use float constants and functions in float functions

[njzjz]

Before this commit, almost all functions use double constants even under float precision. We know that a float will cast to double when adding/multiplying double.
This PR also uses sqrtf and fmodf for GPU device float functions, instead of double sqrt and fmod.

[codecov-commenter]

Codecov Report

Merging #1647 (90cb99f) into devel (de7ba72) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##            devel    #1647   +/-   ##
=======================================
  Coverage   76.15%   76.15%           
=======================================
  Files          94       94           
  Lines        7850     7850           
=======================================
  Hits         5978     5978           
  Misses       1872     1872           

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[njzjz]

CI failure also happens on the devel... Not sure what happened.

[wanghan-iapcm]

Does your revision pass the UTs on GPU?

[njzjz]

Does your revision pass the UTs on GPU?

I cannot build the UTs on GPU even on the devel branch. Here is the error message:

/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc: In member function 'virtual void TestTabulateSeR_tabulate_fusion_se_r_grad_gpu_cuda_Test::TestBody()':
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:5: error: 'dy_dem_dev' was not declared in this scope
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
     ^~~~~~~~~~
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:5: note: suggested alternative: 'dy_dem'
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
     ^~~~~~~~~~
     dy_dem
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:26: error: 'table_dev' was not declared in this scope
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                          ^~~~~~~~~
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:26: note: suggested alternative: 'table'
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                          ^~~~~~~~~
                          table
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:46: error: 'em_dev' was not declared in this scope
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                                              ^~~~~~
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:46: note: suggested alternative: 'dy_dem'
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                                              ^~~~~~
                                              dy_dem
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:63: error: 'dy_dev' was not declared in this scope
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                                                               ^~~~~~
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:63: note: suggested alternative: 'dy_dem'
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                                                               ^~~~~~
                                                               dy_dem
make[2]: *** [CMakeFiles/runUnitTests.dir/build.make:426: CMakeFiles/runUnitTests.dir/test_tabulate_se_r.cc.o] Error 1

[wanghan-iapcm]

Does your revision pass the UTs on GPU?

I cannot build the UTs on GPU even on the devel branch. Here is the error message:

/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc: In member function 'virtual void TestTabulateSeR_tabulate_fusion_se_r_grad_gpu_cuda_Test::TestBody()':
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:5: error: 'dy_dem_dev' was not declared in this scope
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
     ^~~~~~~~~~
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:5: note: suggested alternative: 'dy_dem'
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
     ^~~~~~~~~~
     dy_dem
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:26: error: 'table_dev' was not declared in this scope
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                          ^~~~~~~~~
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:26: note: suggested alternative: 'table'
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                          ^~~~~~~~~
                          table
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:46: error: 'em_dev' was not declared in this scope
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                                              ^~~~~~
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:46: note: suggested alternative: 'dy_dem'
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                                              ^~~~~~
                                              dy_dem
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:63: error: 'dy_dev' was not declared in this scope
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                                                               ^~~~~~
/home/jz748/codes/deepmd-kit/source/lib/tests/test_tabulate_se_r.cc:125:63: note: suggested alternative: 'dy_dem'
   * dy_dem_dev = NULL, * table_dev = NULL, * em_dev = NULL, * dy_dev = NULL;
                                                               ^~~~~~
                                                               dy_dem
make[2]: *** [CMakeFiles/runUnitTests.dir/build.make:426: CMakeFiles/runUnitTests.dir/test_tabulate_se_r.cc.o] Error 1

Should be fixed by #1651

[njzjz]

Does your revision pass the UTs on GPU?

Yes.

[denghuilu]

All UTs within the api_cc and lib folders have passed in an ROCm GPU environment, except this one:

Not found: Op type not registered 'MatrixDiagV3' in binary running on j17r2n14. Make sure the Op and Kernel are registered in the binary running in this process. Note that if you are loading a saved graph which used ops from tf.contrib, accessing (e.g.) `tf.contrib.resampler` should be done before importing the graph, as contrib ops are lazily registered when the module is first accessed.
unknown file: Failure
C++ exception with description "DeePMD-kit Error: TensorFlow Error: Not found: Op type not registered 'MatrixDiagV3' in binary running on j17r2n14. Make sure the Op and Kernel are registered in the binary running in this process. Note that if you are loading a saved graph which used ops from tf.contrib, accessing (e.g.) `tf.contrib.resampler` should be done before importing the graph, as contrib ops are lazily registered when the module is first accessed." thrown in SetUp().
[  FAILED  ] TestInferDeepPolarNew.cpu_build_nlist (378 ms)

It's a TF library problem obviously, so it should have little effect on the correctness of the test program.