2 Replies Latest reply on Aug 28, 2009 4:24 PM by michael.chu

    AMD OpenCL on Snow Leo questions



      since its released suppose someone at AMD can answer this:

      I have questions regarding OpenCL in a 4850 in Snow Leopard..

      1. Has it doubles support? cl_khr_double

      2. Has OpenGL interop? cl_apple_gl_sharing..

      3. Return kernel binaries (in AMD IL)

      Assuming some are negative are they going to be supported later via SO updates.. or will stay as of  now..


      Also I have seen some info that return:

      Name: Radeon HD 4870
      Vendor: AMD
      Type: GPU
      Device Version: OpenCL 1.0
      Driver Version: 1.0
      Compute Units: 4
      Work Group Size: 1024
      Clock: 1000 MHz
      Global Memory: 128 MB
      Local Memory: 16384 KB
      Cache Size: 0 KB
      Cache Line Size: 128 Bytes
      Available: Yes
      Double-Precision: No

      Why Compute Units: 4 are not 800 shaders or 160 vector units..

      why no extensions?..


      atomic are not supposedly supported on hardware (cl_khr_global_int32_base_atomics,cl_khr_global_int32_extendde_atomics)

      Also what about


      are memory not byte addresable?