diff --git a/src/layer/arm/convolution_arm.cpp b/src/layer/arm/convolution_arm.cpp
index f202a4889..3eb8e635e 100644
--- a/src/layer/arm/convolution_arm.cpp
+++ b/src/layer/arm/convolution_arm.cpp
@@ -64,6 +64,13 @@ int Convolution_arm::create_pipeline(const Option& opt)
         pd.set(1, activation_params[1]);// max
         activation->load_param(pd);
     }
+    else if (activation_type == 4)
+    {
+        activation = ncnn::create_layer(ncnn::LayerType::Sigmoid);
+
+        ncnn::ParamDict pd;
+        activation->load_param(pd);
+    }
 
     if (activation)
     {
diff --git a/src/layer/arm/convolutiondepthwise_arm.cpp b/src/layer/arm/convolutiondepthwise_arm.cpp
index b844bc617..8e4e1486f 100644
--- a/src/layer/arm/convolutiondepthwise_arm.cpp
+++ b/src/layer/arm/convolutiondepthwise_arm.cpp
@@ -62,6 +62,13 @@ int ConvolutionDepthWise_arm::create_pipeline(const Option& opt)
         pd.set(1, activation_params[1]);// max
         activation->load_param(pd);
     }
+    else if (activation_type == 4)
+    {
+        activation = ncnn::create_layer(ncnn::LayerType::Sigmoid);
+
+        ncnn::ParamDict pd;
+        activation->load_param(pd);
+    }
 
     if (activation)
     {
diff --git a/src/layer/arm/deconvolution_arm.cpp b/src/layer/arm/deconvolution_arm.cpp
index 5c8e419bb..fcecc687e 100644
--- a/src/layer/arm/deconvolution_arm.cpp
+++ b/src/layer/arm/deconvolution_arm.cpp
@@ -53,6 +53,13 @@ int Deconvolution_arm::create_pipeline(const Option& opt)
         pd.set(1, activation_params[1]);// max
         activation->load_param(pd);
     }
+    else if (activation_type == 4)
+    {
+        activation = ncnn::create_layer(ncnn::LayerType::Sigmoid);
+
+        ncnn::ParamDict pd;
+        activation->load_param(pd);
+    }
 
     if (activation)
     {
diff --git a/src/layer/arm/deconvolutiondepthwise_arm.cpp b/src/layer/arm/deconvolutiondepthwise_arm.cpp
index fec80d51f..a6e88821d 100644
--- a/src/layer/arm/deconvolutiondepthwise_arm.cpp
+++ b/src/layer/arm/deconvolutiondepthwise_arm.cpp
@@ -50,6 +50,13 @@ int DeconvolutionDepthWise_arm::create_pipeline(const Option& opt)
         pd.set(1, activation_params[1]);// max
         activation->load_param(pd);
     }
+    else if (activation_type == 4)
+    {
+        activation = ncnn::create_layer(ncnn::LayerType::Sigmoid);
+
+        ncnn::ParamDict pd;
+        activation->load_param(pd);
+    }
 
     if (activation)
     {
diff --git a/src/layer/arm/innerproduct_arm.cpp b/src/layer/arm/innerproduct_arm.cpp
index 86cd7caf3..d813b4f69 100644
--- a/src/layer/arm/innerproduct_arm.cpp
+++ b/src/layer/arm/innerproduct_arm.cpp
@@ -299,6 +299,10 @@ int InnerProduct_arm::forward(const Mat& bottom_blob, Mat& top_blob, const Optio
             if (sum > max)
                 sum = max;
         }
+        else if (activation_type == 4)
+        {
+            sum = 1.f / (1.f + exp(-sum));
+        }
 
         top_blob[p] = sum;
     }
diff --git a/src/layer/convolution.cpp b/src/layer/convolution.cpp
index 3a2c6de9a..cac836b9c 100644
--- a/src/layer/convolution.cpp
+++ b/src/layer/convolution.cpp
@@ -551,6 +551,10 @@ int Convolution::forward(const Mat& bottom_blob, Mat& top_blob, const Option& op
                     if (sum > max)
                         sum = max;
                 }
+                else if (activation_type == 4)
+                {
+                    sum = 1.f / (1.f + exp(-sum));
+                }
 
                 outptr[j] = sum;
             }
diff --git a/src/layer/convolution.h b/src/layer/convolution.h
index b3cfd4ad6..9ac5ae4c4 100644
--- a/src/layer/convolution.h
+++ b/src/layer/convolution.h
@@ -52,7 +52,7 @@ public:
 
     int int8_scale_term;
 
-    // 0=none 1=relu 2=leakyrelu 3=clip
+    // 0=none 1=relu 2=leakyrelu 3=clip 4=sigmoid
     int activation_type;
     Mat activation_params;
 
diff --git a/src/layer/convolutiondepthwise.cpp b/src/layer/convolutiondepthwise.cpp
index 9ba627d84..6ec4daef0 100644
--- a/src/layer/convolutiondepthwise.cpp
+++ b/src/layer/convolutiondepthwise.cpp
@@ -655,6 +655,10 @@ int ConvolutionDepthWise::forward(const Mat& bottom_blob, Mat& top_blob, const O
                         if (sum > max)
                             sum = max;
                     }
+                    else if (activation_type == 4)
+                    {
+                        sum = 1.f / (1.f + exp(-sum));
+                    }
 
                     outptr[j] = sum;
                 }
@@ -726,6 +730,10 @@ int ConvolutionDepthWise::forward(const Mat& bottom_blob, Mat& top_blob, const O
                         if (sum > max)
                             sum = max;
                     }
+                    else if (activation_type == 4)
+                    {
+                        sum = 1.f / (1.f + exp(-sum));
+                    }
 
                     outptr[j] = sum;
                 }
diff --git a/src/layer/convolutiondepthwise.h b/src/layer/convolutiondepthwise.h
index e212d19dd..a61497e8a 100644
--- a/src/layer/convolutiondepthwise.h
+++ b/src/layer/convolutiondepthwise.h
@@ -53,7 +53,7 @@ public:
 
     int int8_scale_term;
 
-    // 0=none 1=relu 2=leakyrelu 3=clip
+    // 0=none 1=relu 2=leakyrelu 3=clip 4=sigmoid
     int activation_type;
     Mat activation_params;
 
diff --git a/src/layer/deconvolution.cpp b/src/layer/deconvolution.cpp
index c7e65d9ed..a84815587 100644
--- a/src/layer/deconvolution.cpp
+++ b/src/layer/deconvolution.cpp
@@ -186,6 +186,16 @@ int Deconvolution::forward(const Mat& bottom_blob, Mat& top_blob, const Option&
                     outptr[i] = max;
             }
         }
+        else if (activation_type == 4)
+        {
+            float* outptr = out;
+            int size = outw * outh;
+
+            for (int i = 0; i < size; i++)
+            {
+                outptr[i] = 1.f / (1.f + exp(-outptr[i]));
+            }
+        }
     }
 
     if (pad_w > 0 || pad_h > 0)
diff --git a/src/layer/deconvolution.h b/src/layer/deconvolution.h
index 05fe058d6..e4e873fbb 100644
--- a/src/layer/deconvolution.h
+++ b/src/layer/deconvolution.h
@@ -45,7 +45,7 @@ public:
 
     int weight_data_size;
 
-    // 0=none 1=relu 2=leakyrelu 3=clip
+    // 0=none 1=relu 2=leakyrelu 3=clip 4=sigmoid
     int activation_type;
     Mat activation_params;
 
diff --git a/src/layer/deconvolutiondepthwise.cpp b/src/layer/deconvolutiondepthwise.cpp
index 1ac58b3de..1c3931499 100644
--- a/src/layer/deconvolutiondepthwise.cpp
+++ b/src/layer/deconvolutiondepthwise.cpp
@@ -186,6 +186,16 @@ int DeconvolutionDepthWise::forward(const Mat& bottom_blob, Mat& top_blob, const
                         outptr[i] = max;
                 }
             }
+            else if (activation_type == 4)
+            {
+                float* outptr = m;
+                int size = outw * outh;
+
+                for (int i = 0; i < size; i++)
+                {
+                    outptr[i] = 1.f / (1.f + exp(-outptr[i]));
+                }
+            }
         }
     }
     else
@@ -270,6 +280,16 @@ int DeconvolutionDepthWise::forward(const Mat& bottom_blob, Mat& top_blob, const
                             outptr[i] = max;
                     }
                 }
+                else if (activation_type == 4)
+                {
+                    float* outptr = out;
+                    int size = outw * outh;
+
+                    for (int i = 0; i < size; i++)
+                    {
+                        outptr[i] = 1.f / (1.f + exp(-outptr[i]));
+                    }
+                }
             }
         }
     }
diff --git a/src/layer/deconvolutiondepthwise.h b/src/layer/deconvolutiondepthwise.h
index 315d504b7..db6782b0a 100644
--- a/src/layer/deconvolutiondepthwise.h
+++ b/src/layer/deconvolutiondepthwise.h
@@ -46,7 +46,7 @@ public:
     int weight_data_size;
     int group;
 
-    // 0=none 1=relu 2=leakyrelu 3=clip
+    // 0=none 1=relu 2=leakyrelu 3=clip 4=sigmoid
     int activation_type;
     Mat activation_params;
 
diff --git a/src/layer/innerproduct.cpp b/src/layer/innerproduct.cpp
index f7dc7a1a6..979903d6d 100644
--- a/src/layer/innerproduct.cpp
+++ b/src/layer/innerproduct.cpp
@@ -289,6 +289,10 @@ int InnerProduct::forward(const Mat& bottom_blob, Mat& top_blob, const Option& o
             if (sum > max)
                 sum = max;
         }
+        else if (activation_type == 4)
+        {
+            sum = 1.f / (1.f + exp(-sum));
+        }
 
         top_blob[p] = sum;
     }
diff --git a/src/layer/innerproduct.h b/src/layer/innerproduct.h
index 76d4b551a..56ae53973 100644
--- a/src/layer/innerproduct.h
+++ b/src/layer/innerproduct.h
@@ -42,7 +42,7 @@ public:
 
     int int8_scale_term;
 
-    // 0=none 1=relu 2=leakyrelu 3=clip
+    // 0=none 1=relu 2=leakyrelu 3=clip 4=sigmoid
     int activation_type;
     Mat activation_params;
 
diff --git a/src/layer/vulkan/shader/convolution.comp b/src/layer/vulkan/shader/convolution.comp
index b1bfe9878..72d03dab4 100644
--- a/src/layer/vulkan/shader/convolution.comp
+++ b/src/layer/vulkan/shader/convolution.comp
@@ -109,6 +109,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/convolution_1x1s1d1.comp b/src/layer/vulkan/shader/convolution_1x1s1d1.comp
index 88102d1a1..661af4a59 100644
--- a/src/layer/vulkan/shader/convolution_1x1s1d1.comp
+++ b/src/layer/vulkan/shader/convolution_1x1s1d1.comp
@@ -94,6 +94,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep_4 + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/convolution_pack1to4.comp b/src/layer/vulkan/shader/convolution_pack1to4.comp
index 35243e7d6..cdecb692e 100644
--- a/src/layer/vulkan/shader/convolution_pack1to4.comp
+++ b/src/layer/vulkan/shader/convolution_pack1to4.comp
@@ -28,6 +28,9 @@ layout (constant_id = 3) const int dilation_h = 1;
 layout (constant_id = 4) const int stride_w = 1;
 layout (constant_id = 5) const int stride_h = 1;
 layout (constant_id = 6) const int bias_term = 0;
+layout (constant_id = 7) const int activation_type = 0;
+layout (constant_id = 8) const float activation_param_0 = 0;
+layout (constant_id = 9) const float activation_param_1 = 0;
 
 layout (local_size_x_id = 233) in;
 layout (local_size_y_id = 234) in;
@@ -95,5 +98,25 @@ void main()
         }
     }
 
+    if (activation_type == 1)
+    {
+        sum = max(sum, afp(0.f));
+    }
+    if (activation_type == 2)
+    {
+        const afp slope = afp(activation_param_0);
+        sum = mix(sum, sum * afp(slope), lessThan(sum, afpvec4(0.f)));
+    }
+    if (activation_type == 3)
+    {
+        const afp const_min = afp(activation_param_0);
+        const afp const_max = afp(activation_param_1);
+        sum = clamp(sum, const_min, const_max);
+    }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
+
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/convolution_pack4.comp b/src/layer/vulkan/shader/convolution_pack4.comp
index d28340857..002241458 100644
--- a/src/layer/vulkan/shader/convolution_pack4.comp
+++ b/src/layer/vulkan/shader/convolution_pack4.comp
@@ -128,6 +128,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/convolution_pack4_3x3s1d1_lds_8_8_2.comp b/src/layer/vulkan/shader/convolution_pack4_3x3s1d1_lds_8_8_2.comp
index aec14defc..66fce0c76 100644
--- a/src/layer/vulkan/shader/convolution_pack4_3x3s1d1_lds_8_8_2.comp
+++ b/src/layer/vulkan/shader/convolution_pack4_3x3s1d1_lds_8_8_2.comp
@@ -88,20 +88,25 @@ void main()
     int v_offset = gy * p.w + gx;
     int w_offset = gz * p.c * 3 * 3;
 
+    int lv_offset = ly * (/*gl_WorkGroupSize.x*/8 + 2) + lx;
+    int lw_offset = lz * 3 * 3;
+
     for (int z = 0; z < p.c; z++)
     {
-        int lv_offset = ly * int(/*gl_WorkGroupSize.x*/8 + 2) + lx;
-        int lw_offset = lz * 3 * 3;
-
         barrier();
 
         // load v to local cache
         if (lz == 0)
         {
             int v_offset_1 = v_offset + p.w + 1;
-            int lv_offset_1 = lv_offset + int(/*gl_WorkGroupSize.x*/8 + 2) + 1;
+            int lv_offset_1 = lv_offset + (/*gl_WorkGroupSize.x*/8 + 2) + 1;
 
             lv[lv_offset_1] = afpvec4(bottom_blob_data[v_offset_1]);
+        }
+        else
+        {
+            int v_offset_1 = v_offset + p.w + 1;
+            int lv_offset_1 = lv_offset + (/*gl_WorkGroupSize.x*/8 + 2) + 1;
 
             // left and right border
             if (lx == 0)
@@ -170,20 +175,17 @@ void main()
         {
             for (int x = 0; x < 3; x++)
             {
-                afpvec4 v = lv[lv_offset + x];
+                afpvec4 v = lv[lv_offset + y * (/*gl_WorkGroupSize.x*/8 + 2) + x];
 
                 afpmat4 k = afpmat4(
-                    lk0[lw_offset + x],
-                    lk1[lw_offset + x],
-                    lk2[lw_offset + x],
-                    lk3[lw_offset + x]
+                    lk0[lw_offset + y * 3 + x],
+                    lk1[lw_offset + y * 3 + x],
+                    lk2[lw_offset + y * 3 + x],
+                    lk3[lw_offset + y * 3 + x]
                 );
 
                 sum += v * k;
             }
-
-            lv_offset += int(/*gl_WorkGroupSize.x*/8 + 2);
-            lw_offset += 3;
         }
 
         v_offset += p.cstep;
@@ -208,6 +210,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/convolution_pack4to1.comp b/src/layer/vulkan/shader/convolution_pack4to1.comp
index b900e24ac..7242a8f8f 100644
--- a/src/layer/vulkan/shader/convolution_pack4to1.comp
+++ b/src/layer/vulkan/shader/convolution_pack4to1.comp
@@ -113,6 +113,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/convolutiondepthwise.comp b/src/layer/vulkan/shader/convolutiondepthwise.comp
index 1599ae22c..6a12526e8 100644
--- a/src/layer/vulkan/shader/convolutiondepthwise.comp
+++ b/src/layer/vulkan/shader/convolutiondepthwise.comp
@@ -107,6 +107,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/convolutiondepthwise_group.comp b/src/layer/vulkan/shader/convolutiondepthwise_group.comp
index 604069b2d..9e99a8ba9 100644
--- a/src/layer/vulkan/shader/convolutiondepthwise_group.comp
+++ b/src/layer/vulkan/shader/convolutiondepthwise_group.comp
@@ -120,6 +120,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/convolutiondepthwise_group_pack1to4.comp b/src/layer/vulkan/shader/convolutiondepthwise_group_pack1to4.comp
index 9e475ac4d..fbc403813 100644
--- a/src/layer/vulkan/shader/convolutiondepthwise_group_pack1to4.comp
+++ b/src/layer/vulkan/shader/convolutiondepthwise_group_pack1to4.comp
@@ -124,6 +124,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/convolutiondepthwise_group_pack4.comp b/src/layer/vulkan/shader/convolutiondepthwise_group_pack4.comp
index 059a9e8f4..b62c86fbf 100644
--- a/src/layer/vulkan/shader/convolutiondepthwise_group_pack4.comp
+++ b/src/layer/vulkan/shader/convolutiondepthwise_group_pack4.comp
@@ -139,6 +139,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/convolutiondepthwise_group_pack4to1.comp b/src/layer/vulkan/shader/convolutiondepthwise_group_pack4to1.comp
index 98422710e..72a46acb5 100644
--- a/src/layer/vulkan/shader/convolutiondepthwise_group_pack4to1.comp
+++ b/src/layer/vulkan/shader/convolutiondepthwise_group_pack4to1.comp
@@ -124,6 +124,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/convolutiondepthwise_pack4.comp b/src/layer/vulkan/shader/convolutiondepthwise_pack4.comp
index bf81cda6c..6fd470d59 100644
--- a/src/layer/vulkan/shader/convolutiondepthwise_pack4.comp
+++ b/src/layer/vulkan/shader/convolutiondepthwise_pack4.comp
@@ -111,6 +111,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/deconvolution.comp b/src/layer/vulkan/shader/deconvolution.comp
index 8393e04fd..cece3d975 100644
--- a/src/layer/vulkan/shader/deconvolution.comp
+++ b/src/layer/vulkan/shader/deconvolution.comp
@@ -129,6 +129,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/deconvolution_pack1to4.comp b/src/layer/vulkan/shader/deconvolution_pack1to4.comp
index e4be824b2..a1e09629d 100644
--- a/src/layer/vulkan/shader/deconvolution_pack1to4.comp
+++ b/src/layer/vulkan/shader/deconvolution_pack1to4.comp
@@ -133,6 +133,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/deconvolution_pack4.comp b/src/layer/vulkan/shader/deconvolution_pack4.comp
index 7325498ba..9d2e5d897 100644
--- a/src/layer/vulkan/shader/deconvolution_pack4.comp
+++ b/src/layer/vulkan/shader/deconvolution_pack4.comp
@@ -148,6 +148,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/deconvolution_pack4to1.comp b/src/layer/vulkan/shader/deconvolution_pack4to1.comp
index a00e2a633..c14593481 100644
--- a/src/layer/vulkan/shader/deconvolution_pack4to1.comp
+++ b/src/layer/vulkan/shader/deconvolution_pack4to1.comp
@@ -133,6 +133,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/deconvolutiondepthwise.comp b/src/layer/vulkan/shader/deconvolutiondepthwise.comp
index 92ce29e6f..f71ae1c2f 100644
--- a/src/layer/vulkan/shader/deconvolutiondepthwise.comp
+++ b/src/layer/vulkan/shader/deconvolutiondepthwise.comp
@@ -126,6 +126,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/deconvolutiondepthwise_group.comp b/src/layer/vulkan/shader/deconvolutiondepthwise_group.comp
index fc92b3825..8380c66da 100644
--- a/src/layer/vulkan/shader/deconvolutiondepthwise_group.comp
+++ b/src/layer/vulkan/shader/deconvolutiondepthwise_group.comp
@@ -138,6 +138,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack1to4.comp b/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack1to4.comp
index 4d2104305..cfebbbf86 100644
--- a/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack1to4.comp
+++ b/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack1to4.comp
@@ -142,6 +142,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack4.comp b/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack4.comp
index 09726b9ad..9a178c131 100644
--- a/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack4.comp
+++ b/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack4.comp
@@ -157,6 +157,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack4to1.comp b/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack4to1.comp
index 1a471f06c..5689aecbd 100644
--- a/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack4to1.comp
+++ b/src/layer/vulkan/shader/deconvolutiondepthwise_group_pack4to1.comp
@@ -142,6 +142,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/deconvolutiondepthwise_pack4.comp b/src/layer/vulkan/shader/deconvolutiondepthwise_pack4.comp
index 712211bf8..6e4860d57 100644
--- a/src/layer/vulkan/shader/deconvolutiondepthwise_pack4.comp
+++ b/src/layer/vulkan/shader/deconvolutiondepthwise_pack4.comp
@@ -130,6 +130,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gz * p.outcstep + gy * p.outw + gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/innerproduct.comp b/src/layer/vulkan/shader/innerproduct.comp
index c26d45a17..db4a05ff7 100644
--- a/src/layer/vulkan/shader/innerproduct.comp
+++ b/src/layer/vulkan/shader/innerproduct.comp
@@ -92,6 +92,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gx] = sfp(sum);
 }
diff --git a/src/layer/vulkan/shader/innerproduct_pack1to4.comp b/src/layer/vulkan/shader/innerproduct_pack1to4.comp
index 1b84e6d19..f88c37f4d 100644
--- a/src/layer/vulkan/shader/innerproduct_pack1to4.comp
+++ b/src/layer/vulkan/shader/innerproduct_pack1to4.comp
@@ -96,6 +96,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/innerproduct_pack4.comp b/src/layer/vulkan/shader/innerproduct_pack4.comp
index 7468cd689..61cd94320 100644
--- a/src/layer/vulkan/shader/innerproduct_pack4.comp
+++ b/src/layer/vulkan/shader/innerproduct_pack4.comp
@@ -111,6 +111,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/innerproduct_pack4_lds_64.comp b/src/layer/vulkan/shader/innerproduct_pack4_lds_64.comp
index 75c47a387..a52944fee 100644
--- a/src/layer/vulkan/shader/innerproduct_pack4_lds_64.comp
+++ b/src/layer/vulkan/shader/innerproduct_pack4_lds_64.comp
@@ -64,9 +64,6 @@ void main()
     int gy = int(gl_GlobalInvocationID.y);
     int gz = int(gl_GlobalInvocationID.z);
 
-    if (gx >= p.outw || gy >= 1 || gz >= 1)
-        return;
-
     int lx = int(gl_LocalInvocationID.x);
     int ly = int(gl_LocalInvocationID.y);
     int lz = int(gl_LocalInvocationID.z);
@@ -90,94 +87,103 @@ void main()
         barrier();
 
         // load v to local cache
-        if (lz < 64)
+        if (lx < 64)
         {
-            lv[lz] = afpvec4(bottom_blob_data[i + lz]);
+            lv[lx] = afpvec4(bottom_blob_data[i + lx]);
         }
 
         barrier();
         memoryBarrierShared();
 
-        afpvec4 v = lv[lz];
+        for (int j=0; j<64; j++)
+        {
+            afpvec4 v = lv[j];
 
 #if NCNN_fp16_storage && !NCNN_fp16_arithmetic
-        // GL_EXT_shader_16bit_storage does not define f16mat4 type :(
-        afpmat4 k = afpmat4(
-            afpvec4(weight_data[(w_offset + i) * 4 + 0]),
-            afpvec4(weight_data[(w_offset + i) * 4 + 1]),
-            afpvec4(weight_data[(w_offset + i) * 4 + 2]),
-            afpvec4(weight_data[(w_offset + i) * 4 + 3])
-        );
+            // GL_EXT_shader_16bit_storage does not define f16mat4 type :(
+            afpmat4 k = afpmat4(
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 0]),
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 1]),
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 2]),
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 3])
+            );
 #else
-        afpmat4 k = afpmat4(weight_data[w_offset + i]);
+            afpmat4 k = afpmat4(weight_data[w_offset + i + j]);
 #endif
 
-        sum += v * k;
+            sum += v * k;
+        }
     }
     for (; i+15 < p.w; i+=16)
     {
         barrier();
 
         // load v to local cache
-        if (lz < 16)
+        if (lx < 16)
         {
-            lv[lz] = afpvec4(bottom_blob_data[i + lz]);
+            lv[lx] = afpvec4(bottom_blob_data[i + lx]);
         }
 
         barrier();
         memoryBarrierShared();
 
-        afpvec4 v = lv[lz];
+        for (int j=0; j<16; j++)
+        {
+            afpvec4 v = lv[j];
 
 #if NCNN_fp16_storage && !NCNN_fp16_arithmetic
-        // GL_EXT_shader_16bit_storage does not define f16mat4 type :(
-        afpmat4 k = afpmat4(
-            afpvec4(weight_data[(w_offset + i) * 4 + 0]),
-            afpvec4(weight_data[(w_offset + i) * 4 + 1]),
-            afpvec4(weight_data[(w_offset + i) * 4 + 2]),
-            afpvec4(weight_data[(w_offset + i) * 4 + 3])
-        );
+            // GL_EXT_shader_16bit_storage does not define f16mat4 type :(
+            afpmat4 k = afpmat4(
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 0]),
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 1]),
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 2]),
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 3])
+            );
 #else
-        afpmat4 k = afpmat4(weight_data[w_offset + i]);
+            afpmat4 k = afpmat4(weight_data[w_offset + i + j]);
 #endif
 
-        sum += v * k;
+            sum += v * k;
+        }
     }
     for (; i+3 < p.w; i+=4)
     {
         barrier();
 
         // load v to local cache
-        if (lz < 4)
+        if (lx < 4)
         {
-            lv[lz] = afpvec4(bottom_blob_data[i + lz]);
+            lv[lx] = afpvec4(bottom_blob_data[i + lx]);
         }
 
         barrier();
         memoryBarrierShared();
 
-        afpvec4 v = lv[lz];
+        for (int j=0; j<4; j++)
+        {
+            afpvec4 v = lv[j];
 
 #if NCNN_fp16_storage && !NCNN_fp16_arithmetic
-        // GL_EXT_shader_16bit_storage does not define f16mat4 type :(
-        afpmat4 k = afpmat4(
-            afpvec4(weight_data[(w_offset + i) * 4 + 0]),
-            afpvec4(weight_data[(w_offset + i) * 4 + 1]),
-            afpvec4(weight_data[(w_offset + i) * 4 + 2]),
-            afpvec4(weight_data[(w_offset + i) * 4 + 3])
-        );
+            // GL_EXT_shader_16bit_storage does not define f16mat4 type :(
+            afpmat4 k = afpmat4(
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 0]),
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 1]),
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 2]),
+                afpvec4(weight_data[(w_offset + i + j) * 4 + 3])
+            );
 #else
-        afpmat4 k = afpmat4(weight_data[w_offset + i]);
+            afpmat4 k = afpmat4(weight_data[w_offset + i + j]);
 #endif
 
-        sum += v * k;
+            sum += v * k;
+        }
     }
     for (; i < p.w; i++)
     {
         barrier();
 
         // load v to local cache
-        if (lz == 0)
+        if (lx == 0)
         {
             lv[0] = afpvec4(bottom_blob_data[i]);
         }
@@ -202,6 +208,9 @@ void main()
         sum += v * k;
     }
 
+    if (gx >= p.outw || gy >= 1 || gz >= 1)
+        return;
+
     if (activation_type == 1)
     {
         sum = max(sum, afp(0.f));
@@ -217,6 +226,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gx] = sfpvec4(sum);
 }
diff --git a/src/layer/vulkan/shader/innerproduct_pack4to1.comp b/src/layer/vulkan/shader/innerproduct_pack4to1.comp
index 5d3b1ab3c..fbc970119 100644
--- a/src/layer/vulkan/shader/innerproduct_pack4to1.comp
+++ b/src/layer/vulkan/shader/innerproduct_pack4to1.comp
@@ -96,6 +96,10 @@ void main()
         const afp const_max = afp(activation_param_1);
         sum = clamp(sum, const_min, const_max);
     }
+    if (activation_type == 4)
+    {
+        sum = afp(1.f) / (afp(1.f) + exp(-sum));
+    }
 
     top_blob_data[gx] = sfp(sum);
 }
diff --git a/src/layer/x86/convolution_x86.cpp b/src/layer/x86/convolution_x86.cpp
index 070a9ee8b..57d9c6e20 100644
--- a/src/layer/x86/convolution_x86.cpp
+++ b/src/layer/x86/convolution_x86.cpp
@@ -65,6 +65,13 @@ int Convolution_x86::create_pipeline(const Option& opt)
         pd.set(1, activation_params[1]);// max
         activation->load_param(pd);
     }
+    else if (activation_type == 4)
+    {
+        activation = ncnn::create_layer(ncnn::LayerType::Sigmoid);
+
+        ncnn::ParamDict pd;
+        activation->load_param(pd);
+    }
 
     if (activation)
     {
diff --git a/src/layer/x86/convolutiondepthwise_x86.cpp b/src/layer/x86/convolutiondepthwise_x86.cpp
index ea6026d23..0adaad109 100644
--- a/src/layer/x86/convolutiondepthwise_x86.cpp
+++ b/src/layer/x86/convolutiondepthwise_x86.cpp
@@ -62,6 +62,13 @@ int ConvolutionDepthWise_x86::create_pipeline(const Option& opt)
         pd.set(1, activation_params[1]);// max
         activation->load_param(pd);
     }
+    else if (activation_type == 4)
+    {
+        activation = ncnn::create_layer(ncnn::LayerType::Sigmoid);
+
+        ncnn::ParamDict pd;
+        activation->load_param(pd);
+    }
 
     if (activation)
     {
diff --git a/src/pipeline.cpp b/src/pipeline.cpp
index 2d3a21ece..d666ffa2d 100644
--- a/src/pipeline.cpp
+++ b/src/pipeline.cpp
@@ -45,7 +45,7 @@ int Pipeline::create(const uint32_t* spv_data, size_t spv_data_size, const char*
 {
     local_shader_module = vkdev->compile_shader_module(spv_data, spv_data_size);
 
-    fprintf(stderr, "local_shader_module %p %s created\n", local_shader_module, entry_name);
+//     fprintf(stderr, "local_shader_module %p %s created\n", local_shader_module, entry_name);
 
     create_descriptorset_layout(binding_count);
 
diff --git a/tools/ncnnoptimize.cpp b/tools/ncnnoptimize.cpp
index 8242607dc..26f763343 100644
--- a/tools/ncnnoptimize.cpp
+++ b/tools/ncnnoptimize.cpp
@@ -91,8 +91,10 @@ public:
 
     int eliminate_dropout();
     int eliminate_flatten_after_global_pooling();
+    int eliminate_flatten_after_innerproduct();
 
     int replace_convolution_with_innerproduct_after_global_pooling();
+    int replace_convolution_with_innerproduct_after_innerproduct();
 
 public:
     int fprintf_param_int_array(int id, const ncnn::Mat& m, FILE* pp);
@@ -662,7 +664,7 @@ int NetOptimize::fuse_convolution_activation()
         int j = i + 1;
         for (; j<layer_count; j++)
         {
-            if (layers[j]->type != "ReLU" && layers[j]->type != "Clip")
+            if (layers[j]->type != "ReLU" && layers[j]->type != "Clip" && layers[j]->type != "Sigmoid")
                 continue;
 
             if (layers[j]->bottoms.size() != 1)
@@ -705,6 +707,10 @@ int NetOptimize::fuse_convolution_activation()
             convolution->activation_params[0] = clip->min;
             convolution->activation_params[1] = clip->max;
         }
+        else if (activation->type == "Sigmoid")
+        {
+            convolution->activation_type = 4;
+        }
 
         int top_blob_index_final = activation->tops[0];
         convolution->tops[0] = top_blob_index_final;
@@ -729,7 +735,7 @@ int NetOptimize::fuse_convolutiondepthwise_activation()
         int j = i + 1;
         for (; j<layer_count; j++)
         {
-            if (layers[j]->type != "ReLU" && layers[j]->type != "Clip")
+            if (layers[j]->type != "ReLU" && layers[j]->type != "Clip" && layers[j]->type != "Sigmoid")
                 continue;
 
             if (layers[j]->bottoms.size() != 1)
@@ -772,6 +778,10 @@ int NetOptimize::fuse_convolutiondepthwise_activation()
             convolutiondepthwise->activation_params[0] = clip->min;
             convolutiondepthwise->activation_params[1] = clip->max;
         }
+        else if (activation->type == "Sigmoid")
+        {
+            convolutiondepthwise->activation_type = 4;
+        }
 
         int top_blob_index_final = activation->tops[0];
         convolutiondepthwise->tops[0] = top_blob_index_final;
@@ -796,7 +806,7 @@ int NetOptimize::fuse_deconvolution_activation()
         int j = i + 1;
         for (; j<layer_count; j++)
         {
-            if (layers[j]->type != "ReLU" && layers[j]->type != "Clip")
+            if (layers[j]->type != "ReLU" && layers[j]->type != "Clip" && layers[j]->type != "Sigmoid")
                 continue;
 
             if (layers[j]->bottoms.size() != 1)
@@ -839,6 +849,10 @@ int NetOptimize::fuse_deconvolution_activation()
             deconvolution->activation_params[0] = clip->min;
             deconvolution->activation_params[1] = clip->max;
         }
+        else if (activation->type == "Sigmoid")
+        {
+            deconvolution->activation_type = 4;
+        }
 
         int top_blob_index_final = activation->tops[0];
         deconvolution->tops[0] = top_blob_index_final;
@@ -863,7 +877,7 @@ int NetOptimize::fuse_deconvolutiondepthwise_activation()
         int j = i + 1;
         for (; j<layer_count; j++)
         {
-            if (layers[j]->type != "ReLU" && layers[j]->type != "Clip")
+            if (layers[j]->type != "ReLU" && layers[j]->type != "Clip" && layers[j]->type != "Sigmoid")
                 continue;
 
             if (layers[j]->bottoms.size() != 1)
@@ -906,6 +920,10 @@ int NetOptimize::fuse_deconvolutiondepthwise_activation()
             deconvolutiondepthwise->activation_params[0] = clip->min;
             deconvolutiondepthwise->activation_params[1] = clip->max;
         }
+        else if (activation->type == "Sigmoid")
+        {
+            deconvolutiondepthwise->activation_type = 4;
+        }
 
         int top_blob_index_final = activation->tops[0];
         deconvolutiondepthwise->tops[0] = top_blob_index_final;
@@ -930,7 +948,7 @@ int NetOptimize::fuse_innerproduct_activation()
         int j = i + 1;
         for (; j<layer_count; j++)
         {
-            if (layers[j]->type != "ReLU" && layers[j]->type != "Clip")
+            if (layers[j]->type != "ReLU" && layers[j]->type != "Clip" && layers[j]->type != "Sigmoid")
                 continue;
 
             if (layers[j]->bottoms.size() != 1)
@@ -973,6 +991,10 @@ int NetOptimize::fuse_innerproduct_activation()
             innerproduct->activation_params[0] = clip->min;
             innerproduct->activation_params[1] = clip->max;
         }
+        else if (activation->type == "Sigmoid")
+        {
+            innerproduct->activation_type = 4;
+        }
 
         int top_blob_index_final = activation->tops[0];
         innerproduct->tops[0] = top_blob_index_final;
@@ -1071,6 +1093,47 @@ int NetOptimize::eliminate_flatten_after_global_pooling()
     return 0;
 }
 
+int NetOptimize::eliminate_flatten_after_innerproduct()
+{
+    const int layer_count = layers.size();
+    for (int i=0; i<layer_count; i++)
+    {
+        if (layers[i]->type != "InnerProduct")
+            continue;
+
+        // InnerProduct - Flatten
+        int top_blob_index = layers[i]->tops[0];
+
+        int j = i + 1;
+        for (; j<layer_count; j++)
+        {
+            if (layers[j]->type != "Flatten")
+                continue;
+
+            if (layers[j]->bottoms.size() != 1)
+                continue;
+
+            if (layers[j]->bottoms[0] == top_blob_index)
+                break;
+        }
+
+        if (j == layer_count)
+            continue;
+
+        ncnn::InnerProduct* innerproduct = (ncnn::InnerProduct*)layers[i];
+        ncnn::Flatten* flatten = (ncnn::Flatten*)layers[j];
+
+        fprintf(stderr, "eliminate_flatten_after_innerproduct %s %s\n", innerproduct->name.c_str(), flatten->name.c_str());
+
+        int top_blob_index_final = flatten->tops[0];
+        innerproduct->tops[0] = top_blob_index_final;
+        blobs[top_blob_index_final].producer = i;
+        flatten->type = "ncnnfused";
+    }
+
+    return 0;
+}
+
 int NetOptimize::replace_convolution_with_innerproduct_after_global_pooling()
 {
     const int layer_count = layers.size();
@@ -1123,6 +1186,9 @@ int NetOptimize::replace_convolution_with_innerproduct_after_global_pooling()
         innerproduct->weight_data = convolution->weight_data;
         innerproduct->bias_data = convolution->bias_data;
 
+        innerproduct->activation_type = convolution->activation_type;
+        innerproduct->activation_params = convolution->activation_params;
+
         layers[j] = innerproduct;
         delete convolution;
     }
@@ -1130,6 +1196,75 @@ int NetOptimize::replace_convolution_with_innerproduct_after_global_pooling()
     return 0;
 }
 
+int NetOptimize::replace_convolution_with_innerproduct_after_innerproduct()
+{
+    const int layer_count = layers.size();
+    for (;;)
+    {
+    bool replaced = false;
+
+    for (int i=0; i<layer_count; i++)
+    {
+        if (layers[i]->type != "InnerProduct")
+            continue;
+
+        // InnerProduct - Convolution
+        int top_blob_index = layers[i]->tops[0];
+
+        int j = i + 1;
+        for (; j<layer_count; j++)
+        {
+            if (layers[j]->type != "Convolution")
+                continue;
+
+            if (layers[j]->bottoms.size() != 1)
+                continue;
+
+            if (layers[j]->bottoms[0] == top_blob_index)
+                break;
+        }
+
+        if (j == layer_count)
+            continue;
+
+        ncnn::InnerProduct* innerproduct = (ncnn::InnerProduct*)layers[i];
+        ncnn::Convolution* convolution = (ncnn::Convolution*)layers[j];
+
+        fprintf(stderr, "replace_convolution_with_innerproduct_after_innerproduct %s %s\n", innerproduct->name.c_str(), convolution->name.c_str());
+
+        ncnn::InnerProduct* innerproduct2 = (ncnn::InnerProduct*)ncnn::create_layer("InnerProduct");
+
+        innerproduct2->type = "InnerProduct";
+        innerproduct2->name = convolution->name;
+        innerproduct2->bottoms = convolution->bottoms;
+        innerproduct2->tops = convolution->tops;
+
+        ncnn::ParamDict pd;
+        innerproduct2->load_param(pd);
+
+        innerproduct2->num_output = convolution->num_output;
+        innerproduct2->bias_term = convolution->bias_term;
+        innerproduct2->weight_data_size = convolution->weight_data_size;
+
+        innerproduct2->weight_data = convolution->weight_data;
+        innerproduct2->bias_data = convolution->bias_data;
+
+        innerproduct2->activation_type = convolution->activation_type;
+        innerproduct2->activation_params = convolution->activation_params;
+
+        layers[j] = innerproduct2;
+        delete convolution;
+
+        replaced = true;
+    }
+
+    if (!replaced)
+        break;
+    }
+
+    return 0;
+}
+
 int NetOptimize::fprintf_param_int_array(int id, const ncnn::Mat& m, FILE* pp)
 {
     const int count = m.w;
@@ -1158,8 +1293,15 @@ int NetOptimize::fprintf_param_float_array(int id, const ncnn::Mat& m, FILE* pp)
     return 0;
 }
 
+static inline size_t alignSize(size_t sz, int n)
+{
+    return (sz + n-1) & -n;
+}
+
 int NetOptimize::fwrite_weight_tag_data(int tag, const ncnn::Mat& data, FILE* bp)
 {
+    int p0 = ftell(bp);
+
     ncnn::Mat data_flattened = data.reshape(data.w * data.h * data.c);
     if (storage_type == 1 && tag == 0)
     {
@@ -1174,13 +1316,29 @@ int NetOptimize::fwrite_weight_tag_data(int tag, const ncnn::Mat& data, FILE* bp
         fwrite(&tag, sizeof(int), 1, bp);
         fwrite(data_flattened.data, data_flattened.elemsize, data_flattened.w, bp);
     }
+
+    // padding to 32bit align
+    int nwrite = ftell(bp) - p0;
+    int nalign = alignSize(nwrite, 4);
+    unsigned char padding[4] = {0x00, 0x00, 0x00, 0x00};
+    fwrite(padding, sizeof(unsigned char), nalign - nwrite, bp);
+
     return 0;
 }
 
 int NetOptimize::fwrite_weight_data(const ncnn::Mat& data, FILE* bp)
 {
+    int p0 = ftell(bp);
+
     ncnn::Mat data_flattened = data.reshape(data.w * data.h * data.c);
     fwrite(data_flattened.data, data_flattened.elemsize, data_flattened.w, bp);
+
+    // padding to 32bit align
+    int nwrite = ftell(bp) - p0;
+    int nalign = alignSize(nwrite, 4);
+    unsigned char padding[4] = {0x00, 0x00, 0x00, 0x00};
+    fwrite(padding, sizeof(unsigned char), nalign - nwrite, bp);
+
     return 0;
 }
 
@@ -1835,6 +1993,9 @@ int main(int argc, char** argv)
     optimizer.eliminate_flatten_after_global_pooling();
 
     optimizer.replace_convolution_with_innerproduct_after_global_pooling();
+    optimizer.replace_convolution_with_innerproduct_after_innerproduct();
+
+    optimizer.eliminate_flatten_after_innerproduct();
 
     optimizer.save(outparam, outbin);