cutlass/tools/profiler/src/cublas_helpers.h

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/* \file
   \brief Helper functions for mapping CUTLASS concepts to cuBLAS.
*/

#pragma once

#if CUTLASS_ENABLE_CUBLAS
#include <cublas_v2.h>

#include "cutlass/cutlass.h"
#include "cutlass/library/library.h"

/////////////////////////////////////////////////////////////////////////////////////////////////

namespace cutlass {
namespace profiler {

/////////////////////////////////////////////////////////////////////////////////////////////////

/// Converts a cuBLAS status to cutlass::Status
Status get_cutlass_status(cublasStatus_t cublas);

/// Maps a CUTLASS tensor layout to a cuBLAS transpose operation
cublasOperation_t get_cublas_transpose_operation(library::LayoutTypeID layout);

/// Maps a CUTLASS numeric type to a cuBLAS data type enumeration
bool get_cublas_datatype(cublasDataType_t &data_type, library::NumericTypeID element_type);

/// Gets the cublas algorithm given threadblock tile dimensions and math opcode class
cublasGemmAlgo_t get_cublas_gemm_algo(
  int cta_m, 
  int cta_n, 
  int cta_k, 
  library::OpcodeClassID opcode_class);

/// Returns a status if cuBLAS can satisfy a particular GEMM description
Status cublas_satisfies(library::GemmDescription const &desc);

/// This is a helper class to create cublasHandle_t automatically on CublasCreate object creation and 
/// to destroy cublasHandle_t on CublasCreate object destruction. 
/// Additionaly, it provides implicit cast from CublasCreate's object to cublasHandle_t's object
class CublasCreate {
private:
	cublasHandle_t handle;
	cublasStatus_t status;

public:
	CublasCreate() {
		status = cublasCreate(&handle);
	}

	~CublasCreate() {
		cublasDestroy(handle);
	}

    /// Implicit cast CublasCreate object to cublasHandle_t
    operator cublasHandle_t() const { return handle; }

    /// returns cublasStatus_t for handle creation
    cublasStatus_t get_cublas_create_status() { return status; }
};

/////////////////////////////////////////////////////////////////////////////////////////////////

} // namespace profiler
} // namespace cutlass


#endif // #if CUTLASS_ENABLE_CUBLAS