Sk2x

Sk2x

This adds an API, an SSE impl, a portable impl, and some tests for Sk2f/Sk2d/Sk2s.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/bbecae0832996b72d1f6e7d39d2754651300d31e

[mtklein_C, 2015-03-19 15:56:17]

mtklein@chromium.org changed reviewers:
+ reed@google.com

[mtklein_C, 2015-03-19 16:35:02]

mtklein@chromium.org changed reviewers:
+ caryclark@google.com, msarett@google.com

[mtklein_C, 2015-03-19 16:35:03]

Started work on real impls over lunch.  Adding Matt for _sse.h.

Also realized Cary might want some say in API / impl.

[msarett, 2015-03-19 16:44:46]

lgtm

[mtklein, 2015-03-19 16:47:27]

The CQ bit was checked by mtklein@google.com

[mtklein, 2015-03-19 16:47:27]

The patchset sent to the CQ was uploaded after l-g-t-m from msarett@google.com
Link to the patchset: https://codereview.chromium.org/1025463002/#ps100001
(title: "note")

[commit-bot: I haz the power, 2015-03-19 16:47:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1025463002/100001

[mtklein, 2015-03-19 16:47:51]

The CQ bit was unchecked by mtklein@google.com

[reed1, 2015-03-19 17:16:06]

need copyright headers, but lgtm

[mtklein, 2015-03-19 17:27:32]

On 2015/03/19 17:16:06, reed1 wrote:
> need copyright headers, but lgtm

done

[mtklein, 2015-03-19 17:28:32]

The CQ bit was checked by mtklein@google.com

[mtklein, 2015-03-19 17:28:32]

The patchset sent to the CQ was uploaded after l-g-t-m from msarett@google.com,
reed@google.com
Link to the patchset: https://codereview.chromium.org/1025463002/#ps140001
(title: "(C)")

[commit-bot: I haz the power, 2015-03-19 17:28:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1025463002/140001

[mtklein, 2015-03-19 17:36:17]

The CQ bit was unchecked by mtklein@google.com

[mtklein, 2015-03-19 17:37:42]

The CQ bit was checked by mtklein@google.com

[mtklein, 2015-03-19 17:37:43]

The patchset sent to the CQ was uploaded after l-g-t-m from msarett@google.com,
reed@google.com
Link to the patchset: https://codereview.chromium.org/1025463002/#ps160001
(title: "missing inline")

[commit-bot: I haz the power, 2015-03-19 17:39:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1025463002/160001

[commit-bot: I haz the power, 2015-03-19 17:44:31]

Committed patchset #9 (id:160001) as
https://skia.googlesource.com/skia/+/bbecae0832996b72d1f6e7d39d2754651300d31e