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int ifloor(fixed x)
Rounds x down and returns the result as an integer.
See the article on Rounding for all rounding modes.
ifloor(2.3) -> 2 ifloor(3.8) -> 3 ifloor(5.5) -> 5 ifloor(-2.3) -> -3 ifloor(-3.8) -> -4 ifloor(-5.5) -> -6