change the thread-payload address mask to 0xFFFFFFC0

Author: Gang Y Chen

visa/Optimizer.cpp

@@ -7948,11 +7948,11 @@ bool Optimizer::foldPseudoAndOr(G4_BB* bb, INST_LIST_ITER& ii)
             instBuffer.push_back(addInst);
         };
 
-        // (W) and (1) r127.2<1>:ud r0.0<0;1,0>:ud 0xFFFFFFE0
+        // (W) and (1) r127.2<1>:ud r0.0<0;1,0>:ud 0xFFFFFFC0
         auto getStartAddrInst = [this, &instBuffer, r0, rtail](int subreg)
         {
-            // (W) and (1) r127.2<1>:ud r0.0<0;1,0>:ud 0xFFFFFFE0
-            uint32_t GRFMask = 0x1F;
+            // (W) and (1) r127.2<1>:ud r0.0<0;1,0>:ud 0xFFFFFFC0
+            uint32_t GRFMask = 0x3F;
             auto src0 = builder.createSrc(r0->getRegVar(), 0, 0,
                 builder.getRegionScalar(), Type_UD);
             auto src1 = builder.createImm(~GRFMask, Type_UD);
@@ -8017,7 +8017,7 @@ bool Optimizer::foldPseudoAndOr(G4_BB* bb, INST_LIST_ITER& ii)
 
             // compute per-thread starting address (r127.2)
             // (W) mov (8) r127.0:ud 0x0
-            // (W) and (1) r127.2<1>:ud r0.0<0;1,0>:ud 0xFFFFFFE0   // start address
+            // (W) and (1) r127.2<1>:ud r0.0<0;1,0>:ud 0xFFFFFFC0   // start address
             // (W) and (1) r127.0:uw r0.4:uw(tid) 0xFF  // tid
             // (W) add (1) r127.2 r127.2 cross_thread_size
             // (W) mad (1) r127.2 r127.2 r127.0 per_thread_size