diff --git a/src/operators/math/pool_3x3.cpp b/src/operators/math/pool_3x3.cpp
index 05d3017f635a040a52d2cc377c8f384dbbd8086c..f8b52c59f5689461ef9b4171b9e33c0d49529eed 100644
--- a/src/operators/math/pool_3x3.cpp
+++ b/src/operators/math/pool_3x3.cpp
@@ -31,186 +31,43 @@ using std::min;
 using std::vector;
 void Pool3x3Avgs1p1(const Tensor *input, Tensor *output) {
 #if __ARM_NEON
-  const int batch_size = input->dims()[0];
+  const int batch_size = static_cast<int>(input->dims()[0]);
+  const int input_channel = static_cast<int>(input->dims()[1]);
 
-  const int h_in = input->dims()[2];
+  const int input_height = static_cast<int>(input->dims()[2]);
+  const int input_width = static_cast<int>(input->dims()[3]);
+  const int output_height = static_cast<int>(output->dims()[2]);
+  const int output_width = static_cast<int>(output->dims()[3]);
 
-  const int w_in = input->dims()[3];
-
-  const int output_channels = output->dims()[1];
+  const int hxw = input_height * input_width;
 
-  const int h_out = output->dims()[2];
-  const int w_out = output->dims()[3];
-  const int outputdata_channel_stride = h_out * w_out;
-  const int inputdata_channel_stride = h_in * w_in;
-  const int input_batch_stride = output_channels * inputdata_channel_stride;
-  const int output_batch_stride = output_channels * outputdata_channel_stride;
-  float *out_data = output->data<float>();
-  const float *input_data = input->data<float>();
+  const int l = input_height;
 
   const float coef = 1.0 / 9.0;
-  for (int k = 0; k < batch_size; ++k) {
-#pragma omp parallel for
-    for (int c = 0; c < output_channels; ++c) {
-      const float *input_seg = input_data + c * inputdata_channel_stride;
-      float *output_seg = out_data + c * outputdata_channel_stride;
-      // four corner point
-      output_seg[0] = (input_seg[0] + input_seg[1] + input_seg[w_in] +
-                       input_seg[w_in + 1]) *
-                      coef;
-      output_seg[w_out - 1] =
-          (input_seg[w_in - 2] + input_seg[w_in - 1] + input_seg[w_in * 2 - 2] +
-           input_seg[2 * w_in - 1]) *
-          coef;
-      output_seg[(h_out - 1) * w_out] =
-          (input_seg[(h_in - 2) * w_in] + input_seg[(h_in - 2) * w_in + 1] +
-           input_seg[(h_in - 1) * w_in] + input_seg[(h_in - 1) * w_in + 1]) *
-          coef;
-      output_seg[h_out * w_out - 1] =
-          (input_seg[h_in * w_in - 1] + input_seg[h_in * w_in - 2] +
-           input_seg[(h_in - 1) * w_in - 1] +
-           input_seg[(h_in - 1) * w_in - 2]) *
-          coef;
-      // left side & right side
-      for (int i = 1; i < h_in - 1; ++i) {
-        output_seg[i * w_out] =
-            (input_seg[i * w_in - w_in] + input_seg[i * w_in - w_in + 1] +
-             input_seg[i * w_in] + input_seg[i * w_in + 1] +
-             input_seg[i * w_in + w_in] + input_seg[i * w_in + w_in + 1]) *
-            coef;
-        output_seg[i * w_out + w_out - 1] =
-            (input_seg[i * w_in - w_in + w_in - 2] +
-             input_seg[i * w_in - w_in + 1 + w_in - 2] +
-             input_seg[i * w_in + w_in - 2] +
-             input_seg[i * w_in + 1 + w_in - 2] +
-             input_seg[i * w_in + w_in + w_in - 2] +
-             input_seg[i * w_in + w_in + 1 + w_in - 2]) *
-            coef;
-      }
-      // top 1 row & bottom 1 row
-      const float *input_tmp = input_seg;
-
-      float32x4_t in0, in1, in2, in3, in4, in5, in6, in7, tmp0, tmp1, tmp2,
-          tmp3, tmp4, tmp5, sum, out0;
-      float32x4_t v_coef = vdupq_n_f32(coef);
-      in0 = vld1q_f32(input_tmp);
-      in2 = vld1q_f32(input_tmp + w_in);
-      const float *input_tmp_end = input_tmp + (h_in - 2) * w_in;
-      in4 = vld1q_f32(input_tmp_end);
-      in6 = vld1q_f32(input_tmp_end + w_in);
-      int c_mid = w_out - 2;
-      auto output_ptr = output_seg + 1;
-      for (; c_mid > 3; c_mid -= 4) {
-        in1 = vld1q_f32(input_tmp + 4);
-        in3 = vld1q_f32(input_tmp + w_in + 4);
-
-        tmp0 = vextq_f32(in0, in1, 1);
-        tmp1 = vextq_f32(in0, in1, 2);
-
-        tmp2 = vextq_f32(in2, in3, 1);
-        tmp3 = vextq_f32(in2, in3, 2);
-
-        sum = vaddq_f32(in0, tmp0);
-        sum = vaddq_f32(sum, tmp1);
-        sum = vaddq_f32(sum, in2);
-        sum = vaddq_f32(sum, tmp2);
-        sum = vaddq_f32(sum, tmp3);
-
-        vst1q_f32(output_ptr, vmulq_f32(sum, v_coef));
-
-        in5 = vld1q_f32(input_tmp_end + 4);
-        in7 = vld1q_f32(input_tmp_end + w_in + 4);
-
-        tmp0 = vextq_f32(in4, in5, 1);
-        tmp1 = vextq_f32(in4, in5, 2);
-        tmp2 = vextq_f32(in6, in7, 1);
-        tmp3 = vextq_f32(in6, in7, 2);
-
-        sum = vaddq_f32(in0, tmp0);
-        sum = vaddq_f32(sum, tmp1);
-        sum = vaddq_f32(sum, in2);
-        sum = vaddq_f32(sum, tmp2);
-        sum = vaddq_f32(sum, tmp3);
-
-        vst1q_f32(output_ptr + (h_out - 1) * w_out, vmulq_f32(sum, v_coef));
-
-        // can optimize to each 8 stride.
-        input_tmp += 4;
-        input_tmp_end += 4;
-        output_ptr += 4;
-        in0 = in1;
-        in2 = in3;
-        in4 = in5;
-        in6 = in7;
-      }
-      // top right remain
-      float32x4_t pad0 = vdupq_n_f32(input_seg[w_in - 1]);
-      float32x4_t pad1 = vdupq_n_f32(input_seg[2 * w_in - 1]);
-
-      tmp0 = vextq_f32(in0, pad0, 1);
-      tmp1 = vextq_f32(in0, pad0, 2);
-      tmp2 = vextq_f32(in2, pad1, 2);
-      tmp3 = vextq_f32(in2, pad1, 2);
-
-      sum = vaddq_f32(in0, tmp0);
-      sum = vaddq_f32(sum, tmp1);
-      sum = vaddq_f32(sum, in2);
-      sum = vaddq_f32(sum, tmp2);
-      sum = vaddq_f32(sum, tmp3);
-      out0 = vmulq_f32(sum, v_coef);
-
-      for (int i = 0; i < c_mid; ++i) {
-        if (i == 0) {
-          vst1q_lane_f32(output_ptr + i, out0, 0);
-        }
-        if (i == 1) {
-          vst1q_lane_f32(output_ptr + i, out0, 1);
-        }
-        if (i == 2) {
-          vst1q_lane_f32(output_ptr + i, out0, 2);
-        }
-      }
-
-      // bottom_right remain
-      float32x4_t pad2 = vdupq_n_f32(input_seg[(h_in - 1) * w_in - 1]);
-      float32x4_t pad3 = vdupq_n_f32(input_seg[h_in * w_in - 1]);
-
-      tmp0 = vextq_f32(in4, pad2, 1);
-      tmp1 = vextq_f32(in4, pad2, 2);
-      tmp2 = vextq_f32(in6, pad3, 2);
-      tmp3 = vextq_f32(in6, pad3, 2);
-
-      sum = vaddq_f32(in4, tmp0);
-      sum = vaddq_f32(sum, tmp1);
-      sum = vaddq_f32(sum, in6);
-      sum = vaddq_f32(sum, tmp2);
-      sum = vaddq_f32(sum, tmp3);
-      out0 = vmulq_f32(sum, v_coef);
+  const float coef1 = 1.0 / 6.0;
+  const float coef2 = 1.0 / 4.0;
 
-      for (int i = 0; i < c_mid; ++i) {
-        if (i == 0) {
-          vst1q_lane_f32(output_ptr + (h_out - 1) * w_out + i, out0, 0);
-        }
-        if (i == 1) {
-          vst1q_lane_f32(output_ptr + (h_out - 1) * w_out + i, out0, 1);
-        }
-        if (i == 2) {
-          vst1q_lane_f32(output_ptr + (h_out - 1) * w_out + i, out0, 2);
-        }
-      }
-      // mid
-      for (int j = 0; j < h_out - 2; ++j) {
-        output_ptr = output_seg + w_out * (j + 1) + 1;
-        input_tmp = input_seg + j * w_in;
+  float32x4_t v_coef = vdupq_n_f32(coef);
+  float32x4_t v_coef1 = vdupq_n_f32(coef1);
 
-        in0 = vld1q_f32(input_tmp);
-        in2 = vld1q_f32(input_tmp + w_in);
-        in4 = vld1q_f32(input_tmp + 2 * w_in);
-        c_mid = w_out - 2;
-        for (; c_mid > 3; c_mid -= 4) {
-          in1 = vld1q_f32(input_tmp + 4);
-          in3 = vld1q_f32(input_tmp + w_in + 4);
-          in5 = vld1q_f32(input_tmp + 2 * w_in + 4);
+  for (int b = 0; b < batch_size; b++) {
+#pragma omp parallel for
+    for (int c = 0; c < input_channel; c++) {
+      const float *input_data = input->data<float>() + c * hxw;
+      float *output_data = output->data<float>() + c * hxw;
+
+      for (int i = 1; i < output_height - 1; i++) {
+        float *output_ptr;
+        float32x4_t in0, in1, in2, in3, in4, in5, tmp0, tmp1, tmp2, tmp3, tmp4,
+            tmp5, out0;
+        for (int m = 1; m < output_width - 4; m += 4) {
+          output_ptr = output_data + i * output_width + m;
+          in0 = vld1q_f32(input_data + (i - 1) * input_width + m - 1);
+          in1 = vld1q_f32(input_data + (i - 1) * input_width + m + 3);
+          in2 = vld1q_f32(input_data + i * input_width + m - 1);
+          in3 = vld1q_f32(input_data + i * input_width + m + 3);
+          in4 = vld1q_f32(input_data + (i + 1) * input_width + m - 1);
+          in5 = vld1q_f32(input_data + (i + 1) * input_width + m + 3);
 
           tmp0 = vextq_f32(in0, in1, 1);
           tmp1 = vextq_f32(in0, in1, 2);
@@ -219,63 +76,383 @@ void Pool3x3Avgs1p1(const Tensor *input, Tensor *output) {
           tmp4 = vextq_f32(in4, in5, 1);
           tmp5 = vextq_f32(in4, in5, 2);
 
-          sum = vaddq_f32(in0, tmp0);
-          sum = vaddq_f32(sum, tmp1);
-          sum = vaddq_f32(sum, in2);
-          sum = vaddq_f32(sum, tmp2);
-          sum = vaddq_f32(sum, tmp3);
-          sum = vaddq_f32(sum, in4);
-          sum = vaddq_f32(sum, tmp4);
-          sum = vaddq_f32(sum, tmp5);
-
-          out0 = vmulq_f32(sum, v_coef);
-          vst1q_f32(output_ptr, out0);
-          output_ptr += 4;
-          input_tmp += 4;
-          in0 = in1;
-          in2 = in3;
-          in4 = in5;
+          out0 = in0;
+          out0 = vaddq_f32(out0, tmp0);
+          out0 = vaddq_f32(out0, tmp1);
+          out0 = vaddq_f32(out0, in2);
+          out0 = vaddq_f32(out0, tmp2);
+          out0 = vaddq_f32(out0, tmp3);
+          out0 = vaddq_f32(out0, in4);
+          out0 = vaddq_f32(out0, tmp4);
+          out0 = vaddq_f32(out0, tmp5);
+
+          vst1q_f32(output_ptr, vmulq_f32(out0, v_coef));
+        }
+        int m;
+        for (m = 1; (m + 3) < output_width - 1; m = m + 4) {
         }
-        // mid remain
-        float32x4_t pad0 = vdupq_n_f32(input_seg[(j + 1) * w_in - 1]);
-        float32x4_t pad1 = vdupq_n_f32(input_seg[(j + 2) * w_in - 1]);
-        float32x4_t pad2 = vdupq_n_f32(input_seg[(j + 2) * w_in - 1]);
 
-        tmp0 = vextq_f32(in0, pad0, 1);
-        tmp1 = vextq_f32(in0, pad0, 2);
-        tmp2 = vextq_f32(in2, pad1, 1);
-        tmp3 = vextq_f32(in2, pad1, 2);
-        tmp4 = vextq_f32(in4, pad2, 1);
-        tmp5 = vextq_f32(in4, pad2, 2);
+        for (int j = m; j < output_width - 1; j++) {
+          output_data[i * output_width + j] =
+              input_data[(i - 1) * input_width + j - 1] +
+              input_data[(i - 1) * input_width + j] +
+              input_data[(i - 1) * input_width + j + 1] +
+              input_data[(i)*input_width + j - 1] +
+              input_data[(i)*input_width + j] +
+              input_data[(i)*input_width + j + 1] +
+              input_data[(i + 1) * input_width + j - 1] +
+              input_data[(i + 1) * input_width + j] +
+              input_data[(i + 1) * input_width + j + 1];
+          output_data[i * output_width + j] =
+              output_data[i * output_width + j] * coef;
+        }
+      }
 
-        sum = vaddq_f32(in0, tmp0);
-        sum = vaddq_f32(sum, tmp1);
-        sum = vaddq_f32(sum, in2);
-        sum = vaddq_f32(sum, tmp2);
-        sum = vaddq_f32(sum, tmp3);
-        sum = vaddq_f32(sum, in4);
-        sum = vaddq_f32(sum, tmp4);
-        sum = vaddq_f32(sum, tmp5);
-        out0 = vmulq_f32(sum, v_coef);
+      output_data[0] =
+          input_data[0] + input_data[1] + input_data[l] + input_data[l + 1];
+      output_data[l - 1] = input_data[l - 2] + input_data[l - 1] +
+                           input_data[2 * l - 2] + input_data[2 * l - 1];
+      output_data[(l - 1) * l] =
+          input_data[(l - 2) * l] + input_data[(l - 2) * l + 1] +
+          input_data[(l - 1) * l] + input_data[(l - 1) * l + 1];
+      output_data[l * l - 1] = input_data[(l - 2) * (l + 1)] +
+                               input_data[(l - 2) * (l + 1) + 1] +
+                               input_data[l * l - 2] + input_data[l * l - 1];
+      output_data[0] = output_data[0] * coef2;
+      output_data[l - 1] = output_data[l - 1] * coef2;
+      output_data[(l - 1) * l] = output_data[(l - 1) * l] * coef2;
+      output_data[l * l - 1] = output_data[l * l - 1] * coef2;
+
+      for (int i = 1; i < l - 1; ++i) {
+        output_data[i * l] = input_data[i * l - l] + input_data[i * l - l + 1] +
+                             input_data[i * l] + input_data[i * l + 1] +
+                             input_data[i * l + l] + input_data[i * l + l + 1];
+
+        output_data[i * l + l - 1] =
+            input_data[i * l + l - 1 - l - 1] + input_data[i * l + l - 1 - l] +
+            input_data[i * l + l - 1 - 1] + input_data[i * l + l - 1] +
+            input_data[i * l + l - 1 + l - 1] + input_data[i * l + l - 1 + l];
+        output_data[i * l] = output_data[i * l] * coef1;
+        output_data[i * l + l - 1] = output_data[i * l + l - 1] * coef1;
+      }
 
-        for (int i = 0; i < c_mid; ++i) {
-          if (i == 0) {
-            vst1q_lane_f32(output_ptr + i, out0, 0);
-          }
-          if (i == 1) {
-            vst1q_lane_f32(output_ptr + i, out0, 1);
-          }
-          if (i == 2) {
-            vst1q_lane_f32(output_ptr + i, out0, 2);
-          }
-        }
+      int m;
+      for (m = 1; m < output_width - 4; m += 4) {
+        float *output_ptr = output_data + m;
+        float32x4_t in0, in1, in2, in3, tmp0, tmp1, tmp2, tmp3, out0;
+        in0 = vld1q_f32(input_data + m - 1);
+        in1 = vld1q_f32(input_data + m + 3);
+        in2 = vld1q_f32(input_data + input_width + m - 1);
+        in3 = vld1q_f32(input_data + input_width + m + 3);
+        tmp0 = vextq_f32(in0, in1, 1);
+        tmp1 = vextq_f32(in0, in1, 2);
+        tmp2 = vextq_f32(in2, in3, 1);
+        tmp3 = vextq_f32(in2, in3, 2);
+        out0 = in0;
+        out0 = vaddq_f32(out0, tmp0);
+        out0 = vaddq_f32(out0, tmp1);
+        out0 = vaddq_f32(out0, in2);
+        out0 = vaddq_f32(out0, tmp2);
+        out0 = vaddq_f32(out0, tmp3);
+
+        vst1q_f32(output_ptr, vmulq_f32(out0, v_coef1));
+      }
+
+      for (m = 1; (m + 3) < output_width - 1; m += 4) {
+      }
+      for (int j = m; j < output_width - 1; j++) {
+        output_data[j] = input_data[j - 1] + input_data[j] + input_data[j + 1] +
+                         input_data[input_width + j - 1] +
+                         input_data[input_width + j] +
+                         input_data[input_width + j + 1];
+        output_data[j] = output_data[j] * coef1;
+      }
+
+      for (m = 1; m < output_width - 4; m += 4) {
+        float *output_ptr =
+            output_data + (output_height - 1) * output_width + m;
+
+        float32x4_t in0, in1, in2, in3, tmp0, tmp1, tmp2, tmp3, out0;
+        in0 = vld1q_f32(input_data + (output_height - 2) * input_width + m - 1);
+        in1 = vld1q_f32(input_data + (output_height - 2) * input_width + m + 3);
+        in2 = vld1q_f32(input_data + (output_height - 1) * input_width + m - 1);
+        in3 = vld1q_f32(input_data + (output_height - 1) * input_width + m + 3);
+        tmp0 = vextq_f32(in0, in1, 1);
+        tmp1 = vextq_f32(in0, in1, 2);
+        tmp2 = vextq_f32(in2, in3, 1);
+        tmp3 = vextq_f32(in2, in3, 2);
+        out0 = in0;
+        out0 = vaddq_f32(out0, tmp0);
+        out0 = vaddq_f32(out0, tmp1);
+        out0 = vaddq_f32(out0, in2);
+        out0 = vaddq_f32(out0, tmp2);
+        out0 = vaddq_f32(out0, tmp3);
+
+        vst1q_f32(output_ptr, vmulq_f32(out0, v_coef1));
+      }
+      for (m = 1; (m + 3) < output_width - 1; m = m + 4) {
+      }
+      for (int j = m; j < output_width - 1; j++) {
+        output_data[(output_height - 1) * input_width + j] =
+            input_data[(output_height - 2) * input_width + j - 1] +
+            input_data[(output_height - 2) * input_width + j] +
+            input_data[(output_height - 2) * input_width + j + 1] +
+            input_data[(output_height - 1) * input_width + j - 1] +
+            input_data[(output_height - 1) * input_width + j] +
+            input_data[(output_height - 1) * input_width + j + 1];
+        output_data[(output_height - 1) * output_width + j] =
+            output_data[(output_height - 1) * output_width + j] * coef1;
       }
-      //      input_data += inputdata_channel_stride;
-      //      out_data += outputdata_channel_stride;
     }
-    input_data += input_batch_stride;
-    out_data += output_batch_stride;
   }
+
+//  const int batch_size = input->dims()[0];
+//
+//  const int h_in = input->dims()[2];
+//
+//  const int w_in = input->dims()[3];
+//
+//  const int output_channels = output->dims()[1];
+//
+//  const int h_out = output->dims()[2];
+//  const int w_out = output->dims()[3];
+//  const int outputdata_channel_stride = h_out * w_out;
+//  const int inputdata_channel_stride = h_in * w_in;
+//  const int input_batch_stride = output_channels * inputdata_channel_stride;
+//  const int output_batch_stride = output_channels *
+//  outputdata_channel_stride; float *out_data = output->data<float>(); const
+//  float *input_data = input->data<float>();
+//
+//  const float coef = 1.0 / 9.0;
+//  for (int k = 0; k < batch_size; ++k) {
+//#pragma omp parallel for
+//    for (int c = 0; c < output_channels; ++c) {
+//      const float *input_seg = input_data + c * inputdata_channel_stride;
+//      float *output_seg = out_data + c * outputdata_channel_stride;
+//      // four corner point
+//      output_seg[0] = (input_seg[0] + input_seg[1] + input_seg[w_in] +
+//                       input_seg[w_in + 1]) *
+//                      coef;
+//      output_seg[w_out - 1] =
+//          (input_seg[w_in - 2] + input_seg[w_in - 1] + input_seg[w_in * 2 -
+//          2] +
+//           input_seg[2 * w_in - 1]) *
+//          coef;
+//      output_seg[(h_out - 1) * w_out] =
+//          (input_seg[(h_in - 2) * w_in] + input_seg[(h_in - 2) * w_in + 1] +
+//           input_seg[(h_in - 1) * w_in] + input_seg[(h_in - 1) * w_in + 1])
+//           *
+//          coef;
+//      output_seg[h_out * w_out - 1] =
+//          (input_seg[h_in * w_in - 1] + input_seg[h_in * w_in - 2] +
+//           input_seg[(h_in - 1) * w_in - 1] +
+//           input_seg[(h_in - 1) * w_in - 2]) *
+//          coef;
+//      // left side & right side
+//      for (int i = 1; i < h_in - 1; ++i) {
+//        output_seg[i * w_out] =
+//            (input_seg[i * w_in - w_in] + input_seg[i * w_in - w_in + 1] +
+//             input_seg[i * w_in] + input_seg[i * w_in + 1] +
+//             input_seg[i * w_in + w_in] + input_seg[i * w_in + w_in + 1]) *
+//            coef;
+//        output_seg[i * w_out + w_out - 1] =
+//            (input_seg[i * w_in - w_in + w_in - 2] +
+//             input_seg[i * w_in - w_in + 1 + w_in - 2] +
+//             input_seg[i * w_in + w_in - 2] +
+//             input_seg[i * w_in + 1 + w_in - 2] +
+//             input_seg[i * w_in + w_in + w_in - 2] +
+//             input_seg[i * w_in + w_in + 1 + w_in - 2]) *
+//            coef;
+//      }
+//      // top 1 row & bottom 1 row
+//      const float *input_tmp = input_seg;
+//
+//      float32x4_t in0, in1, in2, in3, in4, in5, in6, in7, tmp0, tmp1, tmp2,
+//          tmp3, tmp4, tmp5, sum, out0;
+//      float32x4_t v_coef = vdupq_n_f32(coef);
+//      in0 = vld1q_f32(input_tmp);
+//      in2 = vld1q_f32(input_tmp + w_in);
+//      const float *input_tmp_end = input_tmp + (h_in - 2) * w_in;
+//      in4 = vld1q_f32(input_tmp_end);
+//      in6 = vld1q_f32(input_tmp_end + w_in);
+//      int c_mid = w_out - 2;
+//      auto output_ptr = output_seg + 1;
+//      for (; c_mid > 3; c_mid -= 4) {
+//        in1 = vld1q_f32(input_tmp + 4);
+//        in3 = vld1q_f32(input_tmp + w_in + 4);
+//
+//        tmp0 = vextq_f32(in0, in1, 1);
+//        tmp1 = vextq_f32(in0, in1, 2);
+//
+//        tmp2 = vextq_f32(in2, in3, 1);
+//        tmp3 = vextq_f32(in2, in3, 2);
+//
+//        sum = vaddq_f32(in0, tmp0);
+//        sum = vaddq_f32(sum, tmp1);
+//        sum = vaddq_f32(sum, in2);
+//        sum = vaddq_f32(sum, tmp2);
+//        sum = vaddq_f32(sum, tmp3);
+//
+//        vst1q_f32(output_ptr, vmulq_f32(sum, v_coef));
+//
+//        in5 = vld1q_f32(input_tmp_end + 4);
+//        in7 = vld1q_f32(input_tmp_end + w_in + 4);
+//
+//        tmp0 = vextq_f32(in4, in5, 1);
+//        tmp1 = vextq_f32(in4, in5, 2);
+//        tmp2 = vextq_f32(in6, in7, 1);
+//        tmp3 = vextq_f32(in6, in7, 2);
+//
+//        sum = vaddq_f32(in0, tmp0);
+//        sum = vaddq_f32(sum, tmp1);
+//        sum = vaddq_f32(sum, in2);
+//        sum = vaddq_f32(sum, tmp2);
+//        sum = vaddq_f32(sum, tmp3);
+//
+//        vst1q_f32(output_ptr + (h_out - 1) * w_out, vmulq_f32(sum, v_coef));
+//
+//        // can optimize to each 8 stride.
+//        input_tmp += 4;
+//        input_tmp_end += 4;
+//        output_ptr += 4;
+//        in0 = in1;
+//        in2 = in3;
+//        in4 = in5;
+//        in6 = in7;
+//      }
+//      // top right remain
+//      float32x4_t pad0 = vdupq_n_f32(input_seg[w_in - 1]);
+//      float32x4_t pad1 = vdupq_n_f32(input_seg[2 * w_in - 1]);
+//
+//      tmp0 = vextq_f32(in0, pad0, 1);
+//      tmp1 = vextq_f32(in0, pad0, 2);
+//      tmp2 = vextq_f32(in2, pad1, 2);
+//      tmp3 = vextq_f32(in2, pad1, 2);
+//
+//      sum = vaddq_f32(in0, tmp0);
+//      sum = vaddq_f32(sum, tmp1);
+//      sum = vaddq_f32(sum, in2);
+//      sum = vaddq_f32(sum, tmp2);
+//      sum = vaddq_f32(sum, tmp3);
+//      out0 = vmulq_f32(sum, v_coef);
+//
+//      for (int i = 0; i < c_mid; ++i) {
+//        if (i == 0) {
+//          vst1q_lane_f32(output_ptr + i, out0, 0);
+//        }
+//        if (i == 1) {
+//          vst1q_lane_f32(output_ptr + i, out0, 1);
+//        }
+//        if (i == 2) {
+//          vst1q_lane_f32(output_ptr + i, out0, 2);
+//        }
+//      }
+//
+//      // bottom_right remain
+//      float32x4_t pad2 = vdupq_n_f32(input_seg[(h_in - 1) * w_in - 1]);
+//      float32x4_t pad3 = vdupq_n_f32(input_seg[h_in * w_in - 1]);
+//
+//      tmp0 = vextq_f32(in4, pad2, 1);
+//      tmp1 = vextq_f32(in4, pad2, 2);
+//      tmp2 = vextq_f32(in6, pad3, 2);
+//      tmp3 = vextq_f32(in6, pad3, 2);
+//
+//      sum = vaddq_f32(in4, tmp0);
+//      sum = vaddq_f32(sum, tmp1);
+//      sum = vaddq_f32(sum, in6);
+//      sum = vaddq_f32(sum, tmp2);
+//      sum = vaddq_f32(sum, tmp3);
+//      out0 = vmulq_f32(sum, v_coef);
+//
+//      for (int i = 0; i < c_mid; ++i) {
+//        if (i == 0) {
+//          vst1q_lane_f32(output_ptr + (h_out - 1) * w_out + i, out0, 0);
+//        }
+//        if (i == 1) {
+//          vst1q_lane_f32(output_ptr + (h_out - 1) * w_out + i, out0, 1);
+//        }
+//        if (i == 2) {
+//          vst1q_lane_f32(output_ptr + (h_out - 1) * w_out + i, out0, 2);
+//        }
+//      }
+//      // mid
+//      for (int j = 0; j < h_out - 2; ++j) {
+//        output_ptr = output_seg + w_out * (j + 1) + 1;
+//        input_tmp = input_seg + j * w_in;
+//
+//        in0 = vld1q_f32(input_tmp);
+//        in2 = vld1q_f32(input_tmp + w_in);
+//        in4 = vld1q_f32(input_tmp + 2 * w_in);
+//        c_mid = w_out - 2;
+//        for (; c_mid > 3; c_mid -= 4) {
+//          in1 = vld1q_f32(input_tmp + 4);
+//          in3 = vld1q_f32(input_tmp + w_in + 4);
+//          in5 = vld1q_f32(input_tmp + 2 * w_in + 4);
+//
+//          tmp0 = vextq_f32(in0, in1, 1);
+//          tmp1 = vextq_f32(in0, in1, 2);
+//          tmp2 = vextq_f32(in2, in3, 1);
+//          tmp3 = vextq_f32(in2, in3, 2);
+//          tmp4 = vextq_f32(in4, in5, 1);
+//          tmp5 = vextq_f32(in4, in5, 2);
+//
+//          sum = vaddq_f32(in0, tmp0);
+//          sum = vaddq_f32(sum, tmp1);
+//          sum = vaddq_f32(sum, in2);
+//          sum = vaddq_f32(sum, tmp2);
+//          sum = vaddq_f32(sum, tmp3);
+//          sum = vaddq_f32(sum, in4);
+//          sum = vaddq_f32(sum, tmp4);
+//          sum = vaddq_f32(sum, tmp5);
+//
+//          out0 = vmulq_f32(sum, v_coef);
+//          vst1q_f32(output_ptr, out0);
+//          output_ptr += 4;
+//          input_tmp += 4;
+//          in0 = in1;
+//          in2 = in3;
+//          in4 = in5;
+//        }
+//        // mid remain
+//        float32x4_t pad0 = vdupq_n_f32(input_seg[(j + 1) * w_in - 1]);
+//        float32x4_t pad1 = vdupq_n_f32(input_seg[(j + 2) * w_in - 1]);
+//        float32x4_t pad2 = vdupq_n_f32(input_seg[(j + 2) * w_in - 1]);
+//
+//        tmp0 = vextq_f32(in0, pad0, 1);
+//        tmp1 = vextq_f32(in0, pad0, 2);
+//        tmp2 = vextq_f32(in2, pad1, 1);
+//        tmp3 = vextq_f32(in2, pad1, 2);
+//        tmp4 = vextq_f32(in4, pad2, 1);
+//        tmp5 = vextq_f32(in4, pad2, 2);
+//
+//        sum = vaddq_f32(in0, tmp0);
+//        sum = vaddq_f32(sum, tmp1);
+//        sum = vaddq_f32(sum, in2);
+//        sum = vaddq_f32(sum, tmp2);
+//        sum = vaddq_f32(sum, tmp3);
+//        sum = vaddq_f32(sum, in4);
+//        sum = vaddq_f32(sum, tmp4);
+//        sum = vaddq_f32(sum, tmp5);
+//        out0 = vmulq_f32(sum, v_coef);
+//
+//        for (int i = 0; i < c_mid; ++i) {
+//          if (i == 0) {
+//            vst1q_lane_f32(output_ptr + i, out0, 0);
+//          }
+//          if (i == 1) {
+//            vst1q_lane_f32(output_ptr + i, out0, 1);
+//          }
+//          if (i == 2) {
+//            vst1q_lane_f32(output_ptr + i, out0, 2);
+//          }
+//        }
+//      }
+//      //      input_data += inputdata_channel_stride;
+//      //      out_data += outputdata_channel_stride;
+//    }
+//    input_data += input_batch_stride;
+//    out_data += output_batch_stride;
+//  }
 #endif
 }
 
@@ -662,6 +839,7 @@ void Pool3x3Avg(vector<int> strides, vector<int> paddings, const Tensor *input,
           wstart = max(wstart, 0);
           hend = min(hend, input_height);
           wend = min(wend, input_width);
+
           const float *pos1 = input_seg + hstart * input_width + wstart;
           const float *pos2 = input_seg + (hstart + 1) * input_width + wstart;
           const float *pos3 = input_seg + (hstart + 2) * input_width + wstart;
@@ -674,7 +852,8 @@ void Pool3x3Avg(vector<int> strides, vector<int> paddings, const Tensor *input,
                 sum += input_seg[h * input_width + w];
               }
             }
-            output_seg[ph * output_width + pw] = sum / 9.0;
+            output_seg[ph * output_width + pw] =
+                sum / ((hend - hstart) * (wend - wstart) * 1.0);
           } else {
 #if __aarch64__
 #else