[Coco] long math subroutine module?

[Aaron Banerjee]

I wrote a "print" routine for "ultra-high precision" floats (assumes  
that it is 1.x where "x" has 32 bits of precision).  It was for a  
special purpose program and I don't know if it would be of any use,  
but if you think it is, I'll send it.  It will provide a decimal print  
of the number...
             - Aaron

On Apr 11, 2012, at 11:31 PM, gene heskett wrote:


> On Wednesday, April 11, 2012 11:25:16 PM Willard Goosey did opine:

>

>> Has anyone written a long (32-bit) integer math subroutine module for

>> BASIC-09?  I'm thinking something that uses a record of 2 integers

>> (like some of the syscalls want) for each argument.  Something  

>> like...

>>

>> arg1.hi=1

>> arg1.lo=63000

>> arg2.hi=0

>> arg2.lo=2

>> run longmath("*",arg1,arg2,arg3)

>> (*result in arg3*)

>>

>> ?????

>> Willard

>

> So far as I have heard about, no.  I believe the real problem is the  

> size

> of an int in basic09 is 16 bits & even a real is only 5 bytes  

> including the

> exponent.

>

> I believe if you need that in long or double, you'll need to write  

> it in C

> and use the trig.l to get those functions where the accuracy only gets

> fuzzy about 16 or 17 digits out.  They work well until the julian  

> calender

> hits zero in the middle of 4713 BC.

>

> Cheers, Gene

> -- 

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