X87: [wasm] Fix codegen issue for i64.add and i64.sub on ia32.

X87: [wasm] Fix codegen issue for i64.add and i64.sub on ia32.

  port 037200e6250d5ea6fbd4f5071615c8c850e5a661 (r42486)

  original commit message:
  The IA32AddPair and IA32SubPair instructions were using an input register as a
  temporary value, which led to registers sometimes being clobbered when they
  shouldn't have been. This led to problems, for example, in calling printf to
  format doubles:

  printf("%f", 1.2345) => 0.61725 (on x86)

BUG=

Review-Url: https://codereview.chromium.org/2645233002
Cr-Commit-Position: refs/heads/master@{#42587}
Committed: https://chromium.googlesource.com/v8/v8/+/8b5d1aa686a1966561493a9104dad37fbd5c46be

[zhengxing.li, 2017-01-23 01:55:09]

zhengxing.li@intel.com changed reviewers:
+ chunyang.dai@intel.com, eholk@chromium.org

[zhengxing.li, 2017-01-23 01:55:09]

PTAL, thanks!

[chunyang.dai, 2017-01-23 02:07:34]

On 2017/01/23 01:55:09, zhengxing.li wrote:
> PTAL, thanks!

LGTM.

tanks

[zhengxing.li, 2017-01-23 02:30:23]

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

[commit-bot: I haz the power, 2017-01-23 02:30:28]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-23 02:51:04]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1485138623505840, "parent_rev":
"932cf29f9ac1b549c43c5bbfc1b896ca7ff747bf", "commit_rev":
"8b5d1aa686a1966561493a9104dad37fbd5c46be"}

[commit-bot: I haz the power, 2017-01-23 02:51:08]

Description was changed from

==========
X87: [wasm] Fix codegen issue for i64.add and i64.sub on ia32.

  port 037200e6250d5ea6fbd4f5071615c8c850e5a661 (r42486)

  original commit message:
  The IA32AddPair and IA32SubPair instructions were using an input register as a
  temporary value, which led to registers sometimes being clobbered when they
  shouldn't have been. This led to problems, for example, in calling printf to
  format doubles:

  printf("%f", 1.2345) => 0.61725 (on x86)

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

to

==========
X87: [wasm] Fix codegen issue for i64.add and i64.sub on ia32.

  port 037200e6250d5ea6fbd4f5071615c8c850e5a661 (r42486)

  original commit message:
  The IA32AddPair and IA32SubPair instructions were using an input register as a
  temporary value, which led to registers sometimes being clobbered when they
  shouldn't have been. This led to problems, for example, in calling printf to
  format doubles:

  printf("%f", 1.2345) => 0.61725 (on x86)

BUG=

Review-Url: https://codereview.chromium.org/2645233002
Cr-Commit-Position: refs/heads/master@{#42587}
Committed:
https://chromium.googlesource.com/v8/v8/+/8b5d1aa686a1966561493a9104dad37fbd5...
==========

[commit-bot: I haz the power, 2017-01-23 02:51:08]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/8b5d1aa686a1966561493a9104dad37fbd5...