> -----Original Message----- > From: > avr-libc-dev-bounces+eweddington=cso.atmel....@nongnu.org > [mailto:avr-libc-dev-bounces+eweddington=cso.atmel....@nongnu. > org] On Behalf Of Joerg Wunsch > Sent: Tuesday, March 17, 2009 10:02 AM > To: avr-libc-dev@nongnu.org > Subject: Re: [avr-libc-dev] Inline assembler and compiler optimization > > As Weddington, Eric wrote: > > > > Anyway, it might make sense to provide an additional macro like > > > __memory_barrier() that expands to __asm__ > > > __volatile__(""::"memory"). > > > If we do that, we might as well make it a public symbol, yes?: > > #define memory_barrier() __asm__ __volatile__(""::"memory") > > If we document it, it /is/ public. ;-) > > The point is that user programs might already use the identifier > memory_barrier so we'd better avoid redefining it (at least, as long > as it goes into one of the existing header files).
Hmm. I really hate having to explain the two leading underscores all over again. First, we should do some research to see if there is already a gcc builtin, available to the AVR, that does the same thing. _______________________________________________ AVR-libc-dev mailing list AVR-libc-dev@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-libc-dev
