Comments (4)
Can I jsut use a wrapping_shr on the usize value or will this differ from the intended semantics?
from rustfish.
Looks like usize
has less than 64 bits on your platform. The intention is to do the shift first in u64
, then cast to usize:
(u64::wrapping_mul(
(occupied & ROOK_MAGICS.masks[s.0 as usize]).0,
ROOK_MAGICS.magics[s.0 as usize]
) >> (64-12)) as usize
from rustfish.
Yes, this looks like a bug, and @niklasf 's fix seems correct.
from rustfish.
Thank you both! I have forked the repo and created a pull request.
from rustfish.
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