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VPf vector example

Etienne SOBOLE
Note: This was originally posted on 5th January 2011 at http://forums.arm.com

Hi.

the cortex documentation speak about register bank for vector usage.
That's great, but I do not really understand what is a vector instruction (using those bank)

Does anybody can give me an example using the register bank and vpf vector instruction ?

Thank's
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  • Note: This was originally posted on 7th January 2011 at http://forums.arm.com


    That is the older, deprecated "VFP vector" or "short vector" mode.  It's not supported (in hardware) on the Cortex-A nor Cortex-R processors (as far as I know).



    I'm agree with you.
    But this is the only usage I found for the bank register.

    NEON do not use the bank registrer.
    Most of NEON instruction can use all NEON registrer without any restriction.

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  • Note: This was originally posted on 7th January 2011 at http://forums.arm.com


    That is the older, deprecated "VFP vector" or "short vector" mode.  It's not supported (in hardware) on the Cortex-A nor Cortex-R processors (as far as I know).



    I'm agree with you.
    But this is the only usage I found for the bank register.

    NEON do not use the bank registrer.
    Most of NEON instruction can use all NEON registrer without any restriction.

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