/*******************************************************************************
* Copyright 2018 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.
*******************************************************************************/

#ifndef JIT_AVX512_CORE_X8S8S32X_1X1_CONV_KERNEL_HPP
#define JIT_AVX512_CORE_X8S8S32X_1X1_CONV_KERNEL_HPP

#include "c_types_map.hpp"
#include "memory_tracking.hpp"

#include "jit_generator.hpp"
#include "jit_primitive_conf.hpp"
#include "jit_uni_eltwise.hpp"
#include "jit_uni_depthwise.hpp"

namespace mkldnn {
namespace impl {
namespace cpu {

struct jit_avx512_core_x8s8s32x_1x1_conv_kernel: public jit_generator {
    DECLARE_CPU_JIT_AUX_FUNCTIONS(jit_avx512_core_x8s8s32x_1x1_conv_fwd_ker_t)
    jit_avx512_core_x8s8s32x_1x1_conv_kernel(jit_1x1_conv_conf_t ajcp,
            const primitive_attr_t &attr) : jcp(ajcp), attr_(attr)
    {
        this->generate();
        jit_ker = (void (*)(jit_1x1_conv_call_s *)) this->getCode();
    }

    ~jit_avx512_core_x8s8s32x_1x1_conv_kernel() {
        for (auto inj : eltwise_injectors)
            delete inj;
        eltwise_injectors.clear();

        for (auto inj : depthwise_injectors)
            delete inj;
        depthwise_injectors.clear();
    }

    static bool post_ops_ok(jit_1x1_conv_conf_t &jcp,
                                const primitive_attr_t &attr);

    static status_t init_conf(jit_1x1_conv_conf_t &jcp,
            const convolution_desc_t &cd,
            const memory_desc_wrapper &src_d,
            const memory_desc_wrapper &weights_d,
            const memory_desc_wrapper &dst_d,
            const memory_desc_wrapper &bias_d,
            const primitive_attr_t &attr,
            int nthreads, bool reduce_src);

    static void init_scratchpad(memory_tracking::registrar_t &scratchpad,
            const jit_1x1_conv_conf_t &jcp, const primitive_attr_t &attr);

    jit_1x1_conv_conf_t jcp;
    const primitive_attr_t &attr_;
    void (*jit_ker)(jit_1x1_conv_call_s *);

  private:
    nstl::vector<jit_uni_eltwise_injector_f32<avx512_common>*> eltwise_injectors;
    nstl::vector<jit_uni_depthwise_injector_f32<avx512_common>*> depthwise_injectors;

    using reg64_t = const Xbyak::Reg64;
    using zmm_t = const Xbyak::Zmm;
    using mask_t = const Xbyak::Opmask;

    reg64_t reg_bcast_data = r8;
    reg64_t reg_ptr_scales = r8;
    reg64_t reg_output_data = r9;
    reg64_t reg_load_data = r10;
    reg64_t reg_ptr_sum_scale = r10;
    reg64_t reg_reduce_loop_work = r11;
    reg64_t reg_bias_data = r12;
    reg64_t reg_comp_data = r12;
    reg64_t reg_scratch = r13;
    reg64_t aux_reg_bcast_data = r14;
    reg64_t aux_reg_load_data = r15;
    reg64_t imm_addr64 = r15;
    reg64_t reg_reduce_pos_flag = rax;
    reg64_t aux1_reg_bcast_data = rbx;
    reg64_t reg_bcast_loop_work = rbx;
    reg64_t bcast_loop_iter = rdx; // Note: Fix me
    reg64_t reg_load_loop_work = rsi;
    reg64_t aux_reg_output_data = abi_not_param1;
    reg64_t reduce_loop_iter = abi_param1;

    const Xbyak::Reg64 reg_d_weights = aux_reg_bcast_data;
    const Xbyak::Reg64 reg_d_bias = reduce_loop_iter;
    const Xbyak::Reg64 reg_oc_off = aux_reg_load_data;

    reg64_t reg_last_load = r8;
    mask_t ktail_mask = k6;

    mask_t vmask = k7;

    Xbyak::Zmm zmm_tmp = Xbyak::Zmm(28);
    Xbyak::Zmm zmm_one = Xbyak::Zmm(29);
    Xbyak::Zmm zmm_zero = Xbyak::Zmm(30);
    Xbyak::Zmm zmm_bcast = Xbyak::Zmm(31);
    Xbyak::Zmm zmm_shift = Xbyak::Zmm(30);

    Xbyak::Zmm zmm_bias_alpha = Xbyak::Zmm(31);
    Xbyak::Xmm xmm_bias_alpha = Xbyak::Xmm(31);

    int bcast_loop_work_off = 0;
    int reg_bias_data_off = 8;
    int reg_bcast_data_off = 16;
    int reg_load_data_off = 24;
    int reg_ptr_sum_scale_off = 32;
    int reg_comp_data_off = 40;
    int stack_space_needed = 48;

    void bcast_loop(int load_loop_blk);
    void reduce_loop(int load_loop_blk, int ur, int substep, bool wraparound);

    void generate();
    void cvt2ps(data_type_t type_in, zmm_t zmm_in, const Xbyak::Operand &op,
        bool mask_flag);
};

}
}
}

#endif
