FastIEEESinglePrecNaturalLogAbs; Just arctanh Taylor@1. Was 5X fastr'n mid00s x87. On SkyLake/glibc2.40/gcc14 ~1.2-2X faster; ARM64glibc somehow(fastHW?) ~4X faster. Unsure about Win/OSX. See news.ycombinator.com/item?id=40758562
func lna(x: float32): float32 {.inline, ...raises: [], tags: [], forbids: [].}