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Message-ID: <ZljRSXtXWdOyCJaB@smile.fi.intel.com>
Date: Thu, 30 May 2024 22:19:37 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Devarsh Thakkar <devarsht@...com>
Cc: mchehab@...nel.org, hverkuil-cisco@...all.nl,
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Subject: Re: [PATCH v10 06/11] math.h: Add macros for rounding to closest
value
On Thu, May 30, 2024 at 10:42:25PM +0530, Devarsh Thakkar wrote:
> Add below rounding related macros:
>
> round_closest_up(x, y) : Rounds x to closest multiple of y where y is a
> power of 2, with a preference to round up in case two nearest values are
> possible.
>
> round_closest_down(x, y) : Rounds x to closest multiple of y where y is a
> power of 2, with a preference to round down in case two nearest values are
> possible.
>
> roundclosest(x, y) : Rounds x to closest multiple of y, this macro should
> generally be used only when y is not multiple of 2 as otherwise
> round_closest* macros should be used which are much faster.
>
> Examples:
> * round_closest_up(17, 4) = 16
> * round_closest_up(15, 4) = 16
> * round_closest_up(14, 4) = 16
> * round_closest_down(17, 4) = 16
> * round_closest_down(15, 4) = 16
> * round_closest_down(14, 4) = 12
> * roundclosest(21, 5) = 20
> * roundclosest(19, 5) = 20
> * roundclosest(17, 5) = 15
..
> + * Examples :
It's inconsistent with the other one below.
> + * round_closest_up(17, 4) = 16
> + *
> + * round_closest_up(15, 4) = 16
> + *
> + * round_closest_up(14, 4) = 16
The three have TABs/spaces mixture.
I believe you wanted:
* Examples::
* * round_closest_up(17, 4) = 16
* * round_closest_up(15, 4) = 16
* * round_closest_up(14, 4) = 16
..
> + * Examples:
> + *
> + * round_closest_down(17, 4) = 16
> + *
> + * round_closest_down(15, 4) = 16
> + *
> + * round_closest_down(14, 4) = 12
As per above
..
> + * Examples :
> + *
> + * roundclosest(21, 5) = 20
> + *
> + * roundclosest(19, 5) = 20
> + *
> + * roundclosest(17, 5) = 15
As per above.
--
With Best Regards,
Andy Shevchenko
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