How to treat 64-bit words on a CUDA device?
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Published on 2010-06-16T11:02:30Z
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2010/06/17
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Hi, I'd like to handle directly 64-bit words on the CUDA platform (eg. uint64_t vars). I understand, however, that addressing space, registers and the SP architecture are all 32-bit based.
I actually found this to work correctly (on my CUDA cc1.1 card):
__global__ void test64Kernel( uint64_t *word )
{
(*word) <<= 56;
}
but I don't know, for example, how this affects registers usage and the operations per clock cycle count.
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