Register array with numba cuda

Question

In a numba cuda kernel, I know that we can define local and shared arrays. Also the all the variable assignments in a kernel go to the registers for a particular thread. Is it possible to declare a register array using numba cuda? Something similar to the following which would be used in CUDA C kernel?

register float accumulators[32];

That wouldn't do what you suggest in CUDA C and there isn't a way to do it in Numba either — talonmies

Unknown Unknown · Accepted Answer · 2019-05-12T22:46:20

It is not possible.

The register keyword is only a hint to the compiler, and it has essentially no effect in CUDA C/C++. The device code compiler will make decisions about what to put in registers based on its heuristics to generate fast code, not this instruction from the programmer.

Register array with numba cuda

1 Answers