Re: [avr-libc-dev] Inline assembler and compiler optimization

[Joerg Wunsch]

As Harald Kipp wrote:

> According to the document above, this may not work as expected. It
> should have been
> 
> # define sei()  __asm__ __volatile__ ("sei" :: "memory")

I think we've been at that discussion before, and eventually agreed
there's no point why sei() should imply a memory barrier.  I forgot
about the details though, it's been a number of years ago.

Anyway, it might make sense to provide an additional macro like
__memory_barrier() that expands to __asm__ __volatile__(""::"memory").

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)