Add LoongArch64 support

.github/toolchains/gcc-loongarch64-linux-gnu.cmake

@@ -0,0 +1,4 @@
+set(CMAKE_SYSTEM_PROCESSOR loongarch64)
+set(triple loongarch64-linux-gnu)
+
+include(${CMAKE_CURRENT_LIST_DIR}/gcc.cmake)

.github/workflows/cross-loongarch.yml

@@ -0,0 +1,65 @@
+name: LoongArch64 cross-compilation build
+on: [push, pull_request]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.job }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: 'LoongArch64 ${{ matrix.simd.name }}'
+    strategy:
+      fail-fast: false
+      matrix:
+        simd:
+          - { name: 'LSX', flags: '-mlsx' }
+          - { name: 'LASX', flags: '-mlasx' }
+    steps:
+    - name: Setup compiler
+      run: |
+        sudo apt-get -y -qq update
+        sudo apt-get -y -qq --no-install-suggests --no-install-recommends install \
+          gcc-14-loongarch64-linux-gnu \
+          g++-14-loongarch64-linux-gnu
+        sudo update-alternatives --install /usr/bin/loongarch64-linux-gnu-gcc \
+          loongarch64-linux-gnu-gcc /usr/bin/loongarch64-linux-gnu-gcc-14 20
+        sudo update-alternatives --install /usr/bin/loongarch64-linux-gnu-g++ \
+          loongarch64-linux-gnu-g++ /usr/bin/loongarch64-linux-gnu-g++-14 20
+        loongarch64-linux-gnu-g++ --version
+    - name: Setup QEMU
+      run: |
+        sudo apt-get -y -qq update
+        sudo apt-get -y -qq --no-install-suggests --no-install-recommends install qemu-user-static
+        qemu-loongarch64-static --version
+    - name: Setup Ninja
+      run: |
+        sudo apt-get -y -qq install ninja-build
+    - name: Checkout xsimd
+      uses: actions/checkout@v6
+    - name: Setup
+      run: >-
+        cmake -S . -B _build
+        -GNinja
+        -DBUILD_TESTS=ON
+        -DDOWNLOAD_DOCTEST=ON
+        -DCMAKE_BUILD_TYPE=Release
+        -DTARGET_ARCH=generic
+        -DCMAKE_C_FLAGS="${{ matrix.simd.flags }}"
+        -DCMAKE_CXX_FLAGS="${{ matrix.simd.flags }}"
+        -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/.github/toolchains/gcc-loongarch64-linux-gnu.cmake
+    - name: Build
+      run: cmake --build _build
+    - name: Set CPU feature test expectations
+      run: |
+        echo "XSIMD_TEST_CPU_ASSUME_SSE4_2=0" >> "$GITHUB_ENV"
+        echo "XSIMD_TEST_CPU_ASSUME_NEON64=0" >> "$GITHUB_ENV"
+        echo "XSIMD_TEST_CPU_ASSUME_SVE=0" >> "$GITHUB_ENV"
+        echo "XSIMD_TEST_CPU_ASSUME_RVV=0" >> "$GITHUB_ENV"
+        echo "XSIMD_TEST_CPU_ASSUME_LSX=1" >> "$GITHUB_ENV"
+        echo "XSIMD_TEST_CPU_ASSUME_LASX=1" >> "$GITHUB_ENV"
+        echo "XSIMD_TEST_CPU_ASSUME_VSX=0" >> "$GITHUB_ENV"
+        echo "XSIMD_TEST_CPU_ASSUME_VXE=0" >> "$GITHUB_ENV"
+        echo "XSIMD_TEST_CPU_ASSUME_MANUFACTURER=unknown" >> "$GITHUB_ENV"
+    - name: Testing xsimd
+      timeout-minutes: 15
+      run: qemu-loongarch64-static -L /usr/loongarch64-linux-gnu ./test/test_xsimd
+      working-directory: ${{ github.workspace }}/_build

README.md

@@ -62,6 +62,7 @@ ARM          | NEON, NEON64, SVE128/256/512 (fixed vector size)
 WebAssembly  | WASM
 powerpc64    | VSX
 RISC-V       | RISC-V128/256/512 (fixed vector size)
+LoongArch64  | LSX, LASX
 IBM Z (s390x)| VXE (IBM z14)
 
 ## Installation

docs/Doxyfile

@@ -24,6 +24,7 @@ INPUT             = ../include/xsimd/types/xsimd_api.hpp \
                     ../include/xsimd/types/xsimd_neon64_register.hpp \
                     ../include/xsimd/types/xsimd_neon_register.hpp \
                     ../include/xsimd/types/xsimd_rvv_register.hpp \
+                    ../include/xsimd/types/xsimd_lsx_register.hpp \
                     ../include/xsimd/types/xsimd_sse2_register.hpp \
                     ../include/xsimd/types/xsimd_sse3_register.hpp \
                     ../include/xsimd/types/xsimd_sse4_1_register.hpp \

include/xsimd/arch/xsimd_isa.hpp

@@ -154,6 +154,10 @@
 #include "./xsimd_rvv.hpp"
 #endif
 
+#if XSIMD_WITH_LSX || XSIMD_WITH_LASX
+#include "./xsimd_lsx.hpp"
+#endif
+
 #if XSIMD_WITH_WASM
 #include "./xsimd_wasm.hpp"
 #endif