[Info-vax] New VSI Roadmap (yipee!)

[John Reagan]

On Sunday, March 1, 2015 at 10:07:48 AM UTC-5, Stephen Hoffman wrote:
> On 2015-03-01 04:33:55 +0000, John Reagan said:

> > Rounding floating point to certain number of decimal places?  That 
> > doesn't make sense.  Floating numbers are exact.  1.23 isn't really 
> > 1.23 but something close to it.  I don't know what a float-to-float 
> > rounding does?
> 
> Z = 1.2345678
> Z = FRound( Z, 2%)
> Z = 1.23
> Z = 1.2378
> Z = FRound( Z, 2%)
> Z = 1.24
> 

I know.  You want to throw away fractions of a penny or pick up fractions of a penny.  If you want to "create" money, go mine for Bitcoin.

The reality is that the routine overhead is small compared to the floating/integer operations involved.  There is no simple instruction sequence to do that (since it isn't something people do with normal floating point data), it will always be slow.  I would think that GEM would inline that routine if it was defined in the same module.