ArcEye

**Comment by [luminize](https://github.com/luminize)** _Sat May 21 10:18:47 2016_ ---- @mhaberler does this https://github.com/machinekit/machinekit/issues/687 and these https://github.com/machinekit/machinekit/pull/941 be pave the way for writing a proper testcase?

**Comment by [mhaberler](https://github.com/mhaberler)** _Tue Aug 16 10:07:55 2016_ ---- I think @strahlex imported this code

**Comment by [mhaberler](https://github.com/mhaberler)** _Wed Aug 17 17:30:58 2016_ ---- @strahlex : I cannot even find any reference from where this code originated - could you help reverse-engineer/document the whereabouts? the...

**Comment by [mbuesch](https://github.com/mbuesch)** _Wed Aug 17 17:36:13 2016_ ---- It seems to originate from an ancient BSD codebase http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libm/src/e_asin.c

**Comment by [mhaberler](https://github.com/mhaberler)** _Wed Aug 17 18:26:34 2016_ ---- there seem to be all sorts of variations of this file, and different attempts at patching this up: https://android.googlesource.com/platform/bionic/+/7581f9c/libm/upstream-freebsd/lib/msun/src/e_asin.c http://www.scs.stanford.edu/histar/src/pkg/uclibc/libm/e_asin.c https://bugzilla.mozilla.org/show_bug.cgi?id=933257...

**Comment by [mbuesch](https://github.com/mbuesch)** _Wed Aug 17 20:13:32 2016_ ---- Why is this needed anyway? Can't we replace it by something sane?

**Comment by [mhaberler](https://github.com/mhaberler)** _Thu Aug 18 20:44:14 2016_ ---- absolutely - need to find a trustable source first ;)

**Comment by [machinekoder](https://github.com/machinekoder)** _Fri Aug 19 18:06:50 2016_ ---- It's part of the `libm` source code and yes it is absolutely crazy code. If you have a better working version...

**Comment by [machinekoder](https://github.com/machinekoder)** _Fri Aug 19 18:08:15 2016_ ---- See also https://github.com/machinekit/machinekit/issues/629

**Comment by [ArcEye](https://github.com/ArcEye)** _Thu Jan 25 10:49:14 2018_ ---- Linuxcnc have done a bit on smart serial recently plus some other fixes https://github.com/LinuxCNC/linuxcnc/commits/master/src/hal/drivers/mesa-hostmot2 Will need to check that all changes...