standard functions in OpenCL

memset in OpenCL

커널에서도 memset이된다!

memset(dst_ptr, value, size);

printf in OpenCL

Intel 에선 그냥 쓰면된다.

AMD에선 

#pragma OPENCL EXTENSION cl_amd_printf : enable

Calling clFinish on a command queue flushes all pending output by printf in previously enqueued and completed commands to the implementation-defined output stream.

근데 잘안되네;