diff --git a/.github/workflows/linux-x64-cpu-gcc.yml b/.github/workflows/linux-x64-cpu-gcc.yml
index ab2185be3e7..580000b498e 100644
--- a/.github/workflows/linux-x64-cpu-gcc.yml
+++ b/.github/workflows/linux-x64-cpu-gcc.yml
@@ -1,33 +1,33 @@
 name: linux-x64-cpu-gcc
 on:
   push:
-    branches: [master]
+    # branches: [master]
     paths:
-    - '.github/workflows/linux-x64-cpu-gcc.yml'
-    - 'toolchains/host-c.gcc.toolchain.cmake'
-    - 'CMakeLists.txt'
-    - 'cmake/**'
-    - 'src/*'
-    - 'src/layer/*'
-    - 'src/layer/x86/**'
-    - 'tests/**'
-    - 'tools/**'
-    - '!tools/pnnx/**'
-    - 'examples/**'
+      - ".github/workflows/linux-x64-cpu-gcc.yml"
+      - "toolchains/host-c.gcc.toolchain.cmake"
+      - "CMakeLists.txt"
+      - "cmake/**"
+      - "src/*"
+      - "src/layer/*"
+      - "src/layer/x86/**"
+      - "tests/**"
+      - "tools/**"
+      - "!tools/pnnx/**"
+      - "examples/**"
   pull_request:
-    branches: [master]
+    # branches: [master]
     paths:
-    - '.github/workflows/linux-x64-cpu-gcc.yml'
-    - 'toolchains/host-c.gcc.toolchain.cmake'
-    - 'CMakeLists.txt'
-    - 'cmake/**'
-    - 'src/*'
-    - 'src/layer/*'
-    - 'src/layer/x86/**'
-    - 'tests/**'
-    - 'tools/**'
-    - '!tools/pnnx/**'
-    - 'examples/**'
+      - ".github/workflows/linux-x64-cpu-gcc.yml"
+      - "toolchains/host-c.gcc.toolchain.cmake"
+      - "CMakeLists.txt"
+      - "cmake/**"
+      - "src/*"
+      - "src/layer/*"
+      - "src/layer/x86/**"
+      - "tests/**"
+      - "tools/**"
+      - "!tools/pnnx/**"
+      - "examples/**"
 concurrency:
   group: linux-x64-cpu-gcc-${{ github.ref }}
   cancel-in-progress: true
@@ -38,97 +38,97 @@ jobs:
   linux-gcc:
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@v4
-    - name: update
-      run: sudo apt-get update
-    - name: protobuf
-      run: sudo apt-get install libprotobuf-dev protobuf-compiler libopencv-dev
-    - name: build-sse2
-      run: |
-        mkdir build-sse2 && cd build-sse2
-        cmake -DNCNN_AVX=OFF -DNCNN_AVX2=OFF -DNCNN_BUILD_TESTS=ON ..
-        cmake --build . -j $(nproc)
-    - name: test-sse2
-      run: cd build-sse2 && ctest --output-on-failure -j $(nproc)
-    - name: build-shared
-      run: |
-        mkdir build-shared && cd build-shared
-        cmake -DNCNN_AVX2=ON -DNCNN_SHARED_LIB=ON ..
-        cmake --build . -j $(nproc)
-    - name: build-avx2
-      run: |
-        mkdir build-avx2 && cd build-avx2
-        cmake -DNCNN_AVX2=ON -DNCNN_BUILD_TESTS=ON ..
-        cmake --build . -j $(nproc)
-    - name: test-avx2
-      run: cd build-avx2 && ctest --output-on-failure -j $(nproc)
-    - name: build-avx
-      run: |
-        mkdir build-avx && cd build-avx
-        cmake -DNCNN_AVX2=OFF -DNCNN_AVX=ON -DNCNN_BUILD_TESTS=ON ..
-        cmake --build . -j $(nproc)
-    - name: test-avx
-      run: cd build-avx && ctest --output-on-failure -j $(nproc)
-    - name: build-avx1-2
-      run: |
-        mkdir build-avx1-2 && cd build-avx1-2
-        cmake -DNCNN_AVX2=ON -DNCNN_AVX=ON -DNCNN_BUILD_TESTS=ON ..
-        cmake --build . -j $(nproc)
-    - name: test-avx1-2
-      run: cd build-avx1-2 && ctest --output-on-failure -j $(nproc)
-    - name: build-noint8
-      run: |
-        mkdir build-noint8 && cd build-noint8
-        cmake -DNCNN_INT8=OFF -DNCNN_BUILD_TESTS=ON ..
-        cmake --build . -j $(nproc)
-    - name: test-noint8
-      run: cd build-noint8 && ctest --output-on-failure -j $(nproc)
+      - uses: actions/checkout@v4
+      - name: update
+        run: sudo apt-get update
+      - name: protobuf
+        run: sudo apt-get install libprotobuf-dev protobuf-compiler libopencv-dev
+      - name: build-sse2
+        run: |
+          mkdir build-sse2 && cd build-sse2
+          cmake -DNCNN_AVX=OFF -DNCNN_AVX2=OFF -DNCNN_BUILD_TESTS=ON ..
+          cmake --build . -j $(nproc)
+      - name: test-sse2
+        run: cd build-sse2 && ctest --output-on-failure -j $(nproc)
+      - name: build-shared
+        run: |
+          mkdir build-shared && cd build-shared
+          cmake -DNCNN_AVX2=ON -DNCNN_SHARED_LIB=ON ..
+          cmake --build . -j $(nproc)
+      - name: build-avx2
+        run: |
+          mkdir build-avx2 && cd build-avx2
+          cmake -DNCNN_AVX2=ON -DNCNN_BUILD_TESTS=ON ..
+          cmake --build . -j $(nproc)
+      - name: test-avx2
+        run: cd build-avx2 && ctest --output-on-failure -j $(nproc)
+      - name: build-avx
+        run: |
+          mkdir build-avx && cd build-avx
+          cmake -DNCNN_AVX2=OFF -DNCNN_AVX=ON -DNCNN_BUILD_TESTS=ON ..
+          cmake --build . -j $(nproc)
+      - name: test-avx
+        run: cd build-avx && ctest --output-on-failure -j $(nproc)
+      - name: build-avx1-2
+        run: |
+          mkdir build-avx1-2 && cd build-avx1-2
+          cmake -DNCNN_AVX2=ON -DNCNN_AVX=ON -DNCNN_BUILD_TESTS=ON ..
+          cmake --build . -j $(nproc)
+      - name: test-avx1-2
+        run: cd build-avx1-2 && ctest --output-on-failure -j $(nproc)
+      - name: build-noint8
+        run: |
+          mkdir build-noint8 && cd build-noint8
+          cmake -DNCNN_INT8=OFF -DNCNN_BUILD_TESTS=ON ..
+          cmake --build . -j $(nproc)
+      - name: test-noint8
+        run: cd build-noint8 && ctest --output-on-failure -j $(nproc)
 
   linux-gcc-cpp03-nostdio-nostring-simplestl:
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@v4
-    - name: build-nostdio
-      run: |
-        mkdir build-nostdio && cd build-nostdio
-        cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/host.gcc-c++03.toolchain.cmake -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
-        cmake --build . -j $(nproc)
-    - name: test-nostdio
-      run: cd build-nostdio && ctest --output-on-failure -j $(nproc)
-    - name: build-nostdio-nostring
-      run: |
-        mkdir build-nostdio-nostring && cd build-nostdio-nostring
-        cmake -DNCNN_STDIO=OFF -DNCNN_STRING=OFF -DNCNN_BUILD_TESTS=OFF -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
-        cmake --build . -j $(nproc)
-    - name: build-simplestl
-      run: |
-        mkdir build-simplestl && cd build-simplestl
-        cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/host-c.gcc.toolchain.cmake -DNCNN_STDIO=ON -DNCNN_STRING=ON -DNCNN_SIMPLESTL=ON -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
-        cmake --build . -j $(nproc)
-    - name: test-simplestl
-      run: cd build-simplestl && ctest --output-on-failure -j $(nproc)
-    - name: build-simplestl-simpleomp
-      run: |
-        mkdir build-simplestl-simpleomp && cd build-simplestl-simpleomp
-        cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/host-c.gcc.toolchain.cmake -DNCNN_STDIO=ON -DNCNN_STRING=ON -DNCNN_SIMPLESTL=ON -DNCNN_SIMPLEOMP=ON -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
-        cmake --build . -j $(nproc)
-    - name: test-simplestl-simpleomp
-      run: cd build-simplestl-simpleomp && ctest --output-on-failure -j $(nproc)
+      - uses: actions/checkout@v4
+      - name: build-nostdio
+        run: |
+          mkdir build-nostdio && cd build-nostdio
+          cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/host.gcc-c++03.toolchain.cmake -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
+          cmake --build . -j $(nproc)
+      - name: test-nostdio
+        run: cd build-nostdio && ctest --output-on-failure -j $(nproc)
+      - name: build-nostdio-nostring
+        run: |
+          mkdir build-nostdio-nostring && cd build-nostdio-nostring
+          cmake -DNCNN_STDIO=OFF -DNCNN_STRING=OFF -DNCNN_BUILD_TESTS=OFF -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
+          cmake --build . -j $(nproc)
+      - name: build-simplestl
+        run: |
+          mkdir build-simplestl && cd build-simplestl
+          cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/host-c.gcc.toolchain.cmake -DNCNN_STDIO=ON -DNCNN_STRING=ON -DNCNN_SIMPLESTL=ON -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
+          cmake --build . -j $(nproc)
+      - name: test-simplestl
+        run: cd build-simplestl && ctest --output-on-failure -j $(nproc)
+      - name: build-simplestl-simpleomp
+        run: |
+          mkdir build-simplestl-simpleomp && cd build-simplestl-simpleomp
+          cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/host-c.gcc.toolchain.cmake -DNCNN_STDIO=ON -DNCNN_STRING=ON -DNCNN_SIMPLESTL=ON -DNCNN_SIMPLEOMP=ON -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_BENCHMARK=OFF -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
+          cmake --build . -j $(nproc)
+      - name: test-simplestl-simpleomp
+        run: cd build-simplestl-simpleomp && ctest --output-on-failure -j $(nproc)
 
   linux-gcc-avx512:
     runs-on: [self-hosted, linux, t4]
     steps:
-    - uses: actions/checkout@v4
-    - name: build
-      env:
-        CC: gcc
-        CXX: g++
-        LD_LIBRARY_PATH: /data/action/install/lib64
-      run: |
-        mkdir build && cd build
-        cmake -DNCNN_AVX2=ON -DNCNN_AVX512=ON -DNCNN_AVX512VNNI=ON -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
-        cmake --build . -j 4
-    - name: test
-      env:
-        LD_LIBRARY_PATH: /data/action/install/lib64
-      run: cd build && ctest --output-on-failure -j 4
+      - uses: actions/checkout@v4
+      - name: build
+        env:
+          CC: gcc
+          CXX: g++
+          LD_LIBRARY_PATH: /data/action/install/lib64
+        run: |
+          mkdir build && cd build
+          cmake -DNCNN_AVX2=ON -DNCNN_AVX512=ON -DNCNN_AVX512VNNI=ON -DNCNN_BUILD_TESTS=ON -DNCNN_BUILD_TOOLS=OFF -DNCNN_BUILD_EXAMPLES=OFF ..
+          cmake --build . -j 4
+      - name: test
+        env:
+          LD_LIBRARY_PATH: /data/action/install/lib64
+        run: cd build && ctest --output-on-failure -j 4
diff --git a/src/layer/flip.cpp b/src/layer/flip.cpp
index 6757b853f80..15ddc7e05a8 100644
--- a/src/layer/flip.cpp
+++ b/src/layer/flip.cpp
@@ -180,7 +180,8 @@ int Flip::forward(const Mat& bottom_blob, Mat& top_blob, const Option& opt) cons
                         // 组合两种翻转：channel维度和行维度同时翻转
                         const float* ptr = bottom_blob.channel(channels - 1 - i).row(h - 1 - j);
                         float* outptr = top_blob.channel(i).row(j);
-                        memcpy(outptr, ptr, w * sizeof(float));
+                        // memcpy(outptr, ptr, w * sizeof(float)); ctest修复测试
+                        memcpy(outptr, ptr, w * elemsize);
                     }
                 }
             }