diff --git a/include/bang/bang_gencode.h b/include/bang/bang_gencode.h
index 7bd0b3a6..5e282183 100644
--- a/include/bang/bang_gencode.h
+++ b/include/bang/bang_gencode.h
@@ -7,6 +7,8 @@ namespace infini {
 class BangGenCode {
   private:
     int64_t nram_size = 589824;
+    int64_t deal_size;
+    int64_t deal_size_align;
   public:
     std::string genHead() {
       std::string temp = "#include <bang.h>\n";
@@ -14,15 +16,77 @@ class BangGenCode {
       return temp;
     }
     std::string genNramSplit(int64_t num) {
-      int64_t deal_size = nram_size / (num + 1);
-      int64_t deal_size_align = ((deal_size) / (64) * (64));
+      deal_size = nram_size / (num + 1);
+      deal_size_align = ((deal_size) / (64) * (64));
       std::string temp = "";
       for(int64_t i = 0; i < num; ++i) {
-        temp += "__nram__ char nram_buffer" + std::to_string(i) + "[" + std::to_string(deal_size_align) + "]\n"; 
+        temp += "__nram__ char nram_buffer" + std::to_string(i) + "[" + std::to_string(deal_size_align) + "];\n"; 
       }
-      temp += "__nram__ char nram_buffer_output[" + std::to_string(deal_size_align) + "]\n"; 
+      temp += "__nram__ char nram_buffer_output[" + std::to_string(deal_size_align) + "];\n"; 
+      return temp;
     }
-    return temp;
+    std::string genFunctionHead(std::vector<std::string> inputs, std::string output) {
+      std::string temp = "";
+      temp += "template<typename T>;\n";
+      temp += "__mlu_device__ void FusionFunction(";
+      temp += "T*" + output + ",\n";
+      for(int64_t i = 0; i < inputs.size(); ++i) {
+        temp += "T*" + inputs[i] + ",\n";
+      }
+      temp += "int64_t taskNum) {\n";
+      return temp;
+    }
+    std::string genFunctionEnd() {
+      return "}\n";
+    }
+    std::string genTaskCycle(int64_t taskNum, int64_t workerNum) {
+      int64_t num_per_core = taskNum / workerNum;
+      int64_t num_rem = taskNum % workerNum;
+      int64_t easy_job = num_per_core;
+      int64_t hard_job = num_per_core + ( num_rem != 0 ? 1 : 0);
+      std::string temp = "";
+      temp += "int64_t my_job = taskId < " + std::to_string(num_rem) + " ? " + std::to_string(hard_job) + " : " + std::to_string(easy_job) + ";\n";
+      temp += "int64_t start = ( taskId <= " + std::to_string(num_rem) + " ) ? ( taskId *" + std::to_string(hard_job) + " )\n";
+      temp += ": ( " + std::to_string(num_rem) + " * " + std::to_string(hard_job) + " + ( taskId - " + std::to_string(num_rem) + ") * " + std::to_string(easy_job) + ");\n";
+      return temp;
+    }
+    std::string genOffset(std::vector<std::string> inputs, std::string output) {
+      std::string temp = "";
+      for(auto i = 0; i < inputs.size(); ++i) {
+        temp += "char *" + inputs[i] + "_start = (char*)" + inputs[i] + "start * sizeof(T);\n";
+      }
+      temp += "char *" + output + "_start = (char*)" + inputs[i] + "start * sizeof(T);\n";
+      return temp;
+    }
+    std::string compute(std::vector<std::string> inputs, std::string output, std::vector<std::string> compute, std::string size) {
+      std::string temp = "";
+      for(int i = 0; i < inputs.size(); ++i) {
+        temp += "__memcpy(nram_buffer" + std::to_string(i) + ", " + inputs + "_start, " + size + ", GDRAM2NRAM);\n";
+      }
+      ////////////////////////////////////////
+      // Compute
+      ////////////////////////////////////////
+      temp += "__memcpy(" + output + "_start, nram_buffer_output, " + size + ", NRAM2GDRAM);\n"; 
+      for(int i = 0; i < inputs.size(); ++i) {
+        temp += inputs[i] + "_start += " + std::to_string(deal_size_align) + ";\n"; 
+      }
+      temp += output + "_start += " + std::to_string(deal_size_align) + ";\n";
+      return temp;
+    }
+    std::string genKernelCycle() {
+      std::string temp = "";
+      temp += "int64_t deal_num_align = " + std::to_string(deal_size_align) + " / sizeof(T);\n";
+      temp += "int64_t repeat = my_job / deal_num_align;\n";
+      temp += "int64_t rem = my_job % deal_num_align;\n";
+      temp += "for(int i = 0; i < repeat; ++i) {;\n";
+      temp += compute(std::to_string(deal_size_align)); 
+      temp += "}\n";
+      temp += "if(rem){;\n";
+      temp += compute("rem * sizeof(T)"); 
+      temp += "}\n";
+      return temp;
+    }
+
     std::string genElementwiseFusion() {
     }
 }