Re: [cc65] Re: floating point support redux

On Tue, Apr 27, 2010 at 11:18:57PM +0200, Ullrich von Bassewitz wrote:
> > every floating point format must be supported by both the target AND the host
> > (the compiler), so while using the kernal float routines for cbm targets might
> > sound like a good idea at first, it also means writing (and maintaining) a
> > floating point implementation with the exact same properties on the host. now
> > multiply that with the number of targets. its much easier to write one
> > emulator that can deal with the format used on all hosts.
> 
> Correct. And: There are platforms that don't have floating point in ROM. For
> these platforms a 6502 floating point library has to be written anyway. So
> using ROM routines won't even save this work.

Also what's up if someone want to use all-RAM memory model (like on C64) and
program compiled with cc65 needs in-ROM floating point routines?  It can be
understood and realized easily that I/O routines can require ROM to be paged
in, but it can be "odd" that even a simple usage of a float needs memory
mapping, so this whole floating point support must be handled with care, I
think.
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