PPC/s390: [builtins] Introduce proper Float64Tan operator.

PPC/s390: [builtins] Introduce proper Float64Tan operator.

Port c87168bc8c76cd491f72eb847a962dec2e5ff1fd

Original commit message:

    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.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:5086, v8:5126
LOG=N

Committed: https://crrev.com/f1c2729dbdb3be7f553d96dcf24e05f0ed4aab8d
Cr-Commit-Position: refs/heads/master@{#37115}

[JaideepBajwa, 2016-06-20 15:40:59]

PTAL

[JoranSiu, 2016-06-20 17:50:41]

On 2016/06/20 15:40:59, JaideepBajwa wrote:
> PTAL

lgtm

[JaideepBajwa, 2016-06-20 18:05:38]

The CQ bit was checked by bjaideep@ca.ibm.com

[commit-bot: I haz the power, 2016-06-20 18:05:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2080303002/1

[commit-bot: I haz the power, 2016-06-20 18:28:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-20 18:30:29]

Description was changed from

==========
PPC/s390: [builtins] Introduce proper Float64Tan operator.

Port c87168bc8c76cd491f72eb847a962dec2e5ff1fd

Original commit message:

    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.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:5086,v8:5126
LOG=N
==========

to

==========
PPC/s390: [builtins] Introduce proper Float64Tan operator.

Port c87168bc8c76cd491f72eb847a962dec2e5ff1fd

Original commit message:

    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.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:5086,v8:5126
LOG=N

Committed: https://crrev.com/f1c2729dbdb3be7f553d96dcf24e05f0ed4aab8d
Cr-Commit-Position: refs/heads/master@{#37115}
==========

[commit-bot: I haz the power, 2016-06-20 18:30:30]

Patchset 1 (id:??) landed as
https://crrev.com/f1c2729dbdb3be7f553d96dcf24e05f0ed4aab8d
Cr-Commit-Position: refs/heads/master@{#37115}