diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 39f43eafc..e8b5dd001 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1614,6 +1614,18 @@ jobs:
         cmake -DCMAKE_INSTALL_PREFIX=install -DNCNN_VERSION_STRING="${{ needs.setup.outputs.VERSION }}" -DProtobuf_INCLUDE_DIR="$env:GITHUB_WORKSPACE\protobuf-install\x64\include" -DProtobuf_LIBRARIES="$env:GITHUB_WORKSPACE\protobuf-install\x64\lib\libprotobuf.lib" -DProtobuf_PROTOC_EXECUTABLE="$env:GITHUB_WORKSPACE\protobuf-install\x64\bin\protoc.exe" -DNCNN_VULKAN=ON -DNCNN_BUILD_EXAMPLES=OFF -DNCNN_BUILD_TOOLS=ON -DNCNN_BUILD_BENCHMARK=OFF ..
         cmake --build . --config Release -j 2
         cmake --build . --config Release --target install
+    - name: build-arm
+      run: |
+        mkdir build-arm; cd build-arm
+        cmake -T v142,host=x64 -A arm -DCMAKE_INSTALL_PREFIX=install -DNCNN_VERSION_STRING="${{ needs.setup.outputs.VERSION }}" -DNCNN_BUILD_EXAMPLES=OFF -DNCNN_BUILD_TOOLS=ON -DNCNN_BUILD_BENCHMARK=OFF ..
+        cmake --build . --config Release -j 2
+        cmake --build . --config Release --target install
+    - name: build-arm64
+      run: |
+        mkdir build-arm64; cd build-arm64
+        cmake -T v142,host=x64 -A arm64 -DCMAKE_INSTALL_PREFIX=install -DNCNN_VERSION_STRING="${{ needs.setup.outputs.VERSION }}" -DNCNN_BUILD_EXAMPLES=OFF -DNCNN_BUILD_TOOLS=ON -DNCNN_BUILD_BENCHMARK=OFF ..
+        cmake --build . --config Release -j 2
+        cmake --build . --config Release --target install
     - name: package
       run: |
         mkdir ${{ env.PACKAGENAME }}
@@ -1621,6 +1633,8 @@ jobs:
         mkdir ${{ env.PACKAGENAME }}/x64
         Copy-Item -Verbose -Recurse -Path "build-x86\install\*" -Destination "${{ env.PACKAGENAME }}\x86"
         Copy-Item -Verbose -Recurse -Path "build-x64\install\*" -Destination "${{ env.PACKAGENAME }}\x64"
+        Copy-Item -Verbose -Recurse -Path "build-arm\install\*" -Destination "${{ env.PACKAGENAME }}\arm"
+        Copy-Item -Verbose -Recurse -Path "build-arm64\install\*" -Destination "${{ env.PACKAGENAME }}\arm64"
         Copy-Item -Verbose -Path "build-x86\tools\caffe\Release\caffe2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\x86\bin"
         Copy-Item -Verbose -Path "build-x86\tools\mxnet\Release\mxnet2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\x86\bin"
         Copy-Item -Verbose -Path "build-x86\tools\onnx\Release\onnx2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\x86\bin"
@@ -1639,6 +1653,20 @@ jobs:
         Copy-Item -Verbose -Path "build-x64\tools\Release\ncnnmerge.exe" -Destination "${{ env.PACKAGENAME }}\x64\bin"
         Copy-Item -Verbose -Path "build-x64\tools\quantize\Release\ncnn2table.exe" -Destination "${{ env.PACKAGENAME }}\x64\bin"
         Copy-Item -Verbose -Path "build-x64\tools\quantize\Release\ncnn2int8.exe" -Destination "${{ env.PACKAGENAME }}\x64\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\mxnet\Release\mxnet2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\darknet\Release\darknet2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\Release\ncnnoptimize.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\Release\ncnn2mem.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\Release\ncnnmerge.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\quantize\Release\ncnn2table.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\quantize\Release\ncnn2int8.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\mxnet\Release\mxnet2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\darknet\Release\darknet2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\Release\ncnnoptimize.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\Release\ncnn2mem.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\Release\ncnnmerge.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\quantize\Release\ncnn2table.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\quantize\Release\ncnn2int8.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
         7z a -r ${{ env.PACKAGENAME }}.zip ${{ env.PACKAGENAME }}
     - name: upload-zip
       uses: actions/upload-artifact@v2
@@ -1697,6 +1725,18 @@ jobs:
         cmake -DCMAKE_INSTALL_PREFIX=install -DNCNN_VERSION_STRING="${{ needs.setup.outputs.VERSION }}" -DProtobuf_INCLUDE_DIR="$env:GITHUB_WORKSPACE\protobuf-install\x64\include" -DProtobuf_LIBRARIES="$env:GITHUB_WORKSPACE\protobuf-install\x64\lib\libprotobuf.lib" -DProtobuf_PROTOC_EXECUTABLE="$env:GITHUB_WORKSPACE\protobuf-install\x64\bin\protoc.exe" -DNCNN_VULKAN=ON -DNCNN_BUILD_EXAMPLES=OFF -DNCNN_BUILD_TOOLS=ON -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_SHARED_LIB=ON ..
         cmake --build . --config Release -j 2
         cmake --build . --config Release --target install
+    - name: build-arm
+      run: |
+        mkdir build-arm; cd build-arm
+        cmake -T v142,host=x64 -A arm -DCMAKE_INSTALL_PREFIX=install -DNCNN_VERSION_STRING="${{ needs.setup.outputs.VERSION }}" -DNCNN_BUILD_EXAMPLES=OFF -DNCNN_BUILD_TOOLS=ON -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_SHARED_LIB=ON ..
+        cmake --build . --config Release -j 2
+        cmake --build . --config Release --target install
+    - name: build-arm64
+      run: |
+        mkdir build-arm64; cd build-arm64
+        cmake -T v142,host=x64 -A arm64 -DCMAKE_INSTALL_PREFIX=install -DNCNN_VERSION_STRING="${{ needs.setup.outputs.VERSION }}" -DNCNN_BUILD_EXAMPLES=OFF -DNCNN_BUILD_TOOLS=ON -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_SHARED_LIB=ON ..
+        cmake --build . --config Release -j 2
+        cmake --build . --config Release --target install
     - name: package
       run: |
         mkdir ${{ env.PACKAGENAME }}
@@ -1704,6 +1744,8 @@ jobs:
         mkdir ${{ env.PACKAGENAME }}/x64
         Copy-Item -Verbose -Recurse -Path "build-x86\install\*" -Destination "${{ env.PACKAGENAME }}\x86"
         Copy-Item -Verbose -Recurse -Path "build-x64\install\*" -Destination "${{ env.PACKAGENAME }}\x64"
+        Copy-Item -Verbose -Recurse -Path "build-arm\install\*" -Destination "${{ env.PACKAGENAME }}\arm"
+        Copy-Item -Verbose -Recurse -Path "build-arm64\install\*" -Destination "${{ env.PACKAGENAME }}\arm64"
         Copy-Item -Verbose -Path "build-x86\tools\caffe\Release\caffe2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\x86\bin"
         Copy-Item -Verbose -Path "build-x86\tools\mxnet\Release\mxnet2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\x86\bin"
         Copy-Item -Verbose -Path "build-x86\tools\onnx\Release\onnx2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\x86\bin"
@@ -1722,6 +1764,20 @@ jobs:
         Copy-Item -Verbose -Path "build-x64\tools\Release\ncnnmerge.exe" -Destination "${{ env.PACKAGENAME }}\x64\bin"
         Copy-Item -Verbose -Path "build-x64\tools\quantize\Release\ncnn2table.exe" -Destination "${{ env.PACKAGENAME }}\x64\bin"
         Copy-Item -Verbose -Path "build-x64\tools\quantize\Release\ncnn2int8.exe" -Destination "${{ env.PACKAGENAME }}\x64\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\mxnet\Release\mxnet2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\darknet\Release\darknet2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\Release\ncnnoptimize.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\Release\ncnn2mem.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\Release\ncnnmerge.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\quantize\Release\ncnn2table.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm\tools\quantize\Release\ncnn2int8.exe" -Destination "${{ env.PACKAGENAME }}\arm\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\mxnet\Release\mxnet2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\darknet\Release\darknet2ncnn.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\Release\ncnnoptimize.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\Release\ncnn2mem.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\Release\ncnnmerge.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\quantize\Release\ncnn2table.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
+        Copy-Item -Verbose -Path "build-arm64\tools\quantize\Release\ncnn2int8.exe" -Destination "${{ env.PACKAGENAME }}\arm64\bin"
         7z a -r ${{ env.PACKAGENAME }}.zip ${{ env.PACKAGENAME }}
     - name: upload-zip
       uses: actions/upload-artifact@v2
diff --git a/.github/workflows/windows-arm-cpu-vs2019.yml b/.github/workflows/windows-arm-cpu-vs2019.yml
new file mode 100644
index 000000000..a628575eb
--- /dev/null
+++ b/.github/workflows/windows-arm-cpu-vs2019.yml
@@ -0,0 +1,40 @@
+name: windows-arm-cpu-vs2019
+on:
+  push:
+    branches: [master]
+    paths:
+    - '.github/workflows/windows-arm-cpu-vs2019.yml'
+    - 'CMakeLists.txt'
+    - 'cmake/**'
+    - 'src/*'
+    - 'src/layer/*'
+    - 'src/layer/arm/**'
+    - 'tests/**'
+  pull_request:
+    branches: [master]
+    paths:
+    - '.github/workflows/windows-arm-cpu-vs2019.yml'
+    - 'CMakeLists.txt'
+    - 'cmake/**'
+    - 'src/*'
+    - 'src/layer/*'
+    - 'src/layer/arm/**'
+    - 'tests/**'
+concurrency:
+  group: windows-arm-cpu-vs2019-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  windows-vs2019:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: build
+      run: |
+        mkdir build; cd build
+        cmake -T v142,host=x64 -A arm -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
+        cmake --build . --config Release -j 2
+    - name: build-shared
+      run: |
+        mkdir build-shared; cd build-shared
+        cmake -T v142,host=x64 -A arm -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF -DNCNN_SHARED_LIB=ON ..
+        cmake --build . --config Release -j 2
diff --git a/.github/workflows/windows-arm64-cpu-vs2019.yml b/.github/workflows/windows-arm64-cpu-vs2019.yml
new file mode 100644
index 000000000..fc9a9e672
--- /dev/null
+++ b/.github/workflows/windows-arm64-cpu-vs2019.yml
@@ -0,0 +1,40 @@
+name: windows-arm64-cpu-vs2019
+on:
+  push:
+    branches: [master]
+    paths:
+    - '.github/workflows/windows-arm64-cpu-vs2019.yml'
+    - 'CMakeLists.txt'
+    - 'cmake/**'
+    - 'src/*'
+    - 'src/layer/*'
+    - 'src/layer/arm/**'
+    - 'tests/**'
+  pull_request:
+    branches: [master]
+    paths:
+    - '.github/workflows/windows-arm64-cpu-vs2019.yml'
+    - 'CMakeLists.txt'
+    - 'cmake/**'
+    - 'src/*'
+    - 'src/layer/*'
+    - 'src/layer/arm/**'
+    - 'tests/**'
+concurrency:
+  group: windows-arm64-cpu-vs2019-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  windows-vs2019:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: build
+      run: |
+        mkdir build; cd build
+        cmake -T v142,host=x64 -A arm64 -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
+        cmake --build . --config Release -j 2
+    - name: build-shared
+      run: |
+        mkdir build-shared; cd build-shared
+        cmake -T v142,host=x64 -A arm64 -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF -DNCNN_SHARED_LIB=ON ..
+        cmake --build . --config Release -j 2
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d6503a5ed..37ead59d9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -145,12 +145,15 @@ endif()
 
 if((IOS AND CMAKE_OSX_ARCHITECTURES MATCHES "arm")
     OR (APPLE AND CMAKE_OSX_ARCHITECTURES MATCHES "arm64")
-    OR (CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm|aarch64)"))
+    OR (CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm|aarch64)")
+    OR ((CMAKE_CXX_COMPILER_ID MATCHES "MSVC" OR (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_SIMULATE_ID MATCHES "MSVC" AND CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES "MSVC")) AND (${CMAKE_GENERATOR_PLATFORM} MATCHES "^(arm|arm64)")))
     set(NCNN_TARGET_ARCH arm)
 
-    include(CheckCXXCompilerFlag)
-    check_cxx_compiler_flag("-march=armv8.2-a+fp16" NCNN_COMPILER_SUPPORT_ARM82_FP16)
-    check_cxx_compiler_flag("-march=armv8.2-a+fp16+dotprod" NCNN_COMPILER_SUPPORT_ARM82_FP16_DOTPROD)
+    if(NOT (CMAKE_CXX_COMPILER_ID MATCHES "MSVC" OR (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_SIMULATE_ID MATCHES "MSVC" AND CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES "MSVC")))
+        include(CheckCXXCompilerFlag)
+        check_cxx_compiler_flag("-march=armv8.2-a+fp16" NCNN_COMPILER_SUPPORT_ARM82_FP16)
+        check_cxx_compiler_flag("-march=armv8.2-a+fp16+dotprod" NCNN_COMPILER_SUPPORT_ARM82_FP16_DOTPROD)
+    endif()
 
     if(NCNN_COMPILER_SUPPORT_ARM82_FP16)
         option(NCNN_ARM82 "optimize aarch64 platform with armv8.2" ON)