[builtins] Introduce proper Float64Tan operator.

[builtins] Introduce proper Float64Tan operator.

Import base::ieee754::tan() from fdlibm and introduce Float64Tan TurboFan
operator based on that, similar to what we do for Float64Cos and Float64Sin.
Rewrite Math.tan() as TurboFan builtin and use those operators to also
inline Math.tan() into optimized TurboFan functions.

Drive-by-fix: Kill the %_ConstructDouble intrinsics, and provide only
the %ConstructDouble runtime entry for writing tests.

BUG=v8:5086, v8:5126
R=yangguo@chromium.org

Committed: https://crrev.com/c87168bc8c76cd491f72eb847a962dec2e5ff1fd
Cr-Commit-Position: refs/heads/master@{#37087}

[Benedikt Meurer, 2016-06-20 05:17:58]

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

[Benedikt Meurer, 2016-06-20 05:17:58]

Hey Yang,

Same thing for tangents.
Please take a look.

Thanks,
Benedikt

Andreas: FYI (wasm)

[Benedikt Meurer, 2016-06-20 05:23:17]

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

[commit-bot: I haz the power, 2016-06-20 05:23:24]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2083453002/1

[Yang, 2016-06-20 05:48:47]

On 2016/06/20 05:23:24, commit-bot: I haz the power wrote:
> Dry run: CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/2083453002/1

lgtm.

[Benedikt Meurer, 2016-06-20 05:48:59]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-06-20 05:49:05]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-06-20 05:49:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2083453002/1

[commit-bot: I haz the power, 2016-06-20 05:51:48]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-20 05:52:04]

Description was changed from

==========
[builtins] Introduce proper Float64Tan operator.

Import base::ieee754::tan() from fdlibm and introduce Float64Tan TurboFan
operator based on that, similar to what we do for Float64Cos and Float64Sin.
Rewrite Math.tan() as TurboFan builtin and use those operators to also
inline Math.tan() into optimized TurboFan functions.

Drive-by-fix: Kill the %_ConstructDouble intrinsics, and provide only
the %ConstructDouble runtime entry for writing tests.

BUG=v8:5086,v8:5126
R=yangguo@chromium.org
==========

to

==========
[builtins] Introduce proper Float64Tan operator.

Import base::ieee754::tan() from fdlibm and introduce Float64Tan TurboFan
operator based on that, similar to what we do for Float64Cos and Float64Sin.
Rewrite Math.tan() as TurboFan builtin and use those operators to also
inline Math.tan() into optimized TurboFan functions.

Drive-by-fix: Kill the %_ConstructDouble intrinsics, and provide only
the %ConstructDouble runtime entry for writing tests.

BUG=v8:5086,v8:5126
R=yangguo@chromium.org

Committed: https://crrev.com/c87168bc8c76cd491f72eb847a962dec2e5ff1fd
Cr-Commit-Position: refs/heads/master@{#37087}
==========

[commit-bot: I haz the power, 2016-06-20 05:52:06]

Patchset 1 (id:??) landed as
https://crrev.com/c87168bc8c76cd491f72eb847a962dec2e5ff1fd
Cr-Commit-Position: refs/heads/master@{#37087}