[turbofan] Add the RoundInt32ToFloat32 operator to turbofan.

[turbofan] Add the RoundInt32ToFloat32 operator to turbofan.

The new operator converts an int32 input to float32. If the input cannot
be represented exactly in float32, the value is rounded using the
round-ties-even rounding mode (the default rounding mode).

I provide implementations of the new operator for x64, ia32, arm, arm64,
mips, mips64, ppc, and ppc64.

R=titzer@chromium.org, v8-arm-ports@googlegroups.com, v8-mips-ports@googlegroups.com, v8-ppc-ports@googlegroups.com

Committed: https://crrev.com/e06f7d784e7a6f948ecc02ff1725578b9e9f0bda
Cr-Commit-Position: refs/heads/master@{#33347}

[titzer, 2016-01-15 15:44:39]

On 2016/01/15 14:18:56, ahaas wrote:

lgtm

[ahaas, 2016-01-16 08:04:33]

The CQ bit was checked by ahaas@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-01-16 08:04:44]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1589363002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1589363002/1

[commit-bot: I haz the power, 2016-01-16 11:40:38]

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

[commit-bot: I haz the power, 2016-01-16 11:40:45]

Dry run: This issue passed the CQ dry run.

[ahaas, 2016-01-16 13:10:08]

The CQ bit was checked by ahaas@chromium.org

[commit-bot: I haz the power, 2016-01-16 13:10:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1589363002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1589363002/1

[commit-bot: I haz the power, 2016-01-16 13:11:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-16 13:12:25]

Description was changed from

==========
[turbofan] Add the RoundInt32ToFloat32 operator to turbofan.

The new operator converts an int32 input to float32. If the input cannot
be represented exactly in float32, the value is rounded using the
round-ties-even rounding mode (the default rounding mode).

I provide implementations of the new operator for x64, ia32, arm, arm64,
mips, mips64, ppc, and ppc64.

R=titzer@chromium.org, v8-arm-ports@googlegroups.com,
v8-mips-ports@googlegroups.com, v8-ppc-ports@googlegroups.com
==========

to

==========
[turbofan] Add the RoundInt32ToFloat32 operator to turbofan.

The new operator converts an int32 input to float32. If the input cannot
be represented exactly in float32, the value is rounded using the
round-ties-even rounding mode (the default rounding mode).

I provide implementations of the new operator for x64, ia32, arm, arm64,
mips, mips64, ppc, and ppc64.

R=titzer@chromium.org, v8-arm-ports@googlegroups.com,
v8-mips-ports@googlegroups.com, v8-ppc-ports@googlegroups.com

Committed: https://crrev.com/e06f7d784e7a6f948ecc02ff1725578b9e9f0bda
Cr-Commit-Position: refs/heads/master@{#33347}
==========

[commit-bot: I haz the power, 2016-01-16 13:12:26]

Patchset 1 (id:??) landed as
https://crrev.com/e06f7d784e7a6f948ecc02ff1725578b9e9f0bda
Cr-Commit-Position: refs/heads/master@{#33347}