[turbofan] Introduce Float64Pow and NumberPow operators.

[turbofan] Introduce Float64Pow and NumberPow operators.

Introduce a new machine operator Float64Pow that for now is backed by
the existing MathPowStub to start the unification of Math.pow, and at
the same time address the main performance issue that TurboFan still has
with the imaging-darkroom benchmark in Kraken.

Also migrate the Math.pow builtin itself to a TurboFan builtin and
remove a few hundred lines of hand-written platform code for special
handling of the fullcodegen Math.pow version.

BUG=v8:3599, v8:5086, v8:5157
Committed: https://crrev.com/e607e12ea0a706a0b8cb109e95f923426094dc09
Cr-Commit-Position: refs/heads/master@{#37323}

[Benedikt Meurer, 2016-06-28 07:42:02]

bmeurer@chromium.org changed reviewers:
+ epertoso@chromium.org

[Benedikt Meurer, 2016-06-28 07:42:03]

Hey Enrico,

Here's the CL I asked you about.
Please take a look.

Thanks,
Benedikt

Andreas: FYI (wasm)

[epertoso, 2016-06-28 07:54:24]

lgtm

[Benedikt Meurer, 2016-06-28 09:54:18]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2016-06-28 09:54:19]

The patchset sent to the CQ was uploaded after l-g-t-m from
epertoso@chromium.org
Link to the patchset: https://codereview.chromium.org/2103733003/#ps40001
(title: "REBASE on ARM64 bug fix.")

[commit-bot: I haz the power, 2016-06-28 09:54:29]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-06-28 09:54:30]

This CL has an open dependency (Issue 2103793002 Patch 1). Please resolve the
dependency and try again.
If you are sure that there is no real dependency, please use one of the options
listed in https://goo.gl/9Es4OR to land the CL.

[Benedikt Meurer, 2016-06-28 09:55:54]

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

[commit-bot: I haz the power, 2016-06-28 09:55:58]

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

[Benedikt Meurer, 2016-06-28 10:15:51]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-06-28 10:15:58]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-06-28 10:16:06]

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, 2016-06-28 10:24:09]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-06-28 10:26:19]

Description was changed from

==========
[turbofan] Introduce Float64Pow and NumberPow operators.

Introduce a new machine operator Float64Pow that for now is backed by
the existing MathPowStub to start the unification of Math.pow, and at
the same time address the main performance issue that TurboFan still has
with the imaging-darkroom benchmark in Kraken.

Also migrate the Math.pow builtin itself to a TurboFan builtin and
remove a few hundred lines of hand-written platform code for special
handling of the fullcodegen Math.pow version.

BUG=v8:3599,v8:5086,v8:5157
==========

to

==========
[turbofan] Introduce Float64Pow and NumberPow operators.

Introduce a new machine operator Float64Pow that for now is backed by
the existing MathPowStub to start the unification of Math.pow, and at
the same time address the main performance issue that TurboFan still has
with the imaging-darkroom benchmark in Kraken.

Also migrate the Math.pow builtin itself to a TurboFan builtin and
remove a few hundred lines of hand-written platform code for special
handling of the fullcodegen Math.pow version.

BUG=v8:3599,v8:5086,v8:5157

Committed: https://crrev.com/e607e12ea0a706a0b8cb109e95f923426094dc09
Cr-Commit-Position: refs/heads/master@{#37323}
==========

[commit-bot: I haz the power, 2016-06-28 10:26:20]

Patchset 3 (id:??) landed as
https://crrev.com/e607e12ea0a706a0b8cb109e95f923426094dc09
Cr-Commit-Position: refs/heads/master@{#37323}