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oscarbarenys1
Adept II

AMD OpenCL on Snow Leo questions

Hi,

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
Extensions:

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

  cl_khr_byte_addressable_store

are memory not byte addresable?

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2 Replies

The extensions reported by the runtime are the extensions that are supported.
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Hi oscarbarenys1,

The implementation of OpenCL that is part of Snow Leopard is provided by Apple. As such, we cannot comment on the features that are being exposed by that implementation.

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