remove the ugly code matmul_int8.

src/operators/kernel/central-arm-func/conv_add_relu_int8_arm_func.h

@@ -113,8 +113,8 @@ void ConvAddReluInt8Compute(const FusionConvAddReluInt8Param<CPU> &param) {
       Tensor out_slice = out_batch.Slice(g * out_step, (g + 1) * out_step);
       Tensor filter_slice = filter.Slice(g * out_step, (g + 1) * out_step);
 
-      math::matmul_int8(filter_slice, false, col_matrix, false, scale_v,
-                        &out_slice, static_cast<float>(0), true, biase_data);
+      math::matmul(filter_slice, false, col_matrix, false, scale_v, &out_slice,
+                   static_cast<float>(0), true, biase_data);
     }
   }
 }

src/operators/kernel/central-arm-func/conv_arm_func.h

@@ -108,13 +108,13 @@ inline void GemmConv(const ConvParam<CPU> &param) {
       Tensor filter_slice = filter.Slice(g * out_step, (g + 1) * out_step);
 
       if (param.Input()->type() == typeid(int8_t)) {
-        math::matmul_int8(filter_slice, false, col_matrix, false,
-                          static_cast<float>(1), &out_slice,
-                          static_cast<float>(0));
+        math::matmul(filter_slice, false, col_matrix, false,
+                     static_cast<float>(1), &out_slice, static_cast<float>(0),
+                     false, static_cast<int32_t *>(nullptr));
       } else {
-        math::matmul<float>(filter_slice, false, col_matrix, false,
-                            static_cast<float>(1), &out_slice,
-                            static_cast<float>(0));
+        math::matmul(filter_slice, false, col_matrix, false,
+                     static_cast<float>(1), &out_slice, static_cast<float>(0),
+                     false, static_cast<float *>(nullptr));
       }
     }
   }

src/operators/kernel/central-arm-func/mul_arm_func.h

@@ -73,13 +73,13 @@ void MulCompute(const MulParam<CPU> &param) {
   }
   if (param.InputX()->type() == typeid(int8_t)) {
     out->mutable_data<int32_t>();
-    math::matmul_int8(x_matrix, false, y_matrix, false, static_cast<float>(1),
-                      out, static_cast<float>(0));
+    math::matmul(x_matrix, false, y_matrix, false, static_cast<float>(1), out,
+                 static_cast<float>(0), false, static_cast<int32_t *>(nullptr));
 
   } else {
     out->mutable_data<float>();
-    math::matmul<float>(x_matrix, false, y_matrix, false, static_cast<float>(1),
-                        out, static_cast<float>(0));
+    math::matmul(x_matrix, false, y_matrix, false, static_cast<float>(1), out,
+                 static_cast<float>(0), false, static_cast<float *>(nullptr));
   }
   if (out_dim.size() != 2) {
     out->Resize(out_dim);

src/operators/math/math_function.h

@@ -30,10 +30,11 @@ void matmul(const framework::Tensor &matrix_a, bool trans_a,
             framework::Tensor *matrix_out, T beta, bool relu = false,
             float *bias = nullptr);
 
-void matmul_int8(const framework::Tensor &matrix_a, bool trans_a,
-                 const framework::Tensor &matrix_b, bool trans_b, float alpha,
-                 framework::Tensor *matrix_out, float beta, bool relu = false,
-                 int32_t *bias = nullptr);
+template <typename T, typename S>
+void matmul(const framework::Tensor &matrix_a, bool trans_a,
+            const framework::Tensor &matrix_b, bool trans_b, T alpha,
+            framework::Tensor *matrix_out, T beta, bool relu = false,
+            S *bias = nullptr);
 
 template <typename T>
 void matmulWithBn(const framework::Tensor &matrix_a, bool trans_a,

src/operators/math/math_function_int8.cpp

@@ -20,7 +20,9 @@ limitations under the License. */
 namespace paddle_mobile {
 namespace operators {
 namespace math {
-void matmul_int8(const framework::Tensor &matrix_a, bool trans_a,
+
+template <>
+void matmul(const framework::Tensor &matrix_a, bool trans_a,
             const framework::Tensor &matrix_b, bool trans_b, float alpha,
             framework::Tensor *matrix_out, float beta, bool relu,
             int32_t *bias) {

test/common/test_gemm_perf.cpp

@@ -85,16 +85,16 @@ int main() {
   // int8_t without bias
   // warm-up 10 times
   for (int j = 0; j < 10; ++j) {
-    paddle_mobile::operators::math::matmul_int8(
+    paddle_mobile::operators::math::matmul(
         aa_int8, false, bb_int8, false, static_cast<float>(1), &cc_int32,
-        static_cast<float>(0), false, nullptr);
+        static_cast<float>(0), false, static_cast<int32_t*>(nullptr));
   }
 
   auto time3 = time();
   for (int j = 0; j < 10; ++j) {
-    paddle_mobile::operators::math::matmul_int8(
+    paddle_mobile::operators::math::matmul(
         aa_int8, false, bb_int8, false, static_cast<float>(1), &cc_int32,
-        static_cast<float>(0), false, nullptr);
+        static_cast<float>(0), false, static_cast<int32_t*>(nullptr));
   }
   auto time4 = time();
   std::cout << "int8_t gemm  cost :" << time_diff(time3, time4) / 10 << "ms\n";
@@ -102,15 +102,15 @@ int main() {
   // int8_t with bias&relu
   // warm-up 10 times
   for (int j = 0; j < 10; ++j) {
-    paddle_mobile::operators::math::matmul_int8(
+    paddle_mobile::operators::math::matmul(
         aa_int8, false, bb_int8, false, static_cast<float>(0.618), &cc_int8,
-        static_cast<float>(0), true, &bias_data[0]);
+        static_cast<float>(0), true, bias_data);
   }
   auto time5 = time();
   for (int j = 0; j < 10; ++j) {
-    paddle_mobile::operators::math::matmul_int8(
+    paddle_mobile::operators::math::matmul(
         aa_int8, false, bb_int8, false, static_cast<float>(0.618), &cc_int8,
-        static_cast<float>(0), true, &bias_data[0]);
+        static_cast<float>(0), true, bias_data);
   }
   auto time6 = time();
   std::cout << "int8_t gemm_with_bias_relu cost :"