OpenCL: working with doubles error

0
votes

The error states: error: can't enable all OpenCL extensions or unrecognized OpenCL extension
#pragma OPENCL EXTENSION cl_khr_fp64 : enable

System configuration:

  • Windows 7 on 64 bit
  • Notebook with ATI Mobility Radeon HD 5400 series
  • Visual Studio 2010

Drivers installed:

  • AMD-APP-SDK-v2.8-Windows-64
  • amd_catalyst_13.5_mobility_beta3

How can i solve this problem because i need to use double type in the kernel? The directive is declared in the first kernel line.

1
opencl
You can check the device supported extensions with clGetDeviceInfo(…, CL_DEVICE_EXTENSIONS,…) - Eric Bainville

1 Answers

2
votes

Your GPU doesn't support double precision. This is why the OpenCL runtime is reporting it cannot enable the cl_khr_fp64 extension. If you really need double precision, try using the CPU as an OpenCL device instead and run your kernel on that.