Line data    Source code

       1              : // Copyright 2024, UChicago Argonne, LLC
       2              : // All Rights Reserved
       3              : // Software Name: NEML2 -- the New Engineering material Model Library, version 2
       4              : // By: Argonne National Laboratory
       5              : // OPEN SOURCE LICENSE (MIT)
       6              : //
       7              : // Permission is hereby granted, free of charge, to any person obtaining a copy
       8              : // of this software and associated documentation files (the "Software"), to deal
       9              : // in the Software without restriction, including without limitation the rights
      10              : // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      11              : // copies of the Software, and to permit persons to whom the Software is
      12              : // furnished to do so, subject to the following conditions:
      13              : //
      14              : // The above copyright notice and this permission notice shall be included in
      15              : // all copies or substantial portions of the Software.
      16              : //
      17              : // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      18              : // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      19              : // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      20              : // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      21              : // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      22              : // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
      23              : // THE SOFTWARE.
      24              : 
      25              : #include <limits>
      26              : #include <iostream>
      27              : 
      28              : #include "neml2/misc/types.h"
      29              : #include "neml2/misc/errors.h"
      30              : 
      31              : namespace neml2
      32              : {
      33              : CScalar
      34           83 : machine_precision(Dtype dtype)
      35              : {
      36           83 :   switch (dtype)
      37              :   {
      38           83 :     case kFloat64:
      39           83 :       return std::numeric_limits<double>::epsilon();
      40            0 :     case kFloat32:
      41            0 :       return std::numeric_limits<float>::epsilon();
      42            0 :     case kFloat16:
      43              :       // Note: C++ has no native float16 type prior to c++23; approximation needed
      44            0 :       return 0.00097656f; // ~2^-10
      45            0 :     default:
      46            0 :       throw NEMLException("Unsupported dtype for machine precision");
      47              :   }
      48              : }
      49              : 
      50              : std::ostream &
      51            0 : operator<<(std::ostream & os, FType f)
      52              : {
      53            0 :   if (f == FType::NONE)
      54            0 :     os << "NONE";
      55            0 :   else if (f == FType::INPUT)
      56            0 :     os << "INPUT";
      57            0 :   else if (f == FType::OUTPUT)
      58            0 :     os << "OUTPUT";
      59            0 :   else if (f == FType::PARAMETER)
      60            0 :     os << "PARAMETER";
      61            0 :   else if (f == FType::BUFFER)
      62            0 :     os << "BUFFER";
      63              :   else
      64            0 :     throw NEMLException("Unknown FType");
      65              : 
      66            0 :   return os;
      67              : }
      68              : } // namespace neml2