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  1. Thread: What is a uint4?

    by m4rkw
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    6,592

    Re: What is a uint4?

    And what if I'm doing a different operation on all four vector elements? No performance benefit?
  2. Thread: What is a uint4?

    by m4rkw
    Replies
    8
    Views
    6,592

    Re: What is a uint4?

    Okay, so do you get a speed benefit from simply switching data types or do you have to use them in a certain way?

    For example, supposing I have some code which declares four integers, then loops...
  3. Thread: What is a uint4?

    by m4rkw
    Replies
    8
    Views
    6,592

    Re: What is a uint4?

    Okay thanks so those are 4-byte ints?
  4. Re: Abysmal performance on HD4870 / Snow Leopard.. why?

    I've made some progress with optimising this, still needs a lot of work though. I need to understand what uint4's are before I can get much further (see other post I just made).
  5. Thread: What is a uint4?

    by m4rkw
    Replies
    8
    Views
    6,592

    What is a uint4?

    Hi,

    I'm somewhat confused by the uint4/float4 data type. I was told previously to use uint4's for extra speed when coding OpenCL kernels for my HD4870 GPU, but there seems to be a little...
  6. Thread: Error code -54

    by m4rkw
    Replies
    3
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    3,166

    Re: Error code -54

    See: http://www.khronos.org/opencl/sdk/1.0/d ... ernel.html

    Compare your err with the errors listed there to find out which one it is.
  7. Abysmal performance on HD4870 / Snow Leopard.. why?

    Hi all,

    I've written a basic SHA1 hash brute-forcer for OpenCL. Unfortunately the performance is way below what I was anticipating. Tens of millions of hashes per second should be typical for a...
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