[wasm]implement simd lowering for f32x4->i32x4, i32x4 min/max and shift instructions

[wasm]implement simd lowering for f32x4->i32x4, i32x4 min/max and shift instructions

This fixes and relands https://codereview.chromium.org/2718323003.

R=bbudge@chromium.org,titzer@chromium.org,ahaas@chromium.org,machenbach@chromium.org,bradnelson@chromium.org
BUG=v8:6020
Review-Url: https://codereview.chromium.org/2724973003
Cr-Commit-Position: refs/heads/master@{#43561}
Committed: https://chromium.googlesource.com/v8/v8/+/81ad6b521fc070542fa09964a0f5451759c89680

[aseemgarg, 2017-03-02 00:21:45]

The earlier commit failed because Float64RoundTruncate wasn't supported on the
failing bot. Fixed it to make an external c call (same as wasm-compiler does).
Tested that the code works by commenting out Float64RoundTruncate and forcing
the external c call on my machine.

[bbudge, 2017-03-02 00:42:28]

lgtm

[aseemgarg, 2017-03-02 07:09:49]

Description was changed from

==========
[wasm]implement simd lowering for f32x4->i32x4, i32x4 min/max and shift
instructions

This fixes and relands https://codereview.chromium.org/2718323003.

R=bbudge@chromium.org,titzer@chromium.org,ahaas@chromium.org,machenbach@chrom...
BUG=v8:6020
==========

to

==========
[wasm]implement simd lowering for f32x4->i32x4, i32x4 min/max and shift
instructions

This fixes and relands https://codereview.chromium.org/2718323003.

R=bbudge@chromium.org,titzer@chromium.org,ahaas@chromium.org,machenbach@chrom...
BUG=v8:6020
==========

[aseemgarg, 2017-03-02 07:09:49]

aseemgarg@chromium.org changed reviewers:
+ gdeepti@chromium.org

[aseemgarg, 2017-03-02 23:17:50]

aseemgarg@chromium.org changed reviewers:
+ mtrofin@chromium.org

[Mircea Trofin, 2017-03-03 01:26:41]

On 2017/03/02 00:42:28, bbudge wrote:
> lgtm

lgtm, one nit

[Mircea Trofin, 2017-03-03 01:26:51]

https://codereview.chromium.org/2724973003/diff/20001/src/compiler/simd-scala...
File src/compiler/simd-scalar-lowering.h (right):

https://codereview.chromium.org/2724973003/diff/20001/src/compiler/simd-scala...
src/compiler/simd-scalar-lowering.h:69: struct NodeState {
while here, mind moving this struct together with "Replacement" above?

[aseemgarg, 2017-03-03 01:35:59]

https://codereview.chromium.org/2724973003/diff/20001/src/compiler/simd-scala...
File src/compiler/simd-scalar-lowering.h (right):

https://codereview.chromium.org/2724973003/diff/20001/src/compiler/simd-scala...
src/compiler/simd-scalar-lowering.h:69: struct NodeState {
On 2017/03/03 01:26:50, Mircea Trofin wrote:
> while here, mind moving this struct together with "Replacement" above?

Done.

[aseemgarg, 2017-03-03 01:36:37]

The CQ bit was checked by aseemgarg@chromium.org

[aseemgarg, 2017-03-03 01:36:38]

The patchset sent to the CQ was uploaded after l-g-t-m from bbudge@chromium.org,
mtrofin@chromium.org
Link to the patchset: https://codereview.chromium.org/2724973003/#ps40001
(title: "comment")

[commit-bot: I haz the power, 2017-03-03 01:36:49]

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, 2017-03-03 02:04:08]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1488504997621900,
"parent_rev": "ebe9e8cb6f0b8d62325525009a0532b37c7b3bde", "commit_rev":
"81ad6b521fc070542fa09964a0f5451759c89680"}

[commit-bot: I haz the power, 2017-03-03 02:04:14]

Description was changed from

==========
[wasm]implement simd lowering for f32x4->i32x4, i32x4 min/max and shift
instructions

This fixes and relands https://codereview.chromium.org/2718323003.

R=bbudge@chromium.org,titzer@chromium.org,ahaas@chromium.org,machenbach@chrom...
BUG=v8:6020
==========

to

==========
[wasm]implement simd lowering for f32x4->i32x4, i32x4 min/max and shift
instructions

This fixes and relands https://codereview.chromium.org/2718323003.

R=bbudge@chromium.org,titzer@chromium.org,ahaas@chromium.org,machenbach@chrom...
BUG=v8:6020

Review-Url: https://codereview.chromium.org/2724973003
Cr-Commit-Position: refs/heads/master@{#43561}
Committed:
https://chromium.googlesource.com/v8/v8/+/81ad6b521fc070542fa09964a0f5451759c...
==========

[commit-bot: I haz the power, 2017-03-03 02:04:15]

Committed patchset #3 (id:40001) as
https://chromium.googlesource.com/v8/v8/+/81ad6b521fc070542fa09964a0f5451759c...