Re: [Flashforth-devel] Floating point math for FF 5.x

[Mikael N. <mik...@fl...>]

A first version that can parse and print floating point is available in 
git. Tested on dspic33fj128gp802. The CFloat.c file s not needed.
FF calls the Microchip FP lib routines directly without any C layer.

It is based on Leon Maurers FP work for Amforth. And on Igor Mokos 
adaptations.

Just send the float.txt
With ff-shell.py it looks like this:

cd ff
sudo shell/ff-shell.py -p /dev/ttyACM0 --xonxoff -s 38400

#send pic24/forth/float.txt

   ok<#,ram>
f# 3.14e-9 f. 0.00000000314000  ok<#,ram>
f# 3.14e-9 fs. 3.14000E-9  ok<#,ram>
f# 3.14e-8 fs. 3.14000E-8  ok<#,ram>

Excerpt from WORDS below:


facos	fasin
fatan	flog10	flog	fexp	fsqrt	ftan	fcos	fsin
fpow	f/	f*	f-	f+

f#	string>float	extract	fs.	fe.	f.	f.no-space	round2prc
precision	emitnzeros	fprintdigits	femitdigit	emitdigit	tkcofsign 
smlrpow10	f10^n
fround	fmod1	ceil	floor	f~	fprep4div	fmin	fmax
f<=	f>=	f>	f<	f2*	f2/	f=	fabs
negateiftrue	fnegateifneg	fnegate	f0<	f0=	f>s	f>d	s>f
d>f	faddtoexponent	f>sigexp	sigexp>f	fshifttoexp	flshiftn	flshift	frshiftn
frshift	fmksgnd	fsetsign	fsetexponent	fsignificand	fsign	fexponent 
frawexponent
dsplit	dnegateifneg	d10*	>=	f0.5	f10	f1	f0
fliteral	fvariable	fconstant	f!	f@	fnover	nfover	fnswap
nfswap	ftuck	fnip	frot	fswap	fover	fdup	fdrop
d>s	0>	-fpmath