/*
Copyright (c) 2026 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 <hip_test_common.hh>

#include <vector>
#include <string>

#include <hip/hiprtc.h>
#include <hip/hip_fp8.h>

TEST_CASE("Unit_hiprtc_fp8_simple") {
  constexpr const char* source = R"(
extern "C" __global__ void float_to_fp8_to_float(float* out, float* in, bool e4m3, size_t size) {
  size_t i = threadIdx.x;
  if (i < size) {
    if (e4m3) {
#ifdef __gfx942__
      __hip_fp8_e4m3_fnuz tmp = in[i];
#else
      __hip_fp8_e4m3 tmp = in[i];
#endif
      out[i] = tmp;
    } else {
#ifdef __gfx942__
      __hip_fp8_e5m2_fnuz tmp = in[i];
#else
      __hip_fp8_e5m2 tmp = in[i];
#endif
      out[i] = tmp;
    }
  }
}
)";

  hiprtcProgram prog;
  HIPRTC_CHECK(hiprtcCreateProgram(&prog, source, "fp8.cu", 0, nullptr, nullptr));
  hipDeviceProp_t props;
  int device = 0;
  HIP_CHECK(hipGetDeviceProperties(&props, device));
#ifdef __HIP_PLATFORM_AMD__
  std::string sarg = std::string("--gpu-architecture=") + props.gcnArchName;
#else
  std::string sarg = std::string("--fmad=false");
#endif
  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]));
    std::cout << log << '\n';
  }
  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));

  constexpr size_t size = 10;

  float *d_in, *d_out;
  HIP_CHECK(hipMalloc(&d_in, size * sizeof(float)));
  HIP_CHECK(hipMalloc(&d_out, size * sizeof(float)));

  hipModule_t module;
  hipFunction_t kernel;
  HIP_CHECK(hipModuleLoadData(&module, code.data()));
  HIP_CHECK(hipModuleGetFunction(&kernel, module, "float_to_fp8_to_float"));

  std::vector<float> in(size, 0.0f);
  for (size_t i = 0; i < size; i++) {
    in[i] = -5.0f + i;
  }

  HIP_CHECK(hipMemcpy(d_in, in.data(), size * sizeof(float), hipMemcpyHostToDevice));
  HIP_CHECK(hipMemset(d_out, 0, size * sizeof(float)));

  struct {
    float* out;
    float* in;
    bool e4m3;
    size_t size;
  } args{d_out, d_in, true, size};

  auto arg_size = sizeof(args);
  void* config[] = {HIP_LAUNCH_PARAM_BUFFER_POINTER, &args, HIP_LAUNCH_PARAM_BUFFER_SIZE, &arg_size,
                    HIP_LAUNCH_PARAM_END};

  HIP_CHECK(hipModuleLaunchKernel(kernel, 1, 1, 1, size, 1, 1, 0, nullptr, nullptr, config));

  std::vector<float> out(size, 0.0f);
  HIP_CHECK(hipMemcpy(out.data(), d_out, size * sizeof(float), hipMemcpyDeviceToHost));

  for (size_t i = 0; i < size; i++) {
    __hip_fp8_e4m3 tmp = in[i];
    float cpu_out = tmp;
    INFO("Index: " << i << " in: " << in[i] << " GPU: " << out[i] << " cpu: " << cpu_out);
    REQUIRE(cpu_out == out[i]);
  }

  args.e4m3 = false;
  HIP_CHECK(hipMemset(d_out, 0, size * sizeof(float)));
  HIP_CHECK(hipModuleLaunchKernel(kernel, 1, 1, 1, size, 1, 1, 0, nullptr, nullptr, config));

  HIP_CHECK(hipMemcpy(out.data(), d_out, size * sizeof(float), hipMemcpyDeviceToHost));
  for (size_t i = 0; i < size; i++) {
    __hip_fp8_e5m2 tmp = in[i];
    float cpu_out = tmp;
    INFO("Index: " << i << " in: " << in[i] << " GPU: " << out[i] << " cpu: " << cpu_out);
    REQUIRE(cpu_out == out[i]);
  }

  HIP_CHECK(hipFree(d_in));
  HIP_CHECK(hipFree(d_out));

  HIP_CHECK(hipModuleUnload(module));
}