function(ggml_add_cpu_backend_variant_impl tag_name)
    if (tag_name)
        set(GGML_CPU_NAME ggml-cpu-${tag_name})
    else()
        set(GGML_CPU_NAME ggml-cpu)
    endif()

    ggml_add_backend_library(${GGML_CPU_NAME})

    list (APPEND GGML_CPU_SOURCES
        ggml-cpu/ggml-cpu.c
        ggml-cpu/ggml-cpu.cpp
        ggml-cpu/ggml-cpu-aarch64.cpp
        ggml-cpu/ggml-cpu-aarch64.h
        ggml-cpu/ggml-cpu-hbm.cpp
        ggml-cpu/ggml-cpu-hbm.h
        ggml-cpu/ggml-cpu-quants.c
        ggml-cpu/ggml-cpu-quants.h
        ggml-cpu/ggml-cpu-traits.cpp
        ggml-cpu/ggml-cpu-traits.h
        ggml-cpu/amx/amx.cpp
        ggml-cpu/amx/amx.h
        ggml-cpu/amx/mmq.cpp
        ggml-cpu/amx/mmq.h
        ggml-cpu/ggml-cpu-impl.h
        )

    target_compile_features(${GGML_CPU_NAME} PRIVATE c_std_11 cxx_std_17)
    target_include_directories(${GGML_CPU_NAME} PRIVATE . ggml-cpu)

    if (APPLE AND GGML_ACCELERATE)
        find_library(ACCELERATE_FRAMEWORK Accelerate)
        if (ACCELERATE_FRAMEWORK)
            message(STATUS "Accelerate framework found")

            target_compile_definitions(${GGML_CPU_NAME} PRIVATE GGML_USE_ACCELERATE)
            target_compile_definitions(${GGML_CPU_NAME} PRIVATE ACCELERATE_NEW_LAPACK)
            target_compile_definitions(${GGML_CPU_NAME} PRIVATE ACCELERATE_LAPACK_ILP64)

            target_link_libraries(${GGML_CPU_NAME} PRIVATE ${ACCELERATE_FRAMEWORK})
        else()
            message(WARNING "Accelerate framework not found")
        endif()
    endif()

    if (GGML_OPENMP)
        find_package(OpenMP)
        if (OpenMP_FOUND)
            target_compile_definitions(${GGML_CPU_NAME} PRIVATE GGML_USE_OPENMP)

            target_link_libraries(${GGML_CPU_NAME} PRIVATE OpenMP::OpenMP_C OpenMP::OpenMP_CXX)
        else()
            message(WARNING "OpenMP not found")
        endif()
    endif()

    if (GGML_LLAMAFILE)
        target_compile_definitions(${GGML_CPU_NAME} PRIVATE GGML_USE_LLAMAFILE)

        list(APPEND GGML_CPU_SOURCES
                    ggml-cpu/llamafile/sgemm.cpp
                    ggml-cpu/llamafile/sgemm.h)
    endif()

    if (GGML_CPU_HBM)
        find_library(memkind memkind REQUIRED)

        message(STATUS "Using memkind for CPU HBM")

        target_compile_definitions(${GGML_CPU_NAME} PRIVATE GGML_USE_CPU_HBM)

        target_link_libraries(${GGML_CPU_NAME} PUBLIC memkind)
    endif()

    if (CMAKE_OSX_ARCHITECTURES      STREQUAL "arm64" OR
        CMAKE_GENERATOR_PLATFORM_LWR STREQUAL "arm64" OR
        (NOT CMAKE_OSX_ARCHITECTURES AND NOT CMAKE_GENERATOR_PLATFORM_LWR AND
            CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64|arm.*|ARM64)$"))

        message(STATUS "ARM detected")

        if (MSVC AND NOT CMAKE_C_COMPILER_ID STREQUAL "Clang")
            message(FATAL_ERROR "MSVC is not supported for ARM, use clang")
        else()
            check_cxx_compiler_flag(-mfp16-format=ieee GGML_COMPILER_SUPPORTS_FP16_FORMAT_I3E)
            if (NOT "${GGML_COMPILER_SUPPORTS_FP16_FORMAT_I3E}" STREQUAL "")
                list(APPEND ARCH_FLAGS -mfp16-format=ieee)
            endif()

            if (GGML_NATIVE)
                # -mcpu=native does not always enable all the features in some compilers,
                # so we check for them manually and enable them if available

                execute_process(
                    COMMAND ${CMAKE_C_COMPILER} -mcpu=native -E -v -
                    INPUT_FILE "/dev/null"
                    OUTPUT_QUIET
                    ERROR_VARIABLE ARM_MCPU
                    RESULT_VARIABLE ARM_MCPU_RESULT
                )
                if (NOT ARM_MCPU_RESULT)
                    string(REGEX MATCH "-mcpu=[^ ']+" ARM_MCPU_FLAG "${ARM_MCPU}")
                endif()
                if ("${ARM_MCPU_FLAG}" STREQUAL "")
                    set(ARM_MCPU_FLAG -mcpu=native)
                    message(STATUS "ARM -mcpu not found, -mcpu=native will be used")
                endif()

                include(CheckCXXSourceRuns)

                function(check_arm_feature tag code)
                    set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
                    set(CMAKE_REQUIRED_FLAGS "${ARM_MCPU_FLAG}+${tag}")
                    check_cxx_source_runs(
                        "${code}"
                        GGML_MACHINE_SUPPORTS_${tag}
                    )
                    if (GGML_MACHINE_SUPPORTS_${tag})
                        set(ARM_MCPU_FLAG_FIX "${ARM_MCPU_FLAG_FIX}+${tag}" PARENT_SCOPE)
                    else()
                        set(ARM_MCPU_FLAG_FIX "${ARM_MCPU_FLAG_FIX}+no${tag}" PARENT_SCOPE)
                    endif()
                    set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
                endfunction()

                check_arm_feature(dotprod "#include <arm_neon.h>\nint main() { int8x16_t _a, _b; volatile int32x4_t _s = vdotq_s32(_s, _a, _b); return 0; }")
                check_arm_feature(i8mm    "#include <arm_neon.h>\nint main() { int8x16_t _a, _b; volatile int32x4_t _s = vmmlaq_s32(_s, _a, _b); return 0; }")
                check_arm_feature(sve     "#include <arm_sve.h>\nint main()  { svfloat32_t _a, _b; volatile svfloat32_t _c = svadd_f32_z(svptrue_b8(), _a, _b); return 0; }")

                list(APPEND ARCH_FLAGS "${ARM_MCPU_FLAG}${ARM_MCPU_FLAG_FIX}")
            else()
                if (GGML_CPU_ARM_ARCH)
                    list(APPEND ARCH_FLAGS -march=${GGML_CPU_ARM_ARCH})
                endif()
            endif()

            # show enabled features
            if (CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
                set(FEAT_INPUT_FILE "NUL")
            else()
                set(FEAT_INPUT_FILE "/dev/null")
            endif()

            execute_process(
                COMMAND ${CMAKE_C_COMPILER} ${ARCH_FLAGS} -dM -E -
                INPUT_FILE ${FEAT_INPUT_FILE}
                OUTPUT_VARIABLE ARM_FEATURE
                RESULT_VARIABLE ARM_FEATURE_RESULT
            )
            if (ARM_FEATURE_RESULT)
                message(WARNING "Failed to get ARM features")
            else()
                foreach(feature DOTPROD SVE MATMUL_INT8 FMA FP16_VECTOR_ARITHMETIC)
                    string(FIND "${ARM_FEATURE}" "__ARM_FEATURE_${feature} 1" feature_pos)
                    if (NOT ${feature_pos} EQUAL -1)
                        message(STATUS "ARM feature ${feature} enabled")
                    endif()
                endforeach()
            endif()
        endif()
    elseif (CMAKE_OSX_ARCHITECTURES STREQUAL "x86_64" OR CMAKE_GENERATOR_PLATFORM_LWR MATCHES "^(x86_64|i686|amd64|x64|win32)$" OR
            (NOT CMAKE_OSX_ARCHITECTURES AND NOT CMAKE_GENERATOR_PLATFORM_LWR AND
            CMAKE_SYSTEM_PROCESSOR MATCHES "^(x86_64|i686|AMD64|amd64)$"))

        message(STATUS "x86 detected")

        if (MSVC)
            # instruction set detection for MSVC only
            if (GGML_NATIVE)
                include(ggml-cpu/cmake/FindSIMD.cmake)
            endif ()
            if (GGML_AVX512)
                list(APPEND ARCH_FLAGS /arch:AVX512)
                # /arch:AVX512 includes: __AVX512F__, __AVX512CD__, __AVX512BW__, __AVX512DQ__, and __AVX512VL__
                # MSVC has no compile-time flags enabling specific
                # AVX512 extensions, neither it defines the
                # macros corresponding to the extensions.
                # Do it manually.
                list(APPEND ARCH_DEFINITIONS GGML_AVX512)
                if (GGML_AVX512_VBMI)
                    list(APPEND ARCH_DEFINITIONS __AVX512VBMI__)
                    if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
                        list(APPEND ARCH_FLAGS -mavx512vbmi)
                    endif()
                endif()
                if (GGML_AVX512_VNNI)
                    list(APPEND ARCH_DEFINITIONS __AVX512VNNI__ GGML_AVX512_VNNI)
                    if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
                        list(APPEND ARCH_FLAGS -mavx512vnni)
                    endif()
                endif()
                if (GGML_AVX512_BF16)
                    list(APPEND ARCH_DEFINITIONS __AVX512BF16__ GGML_AVX512_BF16)
                    if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
                        list(APPEND ARCH_FLAGS -mavx512bf16)
                    endif()
                endif()
                if (GGML_AMX_TILE)
                    list(APPEND ARCH_DEFINITIONS __AMX_TILE__ GGML_AMX_TILE)
                endif()
                if (GGML_AMX_INT8)
                    list(APPEND ARCH_DEFINITIONS __AMX_INT8__ GGML_AMX_INT8)
                endif()
                if (GGML_AMX_BF16)
                    list(APPEND ARCH_DEFINITIONS __AMX_BF16__ GGML_AMX_BF16)
                endif()
            elseif (GGML_AVX2)
                list(APPEND ARCH_FLAGS /arch:AVX2)
                list(APPEND ARCH_DEFINITIONS GGML_AVX2 GGML_FMA GGML_F16C)
            elseif (GGML_AVX)
                list(APPEND ARCH_FLAGS /arch:AVX)
                list(APPEND ARCH_DEFINITIONS GGML_AVX)
            else ()
                list(APPEND ARCH_FLAGS /arch:SSE4.2)
                list(APPEND ARCH_DEFINITIONS GGML_SSE42)
            endif()
            if (GGML_AVX_VNNI)
                list(APPEND ARCH_DEFINITIONS __AVXVNNI__ GGML_AVX_VNNI)
            endif()
        else ()
            if (GGML_NATIVE)
                list(APPEND ARCH_FLAGS -march=native)
            else ()
                list(APPEND ARCH_FLAGS -msse4.2)
                list(APPEND ARCH_DEFINITIONS GGML_SSE42)
                if (GGML_F16C)
                    list(APPEND ARCH_FLAGS -mf16c)
                    list(APPEND ARCH_DEFINITIONS GGML_F16C)
                endif()
                if (GGML_FMA)
                    list(APPEND ARCH_FLAGS -mfma)
                    list(APPEND ARCH_DEFINITIONS GGML_FMA)
                endif()
                if (GGML_AVX)
                    list(APPEND ARCH_FLAGS -mavx)
                    list(APPEND ARCH_DEFINITIONS GGML_AVX)
                endif()
                if (GGML_AVX2)
                    list(APPEND ARCH_FLAGS -mavx2)
                    list(APPEND ARCH_DEFINITIONS GGML_AVX2)
                endif()
                if (GGML_AVX_VNNI)
                    list(APPEND ARCH_FLAGS -mavxvnni)
                    list(APPEND ARCH_DEFINITIONS GGML_AVX_VNNI)
                endif()
                if (GGML_AVX512)
                    list(APPEND ARCH_FLAGS -mavx512f)
                    list(APPEND ARCH_FLAGS -mavx512cd)
                    list(APPEND ARCH_FLAGS -mavx512vl)
                    list(APPEND ARCH_FLAGS -mavx512dq)
                    list(APPEND ARCH_FLAGS -mavx512bw)
                    list(APPEND ARCH_DEFINITIONS GGML_AVX512)
                endif()
                if (GGML_AVX512_VBMI)
                    list(APPEND ARCH_FLAGS -mavx512vbmi)
                    list(APPEND ARCH_DEFINITIONS GGML_AVX512_VBMI)
                endif()
                if (GGML_AVX512_VNNI)
                    list(APPEND ARCH_FLAGS -mavx512vnni)
                    list(APPEND ARCH_DEFINITIONS GGML_AVX512_VNNI)
                endif()
                if (GGML_AVX512_BF16)
                    list(APPEND ARCH_FLAGS -mavx512bf16)
                    list(APPEND ARCH_DEFINITIONS GGML_AVX512_BF16)
                endif()
                if (GGML_AMX_TILE)
                    list(APPEND ARCH_FLAGS -mamx-tile)
                    list(APPEND ARCH_DEFINITIONS GGML_AMX_TILE)
                endif()
                if (GGML_AMX_INT8)
                    list(APPEND ARCH_FLAGS -mamx-int8)
                    list(APPEND ARCH_DEFINITIONS GGML_AMX_INT8)
                endif()
                if (GGML_AMX_BF16)
                    list(APPEND ARCH_FLAGS -mamx-bf16)
                    list(APPEND ARCH_DEFINITIONS GGML_AMX_BF16)
                endif()
            endif()
        endif()
    elseif (${CMAKE_SYSTEM_PROCESSOR} MATCHES "ppc64")
        message(STATUS "PowerPC detected")
        execute_process(COMMAND bash -c "grep POWER10 /proc/cpuinfo | head -n 1" OUTPUT_VARIABLE POWER10_M)
        string(FIND "${POWER10_M}" "POWER10" substring_index)
        if (NOT DEFINED substring_index OR "${substring_index}" STREQUAL "")
            set(substring_index -1)
        endif()

        if (${substring_index} GREATER_EQUAL 0)
        list(APPEND ARCH_FLAGS -mcpu=power10)
        elseif (${CMAKE_SYSTEM_PROCESSOR} MATCHES "ppc64le")
        list(APPEND ARCH_FLAGS -mcpu=powerpc64le)
        else()
            list(APPEND ARCH_FLAGS -mcpu=native -mtune=native)
            # TODO: Add  targets for Power8/Power9 (Altivec/VSX) and Power10(MMA) and query for big endian systems (ppc64/le/be)
        endif()
    elseif (${CMAKE_SYSTEM_PROCESSOR} MATCHES "loongarch64")
        message(STATUS "loongarch64 detected")

        list(APPEND ARCH_FLAGS -march=loongarch64)
        if (GGML_LASX)
            list(APPEND ARCH_FLAGS -mlasx)
        endif()
        if (GGML_LSX)
            list(APPEND ARCH_FLAGS -mlsx)
        endif()
    elseif (${CMAKE_SYSTEM_PROCESSOR} MATCHES "riscv64")
        message(STATUS "RISC-V detected")
        if (GGML_RVV)
            list(APPEND ARCH_FLAGS -march=rv64gcv -mabi=lp64d)
        endif()
    else()
        message(STATUS "Unknown architecture")
    endif()

    if (GGML_CPU_AARCH64)
        target_compile_definitions(${GGML_CPU_NAME} PRIVATE GGML_USE_CPU_AARCH64)
    endif()

    message(STATUS "Adding CPU backend variant ${GGML_CPU_NAME}: ${ARCH_FLAGS} ${ARCH_DEFINITIONS}")
    target_sources(${GGML_CPU_NAME} PRIVATE ${GGML_CPU_SOURCES})
    target_compile_options(${GGML_CPU_NAME} PRIVATE ${ARCH_FLAGS})
    target_compile_definitions(${GGML_CPU_NAME} PRIVATE ${ARCH_DEFINITIONS})

    if (GGML_BACKEND_DL)
        if (GGML_NATIVE)
            # the feature check relies on ARCH_DEFINITIONS, but it is not set with GGML_NATIVE
            message(FATAL_ERROR "GGML_NATIVE is not compatible with GGML_BACKEND_DL, consider using GGML_CPU_ALL_VARIANTS")
        endif()

        # The feature detection code is compiled as a separate target so that
        # it can be built without the architecture flags
        # Since multiple variants of the CPU backend may be included in the same
        # build, using set_source_files_properties() to set the arch flags is not possible
        set(GGML_CPU_FEATS_NAME ${GGML_CPU_NAME}-feats)
        add_library(${GGML_CPU_FEATS_NAME} OBJECT ggml-cpu/cpu-feats-x86.cpp)
        target_include_directories(${GGML_CPU_FEATS_NAME} PRIVATE . .. ../include)
        target_compile_definitions(${GGML_CPU_FEATS_NAME} PRIVATE ${ARCH_DEFINITIONS})
        target_compile_definitions(${GGML_CPU_FEATS_NAME} PRIVATE GGML_BACKEND_DL GGML_BACKEND_BUILD GGML_BACKEND_SHARED)
        set_target_properties(${GGML_CPU_FEATS_NAME} PROPERTIES POSITION_INDEPENDENT_CODE ON)
        target_link_libraries(${GGML_CPU_NAME} PRIVATE ${GGML_CPU_FEATS_NAME})
    endif()

    if (EMSCRIPTEN)
        set_target_properties(${GGML_CPU_NAME} PROPERTIES COMPILE_FLAGS "-msimd128")
    endif()
endfunction()