deepSwap

paddle/math/BaseMatrix.cu

@@ -1240,6 +1240,12 @@ void BaseMatrixT<T>::assignAtOffset(BaseMatrixT& b, int64_t columnOffset) {
   }
 }
 
+DEFINE_MATRIX_BINARY_OP(DeepSwap, T tmp = a; a = b; b = tmp);
+template<class T>
+void BaseMatrixT<T>::deepSwap(BaseMatrixT& b) {
+    applyBinary(binary::DeepSwap<T>(), b);
+}
+
 template<>
 void BaseMatrixT<real>::rowDotMul(size_t destCol,
                                   BaseMatrixT& b,

paddle/math/BaseMatrix.h

@@ -455,6 +455,13 @@ public:
    */
   void assign(T p);
 
+  /**
+   * @code
+   * swap(this, b)
+   * @endcode
+   */
+  void deepSwap(BaseMatrixT& b);
+
   /**
    * @code
    * this = this + p