hg: hsx/hotspot-gc/hotspot: 7068625: Testing 8 bytes of card table entries at a time speeds up card-scanning

[bengt.rutisson at oracle.com]

Changeset: c7a555a9449a
Author:    brutisso
Date:      2012-03-14 12:49 +0100
URL:       http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/c7a555a9449a

7068625: Testing 8 bytes of card table entries at a time speeds up card-scanning
Summary: Check clean words instead of clean bytes
Reviewed-by: jcoomes, jmasa, jwilhelm, ysr
Contributed-by: alexey.ragozin at gmail.com

! src/share/vm/memory/cardTableModRefBS.hpp
! src/share/vm/memory/cardTableRS.cpp
! src/share/vm/memory/cardTableRS.hpp