Re: [dpdk-dev] [PATCH v2 05/10] eal: add and use unaligned integer types

[Thomas Monjalon <thomas.monjalon@6wind.com>]

2015-06-22 09:47, Cyril Chemparathy:
> On Mon, 22 Jun 2015 11:36:20 +0200
> Thomas Monjalon <thomas.monjalon@6wind.com> wrote:
> 
> > 2015-06-19 10:34, Cyril Chemparathy:
> > > On machines that are strict on pointer alignment, current code
> > > breaks on GCC's -Wcast-align checks on casts from narrower to wider
> > > types. This patch introduces new unaligned_uint(16|32|64)_t types,
> > > which correctly retain alignment in such cases.
> > [...]
> > > +#ifdef RTE_ARCH_STRICT_ALIGN
> > > +typedef uint64_t unaligned_uint64_t __attribute__ ((aligned(1)));
> > > +typedef uint32_t unaligned_uint32_t __attribute__ ((aligned(1)));
> > > +typedef uint16_t unaligned_uint16_t __attribute__ ((aligned(1)));
> > > +#else
> > > +typedef uint64_t unaligned_uint64_t;
> > > +typedef uint32_t unaligned_uint32_t;
> > > +typedef uint16_t unaligned_uint16_t;
> > > +#endif
> > 
> > CONFIG_RTE_ARCH_STRICT_ALIGN should be declared (and disabled) in
> > config templates.
> 
> Sure.  Will include in v3.  I'm assuming this goes into
> common_linuxapp and common_bsdapp, allowing specific architectures to
> override if necessary.  Correct?

Yes, thanks