/*
 * Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
 *
 * SPDX-License-Identifier: MIT
 */

/*
This testfile verifies Built fmax  API scenarios
1. Builtin fmax on Coherent Memory with memory type as global
2. Builtin fmax on Non-Coherent Memory with memory type as global
3. Builtin fmax with memory type as flat
4. Builtin fmax on Coherent Memory with RTC and memory type as global
5. Builtin fmax on Non-Coherent Memory with RTC and memory type as global
6. Builtin fmax with RTC and memory type as flat
*/


#include <hip_test_checkers.hh>
#include <string>
#include <hip_test_common.hh>
#include <hip/hiprtc.h>

#define INITIAL_VAL 5

__global__ void unsafeAtomicMax_FlatMem(double* addr, double* result) {
  __shared__ double int_val;
  int_val = 5;
  double comp = 10;
  *result = unsafeAtomicMax(&int_val, comp);
  *addr = int_val;
}
__global__ void unsafeAtomicMax_GlobalMem(double* addr, double* result) {
  double comp = 10;
  *result = unsafeAtomicMax(addr, comp);
}
static constexpr auto fmaxFlatMem{
    R"(
extern "C"
__global__ void unsafeAtomicMax_FlatMem(double* addr, double* result) {
  __shared__ double int_val;
  int_val = 5;
  double comp = 10;
  *result = unsafeAtomicMax(&int_val, comp);
  *addr = int_val;
}
)"};

static constexpr auto fmaxGlobalMem{
    R"(
extern "C"
__global__ void unsafeAtomicMax_GlobalMem(double* addr, double* result) {
  double comp = 10;
  *result = unsafeAtomicMax(addr, comp);
}
)"};

/*
This testcase verifies the builtinAtomic fmax API on Coherent memory
with memory type as global
Input: A_h with INITIAL_VAL
Output: Return val would be 0 and the input value to API will not
        get updated. A_h would be INITIAL_VAL, B_h is 0
*/
HIP_TEST_CASE(Unit_BuiltinAtomics_fmaxCoherentGlobalMem) {
  hipDeviceProp_t prop;
  int device;
  HIP_CHECK(hipGetDevice(&device));
  HIP_CHECK(hipGetDeviceProperties(&prop, device));
  std::string gfxName(prop.gcnArchName);
  if ((gfxName == "gfx90a" || gfxName.find("gfx90a:")) == 0) {
    if (prop.canMapHostMemory != 1) {
      HIP_SKIP_TEST(HipTest::SkipReason::kHostPinnedMemoryUnsupported);
    } else {
      double *A_h, *B_h;
      double* A_d;
      double* result;
      HIP_CHECK(
          hipHostMalloc(reinterpret_cast<void**>(&A_h), sizeof(double), hipHostMallocCoherent));
      A_h[0] = INITIAL_VAL;
      HIP_CHECK(hipHostGetDevicePointer(reinterpret_cast<void**>(&A_d), A_h, 0));
      B_h = reinterpret_cast<double*>(malloc(sizeof(double)));
      HIP_CHECK(hipMalloc(reinterpret_cast<void**>(&result), sizeof(double)));
      hipLaunchKernelGGL(unsafeAtomicMax_GlobalMem, dim3(1), dim3(1), 0, 0,
                         static_cast<double*>(A_d), result);
      HIP_CHECK(hipGetLastError());
      HIP_CHECK(hipDeviceSynchronize());
      HIP_CHECK(hipMemcpy(B_h, result, sizeof(double), hipMemcpyDeviceToHost));
      REQUIRE(*B_h == 0);
      REQUIRE(A_h[0] == INITIAL_VAL);
      HIP_CHECK(hipHostFree(A_h));
      HIP_CHECK(hipFree(result));
      free(B_h);
    }
  } else {
    {
      std::string const skip_gfx_msg = std::string(
          "Memory model feature is only supported for gfx90a, Hence"
          "skipping the testcase for this GPU ") +
          std::to_string(device);
      HIP_SKIP_TEST(skip_gfx_msg.c_str());
    }
  }
}

/*
This testcase verifies the builtinAtomic fmax API
1. Non Coherent memory with memory type as global
2. Memory type as flat
Input: A_h with INITIAL_VAL
Output: Return val would be initial val of A_h and the input value of
        API would be updated with the max value
        A_h would be 10, B_h would be INITIAL_VAL
*/
HIP_TEST_CASE(Unit_BuiltinAtomics_fmaxNonCoherentGlobalFlatMem) {
  int mem_type = GENERATE(0, 1);
  hipDeviceProp_t prop;
  int device;
  HIP_CHECK(hipGetDevice(&device));
  HIP_CHECK(hipGetDeviceProperties(&prop, device));
  std::string gfxName(prop.gcnArchName);
  if ((gfxName == "gfx90a" || gfxName.find("gfx90a:")) == 0) {
    if (prop.canMapHostMemory != 1) {
      HIP_SKIP_TEST(HipTest::SkipReason::kHostPinnedMemoryUnsupported);
    } else {
      double *A_h, *B_h;
      double* A_d;
      double* result;
      HIP_CHECK(
          hipHostMalloc(reinterpret_cast<void**>(&A_h), sizeof(double), hipHostMallocNonCoherent));
      A_h[0] = INITIAL_VAL;
      HIP_CHECK(hipHostGetDevicePointer(reinterpret_cast<void**>(&A_d), A_h, 0));
      B_h = reinterpret_cast<double*>(malloc(sizeof(double)));
      HIP_CHECK(hipMalloc(reinterpret_cast<void**>(&result), sizeof(double)));
      if (mem_type) {
        hipLaunchKernelGGL(unsafeAtomicMax_GlobalMem, dim3(1), dim3(1), 0, 0,
                           static_cast<double*>(A_d), result);
        HIP_CHECK(hipGetLastError());
      } else {
        hipLaunchKernelGGL(unsafeAtomicMax_FlatMem, dim3(1), dim3(1), 0, 0,
                           static_cast<double*>(A_d), result);
        HIP_CHECK(hipGetLastError());
      }
      HIP_CHECK(hipDeviceSynchronize());
      HIP_CHECK(hipMemcpy(B_h, result, sizeof(double), hipMemcpyDeviceToHost));
      REQUIRE(*B_h == INITIAL_VAL);
      REQUIRE(A_h[0] == 10);
      HIP_CHECK(hipHostFree(A_h));
      HIP_CHECK(hipFree(result));
      free(B_h);
    }
  } else {
    {
      std::string const skip_gfx_msg = std::string(
          "Memory model feature is only supported for gfx90a, Hence"
          "skipping the testcase for this GPU ") +
          std::to_string(device);
      HIP_SKIP_TEST(skip_gfx_msg.c_str());
    }
  }
}
/*
This testcase verifies the builtinAtomic fmax API on Coherent memory
with RTC and memory type as global
Input: A_h with INITIAL_VAL
Output: Return val would be 0 and the input value to API will not
        get updated. A_h would be INITIAL_VAL, B_h is 0
*/
HIP_TEST_CASE(Unit_BuiltinAtomicsRTC_fmaxCoherentGlobalMem) {
  hipDeviceProp_t prop;
  int device;
  HIP_CHECK(hipGetDevice(&device));
  HIP_CHECK(hipGetDeviceProperties(&prop, device));
  std::string gfxName(prop.gcnArchName);
  if ((gfxName == "gfx90a" || gfxName.find("gfx90a:")) == 0) {
    if (prop.canMapHostMemory != 1) {
      HIP_SKIP_TEST(HipTest::SkipReason::kHostPinnedMemoryUnsupported);
    } else {
      hiprtcProgram prog;
      hiprtcCreateProgram(&prog,          // prog
                          fmaxGlobalMem,  // buffer
                          "kernel.cu",    // name
                          0, nullptr, nullptr);
      std::string sarg = std::string("--gpu-architecture=") + prop.gcnArchName;
      const char* options[] = {sarg.c_str()};
      hiprtcResult compileResult{hiprtcCompileProgram(prog, 1, options)};

      size_t logSize;
      HIPRTC_CHECK(hiprtcGetProgramLogSize(prog, &logSize));
      if (logSize) {
        std::string log(logSize, '\0');
        HIPRTC_CHECK(hiprtcGetProgramLog(prog, &log[0]));
        INFO(log);
      }

      REQUIRE(compileResult == HIPRTC_SUCCESS);
      size_t codeSize;
      HIPRTC_CHECK(hiprtcGetCodeSize(prog, &codeSize));

      std::vector<char> code(codeSize);
      HIPRTC_CHECK(hiprtcGetCode(prog, code.data()));
      HIPRTC_CHECK(hiprtcDestroyProgram(&prog));

      hipModule_t module;
      hipFunction_t fmaxkernel;
      HIP_CHECK(hipModuleLoadData(&module, code.data()));
      HIP_CHECK(hipModuleGetFunction(&fmaxkernel, module, "unsafeAtomicMax_GlobalMem"));

      double *A_h, *B_h;
      double* A_d;
      double* result;
      HIP_CHECK(
          hipHostMalloc(reinterpret_cast<void**>(&A_h), sizeof(double), hipHostMallocCoherent));
      A_h[0] = INITIAL_VAL;
      HIP_CHECK(hipHostGetDevicePointer(reinterpret_cast<void**>(&A_d), A_h, 0));
      B_h = reinterpret_cast<double*>(malloc(sizeof(double)));
      HIP_CHECK(hipMalloc(reinterpret_cast<void**>(&result), sizeof(double)));
      struct {
        double* p;
        double* res;
      } args_f{A_d, result};
      auto size = sizeof(args_f);
      void* config_d[] = {HIP_LAUNCH_PARAM_BUFFER_POINTER, &args_f, HIP_LAUNCH_PARAM_BUFFER_SIZE,
                          &size, HIP_LAUNCH_PARAM_END};
      HIP_CHECK(hipModuleLaunchKernel(fmaxkernel, 1, 1, 1, 1, 1, 1, 0, nullptr, nullptr, config_d));
      HIP_CHECK(hipDeviceSynchronize());
      HIP_CHECK(hipMemcpy(B_h, result, sizeof(double), hipMemcpyDeviceToHost));
      REQUIRE(*B_h == 0);
      REQUIRE(A_h[0] == INITIAL_VAL);
      HIP_CHECK(hipHostFree(A_h));
      HIP_CHECK(hipFree(result));
      free(B_h);
    }
  } else {
    {
      std::string const skip_gfx_msg = std::string(
          "Memory model feature is only supported for gfx90a, Hence"
          "skipping the testcase for this GPU ") +
          std::to_string(device);
      HIP_SKIP_TEST(skip_gfx_msg.c_str());
    }
  }
}
/*
This testcase verifies the builtinAtomic fmax API with RTC
1. Non Coherent memory with memory type as global
2. Memory type as flat
Input: A_h with INITIAL_VAL
Output: Return val would be initial val of A_h and the input value of
        API would be updated with the max value
        A_h would be 10, B_h would be INITIAL_VAL
*/
HIP_TEST_CASE(Unit_BuiltinAtomicsRTC_fmaxNonCoherentGlobalFlatMem) {
  int mem_type = GENERATE(0, 1);
  hipDeviceProp_t prop;
  int device;
  HIP_CHECK(hipGetDevice(&device));
  HIP_CHECK(hipGetDeviceProperties(&prop, device));
  std::string gfxName(prop.gcnArchName);
  if ((gfxName == "gfx90a" || gfxName.find("gfx90a:")) == 0) {
    if (prop.canMapHostMemory != 1) {
      HIP_SKIP_TEST(HipTest::SkipReason::kHostPinnedMemoryUnsupported);
    } else {
      hiprtcProgram prog;
      if (mem_type) {
        hiprtcCreateProgram(&prog,          // prog
                            fmaxGlobalMem,  // buffer
                            "kernel.cu",    // name
                            0, nullptr, nullptr);
      } else {
        hiprtcCreateProgram(&prog,        // prog
                            fmaxFlatMem,  // buffer
                            "kernel.cu",  // name
                            0, nullptr, nullptr);
      }
      std::string sarg = std::string("--gpu-architecture=") + prop.gcnArchName;
      const char* options[] = {sarg.c_str()};
      hiprtcResult compileResult{hiprtcCompileProgram(prog, 1, options)};

      size_t logSize;
      HIPRTC_CHECK(hiprtcGetProgramLogSize(prog, &logSize));
      if (logSize) {
        std::string log(logSize, '\0');
        HIPRTC_CHECK(hiprtcGetProgramLog(prog, &log[0]));
        INFO(log);
      }
      REQUIRE(compileResult == HIPRTC_SUCCESS);
      size_t codeSize;
      HIPRTC_CHECK(hiprtcGetCodeSize(prog, &codeSize));

      std::vector<char> code(codeSize);
      HIPRTC_CHECK(hiprtcGetCode(prog, code.data()));
      HIPRTC_CHECK(hiprtcDestroyProgram(&prog));

      hipModule_t module;
      hipFunction_t fmaxkernel;
      HIP_CHECK(hipModuleLoadData(&module, code.data()));
      if (mem_type) {
        HIP_CHECK(hipModuleGetFunction(&fmaxkernel, module, "unsafeAtomicMax_GlobalMem"));
      } else {
        HIP_CHECK(hipModuleGetFunction(&fmaxkernel, module, "unsafeAtomicMax_FlatMem"));
      }

      double *A_h, *B_h;
      double* A_d;
      double* result;
      HIP_CHECK(
          hipHostMalloc(reinterpret_cast<void**>(&A_h), sizeof(double), hipHostMallocNonCoherent));
      A_h[0] = INITIAL_VAL;
      HIP_CHECK(hipHostGetDevicePointer(reinterpret_cast<void**>(&A_d), A_h, 0));
      B_h = reinterpret_cast<double*>(malloc(sizeof(double)));
      HIP_CHECK(hipMalloc(reinterpret_cast<void**>(&result), sizeof(double)));
      struct {
        double* p;
        double* res;
      } args_f{A_d, result};
      auto size = sizeof(args_f);
      void* config_d[] = {HIP_LAUNCH_PARAM_BUFFER_POINTER, &args_f, HIP_LAUNCH_PARAM_BUFFER_SIZE,
                          &size, HIP_LAUNCH_PARAM_END};
      HIP_CHECK(hipModuleLaunchKernel(fmaxkernel, 1, 1, 1, 1, 1, 1, 0, nullptr, nullptr, config_d));
      HIP_CHECK(hipDeviceSynchronize());
      HIP_CHECK(hipMemcpy(B_h, result, sizeof(double), hipMemcpyDeviceToHost));
      REQUIRE(*B_h == INITIAL_VAL);
      REQUIRE(A_h[0] == 10);
      HIP_CHECK(hipHostFree(A_h));
      HIP_CHECK(hipFree(result));
      free(B_h);
    }
  } else {
    {
      std::string const skip_gfx_msg = std::string(
          "Memory model feature is only supported for gfx90a, Hence"
          "skipping the testcase for this GPU ") +
          std::to_string(device);
      HIP_SKIP_TEST(skip_gfx_msg.c_str());
    }
  }
}