Note about branchless or abs-based mathx.sign

2024-11-22 14:14:36 +00:00 · 2021-06-29 14:44:09 +10:00 · 2021-06-29 14:44:09 +10:00 · a2c7800290
commit a2c7800290
parent fe135c533b
1 changed files with 1 additions and 0 deletions
--- a/mathx.lua
+++ b/mathx.lua
@ -46,6 +46,7 @@ function mathx.to_precision(v, decimal_points)
 end

 --0, 1, -1 sign of a scalar
+--todo: investigate if a branchless or `/abs` approach is faster in general case
 function mathx.sign(v)
 	if v < 0 then return -1 end
 	if v > 0 then return 1 end