Detect CRC32 instructions on ARMv8.

Detect CRC32 instructions on ARMv8.

I have successfully detected CRC32 instruction support on my Nexus 5x.

Use of these instructions to follow... I am not yet sure which compilers if any will give me instrinsics or let me write them in asm.

defined(__ARM_FEATURE_CRC32) should cover users like Android Framework who build with the best settings possible.  cpu-features.h covers use cases like Clank and our bots.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002

Committed: https://skia.googlesource.com/skia/+/f1b6030b44a4a9523183c3809a165b6b5353fff5

[mtklein_C, 2016-08-18 22:16:42]

Description was changed from

==========
Detect CRC32 instructions on ARMv8.

BUG=skia:
==========

to

==========
Detect CRC32 instructions on ARMv8.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002
==========

[mtklein_C, 2016-08-18 22:20:13]

Description was changed from

==========
Detect CRC32 instructions on ARMv8.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002
==========

to

==========
Detect CRC32 instructions on ARMv8.

I have successfully detected CRC32 instruction support on my Nexus 5x.

Use of these instructions to follow...

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002
==========

[mtklein_C, 2016-08-18 22:20:20]

The CQ bit was checked by mtklein@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-18 22:20:29]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[mtklein_C, 2016-08-18 22:26:57]

Description was changed from

==========
Detect CRC32 instructions on ARMv8.

I have successfully detected CRC32 instruction support on my Nexus 5x.

Use of these instructions to follow...

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002
==========

to

==========
Detect CRC32 instructions on ARMv8.

I have successfully detected CRC32 instruction support on my Nexus 5x.

Use of these instructions to follow...

defined(__ARM_FEATURE_CRC32) should cover users like Android Framework who build
with the best settings possible.  cpu-features.h covers use cases like Clank and
our bots.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002
==========

[mtklein_C, 2016-08-18 22:27:39]

Description was changed from

==========
Detect CRC32 instructions on ARMv8.

I have successfully detected CRC32 instruction support on my Nexus 5x.

Use of these instructions to follow...

defined(__ARM_FEATURE_CRC32) should cover users like Android Framework who build
with the best settings possible.  cpu-features.h covers use cases like Clank and
our bots.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002
==========

to

==========
Detect CRC32 instructions on ARMv8.

I have successfully detected CRC32 instruction support on my Nexus 5x.

Use of these instructions to follow... I am not yet sure which compilers if any
will let me write them.

defined(__ARM_FEATURE_CRC32) should cover users like Android Framework who build
with the best settings possible.  cpu-features.h covers use cases like Clank and
our bots.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002
==========

[mtklein_C, 2016-08-18 22:27:55]

Description was changed from

==========
Detect CRC32 instructions on ARMv8.

I have successfully detected CRC32 instruction support on my Nexus 5x.

Use of these instructions to follow... I am not yet sure which compilers if any
will let me write them.

defined(__ARM_FEATURE_CRC32) should cover users like Android Framework who build
with the best settings possible.  cpu-features.h covers use cases like Clank and
our bots.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002
==========

to

==========
Detect CRC32 instructions on ARMv8.

I have successfully detected CRC32 instruction support on my Nexus 5x.

Use of these instructions to follow... I am not yet sure which compilers if any
will give me instrinsics or let me write them in asm.

defined(__ARM_FEATURE_CRC32) should cover users like Android Framework who build
with the best settings possible.  cpu-features.h covers use cases like Clank and
our bots.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002
==========

[mtklein_C, 2016-08-18 22:30:10]

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

[msarett, 2016-08-18 22:33:24]

lgtm

[mtklein_C, 2016-08-18 22:34:27]

The CQ bit was unchecked by mtklein@chromium.org

[mtklein_C, 2016-08-18 22:34:28]

The CQ bit was checked by mtklein@chromium.org

[commit-bot: I haz the power, 2016-08-18 22:34:38]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-18 22:59:11]

Description was changed from

==========
Detect CRC32 instructions on ARMv8.

I have successfully detected CRC32 instruction support on my Nexus 5x.

Use of these instructions to follow... I am not yet sure which compilers if any
will give me instrinsics or let me write them in asm.

defined(__ARM_FEATURE_CRC32) should cover users like Android Framework who build
with the best settings possible.  cpu-features.h covers use cases like Clank and
our bots.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002
==========

to

==========
Detect CRC32 instructions on ARMv8.

I have successfully detected CRC32 instruction support on my Nexus 5x.

Use of these instructions to follow... I am not yet sure which compilers if any
will give me instrinsics or let me write them in asm.

defined(__ARM_FEATURE_CRC32) should cover users like Android Framework who build
with the best settings possible.  cpu-features.h covers use cases like Clank and
our bots.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2259133002

Committed:
https://skia.googlesource.com/skia/+/f1b6030b44a4a9523183c3809a165b6b5353fff5
==========

[commit-bot: I haz the power, 2016-08-18 22:59:12]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/f1b6030b44a4a9523183c3809a165b6b5353fff5