message: Log if tf32 is used for matmul.
diff: @@ -1686,6 +1686,15 @@ bool CUDABlas::DoBlasGemm(Stream *stream, blas::Transpose transa,
  cublasMath_t math_type = CUBLAS_DEFAULT_MATH;
  #else
  cublasMath_t math_type = CUBLAS_TF32_TENSOR_OP_MATH;
  + int cc_major, cc_minor;
  + if (stream->parent()->GetDeviceDescription().cuda_compute_capability(
  + &cc_major, &cc_minor) &&
  + cc_major >= 8) {
  + // TODO(reedwm): Remove or make this VLOG(1) once TensorFloat-32 is more
  + // well tested.
  + LOG_FIRST_N(INFO, 1) << "TensorFloat-32 will be used for the matrix "
  + "multiplication. This will only be logged once.";
  + }
  #endif
  return DoBlasInternalImpl(
  