[avr-gcc-list] Use of registers

[Knut.Schwichtenberg]

Hi,

I'm thinking of coupling an assembler module and some C routines. Within 
the assembler sources an extensive use of registers as permanent store 
of data was made. The avr-libc documentation FAQ #13 describes the use 
of the registers. So it looks bad.
Is there any option to prevent the compiler to use all registers and 
leave some unused or is it possible to define the "assembler used 
registers" as variables so they are not touched by the compiler?

Thanks

Knut