tree b23deeac343fa58a23d8eb94626ced542d1027c8
parent 508751c5b1dc50f519d63c6d35dafef080180a8a
author Aart Bik <ajcbik@google.com> 1533923304 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1533923304 +0000

[vm/compiler] "fast"-path for x64 division

Rationale:
Since 64-bit division requires twice as many cycles
and has much higher latency compared to the 32-bit
division, even for a non-speculative 64-bit path,
a 32-bit "fast path" makes sense.

Speedup:
About 2x for cases that fit 32-bits. No noticable
slowdown for the 64-bit cases.

https://github.com/flutter/flutter/issues/19677
https://github.com/dart-lang/sdk/issues/33967

Change-Id: I0d3b44564fee2cda03fc36f089a4424084732de0
Reviewed-on: https://dart-review.googlesource.com/69200
Commit-Queue: Aart Bik <ajcbik@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>