Re: question - recycling GPR variables
Samuel Tardieu <[email protected]> 19 Nov 2004 22:21:30 +0100
| Newsgroups | gmane.comp.lang.forth.picforth |
|---|---|
| Organization | Avian Carrier & Friends |
| Message-ID | <[email protected]> |
>>>>> "David" == David McNab <[email protected]> writes: David> With other HLLs such as C, the compiler avoids a data stack David> altogether, and allocates cells in absolute GPR locations David> instead. It then uses heuristics to analyse the call tree and David> recycle these GPRs wherever possible. Interesting. Do they also properly handle interrupts? Is multitasking supported then? Does that play well with dynamic calls? David> Is there anything like this in PicForth? I'm trying to conserve David> data memory, and would prefer not to have 9 GPRs permanently David> allocated for just this one driver alone. There is no such thing at this time. If you can come up with a clean model, we may try to implement it. If I do a compiler for the PIC18f, I think I'll do a full blown register allocator, as the multiple FSR can be of some use there. Sam -- Samuel Tardieu -- [email protected] -- http://www.rfc1149.net/sam