[simdjs] Update spec version to 0.8.4

[simdjs] Update spec version to 0.8.4

Merge ShiftRightArithmetic and ShiftRightLogical Functions.

BUG=v8:4124
LOG=Y

Committed: https://crrev.com/a633a38f08c937404574f9553c649ba6503e5f01
Cr-Commit-Position: refs/heads/master@{#30812}

[gdeepti1, 2015-09-16 18:24:23]

gdeepti@google.com changed reviewers:
+ bbudge@chromium.org, bmeurer@chromium.org, littledan@chromium.org

[bbudge, 2015-09-16 20:25:36]

https://codereview.chromium.org/1351663002/diff/1/src/runtime/runtime-simd.cc
File src/runtime/runtime-simd.cc (right):

https://codereview.chromium.org/1351663002/diff/1/src/runtime/runtime-simd.cc...
src/runtime/runtime-simd.cc:461: #define SIMD_LSR_FUNCTION(type, lane_type,
lane_bits, lane_count)        \
It's a little misleading to have the logical and arithmetic shifts in one macro.
I think it would be better to define separate LSR and ASR macros, but give them
the same name:

Runtime_##type##ShiftRightByScalar

[gdeepti1, 2015-09-16 20:42:08]

https://codereview.chromium.org/1351663002/diff/1/src/runtime/runtime-simd.cc
File src/runtime/runtime-simd.cc (right):

https://codereview.chromium.org/1351663002/diff/1/src/runtime/runtime-simd.cc...
src/runtime/runtime-simd.cc:461: #define SIMD_LSR_FUNCTION(type, lane_type,
lane_bits, lane_count)        \
On 2015/09/16 20:25:36, bbudge wrote:
> It's a little misleading to have the logical and arithmetic shifts in one
macro.
> I think it would be better to define separate LSR and ASR macros, but give
them
> the same name:
> 
> Runtime_##type##ShiftRightByScalar

Done.

[bbudge, 2015-09-16 20:43:49]

LGTM thanks for doing this!

[Benedikt Meurer, 2015-09-17 03:52:51]

lgtm

[gdeepti1, 2015-09-17 17:29:58]

The CQ bit was checked by gdeepti@google.com

[commit-bot: I haz the power, 2015-09-17 17:30:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1351663002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1351663002/20001

[commit-bot: I haz the power, 2015-09-17 17:54:52]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-17 17:55:11]

Patchset 2 (id:??) landed as
https://crrev.com/a633a38f08c937404574f9553c649ba6503e5f01
Cr-Commit-Position: refs/heads/master@{#30812}