Fixed computed output shape of matmul op

Author: mingmingtasd

src/webnn/native/ops/Binary.cpp

@@ -54,17 +54,19 @@ namespace webnn::native::op {
             }
             outputShape = {1};
         }
-        if (rankA == 2 && rankB == 1) {
-            if (inputShapeA[1] != inputShapeB[0]) {
+        if (rankA >= 2 && rankB == 1) {
+            if (inputShapeA[rankA - 1] != inputShapeB[0]) {
                 return DAWN_VALIDATION_ERROR("The input shapes are incompatible.");
             }
-            outputShape = {inputShapeA[0], 1};
+            outputShape = std::move(inputShapeA);
+            outputShape[rankA - 1] = 1;
         }
-        if (rankA == 1 && rankB == 2) {
-            if (inputShapeA[0] != inputShapeB[0]) {
+        if (rankA == 1 && rankB >= 2) {
+            if (inputShapeA[0] != inputShapeB[rankB - 2]) {
                 return DAWN_VALIDATION_ERROR("The input shapes are incompatible.");
             }
-            outputShape = {1, inputShapeB[1]};
+            outputShape = std::move(inputShapeB);
+            outputShape[rankB - 2] = 1;
         }
         if (rankA >= 2 && rankB >= 2) {
             if (inputShapeA[rankA - 1] != inputShapeB[rankB - 2]) {