Kernel Vectorization

Thanks okebz ,

So , if my write as follows , is it the same things ?

===========================================

void tempA( ...) {...};

void tempB( ...) {...};

void processing(global int *a , int *b){

if(a == 0)

tempA( a ,b);

else

tempB( a ,b);

}

__attribute__((num_simd_work_items(2)))

__attribute__((reqd_work_group_size(256,1,1)))

kernel void test (__global int * a ) // NDR

{

int gid = get_gloabla_gid(0);

int b ;

while ( b ==0 )

processing(&a[gid] , &b );

}

=================================

But if my program flow is as previously said , how to optimize this code ?

Each workitem stays in while loop until condition is matched.

Is it better to use task instead of NDR ?

Regards .,