X87: Make fast_exp take an Isolate* paramter.

X87: Make fast_exp take an Isolate* paramter.

  port 0fb2edd15dd108e54c73dd413dff6e192fb7ec0c (r32217)

  original commit message:
  We still share the code globally, but if we wanted, it would be easy to
  make it per isolate now

BUG=

Committed: https://crrev.com/116a248dba55ab1e35e8160ad0cef8729a50f776
Cr-Commit-Position: refs/heads/master@{#32242}

[zhengxing.li, 2015-11-25 04:02:56]

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

[Weiliang, 2015-11-25 04:06:12]

The CQ bit was checked by weiliang.lin@intel.com

[Weiliang, 2015-11-25 04:06:13]

lgtm

[commit-bot: I haz the power, 2015-11-25 04:06:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1477683002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1477683002/1

[commit-bot: I haz the power, 2015-11-25 04:51:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-25 04:51:57]

Patchset 1 (id:??) landed as
https://crrev.com/116a248dba55ab1e35e8160ad0cef8729a50f776
Cr-Commit-Position: refs/heads/master@{#32242}

[jochen (gone - plz use gerrit), 2015-11-25 09:01:37]

https://codereview.chromium.org/1477683002/diff/1/src/x87/codegen-x87.cc
File src/x87/codegen-x87.cc (right):

https://codereview.chromium.org/1477683002/diff/1/src/x87/codegen-x87.cc#newc...
src/x87/codegen-x87.cc:38: return x87_std_exp;
the init_fast_exp_function() in codegen.cc already uses std::exp with
CreateExpFunction returns a nullptr

[zhengxing.li, 2015-11-25 09:14:25]

On 2015/11/25 09:01:37, jochen wrote:
> https://codereview.chromium.org/1477683002/diff/1/src/x87/codegen-x87.cc
> File src/x87/codegen-x87.cc (right):
> 
>
https://codereview.chromium.org/1477683002/diff/1/src/x87/codegen-x87.cc#newc...
> src/x87/codegen-x87.cc:38: return x87_std_exp;
> the init_fast_exp_function() in codegen.cc already uses std::exp with
> CreateExpFunction returns a nullptr

Thanks! jochen.

This port intend to make the x87 port of V8 master health ASAP. I will work on
the optimized CreateExpFunction once I finished all pending patches that need to
be ported.