Why dont you use __builtin_prefetch() ?
On Thu, Jul 26, 2012 at 09:37:58PM +0000, Luigi Rizzo wrote: > Author: luigi > Date: Thu Jul 26 21:37:58 2012 > New Revision: 238818 > URL: http://svn.freebsd.org/changeset/base/238818 > > Log: > define prefetch as a noop on !x86 > > Modified: > head/sys/dev/netmap/netmap.c > > Modified: head/sys/dev/netmap/netmap.c > ============================================================================== > --- head/sys/dev/netmap/netmap.c Thu Jul 26 20:41:36 2012 > (r238817) > +++ head/sys/dev/netmap/netmap.c Thu Jul 26 21:37:58 2012 > (r238818) > @@ -220,7 +220,11 @@ struct nm_bridge nm_bridges[NM_BRIDGES]; > #ifndef linux > static inline void prefetch (const void *x) > { > +#if defined(__i386__) || defined(__amd64__) > __asm volatile("prefetcht0 %0" :: "m" (*(const unsigned long *)x)); > +#else > + (void)x; > +#endif > } > #endif /* !linux */ > _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
