Re: [avr-gcc-list] It is more than: .byte SYMA - SYMB

[Joerg Wunsch]

As Denis Chertykov <address@hidden> wrote:

>> c: .string  "Hello World"
>>    .align 2
>> d: ldi   XH,pm_hi8(d - c)     <- OK
>>    ldd   r16,Y+(d - c)        <- Error: constant value required

>This happened because relocations for Y+N or Z+N not supported.
>Please read GAS info about relocations.

Still, i don't see (after reading the gas manual) when the assembler
decides that it'll be a relocation vs. an absolute expression.

Am i right that changing the code like this would make it an
absolute expression again?

   .align 2
c: .string  "Hello World"
   .align 2
d: ldi   XH,pm_hi8(d - c)     <- OK
   ldd   r16,Y+(d - c)        <- Error: constant value required

If not, i'm confused, since as far as i can tell, in the above,
d - c is an assembly-time constant expression.
-- 
J"org Wunsch                                           Unix support engineer
address@hidden        http://www.interface-systems.de/~j/