[turbofan] Add the TruncateFloat32ToInt32 operator to turbofan.

[turbofan] Add the TruncateFloat32ToInt32 operator to turbofan.

The new operator converts a float32 input to int32 through truncation.
I provide implementations of the new operator for x64, ia32, arm,
arm64, mips, mips64, and x87. @v8-ppc-ports, can you please take care
of the ppc implementation?

R=titzer@chromium.org, v8-arm-ports@googlegroups.com, v8-mips-ports@googlegroups.com, weiliang.lin@intel.com

Committed: https://crrev.com/fc53eed14b2366ceb24b1ad1da5d70533a1e7830
Cr-Commit-Position: refs/heads/master@{#33346}

[titzer, 2016-01-15 12:39:27]

lgtm other than one small bug

https://codereview.chromium.org/1583323004/diff/1/src/compiler/instruction-se...
File src/compiler/instruction-selector.cc (right):

https://codereview.chromium.org/1583323004/diff/1/src/compiler/instruction-se...
src/compiler/instruction-selector.cc:960: return MarkAsWord64(node),
VisitTruncateFloat32ToInt32(node);
s/Word64/Word32/

[ahaas, 2016-01-15 12:52:17]

https://codereview.chromium.org/1583323004/diff/1/src/compiler/instruction-se...
File src/compiler/instruction-selector.cc (right):

https://codereview.chromium.org/1583323004/diff/1/src/compiler/instruction-se...
src/compiler/instruction-selector.cc:960: return MarkAsWord64(node),
VisitTruncateFloat32ToInt32(node);
On 2016/01/15 at 12:39:27, titzer wrote:
> s/Word64/Word32/

Done.

[ahaas, 2016-01-16 08:02:32]

The CQ bit was checked by ahaas@chromium.org

[ahaas, 2016-01-16 08:02:32]

The patchset sent to the CQ was uploaded after l-g-t-m from titzer@chromium.org
Link to the patchset: https://codereview.chromium.org/1583323004/#ps30001
(title: "Fixed a small bug")

[commit-bot: I haz the power, 2016-01-16 08:02:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1583323004/30001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1583323004/30001

[commit-bot: I haz the power, 2016-01-16 11:40:54]

Committed patchset #3 (id:30001)

[commit-bot: I haz the power, 2016-01-16 11:41:38]

Description was changed from

==========
[turbofan] Add the TruncateFloat32ToInt32 operator to turbofan.

The new operator converts a float32 input to int32 through truncation.
I provide implementations of the new operator for x64, ia32, arm,
arm64, mips, mips64, and x87. @v8-ppc-ports, can you please take care
of the ppc implementation?

R=titzer@chromium.org, v8-arm-ports@googlegroups.com,
v8-mips-ports@googlegroups.com, weiliang.lin@intel.com
==========

to

==========
[turbofan] Add the TruncateFloat32ToInt32 operator to turbofan.

The new operator converts a float32 input to int32 through truncation.
I provide implementations of the new operator for x64, ia32, arm,
arm64, mips, mips64, and x87. @v8-ppc-ports, can you please take care
of the ppc implementation?

R=titzer@chromium.org, v8-arm-ports@googlegroups.com,
v8-mips-ports@googlegroups.com, weiliang.lin@intel.com

Committed: https://crrev.com/fc53eed14b2366ceb24b1ad1da5d70533a1e7830
Cr-Commit-Position: refs/heads/master@{#33346}
==========

[commit-bot: I haz the power, 2016-01-16 11:41:39]

Patchset 3 (id:??) landed as
https://crrev.com/fc53eed14b2366ceb24b1ad1da5d70533a1e7830
Cr-Commit-Position: refs/heads/master@{#33346}