X87: [builtins] Migrate Math.log to TurboFan.

X87: [builtins] Migrate Math.log to TurboFan.

  port f2da19fe393124c517f9949183e988e669e4f628 (r36703)

  original commit message:
  Introduce a dedicated Float64Log machine operator, that is either
  implemented by a direct C call or by platform specific code, i.e.
  using the FPU on x64 and ia32.

  This operator is used to implement Math.log as a proper TurboFan
  builtin on top of the CodeStubAssembler.

  Also introduce a NumberLog simplified operator on top of Float64Log
  and use that for the fast inline path of Math.log inside TurboFan
  optimized code.

BUG=

Committed: https://crrev.com/973823e454a97c9d41407163b2a885b1d19993dc
Cr-Commit-Position: refs/heads/master@{#36727}

[zhengxing.li, 2016-06-06 02:13:02]

zhengxing.li@intel.com changed reviewers:
+ bmeurer@chromium.org, chunyang.dai@intel.com, weiliang.lin@intel.com

[zhengxing.li, 2016-06-06 02:13:02]

PTAL, thanks!

[Weiliang, 2016-06-06 02:37:02]

lgtm

[zhengxing.li, 2016-06-06 02:37:51]

The CQ bit was checked by zhengxing.li@intel.com

[commit-bot: I haz the power, 2016-06-06 02:37:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2034393002/1

[commit-bot: I haz the power, 2016-06-06 02:58:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-06 03:01:20]

Description was changed from

==========
X87: [builtins] Migrate Math.log to TurboFan.

  port f2da19fe393124c517f9949183e988e669e4f628 (r36703)

  original commit message:
  Introduce a dedicated Float64Log machine operator, that is either
  implemented by a direct C call or by platform specific code, i.e.
  using the FPU on x64 and ia32.

  This operator is used to implement Math.log as a proper TurboFan
  builtin on top of the CodeStubAssembler.

  Also introduce a NumberLog simplified operator on top of Float64Log
  and use that for the fast inline path of Math.log inside TurboFan
  optimized code.

BUG=
==========

to

==========
X87: [builtins] Migrate Math.log to TurboFan.

  port f2da19fe393124c517f9949183e988e669e4f628 (r36703)

  original commit message:
  Introduce a dedicated Float64Log machine operator, that is either
  implemented by a direct C call or by platform specific code, i.e.
  using the FPU on x64 and ia32.

  This operator is used to implement Math.log as a proper TurboFan
  builtin on top of the CodeStubAssembler.

  Also introduce a NumberLog simplified operator on top of Float64Log
  and use that for the fast inline path of Math.log inside TurboFan
  optimized code.

BUG=

Committed: https://crrev.com/973823e454a97c9d41407163b2a885b1d19993dc
Cr-Commit-Position: refs/heads/master@{#36727}
==========

[commit-bot: I haz the power, 2016-06-06 03:01:22]

Patchset 1 (id:??) landed as
https://crrev.com/973823e454a97c9d41407163b2a885b1d19993dc
Cr-Commit-Position: refs/heads/master@{#36727}