Template for ELPA 2stage C-interface

Makefile.am

@@ -54,6 +54,7 @@ EXTRA_libelpa@SUFFIX@_private_la_DEPENDENCIES = \
 		src/elpa1_template.X90 \
 		src/elpa2_template.X90 \
 		src/elpa1_c_interface_template.X90 \
+		src/elpa2_c_interface_template.X90 \
 	src/elpa2_bandred_template.X90 \
 	src/elpa2_symm_matrix_allreduce_real_template.X90 \
 	src/elpa2_trans_ev_band_to_full_template.X90 \
@@ -975,6 +976,7 @@ EXTRA_DIST = \
   src/elpa1_template.X90 \
   src/elpa2_template.X90 \
   src/elpa1_c_interface_template.X90 \
+  src/elpa2_c_interface_template.X90 \
   src/elpa2_tridiag_band_template.X90 \
   src/elpa2_trans_ev_band_to_full_template.X90 \
   src/elpa2_trans_ev_tridi_to_band_template.X90 \

src/elpa2_c_interface_template.X90

+  function solve_elpa2_evp_&
+  &MATH_DATATYPE&
+  &_wrapper_&
+  &PRECISION&
+  & (na, nev, a, lda, ev, q, ldq, nblk, matrixCols, mpi_comm_rows, mpi_comm_cols, mpi_comm_all, &
+#if REALCASE == 1
+    THIS_REAL_ELPA_KERNEL_API, useQR, &
+#endif
+#if COMPLEXCASE == 1
+    THIS_COMPLEX_ELPA_KERNEL_API, &
+#endif
+    useGPU)  result(success) bind(C,name="elpa_solve_evp_&
+    &MATH_DATATYPE&
+    &_2stage_&
+    &PRECISION&
+    &_precision")
+    use, intrinsic :: iso_c_binding
+    use elpa2
+
+    implicit none
+    integer(kind=c_int)                    :: success
+    integer(kind=c_int), value, intent(in) :: na, nev, lda, ldq, nblk, matrixCols, mpi_comm_cols, mpi_comm_rows, &
+                                              mpi_comm_all
+    integer(kind=c_int), value, intent(in) :: useGPU
+#if REALCASE == 1
+    integer(kind=c_int), value, intent(in) :: THIS_REAL_ELPA_KERNEL_API, useQR
+#endif
+#if COMPLEXCASE == 1
+    integer(kind=c_int), value, intent(in) :: THIS_COMPLEX_ELPA_KERNEL_API
+#endif
+
+    real(kind=C_DATATYPE_KIND)             :: ev(1:na)
+#if REALCASE == 1
+#ifdef USE_ASSUMED_SIZE
+    real(kind=C_DATATYPE_KIND)             :: a(lda,*), q(ldq,*)
+#else
+    real(kind=C_DATATYPE_KIND)             :: a(1:lda,1:matrixCols), q(1:ldq,1:matrixCols)
+#endif
+#endif /* REALCASE */
+
+#if COMPLEXCASE == 1
+#ifdef USE_ASSUMED_SIZE
+    complex(kind=C_DATATYPE_KIND)          :: a(lda,*), q(ldq,*)
+#else
+    complex(kind=C_DATATYPE_KIND)          :: a(1:lda,1:matrixCols), q(1:ldq,1:matrixCols)
+#endif
+#endif /* COMPLEXCASE */
+
+    logical                                :: successFortran, useQRFortran
+
+#if REALCASE == 1
+    if (useQR .eq. 0) then
+      useQRFortran =.false.
+    else
+      useQRFortran = .true.
+    endif
+#endif
+      successFortran = elpa_solve_evp_&
+      &MATH_DATATYPE&
+      &_2stage_&
+      &PRECISION&
+      & (na, nev, a, lda, ev, q, ldq, nblk, matrixCols, mpi_comm_rows, &
+         mpi_comm_cols, mpi_comm_all, &
+#if REALCASE == 1
+	 THIS_REAL_ELPA_KERNEL_API, useQRFortran, &
+#endif
+#if COMPLEXCASE == 1
+	 THIS_COMPLEX_ELPA_KERNEL_API, &
+#endif
+	 useGPU == 1)
+
+    if (successFortran) then
+      success = 1
+    else
+      success = 0
+    endif
+
+  end function
+