Re: [microblaze-uclinux] ucLinux with Microblaze 4.0

[John McGrath <john.mcgrath@xxxxxxxxxx>]

Hi All,
Just a question - the new version 4.0 supports a dedicated FPU for 
microblaze. Does anyone know if uClinux will see any performance 
improvement with this - My hunch is that there is little requirement for 
an OS to use floating point - and most likely it's avoided at all costs 
where possible, but does anyone know?
I guess it will become evident once the 7.1 toolchain is up and running!

Cheers,
John

John Williams wrote:

> Hi David,
>
> David Banas wrote:
>
>>> Note I'm still building the kernel with the custom toolchain (based on
>>> EDK6.3) - am still trying to resolve some issues I'm seeing with the
>>> mb-gcc in 7.1
>>
>>
>> Perhaps, that's the difference; I'm using EDK 7.1, SP1 now.
>
>
> To clarify - I built the hardware with EDK7.1, but compiled the kernel 
> and apps with mb-gcc based EDK6.3 (the custom toolchain distributed on 
> the website).
>
> mb-gcc in EDK6.x is gcc v2.95 - in EDK7.1 it's gcc-3.4.x .  This is 
> quite a significant change.   Traffic on uClinux-dev list indicates a 
> few arches experiencing issues with gcc-3.4.x, so I don't think it's 
> just us.
>
> I hope to have a fix for the EDK7.1 mb-gcc soon - will let you know.  
> In the meantime, I've found no problems building HW with 7.1, and 
> compiling kernels with older mb-gcc.  once you get your tools 
> installed and path configured, it's invisible anyway.
>
> Cheers,
>
> John
>
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>
>

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/ /\/  John McGrath
\ \    Xilinx Inc.           
       Mixed Signal IC Design Engineer
\_\/\                        
                   
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                X I L I N X  I N C.                       
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