S390: [wasm] Int64Lowering of Int64Sub.

S390: [wasm] Int64Lowering of Int64Sub.

    Port 33c08596e10f8ed64f8097049ac6c424c0616ee1

    Original commit message:
        Int64Sub is lowered to a new turbofan operator, Int32SubPair. The new
        operator takes 4 inputs an generates 2 outputs. The inputs are the low
        word of the left input, high word of the left input, the low word of the
        right input, and high word of the right input. The ouputs are the low
        and high word of the result of the subtraction.

        The implementation is very similar to the implementation of Int64Add.

R=ahaas@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com
BUG=

Committed: https://crrev.com/680f50a9b90624f44ea28706fb52ca16d604512e
Cr-Commit-Position: refs/heads/master@{#34865}

[john.yan, 2016-03-17 15:00:19]

S390: [wasm] Int64Lowering of Int64Sub.

[john.yan, 2016-03-17 15:02:54]

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

[commit-bot: I haz the power, 2016-03-17 15:03:01]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1807243002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1807243002/1

[commit-bot: I haz the power, 2016-03-17 15:25:53]

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

[commit-bot: I haz the power, 2016-03-17 15:25:54]

Dry run: This issue passed the CQ dry run.

[JoranSiu, 2016-03-17 15:30:32]

On 2016/03/17 15:25:54, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

lgtm

[john.yan, 2016-03-17 15:30:58]

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

[john.yan, 2016-03-17 15:30:59]

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

[commit-bot: I haz the power, 2016-03-17 15:31:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1807243002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1807243002/1

[commit-bot: I haz the power, 2016-03-17 15:32:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-17 15:33:18]

Description was changed from

==========
S390: [wasm] Int64Lowering of Int64Sub.

    Port 33c08596e10f8ed64f8097049ac6c424c0616ee1

    Original commit message:
        Int64Sub is lowered to a new turbofan operator, Int32SubPair. The new
        operator takes 4 inputs an generates 2 outputs. The inputs are the low
        word of the left input, high word of the left input, the low word of the
        right input, and high word of the right input. The ouputs are the low
        and high word of the result of the subtraction.

        The implementation is very similar to the implementation of Int64Add.

R=ahaas@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com,
mbrandy@us.ibm.com
BUG=
==========

to

==========
S390: [wasm] Int64Lowering of Int64Sub.

    Port 33c08596e10f8ed64f8097049ac6c424c0616ee1

    Original commit message:
        Int64Sub is lowered to a new turbofan operator, Int32SubPair. The new
        operator takes 4 inputs an generates 2 outputs. The inputs are the low
        word of the left input, high word of the left input, the low word of the
        right input, and high word of the right input. The ouputs are the low
        and high word of the result of the subtraction.

        The implementation is very similar to the implementation of Int64Add.

R=ahaas@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com,
mbrandy@us.ibm.com
BUG=

Committed: https://crrev.com/680f50a9b90624f44ea28706fb52ca16d604512e
Cr-Commit-Position: refs/heads/master@{#34865}
==========

[commit-bot: I haz the power, 2016-03-17 15:33:20]

Patchset 1 (id:??) landed as
https://crrev.com/680f50a9b90624f44ea28706fb52ca16d604512e
Cr-Commit-Position: refs/heads/master@{#34865}