From: Dave Gordon <david.s.gordon@intel.com>
To: Damien Lespiau <damien.lespiau@intel.com>,
Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915/bdw: Fix the write setting up the WIZ hashing mode
Date: Mon, 08 Dec 2014 14:17:45 +0000 [thread overview]
Message-ID: <5485B309.50103@intel.com> (raw)
In-Reply-To: <20141208135950.GB4337@strange.ger.corp.intel.com>
On 08/12/14 13:59, Damien Lespiau wrote:
> On Mon, Dec 08, 2014 at 02:33:57PM +0200, Jani Nikula wrote:
>>> #define _MASKED_BIT_ENABLE(a) (((a) << 16) | (a))
>>> #define _MASKED_BIT_DISABLE(a) ((a) << 16)
>>> +#define _MASKED_FIELD(value, mask) (((mask) << 16) | (value))
>>
>> Obligatory bikeshed, wouldn't you say _MASKED_BIT_{ENABLE,DISABLE} are
>> special cases of _MASKED_FIELD...? ;)
>
> That's because we're not just enabling or disabling bits here but
> setting a multi-bits value.
>
> _MASKED_FIELD(2 << 4, 0x3 << 4);
>
So you could
#define __MASKED_BIT_DISABLE(a) (__MASKED_FIELD(0, (a)))
#define __MASKED_BIT_ENABLE(a) (__MASKED_FIELD((a), (a)))
which I think is what Jani was referring to ...
Bikeshed++: do we care about the double evaluation of (a) in these macros?
.Dave.
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next prev parent reply other threads:[~2014-12-08 14:19 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-06 20:14 [PATCH] drm/i915/bdw: Fix the write setting up the WIZ hashing mode Damien Lespiau
2014-12-07 4:48 ` shuang.he
2014-12-08 12:33 ` Jani Nikula
2014-12-08 13:59 ` Damien Lespiau
2014-12-08 14:17 ` Dave Gordon [this message]
2014-12-08 14:36 ` Damien Lespiau
2014-12-08 14:21 ` Daniel Vetter
2014-12-08 14:23 ` Daniel Vetter
2014-12-08 14:46 ` Damien Lespiau
2014-12-08 16:22 ` [PATCH v2] " Damien Lespiau
2014-12-08 16:27 ` Daniel Vetter
2014-12-08 16:50 ` Dave Gordon
2014-12-08 16:54 ` Damien Lespiau
2014-12-08 16:56 ` Dave Gordon
2014-12-08 17:33 ` [PATCH v3] " Damien Lespiau
2014-12-09 22:14 ` shuang.he
2014-12-10 9:42 ` Jani Nikula
2014-12-10 12:03 ` Damien Lespiau
2014-12-10 13:55 ` Daniel Vetter
2014-12-09 19:14 ` [PATCH v2] " shuang.he
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