ART: Add non-temporal store support

Added non-temporal store support as a hint from the ME.
Added the implementation of the memory barrier
extended instruction that supports non-temporal stores
by explicitly serializing all previous store-to-memory instructions.

Change-Id: I8205a92083f9725253d8ce893671a133a0b6849d
Signed-off-by: Jean Christophe Beyler <jean.christophe.beyler@intel.com>
Signed-off-by: Chao-ying Fu <chao-ying.fu@intel.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/compiler/dex/compiler_enums.h b/compiler/dex/compiler_enums.h
index 47cb4245d7..5263b8de7e 100644
--- a/compiler/dex/compiler_enums.h
+++ b/compiler/dex/compiler_enums.h
@@ -234,6 +234,10 @@ enum ExtendedMIROpcode {
   // @note: All currently reserved vector registers are returned to the temporary pool.
   kMirOpReturnVectorRegisters,
 
+  // @brief Create a memory barrier.
+  // vA: a constant defined by enum MemBarrierKind.
+  kMirOpMemBarrier,
+
   kMirOpLast,
 };
 
@@ -249,6 +253,7 @@ enum MIROptimizationFlagPositions {
   kMIRIgnoreSuspendCheck,
   kMIRDup,
   kMIRMark,                           // Temporary node mark.
+  kMIRStoreNonTemporal,
   kMIRLastMIRFlag,
 };
 
@@ -453,12 +458,15 @@ std::ostream& operator<<(std::ostream& os, const DividePattern& pattern);
  * -# Use LoadAny barrier ~= (LoadLoad | LoadStore) ~= acquire barrierafter each volatile load.
  * -# Use StoreStore barrier after all stores but before return from any constructor whose
  *    class has final fields.
+ * -# Use NTStoreStore to order non-temporal stores with respect to all later
+ *    store-to-memory instructions.  Only generated together with non-temporal stores.
  */
 enum MemBarrierKind {
   kAnyStore,
   kLoadAny,
   kStoreStore,
-  kAnyAny
+  kAnyAny,
+  kNTStoreStore,
 };
 
 std::ostream& operator<<(std::ostream& os, const MemBarrierKind& kind);