Free42 with IEEE 754-2008 decimal floating-point -- interested in a sneak preview?

[Werner]

(03-15-2014 11:54 PM)Thomas Okken Wrote:  I just uploaded version 1.5.1. It has these improvements:

* exact asin(1), acos(0), etc., in DEG and GRAD modes
* it no longer shows negative zeroes
* Windows version: it supports running off a USB stick with a file named "portable" in the executable's directory

I think that covers everything that's come up in this thread.

Thanks Thomas.
BUT
in DEG mode:
SIN(180°+x) = -SIN(x) fails for x=10^-31, 10^-30, 10^-16 ... and many more (these fail on the WP34 as well btw)
UPDATE (Free42, but not WP34): this is probably due to 1e-31 - 10^-31 not being zero.. in fact 10^x does not produce the correct result for x= integer; even -1..)
SIN(45°) ^= COS(45°)
I can't find the range reduction code straight away, to see what would be wrong with it.. can you point me to it?
Cheers, Werner