S390: [builtins] Introduce proper Float64Log1p, Float64Atan and Float64Atan2 operators.

S390: [builtins] Introduce proper Float64Log1p, Float64Atan and Float64Atan2 operators.

Port 7ceed92ac036d6b4e402d76a5cea130a3c4cfbf1
Port 89d8c57b9c3b29e7977b13f0a9eed6bd8fb6772d

Original commit message:

    Import base::ieee754::atan() and base::ieee754::atan2() from fdlibm and
    introduce Float64Atan and Float64Atan2 TurboFan operators based on those,
    similar to what we already did for Float64Log and Float64Log1p. Rewrite
    Math.atan() and Math.atan2() as TurboFan builtin and use the operators
    to also inline Math.atan() and Math.atan2() into optimized TurboFan functions.

    Import base::ieee754::log1p() from fdlibm and introduce a Float64Log1p
    TurboFan operator based on that, similar to what we do for Float64Log.
    Rewrite Math.log1p() as TurboFan builtin and use that operator to also
    inline Math.log1p() into optimized TurboFan functions.

    Also unify the handling of the special IEEE 754 functions somewhat in
    the TurboFan backends. At some point we can hopefully express this
    completely in the InstructionSelector (once we have an idea what to do
    with the ST(0) return issue on IA-32/X87).

    Drive-by-fix: Add some more test coverage for the log function.

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

Committed: https://crrev.com/b78b0bf90c1e58414ad94c997287cf5564d330f0
Cr-Commit-Position: refs/heads/master@{#36946}

[john.yan, 2016-06-14 00:30:32]

PTAL

[john.yan, 2016-06-14 00:30:46]

The CQ bit was checked by jyan@ca.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2016-06-14 00:30:50]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2064783002/1

[JoranSiu, 2016-06-14 00:46:38]

On 2016/06/14 00:30:50, 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/2064783002/1

lgtm

[commit-bot: I haz the power, 2016-06-14 01:01:01]

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

[commit-bot: I haz the power, 2016-06-14 01:01:02]

Dry run: This issue passed the CQ dry run.

[john.yan, 2016-06-14 01:38:14]

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

[commit-bot: I haz the power, 2016-06-14 01:38:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2064783002/1

[commit-bot: I haz the power, 2016-06-14 05:13:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-14 06:12:16]

Description was changed from

==========
S390: [builtins] Introduce proper Float64Log1p, Float64Atan and Float64Atan2
operators.

Port 7ceed92ac036d6b4e402d76a5cea130a3c4cfbf1
Port 89d8c57b9c3b29e7977b13f0a9eed6bd8fb6772d

Original commit message:

    Import base::ieee754::atan() and base::ieee754::atan2() from fdlibm and
    introduce Float64Atan and Float64Atan2 TurboFan operators based on those,
    similar to what we already did for Float64Log and Float64Log1p. Rewrite
    Math.atan() and Math.atan2() as TurboFan builtin and use the operators
    to also inline Math.atan() and Math.atan2() into optimized TurboFan
functions.

    Import base::ieee754::log1p() from fdlibm and introduce a Float64Log1p
    TurboFan operator based on that, similar to what we do for Float64Log.
    Rewrite Math.log1p() as TurboFan builtin and use that operator to also
    inline Math.log1p() into optimized TurboFan functions.

    Also unify the handling of the special IEEE 754 functions somewhat in
    the TurboFan backends. At some point we can hopefully express this
    completely in the InstructionSelector (once we have an idea what to do
    with the ST(0) return issue on IA-32/X87).

    Drive-by-fix: Add some more test coverage for the log function.

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

to

==========
S390: [builtins] Introduce proper Float64Log1p, Float64Atan and Float64Atan2
operators.

Port 7ceed92ac036d6b4e402d76a5cea130a3c4cfbf1
Port 89d8c57b9c3b29e7977b13f0a9eed6bd8fb6772d

Original commit message:

    Import base::ieee754::atan() and base::ieee754::atan2() from fdlibm and
    introduce Float64Atan and Float64Atan2 TurboFan operators based on those,
    similar to what we already did for Float64Log and Float64Log1p. Rewrite
    Math.atan() and Math.atan2() as TurboFan builtin and use the operators
    to also inline Math.atan() and Math.atan2() into optimized TurboFan
functions.

    Import base::ieee754::log1p() from fdlibm and introduce a Float64Log1p
    TurboFan operator based on that, similar to what we do for Float64Log.
    Rewrite Math.log1p() as TurboFan builtin and use that operator to also
    inline Math.log1p() into optimized TurboFan functions.

    Also unify the handling of the special IEEE 754 functions somewhat in
    the TurboFan backends. At some point we can hopefully express this
    completely in the InstructionSelector (once we have an idea what to do
    with the ST(0) return issue on IA-32/X87).

    Drive-by-fix: Add some more test coverage for the log function.

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

Committed: https://crrev.com/b78b0bf90c1e58414ad94c997287cf5564d330f0
Cr-Commit-Position: refs/heads/master@{#36946}
==========

[commit-bot: I haz the power, 2016-06-14 06:12:17]

Patchset 1 (id:??) landed as
https://crrev.com/b78b0bf90c1e58414ad94c997287cf5564d330f0
Cr-Commit-Position: refs/heads/master@{#36946}