Attempt to let libvpx's SSE files build with clang-cl.

Attempt to let libvpx's SSE files build with clang-cl.

cl.exe can use intrinsics even if the arch targeted by the compiler doesn't
support the SSE level needed by the intrinsic.

clang (and gcc) can't do this, because it converts intrinsics into general
LLVM operations, and the LLVM bitcode is then translated back into assembly
later on, based on the target arch.

So explicitly enable SSSE3 and SSE4 when using clang-cl, so that the intrinsics
compile.

(It's unfortunate that clang-cl deviates fairly heavily from cl in this regard.
But this is very difficult to change, and it's the only larger deviation so
far.)

Depends on https://codereview.chromium.org/508433003/

Similar to https://codereview.chromium.org/475273002/ and
https://codereview.chromium.org/493883002/

BUG=82385
r291625

[Nico, 2014-08-25 23:04:58]

thakis@chromium.org changed reviewers:
+ fgalligan@chromium.org, johannkoenig@chromium.org

[Nico, 2014-08-26 00:27:36]

thakis@chromium.org changed reviewers:
+ tomfinegan@chromium.org

[Nico, 2014-08-26 00:27:36]

Tom, since you approved the prerequisite CL, do you want to stamp this one too?

[Tom Finegan, 2014-08-26 00:30:33]

On 2014/08/26 00:27:36, Nico (hiding) wrote:
> Tom, since you approved the prerequisite CL, do you want to stamp this one
too?

lgtm + bonus points for the generated output wrapping at 80

[Johann, 2014-09-02 17:08:19]

Is this ready to merge?

[Nico, 2014-09-02 17:12:49]

On 2014/09/02 17:08:19, Johann wrote:
> Is this ready to merge?

I landed this r291625 last week already.

[Johann, 2014-09-02 17:16:19]

On 2014/09/02 17:12:49, Nico (hiding) wrote:
> On 2014/09/02 17:08:19, Johann wrote:
> > Is this ready to merge?
> 
> I landed this r291625 last week already.

Ahh, thanks

[Nico, 2015-06-05 00:53:47]

Huh, looks like there are two libvpx repos:

https://chromium.googlesource.com/webm/libvpx/
https://chromium.googlesource.com/chromium/deps/libvpx/

My CL made it to the latter. Is that the right one?

[Tom Finegan, 2015-06-05 01:24:34]

On 2015/06/05 00:53:47, Nico wrote:
> Huh, looks like there are two libvpx repos:
> 
> https://chromium.googlesource.com/webm/libvpx/
> https://chromium.googlesource.com/chromium/deps/libvpx/
> 
> My CL made it to the latter. Is that the right one?

For Chromium, yes. The webm/libvpx repo is the upstream repo tracked by Chromium
in deps (with Chromium config stuff like gyp/gn files and update scripts).

[chromium-reviews, 2015-06-05 01:54:16]

The next step is to update src/DEPS with the hash from your change. I think
I have a recent change in my dashboard you can use as a template
On Jun 4, 2015 9:24 PM, <tomfinegan@chromium.org> wrote:

> On 2015/06/05 00:53:47, Nico wrote:
>
>> Huh, looks like there are two libvpx repos:
>>
>
>  https://chromium.googlesource.com/webm/libvpx/
>> https://chromium.googlesource.com/chromium/deps/libvpx/
>>
>
>  My CL made it to the latter. Is that the right one?
>>
>
> For Chromium, yes. The webm/libvpx repo is the upstream repo tracked by
> Chromium
> in deps (with Chromium config stuff like gyp/gn files and update scripts).
>
> https://codereview.chromium.org/504893003/
>

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to chromium-reviews+unsubscribe@chromium.org.

[chromium-reviews, 2015-06-05 01:55:43]

https://codereview.chromium.org/1159113005
On Jun 4, 2015 9:54 PM, "Johann Koenig" <johannkoenig@google.com> wrote:

> The next step is to update src/DEPS with the hash from your change. I
> think I have a recent change in my dashboard you can use as a template
> On Jun 4, 2015 9:24 PM, <tomfinegan@chromium.org> wrote:
>
>> On 2015/06/05 00:53:47, Nico wrote:
>>
>>> Huh, looks like there are two libvpx repos:
>>>
>>
>>  https://chromium.googlesource.com/webm/libvpx/
>>> https://chromium.googlesource.com/chromium/deps/libvpx/
>>>
>>
>>  My CL made it to the latter. Is that the right one?
>>>
>>
>> For Chromium, yes. The webm/libvpx repo is the upstream repo tracked by
>> Chromium
>> in deps (with Chromium config stuff like gyp/gn files and update scripts).
>>
>> https://codereview.chromium.org/504893003/
>>
>

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to chromium-reviews+unsubscribe@chromium.org.

[Nico, 2015-06-05 01:56:48]

Thanks, I have that in the cq already.
On Jun 4, 2015 6:54 PM, "Johann Koenig" <johannkoenig@google.com> wrote:

> The next step is to update src/DEPS with the hash from your change. I
> think I have a recent change in my dashboard you can use as a template
> On Jun 4, 2015 9:24 PM, <tomfinegan@chromium.org> wrote:
>
>> On 2015/06/05 00:53:47, Nico wrote:
>>
>>> Huh, looks like there are two libvpx repos:
>>>
>>
>>  https://chromium.googlesource.com/webm/libvpx/
>>> https://chromium.googlesource.com/chromium/deps/libvpx/
>>>
>>
>>  My CL made it to the latter. Is that the right one?
>>>
>>
>> For Chromium, yes. The webm/libvpx repo is the upstream repo tracked by
>> Chromium
>> in deps (with Chromium config stuff like gyp/gn files and update scripts).
>>
>> https://codereview.chromium.org/504893003/
>>
>

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