bug fixes

source/tensor/core/arithmetic/Div.cpp

@@ -147,6 +147,8 @@ int GetDivDimIndex(const XTensor &a, const XTensor &b)
 {
     if(a.order < b.order)
         return -1;
+    if(XTensor::IsSameShaped(&a, &b))
+        return -1;
 
     int hitCount = 0;
     int hitDim = -1;

source/tensor/core/arithmetic/Multiply.cpp

@@ -148,6 +148,8 @@ int GetMultiplyDimIndex(const XTensor &a, const XTensor &b)
 {
     if(a.order < b.order)
         return -1;
+    if(XTensor::IsSameShaped(&a, &b))
+        return -1;
 
     int hitCount = 0;
     int hitDim = -1;

source/tensor/core/arithmetic/Sub.cpp

@@ -134,6 +134,8 @@ int GetSubDimIndex(const XTensor &a, const XTensor &b)
 {
     if(a.order < b.order)
         return -1;
+    if(XTensor::IsSameShaped(&a, &b))
+        return -1;
 
     int hitCount = 0;
     int hitDim = -1;

source/tensor/core/arithmetic/Sum.cpp

@@ -139,6 +139,8 @@ int GetSumDimIndex(const XTensor &a, const XTensor &b)
 {
     if(a.order < b.order)
         return -1;
+    if(XTensor::IsSameShaped(&a, &b))
+        return -1;
 
     int hitCount = 0;
     int hitDim = -1;