Ok thanks i use gcc 4.3.2
secondary question is if i remove volatile from code
register unsigned char lastrec asm("r8")
then while generate asm efficient but dont work why?
a0: 88 11 cpse r24, r8
a2: ff cf rjmp .-2 ; 0xa2 <waitACK+0x2>
and without register volatile unsigned char lastrec
make work but big code
ac: 80 91 62 00 lds r24, 0x0062
b0: 98 17 cp r25, r24
b2: e1 f7 brne .-8 ; 0xac <waitACK+0x2>
I understand that gcc miss, but if register is clause to change storing
possition of var
and volatile is for "change defining on the fly" i dont understand trouble
for gcc compile this ok.
Joerg Wunsch wrote:
>
> max2009tiny <m...@canor-audio.com> wrote:
>
>> Hi everybody. I make project on Tiny2313 and use
>>
>> volatile register unsigned char lastrec asm("r8")
>
> "volatile register" doesn't work.
>
> There used to be a warning for this, which has been dropped in the
> past. GCC 4.4 does have the warning back:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34351
>
> --
> cheers, J"org .-.-. --... ...-- -.. . DL8DTL
>
> http://www.sax.de/~joerg/ NIC: JW11-RIPE
> Never trust an operating system you don't have sources for. ;-)
>
>
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