tree c50b54bf82f457f44dbf0741947d836749d4a96a
parent 7cd230c8f74a227ea04f1dd93c8d855aa81fc1fe
author Roland Levillain <rpl@google.com> 1450176936 +0000
committer Roland Levillain <rpl@google.com> 1450179956 +0000

x86 Baker's read barrier fast path implementation.

Introduce an x86 fast path implementation in Optimizing for
Baker's read barriers (for both heap reference loads and GC
root loads).  The marking phase of the read barrier is
performed by a slow path, invoking a new runtime entry point
(artReadBarrierMark).

Other read barrier algorithms continue to use the original
slow path based implementation, which has been renamed as
GenerateReadBarrierSlow/GenerateReadBarrierForRootSlow.

Bug: 12687968
Change-Id: Ie610c4befc19ff22378a8cba38b422dcacb54320