cl_khr_fp64 - Provided for backward compatibility if double floating-point
precision is supported.
|#pragma OPENCL EXTENSION cl_khr_fp64 : enable
The 64-bit double scalar and corresponding vector types are optional types that
are supported if CL_DEVICE_DOUBLE_FP_CONFIG in the table of allowed
values for param_name for clGetDeviceInfo(3clc) for a device is
The double data type must confirm to the IEEE-754 double precision
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- OpenCL Specification
page 46, section 4.2 - Querying Devices