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Note about branchless or abs-based mathx.sign

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Max Cahill 2021-06-29 14:44:09 +10:00
parent fe135c533b
commit a2c7800290
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mathx.lua
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@ -46,6 +46,7 @@ function mathx.to_precision(v, decimal_points)
end end
--0, 1, -1 sign of a scalar --0, 1, -1 sign of a scalar
--todo: investigate if a branchless or `/abs` approach is faster in general case
function mathx.sign(v) function mathx.sign(v)
if v < 0 then return -1 end if v < 0 then return -1 end
if v > 0 then return 1 end if v > 0 then return 1 end