[meta-ti] omap3-sgx-modules-5.01.01.xx ONLY supports hardfp mode for now

[Khem Raj]

On Wed, Aug 5, 2015 at 8:41 PM, Ankur Tyagi <ankur.tyagi85 at gmail.com> wrote:
> Thanks for your response.
>
> So it is worth trying with TUNE_FEATURE "hfp" and measure the performance.
> Do I have to set TARGET_FPU as "hfp-neon" as default value is "vfp-neon"
>

all you might need is to select a proper DEFAULTTUNE in machine config
something like

DEFAULTTUNE ?= "cortexa8thf-neon"

> Does it make sense to push this change upstream as well ?
>
> "Knowledge is knowing tomato is a fruit, wisdom is not putting it in a fruit
> salad"
>
> On Thu, Aug 6, 2015 at 3:00 PM, Khem Raj <raj.khem at gmail.com> wrote:
>>
>> On Wed, Aug 5, 2015 at 7:47 PM, Ankur Tyagi <ankur.tyagi85 at gmail.com>
>> wrote:
>> > Hi,
>> >
>> > I am using TI AM335x-EVM kit and while building image using
>> > "arago-daisy-config.txt", I saw this warning :
>> >
>> > omap3-sgx-modules-5.01.01.02 ONLY supports hardfp mode for now
>> > omap3-sgx-modules-5.01.01.01 ONLY supports hardfp mode for now
>> >
>> > and TUNE_FEATUREis "vfp"
>> >
>> > Does that mean GPU is not getting used anymore ?
>>
>> not really, what its telling is that you dont have
>> callconvention-hard in TUNE_FEATURES
>> which means that compiler wont use hardfloat ABI when making function
>> calls.
>> but neon/vfp will still be used e.g. when doing vectorization etc. if
>> using hardfp ABI will radically improve performance totally depends
>> upon kind of workload that you are measuring. It may vary.
>>
>> > I am using QT5 with eglfs platform and need GPU support for performance.
>> >
>> > Please clarify the situation.
>> >
>> > Thanks
>> > Ankur
>> >
>> > --
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>> >
>
>