardfp vs. softfp ABI (moreso than
>>> v7 vs. v5).
>>
>> So would it not be more sensible to make the distro ARMv7 without NEON?
>
> There's no mention of NEON above. Where do you get that idea from?

Chris said that Tegra wouldn't be supported on armv7hl but would 
continue to work on armv5tel. The only reason why Tegra wouldn't work 
with the armv7 port would be due to it's lack of NEON instructions, 
since it is an armv7 processor. It was implied rather than explicit.

Gordan
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