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vote

def vote[ret_type: DType](val: Bool) -> Scalar[ret_type]

Creates a 32 or 64 bit mask among all threads in the warp, where each bit is set to 1 if the corresponding thread voted True, and 0 otherwise.

This function takes a boolean value which represents the corresponding threads vote.

NVIDIA supports 32-bit masks; AMD supports 32- and 64-bit masks; Apple Silicon (a 32-lane SIMD-group) supports 32-bit masks, and also accepts a DType.uint64 return whose upper 32 bits are always zero.

Parameters:

  • ​ret_type (DType): Return type for the mask (must be DType.uint32 or DType.uint64).

Args:

  • ​val (Bool): The boolean vote.

Returns:

Scalar[ret_type]: A mask containing the vote of all threads in the warp.

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