[avr-gcc-list] ldd/lds and macro combination not work

[Klaus Rudolph]

Hi all,

if i have two ram adresses

.data
adr1: 
some bytes defined here
adr2:
some more bytes....


and use in my programm:

        ldi YL, lo8(adr1);
        ldi YH, hi8(adr1);
....
        ld R17, Y 
        and R17, R18
        std Y+(adr2-adr1), R17  ;error!
        
the assembler want a constant! But this is constant at all. 
Subtraction of two constants give a constant or? :-)

There is no problem with adress subtraction with other mnomics
there.

Any idea?

        Klaus
avr-gcc-list at http://avr1.org