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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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  • 0
    Note: This was originally posted on 16th May 2011 at http://forums.arm.com

    All is describe here
    http://pulsar.webshaker.net/2011/05/15/program-to-count-the-cycles-of-the-a8-cortex-v0-7/

    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]a.1-0 1c[/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]
    [/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]neam:[/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]a: it's an ARM instruction (opposite to NEON or VPf instruction)[/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]1: running cycle[/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]0: pipeline 0[/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]1c: the instruction take 1 cycle to execute.[/size][/font][/color]
Reply
  • 0
    Note: This was originally posted on 16th May 2011 at http://forums.arm.com

    All is describe here
    http://pulsar.webshaker.net/2011/05/15/program-to-count-the-cycles-of-the-a8-cortex-v0-7/

    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]a.1-0 1c[/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]
    [/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]neam:[/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]a: it's an ARM instruction (opposite to NEON or VPf instruction)[/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]1: running cycle[/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]0: pipeline 0[/size][/font][/color]
    [color=#222222][font=Arial, Verdana, Tahoma, sans-serif][size=2]1c: the instruction take 1 cycle to execute.[/size][/font][/color]
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