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Cortex A8 Instruction Cycle Timing

barney vardanyan
Note: This was originally posted on 17th March 2011 at http://forums.arm.com

Hi) sorry for bad English

I need to count latency for two instruction, and all I have is the arm cortex A 8 documantation(charter 16) !
but I have no idea how can do this work using that documantation(
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    Note: This was originally posted on 8th July 2011 at http://forums.arm.com

    Hi Etienne. Have a good day

    So far, I found some instructions that your cycle count module can't analyze. I don't know why.
    Please check and give me some explanations:

    vbic.i16 d0, #1 ; 0x0001
    vbic.i32 q2, #1 ; 0x00000001

    vmov.i16 q0, #1 ; 0x0001
    vmov.i16 d0, #1 ; 0x0001

    vmvn.i16 q1, #1 ; 0x0001
    vmvn.i16 d1, #1 ; 0x0001

    vorr.i16 q0, #1 ; 0x0001
    vorr.i16 d0, #1 ; 0x0001

    Dung
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  • 0
    Note: This was originally posted on 8th July 2011 at http://forums.arm.com

    Hi Etienne. Have a good day

    So far, I found some instructions that your cycle count module can't analyze. I don't know why.
    Please check and give me some explanations:

    vbic.i16 d0, #1 ; 0x0001
    vbic.i32 q2, #1 ; 0x00000001

    vmov.i16 q0, #1 ; 0x0001
    vmov.i16 d0, #1 ; 0x0001

    vmvn.i16 q1, #1 ; 0x0001
    vmvn.i16 d1, #1 ; 0x0001

    vorr.i16 q0, #1 ; 0x0001
    vorr.i16 d0, #1 ; 0x0001

    Dung
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