message: function to obtain position of left most significant bit
diff: #include <string>
  #include <algorithm>
  +// Return the leftmost significant bit position
  +#if defined(rocsparse_ILP64)
  +static inline rocsparse_int rocsparse_clz(rocsparse_int n)
  +{
  + return 64 - __builtin_clzll(n);
  +}
  +#else
  +static inline rocsparse_int rocsparse_clz(rocsparse_int n)
  +{
  + return 32 - __builtin_clz(n);
  +}
  +#endif
  +
  // if trace logging is turned on with
  // (handle->layer_mode & rocsparse_layer_mode_log_trace) == true
  // then
  