Haswell GPU: OpenCL and fp64 support

Discussion in 'GPGPU Technology & Programming' started by codedivine, Jun 1, 2013.

  1. codedivine

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    I wasn't really sure which thread to post this in. Does anyone have info about FP64 support in Haswell GPU SKUs? Ivy Bridge did not support fp64 in OpenCL, but supported fp64 add and mul in DirectCompute. Has the situation changed?

    If you have a Haswell part, can you post info about the supported OpenCL extensions? You can use a tool like "GPU Caps Viewer" from Geeks3D. Select OpenCL tab, select GPU device, and select more information.
     
  2. moozoo

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  3. codedivine

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  4. Davros

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    whats the difference between
    cl_khr_fp64 and cl_amd_fp64
     
  5. Dade

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    cl_amd_fp64 is a subset (i.e. include basic math operations and not much more) of cl_khr_fp64; it was introduced by AMD in order to run OpenCL double precision code on some old GPU missing the hardware support for a complete cl_khr_fp64 implementation.
     
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