// MIT License
//
// Copyright (c) 2024-2025 Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#include "lib/att-tool/waitcnt/analysis.hpp"

#include <map>
#include <mutex>

#define CLASS_BITS (0xF)
#define LGK_BIT    (1 << 4)
#define VMEM_BIT   (1 << 5)

namespace rocprofiler
{
namespace att_wrapper
{
enum MemoryInstType
{
    TYPE_UNCLASSIFIED = 0,
    TYPE_NOT_MEM,
    TYPE_SCALAR,
    TYPE_LDS_MSG,
    TYPE_GLOBAL,
    TYPE_FLAT,
    TYPE_WAITCNT
};

int
classify(const std::string& inst)
{
    if(inst.find("s_waitcnt") == 0)
    {
        int type = TYPE_WAITCNT;
        if(inst.find("lgk") != std::string::npos) type |= LGK_BIT;
        if(inst.find("vmcnt") != std::string::npos) type |= VMEM_BIT;

        return type;
    }

    if(inst.find("v_") == 0) return MemoryInstType::TYPE_NOT_MEM;

    if(inst.find("s_") == 0)
    {
        if(inst.find("s_load") == 0 || inst.find("s_store") == 0)
            return MemoryInstType::TYPE_SCALAR;
        else if(inst.find("s_sendmsg") == 0)
            return MemoryInstType::TYPE_LDS_MSG;
        else
            return MemoryInstType::TYPE_NOT_MEM;
    }

    if(inst.find("global_") == 0 || inst.find("buffer_") <= 1 || inst.find("scratch_") == 0)
        return MemoryInstType::TYPE_GLOBAL;
    else if(inst.find("flat_") == 0)
        return MemoryInstType::TYPE_FLAT;
    else if(inst.find("ds_") == 0)
        return MemoryInstType::TYPE_LDS_MSG;
    else
        return MemoryInstType::TYPE_NOT_MEM;
}

std::vector<LineWaitcnt>
WaitcntList::gfx9_construct(const wave_t& wave, isa_map_t& isa_map)
{
    std::vector<LineWaitcnt> mem_unroll;

    MemoryCounter    lgkm("lgkmcnt");
    MemoryCounter    vmem("vmcnt");
    std::vector<int> vflat_list;

    for(size_t i = 0; i < wave.instructions_size; i++)
    {
        auto& event = wave.instructions_array[i];
        if(event.pc.code_object_id == 0 && event.pc.address == 0) continue;

        auto it = isa_map.find(event.pc);
        if(it == isa_map.end() || !it->second->code_line || it->second->code_line->inst.empty())
        {
            static thread_local std::once_flag failed_flag{};
            std::call_once(failed_flag, []() { ROCP_WARNING << "Analysis failed!"; });
            break;
        }

        int&               type     = it->second->type;
        const std::string& inst_str = it->second->code_line->inst;

        if(type == TYPE_UNCLASSIFIED) type = classify(inst_str);

        int line_number = it->second->line_number;
        int typeclass   = type & CLASS_BITS;

        if(typeclass == MemoryInstType::TYPE_NOT_MEM) continue;

        if(typeclass == MemoryInstType::TYPE_LDS_MSG)
        {
            lgkm.list.push_back(line_number);
        }
        else if(typeclass == MemoryInstType::TYPE_SCALAR)
        {
            lgkm.order = MemoryCounter::Ordering::MEMORY_PARALLEL;
            lgkm.list.push_back(line_number);
        }
        else if(typeclass == MemoryInstType::TYPE_GLOBAL)
        {
            vmem.list.push_back(line_number);
        }
        else if(typeclass == MemoryInstType::TYPE_FLAT)
        {
            lgkm.order = MemoryCounter::Ordering::MEMORY_PARALLEL;
            vmem.order = MemoryCounter::Ordering::MEMORY_PARALLEL;
            vflat_list.push_back(line_number);
        }
        else if(typeclass == MemoryInstType::TYPE_WAITCNT)
        {
            if((type & LGK_BIT) != 0)
            {
                if(auto joined = lgkm.handle_mem_op(inst_str, vflat_list))
                    mem_unroll.emplace_back(LineWaitcnt{line_number, std::move(*joined)});
            }

            if((type & VMEM_BIT) != 0)
            {
                if(auto joined = vmem.handle_mem_op(inst_str, vflat_list))
                    mem_unroll.emplace_back(LineWaitcnt{line_number, std::move(*joined)});
            }
        }
    }

    return mem_unroll;
}

}  // namespace att_wrapper
}  // namespace rocprofiler