PPC: Work-around to preserve sNan bit

PPC: Work-around to preserve sNan bit

On ia32/x64 when casting a sNan to double, the signalling
bit is flipped to qNan.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2660873003
Cr-Commit-Position: refs/heads/master@{#42786}
Committed: https://chromium.googlesource.com/v8/v8/+/c0f255f0756430eec913560b25aa6659480e3f0e

[JaideepBajwa, 2017-01-30 18:16:00]

ptal

[john.yan, 2017-01-30 18:20:09]

lgtm with nits

https://codereview.chromium.org/2660873003/diff/1/src/compiler/ppc/code-gener...
File src/compiler/ppc/code-generator-ppc.cc (right):

https://codereview.chromium.org/2660873003/diff/1/src/compiler/ppc/code-gener...
src/compiler/ppc/code-generator-ppc.cc:2356: ? 2141192192
using hex seems more readable.

[JaideepBajwa, 2017-01-30 18:28:39]

On 2017/01/30 18:20:09, john.yan wrote:
> lgtm with nits
> 
>
https://codereview.chromium.org/2660873003/diff/1/src/compiler/ppc/code-gener...
> File src/compiler/ppc/code-generator-ppc.cc (right):
> 
>
https://codereview.chromium.org/2660873003/diff/1/src/compiler/ppc/code-gener...
> src/compiler/ppc/code-generator-ppc.cc:2356: ? 2141192192
> using hex seems more readable.

updated, thanks!

[JaideepBajwa, 2017-01-30 18:29:28]

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

[JaideepBajwa, 2017-01-30 18:29:28]

The patchset sent to the CQ was uploaded after l-g-t-m from jyan@ca.ibm.com
Link to the patchset: https://codereview.chromium.org/2660873003/#ps20001
(title: "addressed comments")

[commit-bot: I haz the power, 2017-01-30 18:29:33]

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, 2017-01-30 19:02:24]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1485800968356830,
"parent_rev": "e42da75c9eaa604353623b0bb17051513f05410a", "commit_rev":
"c0f255f0756430eec913560b25aa6659480e3f0e"}

[commit-bot: I haz the power, 2017-01-30 19:02:28]

Description was changed from

==========
PPC: Work-around to preserve sNan bit

On ia32/x64 when casting a sNan to double, the signalling
bit is flipped to qNan.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N
==========

to

==========
PPC: Work-around to preserve sNan bit

On ia32/x64 when casting a sNan to double, the signalling
bit is flipped to qNan.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2660873003
Cr-Commit-Position: refs/heads/master@{#42786}
Committed:
https://chromium.googlesource.com/v8/v8/+/c0f255f0756430eec913560b25aa6659480...
==========

[commit-bot: I haz the power, 2017-01-30 19:02:29]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/v8/v8/+/c0f255f0756430eec913560b25aa6659480...