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Re: trouble with porting architecture
On Dec 30, 2003, at 12:30, Eric Botcazou wrote:
I think it is a consequence of the extremely low number of 8-bit
registers
on the MC6809, which makes it difficult for GCC's register allocation
strategy (namely, the reload pass) to work reliably on this
architecture.
I myself ran into the problem several times.
One common work around on that processor is to consider a few locations
in
page zero (first 256 bytes of memory) as fake 16-bit registers (one or
two),
since these locations are relatively cheap to load/store.