O3: Tighten memory order violation checking to 16 bytes.

The comment in the code suggests that the checking granularity should be 16
bytes, however in reality the shift by 8 is 256 bytes which seems much
larger than required.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/cpu/o3/lsq_unit.hh b/src/cpu/o3/lsq_unit.hh
index 2bb42cadc..bdc524dec 100644
--- a/src/cpu/o3/lsq_unit.hh
+++ b/src/cpu/o3/lsq_unit.hh
@@ -111,6 +111,12 @@ class LSQUnit {
     /** Inserts a store instruction. */
     void insertStore(DynInstPtr &store_inst);
 
+    /** Check for ordering violations in the LSQ
+     * @param load_idx index to start checking at
+     * @param inst the instruction to check
+     */
+    Fault checkViolations(int load_idx, DynInstPtr &inst);
+
     /** Executes a load instruction. */
     Fault executeLoad(DynInstPtr &inst);
 
@@ -366,6 +372,14 @@ class LSQUnit {
      */
     unsigned SQEntries;
 
+    /** The number of places to shift addresses in the LSQ before checking
+     * for dependency violations
+     */
+    unsigned depCheckShift;
+
+    /** Should loads be checked for dependency issues */
+    bool checkLoads;
+
     /** The number of load instructions in the LQ. */
     int loads;
     /** The number of store instructions in the SQ. */