On Thursday, 24 November 2016 at 10:41:44 UTC, Kagamin wrote:
On Thursday, 24 November 2016 at 10:16:11 UTC, John Colvin
wrote:
I was talking about andrei's example. He has a cast(int) in it
before the division.
And you think that compilation of cast(int)a.length/2 to 3
instructions is optimized just fine? How is it better that one
shift?
Because it's correct. If a.length is larger than int.max then
cast(int)a.length will half the time be negative and therefore a
simple rightshift would not be equivalent to division by 2.
