/*******************************************************************************
* Copyright 2019 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/

#include <cstdint>
#include <memory>
#include <mutex>

#include "oneapi/dnnl/dnnl_types.h"

#include "common/bfloat16.hpp"
#include "common/dnnl_traits.hpp"

#include "cpu/gemm/gemm.hpp"

#include "cpu/x64/cpu_isa_traits.hpp"
#include "cpu/x64/jit_generator.hpp"

#include "cpu/x64/gemm/gemm_info.hpp"

#include "cpu/x64/gemm/amx/jit_avx512_core_amx_copy_kern.hpp"
#include "cpu/x64/gemm/amx/jit_avx512_core_amx_gemm_kern.hpp"

#include "cpu/x64/gemm/bf16/common_s16.hpp"
#include "cpu/x64/gemm/bf16/jit_avx512_core_gemm_bf16bf16f32_kern.hpp"
#include "cpu/x64/gemm/bf16/jit_avx512_core_gemv_bf16bf16f32_kern.hpp"

#include "cpu/x64/gemm/f32/common_f32.hpp"
#include "cpu/x64/gemm/f32/jit_avx2_kernel_sgemm_kern.hpp"
#include "cpu/x64/gemm/f32/jit_avx_gemv_t_f32_kern.hpp"
#include "cpu/x64/gemm/f32/jit_sse41_gemv_n_f32_kern.hpp"
#include "cpu/x64/gemm/f32/jit_sse41_gemv_t_f32_kern.hpp"

#include "cpu/x64/gemm/s8x8s32/common_u8.hpp"
#include "cpu/x64/gemm/s8x8s32/jit_avx2_gemm_s8u8s32_kern.hpp"
#include "cpu/x64/gemm/s8x8s32/jit_avx512_core_gemm_s8u8s32_kern.hpp"
#include "cpu/x64/gemm/s8x8s32/jit_avx512_core_kernel_gemv_s8x8s32_kern.hpp"

namespace dnnl {
namespace impl {
namespace cpu {
namespace x64 {

static inline int decode_trans(char trans) {
    switch (trans) {
        case 'T':
        case 't': return do_trans;
        case 'P':
        case 'p': return packed;
        default: return no_trans;
    }
}

namespace {
template <typename b_t> // XXX for float and bfloat
void prepare_bo(int32_t &bo_gemm_info, const b_t *bo_orig) {
    UNUSED(bo_orig);
    bo_gemm_info = 0;
}
template <>
void prepare_bo(int32_t &bo_gemm_info, const uint8_t *bo_orig) {
    bo_gemm_info = bo_orig ? *bo_orig : 0;
}
template <>
void prepare_bo(int32_t &bo_gemm_info, const int8_t *bo_orig) {
    int bo_s32 = bo_orig ? *bo_orig : 0;
    if (!mayiuse(avx512_core_amx) && __BUILD_GEMM_AMX) bo_s32 += 128;
    bo_gemm_info = bo_s32;
}

} // namespace

template <typename a_t, typename b_t, typename c_t>
gemm_info_t<a_t, b_t, c_t>::gemm_info_t(const char *transA, const char *transB,
        const char *offsetC, const dim_t *m, const dim_t *n, const dim_t *k,
        const float *alpha, const a_t *a, const dim_t *lda, const a_t *oa,
        const b_t *b, const dim_t *ldb, const b_t *ob, const float *beta,
        c_t *c, const dim_t *ldc, const c_t *oc, bool force_nocopy,
        pack_type packing, gemm_pack_storage_t *pack_dst, bool measure_only)
    : transa(decode_trans(*transA))
    , transb(decode_trans(*transB))
    , offsetc(offset_type::none)
    , m(*m)
    , n(*n)
    , k(*k)
    , lda(lda ? *lda : 0)
    , ldb(ldb ? *ldb : 0)
    , ldc(ldc ? *ldc : 0)
    , a(a)
    , b(b)
    , c(c)
    , alpha(alpha ? *alpha : 1.0f)
    , beta(beta ? *beta : 1.0f)
    , ao(0)
    , bo(0)
    , co(nullptr)
    , packing(packing)
    , pack_dst(pack_dst)
    , measure_only(measure_only && pack_dst && (packing != pack_type::none)) {

    if (this->transa == packed) {
        dim_t cols;

        this->a_packed = std::make_shared<gemm_pack_storage_t>(a);
        if (this->a_packed->get_nocopy(this->transa, this->lda, cols)) {
            this->a = this->a_packed->template matrix<a_t>();
            this->a_packed = nullptr;
        }
    }
    if (this->transb == packed) {
        dim_t rows;

        this->b_packed = std::make_shared<gemm_pack_storage_t>(b);
        if (this->b_packed->get_nocopy(this->transb, this->ldb, rows)) {
            this->b = this->b_packed->template matrix<b_t>();
            this->b_packed = nullptr;
        }
    }

    constexpr bool is_int8 = utils::one_of(
            data_traits_t<a_t>::data_type, data_type::s8, data_type::u8);
    if (is_int8) this->ao = oa ? *oa : a_t(0);
    prepare_bo<b_t>(this->bo, ob);

    if (offsetC != nullptr) {
        char offsetc = *offsetC;
        if (offsetc == 'F' || offsetc == 'f') {
            this->offsetc = offset_type::fixed;
        } else if (offsetc == 'R' || offsetc == 'r') {
            this->offsetc = offset_type::row;
        } else { // offsetc == 'C' || offsetc == 'c'
            this->offsetc = offset_type::column;
        }
        this->co = oc;
    }

    bool is_sgemm = data_traits_t<a_t>::data_type == data_type::f32;
    bool is_gemv = this->m == 1 || this->n == 1;

    // Copy-based sgemm doesn't support force-nocopy for ISAs older
    // than Intel AVX.
    this->force_nocopy
            = is_sgemm && force_nocopy && mayiuse(avx) && __BUILD_GEMM_AVX2;

    if (!this->force_nocopy || is_gemv) { this->jit_init(); }
}

static std::mutex kern_mutex;

// copyA[trans][sum]
template <typename a_t, typename b_t, typename c_t>
typename gemm_info_t<a_t, b_t, c_t>::copy_a_fptr_t
        gemm_info_t<a_t, b_t, c_t>::copy_a_kern[2][2]
        = {{nullptr}};

// copyB[trans][sum]
template <typename a_t, typename b_t, typename c_t>
typename gemm_info_t<a_t, b_t, c_t>::copy_b_fptr_t
        gemm_info_t<a_t, b_t, c_t>::copy_b_kern[2][2]
        = {{nullptr}};

// kern[beta0][alpha1][col_off][row_off]
template <typename a_t, typename b_t, typename c_t>
typename gemm_info_t<a_t, b_t, c_t>::gemm_fptr_t
        gemm_info_t<a_t, b_t, c_t>::kern[2][2][2][2]
        = {{{{nullptr}}}};

// gemv_kern[trans]
template <typename a_t, typename b_t, typename c_t>
typename gemm_info_t<a_t, b_t, c_t>::gemv_fptr_t
        gemm_info_t<a_t, b_t, c_t>::gemv_kern[2]
        = {nullptr};

template <typename a_t, typename b_t, typename c_t>
typename gemm_info_t<a_t, b_t, c_t>::gemv_s8s8s32_fptr_t
        gemm_info_t<a_t, b_t, c_t>::gemv_s8s8s32_kern
        = nullptr;
template <typename a_t, typename b_t, typename c_t>
typename gemm_info_t<a_t, b_t, c_t>::gemv_s8u8s32_fptr_t
        gemm_info_t<a_t, b_t, c_t>::gemv_s8u8s32_kern
        = nullptr;
template <typename a_t, typename b_t, typename c_t>
typename gemm_info_t<a_t, b_t, c_t>::gemv_u8s8s32_fptr_t
        gemm_info_t<a_t, b_t, c_t>::gemv_u8s8s32_kern
        = nullptr;

template <typename a_t, typename b_t, typename c_t>
void gemm_info_t<a_t, b_t, c_t>::jit_init(void) {

    bool use_bf16_ymm = false;
    UNUSED(use_bf16_ymm);
    // TODO: Add dispatching for 1-fma SKUs with support to bf16
    // instructions for AMX kernel.
    {
        constexpr bool is_bf16
                = data_traits_t<a_t>::data_type == data_type::bf16;
        const bool max_isa_supports_bf16_ymm = mayiuse(avx512_core_bf16_ymm)
                && __BUILD_GEMM_AVX512
                && !(mayiuse(avx512_core_amx) && __BUILD_GEMM_AMX);

        use_bf16_ymm = is_bf16 && max_isa_supports_bf16_ymm;
    }

    switch (data_traits_t<a_t>::data_type) {
        case data_type::s8:
            if (false) {
                // dummy if
#if __BUILD_GEMM_AMX
            } else if (mayiuse(avx512_core_amx)) {
                this->um = 32;
                this->un = 32;
                this->uk = 64;
                this->bm = 9984;
                this->bn = 384;
                this->bk = 1536;

                this->bk_traditional = 0;
                this->blocking_small_k = 0;
                this->bn_small_k = 0;
#endif
#if __BUILD_GEMM_AVX512
            } else if (mayiuse(avx512_core)) {
                this->um = 48;
                this->un = 8;
                this->uk = 1;
                this->bm = 9984;
                this->bn = 384;
                this->bk = mayiuse(avx512_core_vnni) ? 1536 : 768;

                this->bk_traditional = 384;
                this->blocking_small_k = 48;
                this->bn_small_k = 24;
#endif
#if __BUILD_GEMM_AVX2
            } else if (mayiuse(avx2)) {
                this->um = mayiuse(avx2_vnni) ? 24 : 16;
                this->un = 4;
                this->uk = 1;
                this->bm = 9984;
                this->bn = mayiuse(avx2_vnni) ? 192 : 384;
                this->bk = mayiuse(avx2_vnni) ? 768 : 384;

                this->bk_traditional = 256;
                this->blocking_small_k = 48;
                this->bn_small_k = 24;
#endif
#if __BUILD_GEMM_AVX2
            } else if (mayiuse(avx)) {
                this->um = 16;
                this->un = 2;
                this->uk = 1;
                this->bm = 4096;
                this->bn = 256;
                this->bk = 256;

                this->bk_traditional = 256;
                this->blocking_small_k = 48;
                this->bn_small_k = 24;
#endif
#if __BUILD_GEMM_SSE41
            } else if (mayiuse(sse41)) {
                this->um = 16;
                this->un = 2;
                this->uk = 1;
                this->bm = 4096;
                this->bn = 256;
                this->bk = 256;

                this->bk_traditional = 256;
                this->blocking_small_k = 48;
                this->bn_small_k = 24;
#endif
            }
            break;

        case data_type::bf16:
            if (false) {
                // dummy if
#if __BUILD_GEMM_AMX
            } else if (mayiuse(avx512_core_amx)) {
                this->um = 32;
                this->un = 32;
                this->uk = 32;
                this->bm = 9984;
                this->bn = 384;
                this->bk = 768;

                this->bk_traditional = 0;
                this->blocking_small_k = 0;
                this->bn_small_k = 0;
#endif
#if __BUILD_GEMM_AVX512
            } else if (mayiuse(avx512_core)) {
                this->um = use_bf16_ymm ? 24 : 48;
                this->un = 8;
                this->uk = 1;
                this->bm = 9984;
                this->bn = 384;
                this->bk = use_bf16_ymm ? 384 : 768;

                this->bk_traditional = 384;
                this->blocking_small_k = 48;
                this->bn_small_k = 24;
#endif
            }
            break;

        case data_type::f32:
            if (false) {
                // dummy if
#if __BUILD_GEMM_AVX512
            } else if (mayiuse(avx512_core)) {
                this->um = 48;
                this->un = 8;
                this->uk = 1;
                this->bm = 9984;
                this->bn = 384;
                this->bk = 384;

                this->bk_traditional = 384;
                this->blocking_small_k = 48;
                this->bn_small_k = 24;
#endif
#if __BUILD_GEMM_AVX2
            } else if (mayiuse(avx2)) {
                this->um = 24;
                this->un = 4;
                this->uk = 1;
                this->bm = 10000;
                this->bn = 384;
                this->bk = 192;

                this->bk_traditional = 256;
                this->blocking_small_k = 48;
                this->bn_small_k = 24;
#endif
#if __BUILD_GEMM_AVX2
            } else if (mayiuse(avx)) {
                this->um = 16;
                this->un = 4;
                this->uk = 1;
                this->bm = 4096;
                this->bn = 96;
                this->bk = 256;

                this->bk_traditional = 256;
                this->blocking_small_k = 48;
                this->bn_small_k = 24;
#endif
#if __BUILD_GEMM_SSE41
            } else if (mayiuse(sse41)) {
                this->um = 8;
                this->un = 4;
                this->uk = 1;
                this->bm = 4096;
                this->bn = 96;
                this->bk = 256;

                this->bk_traditional = 256;
                this->blocking_small_k = 48;
                this->bn_small_k = 24;
#endif
            }
            break;
        default: assert(!"unsupported data type!");
    }

    // Note: um is fixed for a given set of data types and ISA.
    const int um = this->um;

    static std::once_flag initialized;
    static std::atomic<dnnl_status_t> st(dnnl_success);
    std::call_once(initialized, [&, um] {
        const bool b_is_s8 = data_traits_t<b_t>::data_type == data_type::s8;
        UNUSED(b_is_s8);
        constexpr bool is_int8 = utils::one_of(
                data_traits_t<a_t>::data_type, data_type::s8, data_type::u8);
        constexpr bool is_bf16
                = data_traits_t<a_t>::data_type == data_type::bf16;
        bool is_int8_amx
                = is_int8 && mayiuse(avx512_core_amx) && __BUILD_GEMM_AMX;
        bool is_bf16_amx
                = is_bf16 && mayiuse(avx512_core_amx) && __BUILD_GEMM_AMX;
        bool is_amx = is_int8_amx || is_bf16_amx;

        static maybe_unique_ptr<jit_generator_t> copy_a[2][2] = {{nullptr}};
        static maybe_unique_ptr<jit_generator_t> copy_b[2][2] = {{nullptr}};

        switch (data_traits_t<a_t>::data_type) {
            case data_type::s8:
                if (false) {
                    // dummy if
#if __BUILD_GEMM_AMX
                } else if (mayiuse(amx_int8)) {
                    for (int isTrans : {no_trans, do_trans}) {
                        copy_a[isTrans][no_sum].reset(
                                new jit_avx512_core_amx_copy_kern_t(
                                        true, !isTrans, sizeof(a_t)));

                        copy_b[isTrans][no_sum].reset(
                                new jit_avx512_core_amx_copy_kern_t(
                                        false, isTrans, sizeof(b_t)));
                    }
#endif
#if __BUILD_GEMM_AVX512
                } else if (mayiuse(avx512_core)) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_avx512_core_u8_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_avx512_core_u8_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_avx512_core_u8_copy_bn_kern_t(b_is_s8));
                    copy_b[do_trans][no_sum].reset(
                            new jit_avx512_core_u8_copy_bt_kern_t(b_is_s8));

                    copy_a[no_trans][do_sum].reset(
                            new jit_avx512_core_u8_copy_sum_an_kern_t());
                    copy_a[do_trans][do_sum].reset(
                            new jit_avx512_core_u8_copy_sum_at_kern_t());

                    copy_b[no_trans][do_sum].reset(
                            new jit_avx512_core_u8_copy_sum_bn_kern_t(b_is_s8));
                    copy_b[do_trans][do_sum].reset(
                            new jit_avx512_core_u8_copy_sum_bt_kern_t(b_is_s8));
#endif
#if __BUILD_GEMM_AVX2
                } else if (mayiuse(avx2_vnni)) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_avx2_vnni_u8_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_avx2_vnni_u8_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_avx2_vnni_u8_copy_bn_kern_t());
                    copy_b[do_trans][no_sum].reset(
                            new jit_avx2_vnni_u8_copy_bt_kern_t());

                    copy_a[no_trans][do_sum].reset(
                            new jit_avx2_vnni_u8_copy_sum_an_kern_t());
                    copy_a[do_trans][do_sum].reset(
                            new jit_avx2_vnni_u8_copy_sum_at_kern_t());

                    copy_b[no_trans][do_sum].reset(
                            new jit_avx2_vnni_u8_copy_sum_bn_kern_t());
                    copy_b[do_trans][do_sum].reset(
                            new jit_avx2_vnni_u8_copy_sum_bt_kern_t());
#endif
#if __BUILD_GEMM_AVX2
                } else if (mayiuse(avx2)) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_avx2_u8_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_avx2_u8_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_avx2_u8_copy_bn_kern_t());
                    copy_b[do_trans][no_sum].reset(
                            new jit_avx2_u8_copy_bt_kern_t());

                    copy_a[no_trans][do_sum].reset(
                            new jit_avx2_u8_copy_sum_an_kern_t());
                    copy_a[do_trans][do_sum].reset(
                            new jit_avx2_u8_copy_sum_at_kern_t());

                    copy_b[no_trans][do_sum].reset(
                            new jit_avx2_u8_copy_sum_bn_kern_t());
                    copy_b[do_trans][do_sum].reset(
                            new jit_avx2_u8_copy_sum_bt_kern_t());
#endif
#if __BUILD_GEMM_AVX2
                } else if (mayiuse(avx)) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_avx_u8_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_avx_u8_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_avx_u8_copy_bn_kern_t());
                    copy_b[do_trans][no_sum].reset(
                            new jit_avx_u8_copy_bt_kern_t());

                    copy_a[no_trans][do_sum].reset(
                            new jit_avx_u8_copy_sum_an_kern_t());
                    copy_a[do_trans][do_sum].reset(
                            new jit_avx_u8_copy_sum_at_kern_t());

                    copy_b[no_trans][do_sum].reset(
                            new jit_avx_u8_copy_sum_bn_kern_t());
                    copy_b[do_trans][do_sum].reset(
                            new jit_avx_u8_copy_sum_bt_kern_t());
#endif
#if __BUILD_GEMM_SSE41
                } else if (mayiuse(sse41)) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_sse41_u8_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_sse41_u8_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_sse41_u8_copy_bn_kern_t());
                    copy_b[do_trans][no_sum].reset(
                            new jit_sse41_u8_copy_bt_kern_t());

                    copy_a[no_trans][do_sum].reset(
                            new jit_sse41_u8_copy_sum_an_kern_t());
                    copy_a[do_trans][do_sum].reset(
                            new jit_sse41_u8_copy_sum_at_kern_t());

                    copy_b[no_trans][do_sum].reset(
                            new jit_sse41_u8_copy_sum_bn_kern_t());
                    copy_b[do_trans][do_sum].reset(
                            new jit_sse41_u8_copy_sum_bt_kern_t());
#endif
                }
                break;

            case data_type::bf16:
                if (false) {
                    // dummy if
#if __BUILD_GEMM_AMX
                } else if (mayiuse(amx_bf16)) {
                    for (int isTrans : {no_trans, do_trans}) {
                        copy_a[isTrans][no_sum].reset(
                                new jit_avx512_core_amx_copy_kern_t(
                                        true, !isTrans, sizeof(a_t)));

                        copy_b[isTrans][no_sum].reset(
                                new jit_avx512_core_amx_copy_kern_t(
                                        false, isTrans, sizeof(b_t)));
                    }
#endif
#if __BUILD_GEMM_AVX512
                } else if (mayiuse(avx512_core) && !use_bf16_ymm) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_avx512_core_s16_48x8_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_avx512_core_s16_48x8_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_avx512_core_s16_48x8_copy_bn_kern_t());
                    copy_b[do_trans][no_sum].reset(
                            new jit_avx512_core_s16_48x8_copy_bt_kern_t());
#endif
#if __BUILD_GEMM_AVX512
                } else if (mayiuse(avx512_core) && use_bf16_ymm) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_avx512_core_s16_24x8_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_avx512_core_s16_24x8_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_avx512_core_s16_24x8_copy_bn_kern_t());
                    copy_b[do_trans][no_sum].reset(
                            new jit_avx512_core_s16_24x8_copy_bt_kern_t());
#endif
                }
                break;

            case data_type::f32:
                if (false) {
                    // dummy if
#if __BUILD_GEMM_AVX512
                } else if (mayiuse(avx512_core)) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_avx512_core_f32_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_avx512_core_f32_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_avx512_core_f32_copy_bn_kern_t());
                    copy_b[do_trans][no_sum].reset(
                            new jit_avx512_core_f32_copy_bt_kern_t());
#endif
#if __BUILD_GEMM_AVX2
                } else if (mayiuse(avx2)) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_avx2_f32_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_avx2_f32_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_avx2_f32_copy_bn_kern_t());
                    copy_b[do_trans][no_sum].reset(
                            new jit_avx2_f32_copy_bt_kern_t());
#endif
#if __BUILD_GEMM_AVX2
                } else if (mayiuse(avx)) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_avx_f32_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_avx_f32_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_avx_f32_copy_bn_kern_t());
                    copy_b[do_trans][no_sum].reset(
                            new jit_avx_f32_copy_bt_kern_t());
#endif
#if __BUILD_GEMM_SSE41
                } else if (mayiuse(sse41)) {
                    copy_a[no_trans][no_sum].reset(
                            new jit_sse41_f32_copy_an_kern_t());
                    copy_a[do_trans][no_sum].reset(
                            new jit_sse41_f32_copy_at_kern_t());

                    copy_b[no_trans][no_sum].reset(
                            new jit_sse41_f32_copy_bn_kern_t());
                    copy_b[do_trans][no_sum].reset(
                            new jit_sse41_f32_copy_bt_kern_t());
#endif
                }
                break;

            default: break;
        }

        constexpr bool is_a_s8 = data_traits_t<a_t>::data_type == data_type::s8;
        constexpr bool is_b_s8 = data_traits_t<b_t>::data_type == data_type::s8;
        constexpr bool is_c_s32
                = data_traits_t<c_t>::data_type == data_type::s32;
        UNUSED(is_a_s8);
        UNUSED(is_b_s8);
        UNUSED(is_c_s32);

        static maybe_unique_ptr<jit_generator_t> kernel[2][2][2][2]
                = {{{{nullptr}}}};
        switch (data_traits_t<a_t>::data_type) {
            case data_type::s8:
                if (false) {
                    // dummy if
#if __BUILD_GEMM_AMX
                } else if (mayiuse(avx512_core_amx)) {
                    for (int isBeta0 : {no_beta0, do_beta0}) {
                        kernel[isBeta0][do_alpha1][no_sum][no_sum].reset(
                                new jit_avx512_core_amx_gemm_kern_t(
                                        is_a_s8, is_b_s8, is_c_s32, isBeta0));
                    }
#endif
#if __BUILD_GEMM_AVX512
                } else if (mayiuse(avx512_core)) {
                    for (int isBeta0 : {no_beta0, do_beta0})
                        for (int doColSum : {no_sum, do_sum})
                            for (int doRowSum : {no_sum, do_sum}) {
                                kernel[isBeta0][do_alpha1][doColSum][doRowSum].reset(
                                        new jit_avx512_core_gemm_s8u8s32_kern_t(
                                                isBeta0, doColSum, doRowSum));
                            }
#endif
#if __BUILD_GEMM_AVX2
                } else if (mayiuse(avx2)) {
                    for (int isBeta0 : {no_beta0, do_beta0})
                        for (int doColSum : {no_sum, do_sum})
                            for (int doRowSum : {no_sum, do_sum}) {
                                kernel[isBeta0][do_alpha1][doColSum][doRowSum]
                                        .reset(new jit_avx2_gemm_s8u8s32_kern_t(
                                                isBeta0, doColSum, doRowSum,
                                                um));
                            }
#endif
#if __BUILD_GEMM_AVX2
                } else if (mayiuse(avx)) {
                    kernel[no_beta0][do_alpha1][no_sum][no_sum].reset(
                            new jit_avx_kernel_gemm_s8u8s32_kern_t());
                    kernel[no_beta0][do_alpha1][do_sum][no_sum].reset(
                            new jit_avx_kernel_c_gemm_s8u8s32_kern_t());
                    kernel[no_beta0][do_alpha1][no_sum][do_sum].reset(
                            new jit_avx_kernel_r_gemm_s8u8s32_kern_t());
                    kernel[no_beta0][do_alpha1][do_sum][do_sum].reset(
                            new jit_avx_kernel_b_gemm_s8u8s32_kern_t());

                    kernel[do_beta0][do_alpha1][no_sum][no_sum].reset(
                            new jit_avx_kernel_b0_gemm_s8u8s32_kern_t());
                    kernel[do_beta0][do_alpha1][do_sum][no_sum].reset(
                            new jit_avx_kernel_b0_c_gemm_s8u8s32_kern_t());
                    kernel[do_beta0][do_alpha1][no_sum][do_sum].reset(
                            new jit_avx_kernel_b0_r_gemm_s8u8s32_kern_t());
                    kernel[do_beta0][do_alpha1][do_sum][do_sum].reset(
                            new jit_avx_kernel_b0_b_gemm_s8u8s32_kern_t());
#endif
#if __BUILD_GEMM_SSE41
                } else if (mayiuse(sse41)) {
                    kernel[no_beta0][do_alpha1][no_sum][no_sum].reset(
                            new jit_sse41_kernel_gemm_s8u8s32_kern_t());
                    kernel[no_beta0][do_alpha1][do_sum][no_sum].reset(
                            new jit_sse41_kernel_c_gemm_s8u8s32_kern_t());
                    kernel[no_beta0][do_alpha1][no_sum][do_sum].reset(
                            new jit_sse41_kernel_r_gemm_s8u8s32_kern_t());
                    kernel[no_beta0][do_alpha1][do_sum][do_sum].reset(
                            new jit_sse41_kernel_b_gemm_s8u8s32_kern_t());

                    kernel[do_beta0][do_alpha1][no_sum][no_sum].reset(
                            new jit_sse41_kernel_b0_gemm_s8u8s32_kern_t());
                    kernel[do_beta0][do_alpha1][do_sum][no_sum].reset(
                            new jit_sse41_kernel_b0_c_gemm_s8u8s32_kern_t());
                    kernel[do_beta0][do_alpha1][no_sum][do_sum].reset(
                            new jit_sse41_kernel_b0_r_gemm_s8u8s32_kern_t());
                    kernel[do_beta0][do_alpha1][do_sum][do_sum].reset(
                            new jit_sse41_kernel_b0_b_gemm_s8u8s32_kern_t());
#endif
                }
                break;

            case data_type::bf16:
                if (false) {
                    // dummy if
#if __BUILD_GEMM_AMX
                } else if (mayiuse(avx512_core_amx)) {
                    for (int isBeta0 : {no_beta0, do_beta0}) {
                        kernel[isBeta0][do_alpha1][no_sum][no_sum].reset(
                                new jit_avx512_core_amx_gemm_kern_t(
                                        is_a_s8, is_b_s8, is_c_s32, isBeta0));
                    }
#endif
#if __BUILD_GEMM_AVX512
                } else if (mayiuse(avx512_core)) {
                    for (int isBeta0 : {no_beta0, do_beta0})
                        for (int isAlpha1 : {no_alpha1, do_alpha1}) {
                            kernel[isBeta0][isAlpha1][no_sum][no_sum].reset(
                                    new jit_avx512_core_gemm_bf16bf16f32_kern_t(
                                            isBeta0, isAlpha1, !use_bf16_ymm));
                        }
#endif
                }
                break;

            case data_type::f32:
                if (false) {
                    // dummy if
#if __BUILD_GEMM_AVX2
                } else if (mayiuse(avx2)) {
                    for (int isBeta0 : {no_beta0, do_beta0}) {
                        kernel[isBeta0][do_alpha1][no_sum][no_sum].reset(
                                new jit_avx2_kernel_sgemm_kern_t(isBeta0));
                    }
#endif
#if __BUILD_GEMM_AVX2
                } else if (mayiuse(avx)) {
                    kernel[no_beta0][do_alpha1][no_sum][no_sum].reset(
                            new jit_avx_kernel_sgemm_kern_t());
                    kernel[do_beta0][do_alpha1][no_sum][no_sum].reset(
                            new jit_avx_kernel_b0_sgemm_kern_t());
#endif
#if __BUILD_GEMM_SSE41
                } else if (mayiuse(sse41)) {
                    kernel[no_beta0][do_alpha1][no_sum][no_sum].reset(
                            new jit_sse41_kernel_sgemm_kern_t());
                    kernel[do_beta0][do_alpha1][no_sum][no_sum].reset(
                            new jit_sse41_kernel_b0_sgemm_kern_t());
#endif
                }
                break;

            default: break;
        }

        static maybe_unique_ptr<jit_generator_t> gemv_kernel[2] = {nullptr};
        static maybe_unique_ptr<jit_generator_t> gemv_s8s8s32_kernel = nullptr;
        static maybe_unique_ptr<jit_generator_t> gemv_s8u8s32_kernel = nullptr;
        static maybe_unique_ptr<jit_generator_t> gemv_u8s8s32_kernel = nullptr;
        switch (data_traits_t<a_t>::data_type) {
            case data_type::s8:
                if (false) {
                    // dummy if
#if __BUILD_GEMM_AVX512
                } else if (mayiuse(avx512_core)) {
                    gemv_s8s8s32_kernel.reset(
                            new jit_avx512_core_gemv_s8x8s32_kern_t(
                                    ver_t::s8s8));
                    gemv_s8u8s32_kernel.reset(
                            new jit_avx512_core_gemv_s8x8s32_kern_t(
                                    ver_t::s8u8));
                    gemv_u8s8s32_kernel.reset(
                            new jit_avx512_core_gemv_s8x8s32_kern_t(
                                    ver_t::u8s8));
#endif
                }
                break;

            case data_type::bf16:
                if (false) {
                    // dummy if
#if __BUILD_GEMM_AVX512
                } else if (mayiuse(avx512_core)) {
                    for (int isTrans : {no_trans, do_trans})
                        gemv_kernel[isTrans].reset(
                                new jit_avx512_core_gemv_bf16bf16f32_kern_t(
                                        isTrans));
#endif
                }
                break;

            case data_type::f32:
                if (false) {
                    // dummy if
#if __BUILD_GEMM_AVX2
                } else if (mayiuse(avx)) {
                    gemv_kernel[no_trans].reset(
                            new jit_sse41_gemv_n_f32_kern_t());
                    gemv_kernel[do_trans].reset(
                            new jit_avx_gemv_t_f32_kern_t());
#endif
#if __BUILD_GEMM_SSE41
                } else if (mayiuse(sse41)) {
                    gemv_kernel[no_trans].reset(
                            new jit_sse41_gemv_n_f32_kern_t());
                    gemv_kernel[do_trans].reset(
                            new jit_sse41_gemv_t_f32_kern_t());
#endif
                }
                break;
            default: assert(!"unsupported data type!");
        }

        // Set copy kernels function pointer table
        for (int isTrans : {no_trans, do_trans})
            for (int isSum : {no_sum, do_sum}) {
                auto *p_copy_a = copy_a[isTrans][isSum].get();
                if (p_copy_a != nullptr) {
                    st = p_copy_a->create_kernel();
                    if (st != dnnl_success) return;
                    copy_a_kern[isTrans][isSum]
                            = (copy_a_fptr_t)p_copy_a->jit_ker();
                }
                auto *p_copy_b = copy_b[isTrans][isSum].get();
                if (p_copy_b != nullptr) {
                    st = p_copy_b->create_kernel();
                    if (st != dnnl_success) return;
                    copy_b_kern[isTrans][isSum]
                            = (copy_b_fptr_t)p_copy_b->jit_ker();
                }
            }

        // AMX copy kernels don't support row/column sum. Use wrappers for now.
        if (is_int8_amx) {
            copy_a_kern[no_trans][do_sum] = &copy_a_sum_ref<no_trans>;
            copy_a_kern[do_trans][do_sum] = &copy_a_sum_ref<do_trans>;
            copy_b_kern[no_trans][do_sum] = &copy_b_sum_ref<no_trans>;
            copy_b_kern[do_trans][do_sum] = &copy_b_sum_ref<do_trans>;
        }

        // Set compute kernel function pointer table
        for (int isBeta0 : {no_beta0, do_beta0})
            for (int isAlpha1 : {no_alpha1, do_alpha1})
                for (int doColSum : {no_sum, do_sum})
                    for (int doRowSum : {no_sum, do_sum}) {
                        auto *p_kernel
                                = kernel[isBeta0][isAlpha1][doColSum][doRowSum]
                                          .get();
                        if (p_kernel != nullptr) {
                            st = p_kernel->create_kernel();
                            if (st != dnnl_success) return;
                            kern[isBeta0][isAlpha1][doColSum][doRowSum]
                                    = (gemm_fptr_t)p_kernel->jit_ker();
                        }
                    }

        // Override compute kernel table with AMX kernels
        if (is_amx) {
            // AMX compute kernels don't support alpha scaling, row-offset or
            // col-offset.
            for (int isBeta0 : {no_beta0, do_beta0})
                for (int isAlpha1 : {no_alpha1, do_alpha1})
                    for (int doColSum : {no_sum, do_sum})
                        for (int doRowSum : {no_sum, do_sum}) {
                            kern[isBeta0][isAlpha1][doColSum][doRowSum]
                                    = kern[isBeta0][do_alpha1][no_sum][no_sum];
                        }
        }

        // Set gemv floating point kernels
        if (utils::one_of(data_traits_t<a_t>::data_type, data_type::f32,
                    data_type::bf16)) {
            for (int isTrans : {no_trans, do_trans}) {
                auto *p_gemv_kernel = gemv_kernel[isTrans].get();
                if (p_gemv_kernel != nullptr) {
                    st = p_gemv_kernel->create_kernel();
                    if (st != dnnl_success) return;
                    gemv_kern[isTrans] = (gemv_fptr_t)p_gemv_kernel->jit_ker();
                }
            }
        }

        // Set gemv integer gemm kernels
        if (data_traits_t<a_t>::data_type == data_type::s8) {
            if (gemv_s8s8s32_kernel != nullptr) {
                auto *kern = gemv_s8s8s32_kernel.get();
                st = kern->create_kernel();
                if (st != dnnl_success) return;
                gemv_s8s8s32_kern = (gemv_s8s8s32_fptr_t)kern->jit_ker();
            }

            if (gemv_s8u8s32_kernel != nullptr) {
                auto *kern = gemv_s8u8s32_kernel.get();
                st = kern->create_kernel();
                if (st != dnnl_success) return;
                gemv_s8u8s32_kern = (gemv_s8u8s32_fptr_t)kern->jit_ker();
            }

            if (gemv_u8s8s32_kernel != nullptr) {
                auto *kern = gemv_u8s8s32_kernel.get();
                st = kern->create_kernel();
                if (st != dnnl_success) return;
                gemv_u8s8s32_kern = (gemv_u8s8s32_fptr_t)kern->jit_ker();
            }
        }
    });

    if (st != dnnl_success) return;

    int doSumA = this->bo != 0 ? do_sum : no_sum;
    int doSumB = this->ao != 0 ? do_sum : no_sum;

    int copy_trans_a = (this->transa == do_trans) ? do_trans : no_trans;
    int copy_trans_b = (this->transb == do_trans) ? do_trans : no_trans;

    constexpr bool is_bf16 = data_traits_t<a_t>::data_type == data_type::bf16;
    bool doAlpha1 = this->alpha != 1.0f && is_bf16 ? no_alpha1 : do_alpha1;

    {
        // NOTE: This lock may not be needed at all as writes to copy_a_kern
        // (and others) are protected within std::call_once(). The lock is added
        // only to fix warnings reported by clang TSAN about a data race in
        // this code block.
        std::lock_guard<std::mutex> g(kern_mutex);
        this->copyA = copy_a_kern[copy_trans_a][doSumA];
        this->copyB = copy_b_kern[copy_trans_b][doSumB];
        for (int isBeta0 : {no_beta0, do_beta0})
            for (int doColSum : {no_sum, do_sum})
                for (int doRowSum : {no_sum, do_sum})
                    this->kernel[isBeta0][doColSum][doRowSum]
                            = kern[isBeta0][doAlpha1][doColSum][doRowSum];
        for (int isTrans : {no_trans, do_trans})
            this->gemv_kernel[isTrans] = gemv_kern[isTrans];
    }

    this->gemv_s8s8s32_kernel = nullptr;
    this->gemv_s8u8s32_kernel = nullptr;
    this->gemv_u8s8s32_kernel = nullptr;
    if (data_traits_t<a_t>::data_type == data_type::s8) {
        this->gemv_s8s8s32_kernel = gemv_s8s8s32_kern;
        this->gemv_s8u8s32_kernel = gemv_s8u8s32_kern;
        this->gemv_u8s8s32_kernel = gemv_u8s8s32_kern;
    }
}

// Check if copy algorithm kernels were generated on supported ISAs.
// Copy algorithm supported for:
//      s8  : Intel AVX512, Intel DL Boost
//      bf16 : Intel AVX512, Intel AVX512 BF16
//      f32 : Intel SSE4.1, Intel AVX, Intel AVX2, Intel AVX512
template <typename a_t, typename b_t, typename c_t>
bool gemm_info_t<a_t, b_t, c_t>::hasKernels(void) {

    switch (data_traits_t<a_t>::data_type) {
        case data_type::s8:
            if (mayiuse(sse41)) {
                for (int isBeta0 : {no_beta0, do_beta0})
                    for (int doColSum : {no_sum, do_sum})
                        for (int doRowSum : {no_sum, do_sum})
                            if (!this->kernel[isBeta0][doColSum][doRowSum])
                                return false;

                if (!this->copyA || !this->copyB) return false;

#if __BUILD_GEMM_AVX512
                if (mayiuse(avx512_core))
                    if (!this->gemv_s8u8s32_kernel || !this->gemv_u8s8s32_kernel
                            || !this->gemv_s8s8s32_kernel)
                        return false;
#endif
            }
            break;

        case data_type::bf16:
#if __BUILD_GEMM_AVX512
            if (mayiuse(avx512_core)) {
                for (int isBeta0 : {no_beta0, do_beta0})
                    if (!this->kernel[isBeta0][no_sum][no_sum]) return false;

                if (!this->copyA || !this->copyB) return false;

                for (int isTrans : {no_trans, do_trans})
                    if (!this->gemv_kernel[isTrans]) return false;
            }
#endif
            break;

        case data_type::f32:
            if (mayiuse(sse41) && !this->force_nocopy) {
                for (int isBeta0 : {no_beta0, do_beta0})
                    if (!this->kernel[isBeta0][no_sum][no_sum]) return false;

                if (!this->copyA || !this->copyB) return false;

                for (int isTrans : {no_trans, do_trans})
                    if (!this->gemv_kernel[isTrans]) return false;
            }
            break;
        default: assert(!"unsupported data type!");
    }

    // All kernels necessary have been found or ISA is not supported.
    return true;
}

// Override default blocking sizes with sizes specified in the gemm_threading_t
//  structure.
template <typename a_t, typename b_t, typename c_t>
void gemm_info_t<a_t, b_t, c_t>::update_blocking(
        const gemm_threading_t &thread_info) {

    if (thread_info.block_m > 0) this->bm = thread_info.block_m;
    if (thread_info.block_n > 0) this->bn = thread_info.block_n;
    if (thread_info.block_k > 0) this->bk = thread_info.block_k;
}

// Instantiate the gemm_info_t templates needed.
template // For gemm_s8u8s32
        struct gemm_info_t<int8_t, uint8_t, int32_t>;

template // For gemm_s8s8s32
        struct gemm_info_t<int8_t, int8_t, int32_t>;

template // For gemm_bf16bf16f32
        struct gemm_info_t<bfloat16_t, bfloat16_t, float>;

template // For sgemm.
        struct gemm_info_t<float, float, float>;

} // namespace x64
} // namespace cpu
} // namespace impl
} // namespace dnnl
