OpenCL set and clear bit of unsigned long long number in kernel -

i use follow code set , clear bit of unsigned long long in kernel void in opencl

a1 |= 1ll << 2 * i;  // = 9 , set bit 18 =1, a1 long long int a1 &= ~(1ll << 2 * + 1); //clear bit 19 = 0

my code run in cuda, in opencl, has error cl_out_of_host_memory in buildprogram. if use

a1 |= 1 << 2 * i;  // = 9 , set bit 18 =1, a1 long long int a1 &= ~(1 << 2 * + 1); //clear bit 19 = 0

it run fine result wrong because can't set bit of long long number. can me!

the data type long long reserved keyword future extensions in opencl 2.0 (and in 2.1 too). cannot use it, there no implementation possible.

Fun enginering