Add element op (#1259)

include/ck/tensor_operation/gpu/element/element_wise_operation.hpp

@@ -528,6 +528,26 @@ struct UnaryTypeConvert<ck::bhalf_t, float>
     }
 };
 
+struct ConvInvscale
+{
+    /// @brief Op to multiply convolution results by inverted scale factors
+    /// @param e Output after scaling
+    /// @param c Convolution result
+    /// @param d0 Input scale factor
+    /// @param d1 Weights scale factor
+    /// @param d2 Output scale factor
+    template <typename E, typename C, typename D0, typename D1, typename D2>
+    __host__ __device__ void
+    operator()(E& e, const C& c, const D0& d0, const D1& d1, const D2& d2) const;
+
+    template <>
+    __host__ __device__ void operator()<f8_t, float, float, float, float>(
+        f8_t& e, const float& c, const float& d0, const float& d1, const float& d2) const
+    {
+        e = type_convert<f8_t>(c / d0 / d1 / d2);
+    };
+};
+
 } // namespace element_wise
 } // namespace tensor_operation
 } // namespace ck