cuda_compat.h

#pragma once

#ifdef USE_ROCM
  #include <hip/hip_runtime.h>
#endif

#ifdef USE_ROCM
struct Utils {
  static __host__ int get_warp_size() {
    static bool is_cached = false;
    static int result;

    if (!is_cached) {
      int device_id;
      cudaDeviceProp deviceProp;
      cudaGetDevice(&device_id);
      cudaGetDeviceProperties(&deviceProp, device_id);

      result = deviceProp.warpSize;
      is_cached = true;
    }

    return result;
  }

  static __device__ constexpr int get_warp_size() {
  #ifdef __GFX9__
    return 64;
  #else
    return 32;
  #endif
  }
};

  #define WARP_SIZE Utils::get_warp_size()
#else
  #define WARP_SIZE 32
#endif

#ifndef USE_ROCM
  #define VLLM_LDG(arg) __ldg(arg)
#else
  #define VLLM_LDG(arg) *(arg)
#endif

#ifndef USE_ROCM
  #define VLLM_SHFL_XOR_SYNC(var, lane_mask) \
    __shfl_xor_sync(uint32_t(-1), var, lane_mask)
  #define VLLM_SHFL_XOR_SYNC_WIDTH(var, lane_mask, width) \
    __shfl_xor_sync(uint32_t(-1), var, lane_mask, width)
#else
  #define VLLM_SHFL_XOR_SYNC(var, lane_mask) __shfl_xor(var, lane_mask)
  #define VLLM_SHFL_XOR_SYNC_WIDTH(var, lane_mask, width) \
    __shfl_xor(var, lane_mask, width)
#endif

#ifndef USE_ROCM
  #define VLLM_SHFL_SYNC(var, src_lane) __shfl_sync(uint32_t(-1), var, src_lane)
#else
  #define VLLM_SHFL_SYNC(var, src_lane) __shfl(var, src_lane)
#endif

#ifndef USE_ROCM
  #define VLLM_SHFL_DOWN_SYNC(var, lane_delta) \
    __shfl_down_sync(uint32_t(-1), var, lane_delta)
#else
  #define VLLM_SHFL_DOWN_SYNC(var, lane_delta) __shfl_down(var, lane_delta)
#endif

#ifndef USE_ROCM
  #define VLLM_DevFuncAttribute_SET_MaxDynamicSharedMemorySize(FUNC, VAL) \
    cudaFuncSetAttribute(FUNC, cudaFuncAttributeMaxDynamicSharedMemorySize, VAL)
#else
  #define VLLM_DevFuncAttribute_SET_MaxDynamicSharedMemorySize(FUNC, VAL) \
    hipFuncSetAttribute(FUNC, hipFuncAttributeMaxDynamicSharedMemorySize, VAL)
#endif