Fix a bug in HWConformity for mad with mixed byte and

word type source operands.

For mad with mixed byte and word type source operands, HWConformity fix
should insert mov instruction to convert the byte type operand to word
type temp.

visa/HWConformity.cpp

@@ -4230,6 +4230,8 @@ bool HWConformity::generateAlign1Mad(G4_BB *bb, INST_LIST_ITER iter) {
 
   // check src
   bool canBeImm = true;
+  bool anyByteSrc = false;
+  bool allByteSrc = true;
   for (int k = inst->getNumSrc() - 1; k >= 0; k--) {
     G4_Operand *src = inst->getSrc(k);
     if (!isGoodAlign1TernarySrc(inst, k, canBeImm)) {
@@ -4279,6 +4281,23 @@ bool HWConformity::generateAlign1Mad(G4_BB *bb, INST_LIST_ITER iter) {
         canBeImm = false;
       }
     }
+    if (IS_BTYPE(inst->getSrc(k)->getType())) {
+      anyByteSrc = true;
+    }
+    else {
+      allByteSrc = false;
+    }
+  }
+
+  if (anyByteSrc && !(allByteSrc && IS_WTYPE(inst->getDst()->getType()))) {
+    for (int k = inst->getNumSrc() - 1; k >= 0; k--) {
+      G4_Operand *src = inst->getSrc(k);
+      G4_Type srcType = src->getType();
+      if (IS_BTYPE(srcType)) {
+        G4_Type newSrcType = IS_UNSIGNED_INT(srcType) ? Type_UW : Type_W;
+        inst->setSrc(insertMovBefore(iter, k, newSrcType, bb), k);
+      }
+    }
   }
 
   inst->setOpcode(G4_mad);