change data types from double to amrex::Real, and thus we can use sin…

…gle precision for the hypre IJ interface (AMReX-Codes#2896)

Co-authored-by: yzeng <yzeng@altair.com>

Src/Extern/HYPRE/AMReX_HypreIJIface.H

@@ -93,11 +93,11 @@ private:
     HypreIntType (*m_precondSolvePtr)(
         HYPRE_Solver, HYPRE_ParCSRMatrix, HYPRE_ParVector, HYPRE_ParVector){nullptr};
 
-    HypreIntType (*m_solverSetTolPtr)(HYPRE_Solver, double){nullptr};
-    HypreIntType (*m_solverSetAbsTolPtr)(HYPRE_Solver, double){nullptr};
+    HypreIntType (*m_solverSetTolPtr)(HYPRE_Solver, amrex::Real){nullptr};
+    HypreIntType (*m_solverSetAbsTolPtr)(HYPRE_Solver, amrex::Real){nullptr};
     HypreIntType (*m_solverSetMaxIterPtr)(HYPRE_Solver, HypreIntType){nullptr};
     HypreIntType (*m_solverNumItersPtr)(HYPRE_Solver, HypreIntType*){nullptr};
-    HypreIntType (*m_solverFinalResidualNormPtr)(HYPRE_Solver, double*){nullptr};
+    HypreIntType (*m_solverFinalResidualNormPtr)(HYPRE_Solver, amrex::Real*){nullptr};
 
     HypreIntType m_ilower{0};
     HypreIntType m_iupper{0};

Src/Extern/HYPRE/AMReX_HypreIJIface.cpp

@@ -275,7 +275,7 @@ void HypreIJIface::boomeramg_precond_configure (const std::string& prefix)
 
         if (hpp.pp.contains("bamg_non_galerkin_level_tols")) {
             std::vector<int> levels;
-            std::vector<double> tols;
+            std::vector<amrex::Real> tols;
             hpp.pp.getarr("bamg_non_galerkin_level_levels", levels);
             hpp.pp.getarr("bamg_non_galerkin_level_tols", tols);