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by nwellnhof
1288 days ago
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For signed ints, try (x >> 1) + (y >> 1) + (x & y & 1)
This rounds toward negative infinity. Also (x >> 1) + (y >> 1) + ((x | y) & 1) // Rounds toward +Inf
(x >> 1) + (y >> 1) + (x & 1) // Rounds up if x is odd
(x >> 1) + (y >> 1) + (y & 1) // Rounds up if y is odd
I'd be curious if there's a bit-twiddling trick for rounding toward x or y. |
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