Re: [dpdk-dev] [PATCH 1/2] eal: add macros to align value to multiple

[Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>]

Hi Konstantin,

On Wed, Mar 14, 2018 at 10:42:54AM +0000, Ananyev, Konstantin wrote:
> Hi Pavan,
>
> >
> > Add macros to align given value to the multiple of the supplied
> > integer.
> >
> > Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
> > ---
> >
> >  Common code needed for OcteonTx event timer device.
> >
> >  lib/librte_eal/common/include/rte_common.h | 16 ++++++++++++++++
> >  1 file changed, 16 insertions(+)
> >
> > diff --git a/lib/librte_eal/common/include/rte_common.h b/lib/librte_eal/common/include/rte_common.h
> > index c7803e41c..2052b5300 100644
> > --- a/lib/librte_eal/common/include/rte_common.h
> > +++ b/lib/librte_eal/common/include/rte_common.h
> > @@ -190,6 +190,22 @@ static void __attribute__((constructor(prio), used)) func(void)
> >   */
> >  #define RTE_ALIGN(val, align) RTE_ALIGN_CEIL(val, align)
> >
> > +/**
> > + * Macro to align a value to the multiple of given value. The resultant
> > + * value will be of the same type as the first parameter and will be no lower
> > + * than the first parameter.
> > + */
> > +#define RTE_ALIGN_MUL_CEIL(v, mul) \
> > +	(((v + (typeof(v)) mul - 1) / ((typeof(v)) mul)) * (typeof(v))mul)
>
> I think you need to add braces around mul:
> (((v + (typeof(v))(mul) - 1) / ((typeof(v))(mul))) * (typeof(v))(mul))
> Same above.

Agreed, will roll up a v2.

> Konstantin

Thanks for reviewing,
Pavan.

>
> > +
> > +/**
> > + * Macro to align a value to the multiple of given value. The resultant
> > + * value will be of the same type as the first parameter and will be no higher
> > + * than the first parameter.
> > + */
> > +#define RTE_ALIGN_MUL_FLOOR(v, mul) \
> > +	((v / ((typeof(v)) mul)) * (typeof(v))mul)
> > +
> >  /**
> >   * Checks if a pointer is aligned to a given power-of-two value
> >   *
> > --
> > 2.16.2
>