Enable extension to remove restrictions on byte-addressable stores.

#pragma OPENCL EXTENSION cl_khr_byte_addressable_store : enable


The OpenCL extension cl_khr_byte_addressable_store removes certain restrictions on built-in types char, uchar, char2, uchar2, short, and half. An application that wants to be able to write to elements of a pointer (or struct) that are of type char, uchar, char2, uchar2, short, ushort, and half will need to include the #pragma OPENCL EXTENSION cl_khr_byte_addressable_store : enable directive before any code that performs writes that may not be supported.


In this example the last two lines will compile and work correctly if the cl_khr_byte_addressable_store extension is supported.

__kernel void do_proc (__global char *pA, short b, __global short *pB) { char x[100]; __private char *px = x; int id = (int)get_global_id(0); short f; f = pB[id] + b; px[1] = pA[1]; // no longer an error. pB[id] = b; // no longer an error. }


OpenCL Specification

Also see


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