pub unsafe extern "C" fn cuda_extend_radix_with_sign_msb_64(
streams: CudaStreamsFFI,
output: *mut CudaRadixCiphertextFFI,
input: *const CudaRadixCiphertextFFI,
mem_ptr: *mut i8,
num_additional_blocks: u32,
bsks: *const *mut c_void,
ksks: *const *mut c_void,
)