CL_DEVICE_PREFERRED_VECTOR_WIDTH_HALF  259 3rdparty/include/opencl/1.2/CL/cl.h #define CL_DEVICE_PREFERRED_VECTOR_WIDTH_HALF       0x1034
CL_DEVICE_PREFERRED_VECTOR_WIDTH_HALF  429 modules/core/src/ocl.cpp #define CL_DEVICE_PREFERRED_VECTOR_WIDTH_HALF       0x1034