X87: [wasm] Int64Lowering of Int64Sub on ia32 and arm.

X87: [wasm] Int64Lowering of Int64Sub on ia32 and arm.

  port 33c08596e10f8ed64f8097049ac6c424c0616ee1 (r34808)

  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.

  @v8-arm-ports: please take a careful look at the implementation of sbc
  in the simulator

BUG=

Committed: https://crrev.com/831add808dcc9429b48719b9e45e9ab85c27c084
Cr-Commit-Position: refs/heads/master@{#34844}

[zhengxing.li, 2016-03-17 07:59:18]

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

[zhengxing.li, 2016-03-17 07:59:18]

PTAL, thanks!

[Weiliang, 2016-03-17 08:10:17]

lgtm

[zhengxing.li, 2016-03-17 08:12:32]

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

[commit-bot: I haz the power, 2016-03-17 08:12:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1812753003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1812753003/1

[commit-bot: I haz the power, 2016-03-17 08:35:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-17 08:37:01]

Description was changed from

==========
X87: [wasm] Int64Lowering of Int64Sub on ia32 and arm.

  port 33c08596e10f8ed64f8097049ac6c424c0616ee1 (r34808)

  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.

  @v8-arm-ports: please take a careful look at the implementation of sbc
  in the simulator

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

to

==========
X87: [wasm] Int64Lowering of Int64Sub on ia32 and arm.

  port 33c08596e10f8ed64f8097049ac6c424c0616ee1 (r34808)

  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.

  @v8-arm-ports: please take a careful look at the implementation of sbc
  in the simulator

BUG=

Committed: https://crrev.com/831add808dcc9429b48719b9e45e9ab85c27c084
Cr-Commit-Position: refs/heads/master@{#34844}
==========

[commit-bot: I haz the power, 2016-03-17 08:37:02]

Patchset 1 (id:??) landed as
https://crrev.com/831add808dcc9429b48719b9e45e9ab85c27c084
Cr-Commit-Position: refs/heads/master@{#34844}