device_math.F90

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module device_math
  use comm
  use utils, only : neko_error
  use num_types, only : rp, c_rp
  use, intrinsic :: iso_c_binding
  implicit none
  private
 
#ifdef HAVE_HIP
  interface
     subroutine hip_copy(a_d, b_d, n) &
          bind(c, name='hip_copy')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine hip_copy
  end interface
 
  interface
     subroutine hip_masked_copy(a_d, b_d, mask_d, n, m) &
          bind(c, name='hip_masked_copy')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: a_d, b_d, mask_d
       integer(c_int) :: n, m
     end subroutine hip_masked_copy
  end interface
  
  interface
     subroutine hip_cfill_mask(a_d, c, size, mask_d, mask_size) &
          bind(c, name='hip_cfill_mask')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: size
       type(c_ptr), value :: mask_d
       integer(c_int) :: mask_size
     end subroutine hip_cfill_mask
  end interface
 
  interface
     subroutine hip_cmult(a_d, c, n) &
          bind(c, name='hip_cmult')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine hip_cmult
  end interface
 
  interface
     subroutine hip_cmult2(a_d, b_d, c, n) &
          bind(c, name='hip_cmult2')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine hip_cmult2
  end interface
 
  interface
     subroutine hip_cadd(a_d, c, n) &
          bind(c, name='hip_cadd')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine hip_cadd
  end interface
 
  interface
     subroutine hip_cadd2(a_d, b_d, c, n) &
          bind(c, name='hip_cadd2')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       type(c_ptr), value :: b_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine hip_cadd2
  end interface
 
  interface
     subroutine hip_cfill(a_d, c, n) &
          bind(c, name='hip_cfill')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine hip_cfill
  end interface
 
  interface
     subroutine hip_rzero(a_d, n) &
          bind(c, name='hip_rzero')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: a_d
       integer(c_int) :: n
     end subroutine hip_rzero
  end interface
 
  interface
     subroutine hip_add2(a_d, b_d, n) &
          bind(c, name='hip_add2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine hip_add2
  end interface
 
  interface
     subroutine hip_add2s1(a_d, b_d, c1, n) &
          bind(c, name='hip_add2s1')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c1
       integer(c_int) :: n
     end subroutine hip_add2s1
  end interface
 
  interface
     subroutine hip_add2s2(a_d, b_d, c1, n) &
          bind(c, name='hip_add2s2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c1
       integer(c_int) :: n
     end subroutine hip_add2s2
  end interface
 
  interface
     subroutine hip_add2s2_many(y_d,x_d_d,a_d,j,n) &
          bind(c, name='hip_add2s2_many')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: y_d, x_d_d, a_d
       integer(c_int) :: j, n
     end subroutine hip_add2s2_many
  end interface
 
  interface
     subroutine hip_addsqr2s2(a_d, b_d, c1, n) &
          bind(c, name='hip_addsqr2s2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c1
       integer(c_int) :: n
     end subroutine hip_addsqr2s2
  end interface
 
  interface
     subroutine hip_add3s2(a_d, b_d, c_d, c1, c2, n) &
          bind(c, name='hip_add3s2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       real(c_rp) :: c1, c2
       integer(c_int) :: n
     end subroutine hip_add3s2
  end interface
 
  interface
     subroutine hip_invcol1(a_d, n) &
          bind(c, name='hip_invcol1')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d
       integer(c_int) :: n
     end subroutine hip_invcol1
  end interface
 
  interface
     subroutine hip_invcol2(a_d, b_d, n) &
          bind(c, name='hip_invcol2')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine hip_invcol2
  end interface
 
  interface
     subroutine hip_col2(a_d, b_d, n) &
          bind(c, name='hip_col2')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine hip_col2
  end interface
 
  interface
     subroutine hip_col3(a_d, b_d, c_d, n) &
          bind(c, name='hip_col3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine hip_col3
  end interface
 
  interface
     subroutine hip_subcol3(a_d, b_d, c_d, n) &
          bind(c, name='hip_subcol3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine hip_subcol3
  end interface
 
  interface
     subroutine hip_sub2(a_d, b_d, n) &
          bind(c, name='hip_sub2')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine hip_sub2
  end interface
 
  interface
     subroutine hip_sub3(a_d, b_d, c_d, n) &
          bind(c, name='hip_sub3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine hip_sub3
  end interface
 
  interface
     subroutine hip_add3(a_d, b_d, c_d, n) &
          bind(c, name='hip_add3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine hip_add3
  end interface
 
  interface
     subroutine hip_addcol3(a_d, b_d, c_d, n) &
          bind(c, name='hip_addcol3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine hip_addcol3
  end interface
 
  interface
     subroutine hip_addcol4(a_d, b_d, c_d, d_d, n) &
          bind(c, name='hip_addcol4')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d, d_d
       integer(c_int) :: n
     end subroutine hip_addcol4
  end interface
 
  interface
     subroutine hip_vdot3(dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d, n) &
          bind(c, name='hip_vdot3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d
       integer(c_int) :: n
     end subroutine hip_vdot3
  end interface
 
  interface
     real(c_rp) function hip_vlsc3(u_d, v_d, w_d, n) &
          bind(c, name='hip_vlsc3')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: u_d, v_d, w_d
       integer(c_int) :: n
     end function hip_vlsc3
  end interface
 
  interface
     real(c_rp) function hip_glsc3(a_d, b_d, c_d, n) &
          bind(c, name='hip_glsc3')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end function hip_glsc3
  end interface
 
  interface
     subroutine hip_glsc3_many(h,w_d,v_d_d,mult_d,j,n) &
          bind(c, name='hip_glsc3_many')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: w_d, v_d_d, mult_d
       integer(c_int) :: j, n
       real(c_rp) :: h(j)
     end subroutine hip_glsc3_many
  end interface
 
  interface
     real(c_rp) function hip_glsc2(a_d, b_d, n) &
          bind(c, name='hip_glsc2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end function hip_glsc2
  end interface
 
  interface
     real(c_rp) function hip_glsum(a_d, n) &
          bind(c, name='hip_glsum')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d
       integer(c_int) :: n
     end function hip_glsum
  end interface
#elif HAVE_CUDA
  interface
     subroutine cuda_copy(a_d, b_d, n) &
          bind(c, name='cuda_copy')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine cuda_copy
  end interface
 
  interface
     subroutine cuda_masked_copy(a_d, b_d, mask_d, n, m) &
          bind(c, name='cuda_masked_copy')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: a_d, b_d, mask_d
       integer(c_int) :: n, m
     end subroutine cuda_masked_copy
  end interface
 
  interface
     subroutine cuda_cfill_mask(a_d, c, size, mask_d, mask_size) &
          bind(c, name='cuda_cfill_mask')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: size
       type(c_ptr), value :: mask_d
       integer(c_int) :: mask_size
     end subroutine cuda_cfill_mask
  end interface
 
  interface
     subroutine cuda_cmult(a_d, c, n) &
          bind(c, name='cuda_cmult')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine cuda_cmult
  end interface
 
  interface
     subroutine cuda_cmult2(a_d, b_d, c, n) &
          bind(c, name='cuda_cmult2')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine cuda_cmult2
  end interface
 
  interface
     subroutine cuda_cadd(a_d, c, n) &
          bind(c, name='cuda_cadd')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine cuda_cadd
  end interface
 
  interface
     subroutine cuda_cadd2(a_d, b_d, c, n) &
          bind(c, name='cuda_cadd2')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       type(c_ptr), value :: b_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine cuda_cadd2
  end interface
 
  interface
     subroutine cuda_cfill(a_d, c, n) &
          bind(c, name='cuda_cfill')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine cuda_cfill
  end interface
 
  interface
     subroutine cuda_rzero(a_d, n) &
          bind(c, name='cuda_rzero')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: a_d
       integer(c_int) :: n
     end subroutine cuda_rzero
  end interface
 
  interface
     subroutine cuda_add2(a_d, b_d, n) &
          bind(c, name='cuda_add2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine cuda_add2
  end interface
 
  interface
     subroutine cuda_add2s1(a_d, b_d, c1, n) &
          bind(c, name='cuda_add2s1')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c1
       integer(c_int) :: n
     end subroutine cuda_add2s1
  end interface
 
  interface
     subroutine cuda_add2s2(a_d, b_d, c1, n) &
          bind(c, name='cuda_add2s2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c1
       integer(c_int) :: n
     end subroutine cuda_add2s2
  end interface
 
  interface
     subroutine cuda_addsqr2s2(a_d, b_d, c1, n) &
          bind(c, name='cuda_addsqr2s2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c1
       integer(c_int) :: n
     end subroutine cuda_addsqr2s2
  end interface
 
  interface
     subroutine cuda_add3s2(a_d, b_d, c_d, c1, c2, n) &
          bind(c, name='cuda_add3s2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       real(c_rp) :: c1, c2
       integer(c_int) :: n
     end subroutine cuda_add3s2
  end interface
 
  interface
     subroutine cuda_invcol1(a_d, n) &
          bind(c, name='cuda_invcol1')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d
       integer(c_int) :: n
     end subroutine cuda_invcol1
  end interface
 
  interface
     subroutine cuda_invcol2(a_d, b_d, n) &
          bind(c, name='cuda_invcol2')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine cuda_invcol2
  end interface
 
  interface
     subroutine cuda_col2(a_d, b_d, n) &
          bind(c, name='cuda_col2')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine cuda_col2
  end interface
 
  interface
     subroutine cuda_col3(a_d, b_d, c_d, n) &
          bind(c, name='cuda_col3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine cuda_col3
  end interface
 
  interface
     subroutine cuda_subcol3(a_d, b_d, c_d, n) &
          bind(c, name='cuda_subcol3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine cuda_subcol3
  end interface
 
  interface
     subroutine cuda_sub2(a_d, b_d, n) &
          bind(c, name='cuda_sub2')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine cuda_sub2
  end interface
 
  interface
     subroutine cuda_sub3(a_d, b_d, c_d, n) &
          bind(c, name='cuda_sub3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine cuda_sub3
  end interface
 
  interface
     subroutine cuda_add3(a_d, b_d, c_d, n) &
          bind(c, name='cuda_add3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine cuda_add3
  end interface
 
  interface
     subroutine cuda_addcol3(a_d, b_d, c_d, n) &
          bind(c, name='cuda_addcol3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine cuda_addcol3
  end interface
 
  interface
     subroutine cuda_addcol4(a_d, b_d, c_d, d_d, n) &
          bind(c, name='cuda_addcol4')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d, d_d
       integer(c_int) :: n
     end subroutine cuda_addcol4
  end interface
 
  interface
     subroutine cuda_vdot3(dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d, n) &
          bind(c, name='cuda_vdot3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d
       integer(c_int) :: n
     end subroutine cuda_vdot3
  end interface
 
  interface
     real(c_rp) function cuda_vlsc3(u_d, v_d, w_d, n) &
          bind(c, name='cuda_vlsc3')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: u_d, v_d, w_d
       integer(c_int) :: n
     end function cuda_vlsc3
  end interface
 
  interface
     subroutine cuda_add2s2_many(y_d,x_d_d,a_d,j,n) &
          bind(c, name='cuda_add2s2_many')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: y_d, x_d_d, a_d
       integer(c_int) :: j, n
     end subroutine cuda_add2s2_many
  end interface
 
  interface
     real(c_rp) function cuda_glsc3(a_d, b_d, c_d, n) &
          bind(c, name='cuda_glsc3')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end function cuda_glsc3
  end interface
 
  interface
     subroutine cuda_glsc3_many(h,w_d,v_d_d,mult_d,j,n) &
          bind(c, name='cuda_glsc3_many')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: w_d, v_d_d, mult_d
       integer(c_int) :: j, n
       real(c_rp) :: h(j)
     end subroutine cuda_glsc3_many
  end interface
 
  interface
     real(c_rp) function cuda_glsc2(a_d, b_d, n) &
          bind(c, name='cuda_glsc2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end function cuda_glsc2
  end interface
 
  interface
     real(c_rp) function cuda_glsum(a_d, n) &
          bind(c, name='cuda_glsum')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d
       integer(c_int) :: n
     end function cuda_glsum
  end interface
#elif HAVE_OPENCL
  interface
     subroutine opencl_copy(a_d, b_d, n) &
          bind(c, name='opencl_copy')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine opencl_copy
  end interface
 
  interface
     subroutine opencl_masked_copy(a_d, b_d, mask_d, n, m) &
          bind(c, name='opencl_masked_copy')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: a_d, b_d, mask_d
       integer(c_int) :: n, m
     end subroutine opencl_masked_copy
  end interface
 
  interface
     subroutine opencl_cfill_mask(a_d, c, size, mask_d, mask_size) &
          bind(c, name='opencl_cfill_mask')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: size
       type(c_ptr), value :: mask_d
       integer(c_int) :: mask_size
     end subroutine opencl_cfill_mask
  end interface
 
  interface
     subroutine opencl_cmult(a_d, c, n) &
          bind(c, name='opencl_cmult')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine opencl_cmult
  end interface
 
  interface
     subroutine opencl_cmult2(a_d, b_d, c, n) &
          bind(c, name='opencl_cmult2')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine opencl_cmult2
  end interface
 
  interface
     subroutine opencl_cadd(a_d, c, n) &
          bind(c, name='opencl_cadd')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine opencl_cadd
  end interface
 
  interface
     subroutine opencl_cadd2(a_d, b_d, c, n) &
          bind(c, name='opencl_cadd2')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       type(c_ptr), value :: b_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine opencl_cadd2
  end interface
 
  interface
     subroutine opencl_cfill(a_d, c, n) &
          bind(c, name='opencl_cfill')
       use, intrinsic :: iso_c_binding
       import c_rp
       type(c_ptr), value :: a_d
       real(c_rp) :: c
       integer(c_int) :: n
     end subroutine opencl_cfill
  end interface
 
  interface
     subroutine opencl_rzero(a_d, n) &
          bind(c, name='opencl_rzero')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: a_d
       integer(c_int) :: n
     end subroutine opencl_rzero
  end interface
 
  interface
     subroutine opencl_rone(a_d, n) &
          bind(c, name='opencl_rone')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: a_d
       integer(c_int) :: n
     end subroutine opencl_rone
  end interface
 
  interface
     subroutine opencl_add2(a_d, b_d, n) &
          bind(c, name='opencl_add2')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine opencl_add2
  end interface
 
  interface
     subroutine opencl_add2s1(a_d, b_d, c1, n) &
          bind(c, name='opencl_add2s1')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c1
       integer(c_int) :: n
     end subroutine opencl_add2s1
  end interface
 
  interface
     subroutine opencl_add2s2(a_d, b_d, c1, n) &
          bind(c, name='opencl_add2s2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c1
       integer(c_int) :: n
     end subroutine opencl_add2s2
  end interface
 
  interface
     subroutine opencl_add2s2_many(y_d,x_d_d,a_d,j,n) &
          bind(c, name='opencl_add2s2_many')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: y_d, x_d_d, a_d
       integer(c_int) :: j, n
     end subroutine opencl_add2s2_many
  end interface
 
  interface
     subroutine opencl_addsqr2s2(a_d, b_d, c1, n) &
          bind(c, name='opencl_addsqr2s2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       real(c_rp) :: c1
       integer(c_int) :: n
     end subroutine opencl_addsqr2s2
  end interface
 
  interface
     subroutine opencl_add3s2(a_d, b_d, c_d, c1, c2, n) &
          bind(c, name='opencl_add3s2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       real(c_rp) :: c1, c2
       integer(c_int) :: n
     end subroutine opencl_add3s2
  end interface
 
  interface
     subroutine opencl_invcol1(a_d, n) &
          bind(c, name='opencl_invcol1')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d
       integer(c_int) :: n
     end subroutine opencl_invcol1
  end interface
 
  interface
     subroutine opencl_invcol2(a_d, b_d, n) &
          bind(c, name='opencl_invcol2')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine opencl_invcol2
  end interface
 
  interface
     subroutine opencl_col2(a_d, b_d, n) &
          bind(c, name='opencl_col2')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine opencl_col2
  end interface
 
  interface
     subroutine opencl_col3(a_d, b_d, c_d, n) &
          bind(c, name='opencl_col3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine opencl_col3
  end interface
 
  interface
     subroutine opencl_subcol3(a_d, b_d, c_d, n) &
          bind(c, name='opencl_subcol3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine opencl_subcol3
  end interface
 
  interface
     subroutine opencl_sub2(a_d, b_d, n) &
          bind(c, name='opencl_sub2')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end subroutine opencl_sub2
  end interface
 
  interface
     subroutine opencl_sub3(a_d, b_d, c_d, n) &
          bind(c, name='opencl_sub3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine opencl_sub3
  end interface
 
  interface
     subroutine opencl_add3(a_d, b_d, c_d, n) &
          bind(c, name='opencl_add3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine opencl_add3
  end interface
 
  interface
     subroutine opencl_addcol3(a_d, b_d, c_d, n) &
          bind(c, name='opencl_addcol3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end subroutine opencl_addcol3
  end interface
 
  interface
     subroutine opencl_addcol4(a_d, b_d, c_d, d_d, n) &
          bind(c, name='opencl_addcol4')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d, d_d
       integer(c_int) :: n
     end subroutine opencl_addcol4
  end interface
 
  interface
     subroutine opencl_vdot3(dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d, n) &
          bind(c, name='opencl_vdot3')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d
       integer(c_int) :: n
     end subroutine opencl_vdot3
  end interface
 
  interface
     real(c_rp) function opencl_glsc3(a_d, b_d, c_d, n) &
          bind(c, name='opencl_glsc3')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d, c_d
       integer(c_int) :: n
     end function opencl_glsc3
  end interface
 
  interface
     subroutine opencl_glsc3_many(h, w_d, v_d_d, mult_d, j, n) &
          bind(c, name='opencl_glsc3_many')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       integer(c_int) :: j, n
       type(c_ptr), value :: w_d, v_d_d, mult_d
       real(c_rp) :: h(j)
     end subroutine opencl_glsc3_many
  end interface
 
  interface
     real(c_rp) function opencl_glsc2(a_d, b_d, n) &
          bind(c, name='opencl_glsc2')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d
       integer(c_int) :: n
     end function opencl_glsc2
  end interface
 
  interface
     real(c_rp) function opencl_glsum(a_d, n) &
          bind(c, name='opencl_glsum')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d
       integer(c_int) :: n
     end function opencl_glsum
  end interface
#endif
 
  public :: device_copy, device_rzero, device_rone, device_cmult, device_cmult2,&
       device_cadd, device_cfill, device_add2, device_add2s1, device_add2s2, &
       device_addsqr2s2, device_add3s2, device_invcol1, device_invcol2, &
       device_col2, device_col3, device_subcol3, device_sub2, device_sub3, &
       device_addcol3, device_addcol4, device_vdot3, device_vlsc3, device_glsc3, &
       device_glsc3_many, device_add2s2_many, device_glsc2, device_glsum, &
       device_masked_copy, device_cfill_mask, device_add3, device_cadd2
  
contains
 
  subroutine device_copy(a_d, b_d, n)
    type(c_ptr) :: a_d, b_d
    integer :: n
#ifdef HAVE_HIP
    call hip_copy(a_d, b_d, n)
#elif HAVE_CUDA
    call cuda_copy(a_d, b_d, n)
#elif HAVE_OPENCL
    call opencl_copy(a_d, b_d, n)
#else
    call neko_error('no device backend configured')
#endif
  end subroutine device_copy
 
  subroutine device_masked_copy(a_d, b_d, mask_d, n, m)
    type(c_ptr) :: a_d, b_d, mask_d
    integer :: n, m
#ifdef HAVE_HIP
    call hip_masked_copy(a_d, b_d, mask_d, n, m)
#elif HAVE_CUDA
    call cuda_masked_copy(a_d, b_d, mask_d, n, m)
#elif HAVE_OPENCL
    call opencl_masked_copy(a_d, b_d, mask_d, n, m)
#else
    call neko_error('no device backend configured')
#endif
  end subroutine device_masked_copy
 
  subroutine device_cfill_mask(a_d, c, size, mask_d, mask_size)
    type(c_ptr) :: a_d
    real(kind=rp), intent(in) :: c
    integer :: size
    type(c_ptr) :: mask_d
    integer :: mask_size
#ifdef HAVE_HIP
    call hip_cfill_mask(a_d, c, size, mask_d, mask_size)
#elif HAVE_CUDA
    call cuda_cfill_mask(a_d, c, size, mask_d, mask_size)
#elif HAVE_OPENCL
    call opencl_cfill_mask(a_d, c, size, mask_d, mask_size)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_cfill_mask
 
  subroutine device_rzero(a_d, n)
    type(c_ptr) :: a_d
    integer :: n
#ifdef HAVE_HIP
    call hip_rzero(a_d, n)
#elif HAVE_CUDA
    call cuda_rzero(a_d, n)
#elif HAVE_OPENCL
    call opencl_rzero(a_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_rzero
 
  subroutine device_rone(a_d, n)
    type(c_ptr) :: a_d
    integer :: n
    real(kind=rp) :: one = 1.0_rp
#if defined(HAVE_HIP) || defined(HAVE_CUDA) || defined(HAVE_OPENCL)
    call device_cfill(a_d, one, n)
#elif HAVE_OPENCL
    call opencl_rone(a_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_rone
 
  subroutine device_cmult(a_d, c, n)
    type(c_ptr) :: a_d
    real(kind=rp), intent(in) :: c
    integer :: n
#ifdef HAVE_HIP
    call hip_cmult(a_d, c, n)
#elif HAVE_CUDA
    call cuda_cmult(a_d, c, n)
#elif HAVE_OPENCL
    call opencl_cmult(a_d, c, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_cmult
 
  subroutine device_cmult2(a_d, b_d, c, n)
    type(c_ptr) :: a_d, b_d
    real(kind=rp), intent(in) :: c
    integer :: n
#ifdef HAVE_HIP
    call hip_cmult2(a_d, b_d, c, n)
#elif HAVE_CUDA
    call cuda_cmult2(a_d, b_d, c, n)
#elif HAVE_OPENCL
    call opencl_cmult2(a_d, b_d, c, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_cmult2
 
  subroutine device_cadd(a_d, c, n)
    type(c_ptr) :: a_d
    real(kind=rp), intent(in) :: c
    integer :: n
#ifdef HAVE_HIP
    call hip_cadd(a_d, c, n)
#elif HAVE_CUDA
    call cuda_cadd(a_d, c, n)
#elif HAVE_OPENCL
    call opencl_cadd(a_d, c, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_cadd
 
  subroutine device_cadd2(a_d, b_d, c, n)
    type(c_ptr) :: a_d
    type(c_ptr) :: b_d
    real(kind=rp), intent(in) :: c
    integer :: n
#ifdef HAVE_HIP
    call hip_cadd2(a_d, b_d, c, n)
#elif HAVE_CUDA
    call cuda_cadd2(a_d, b_d, c, n)
#elif HAVE_OPENCL
    call opencl_cadd2(a_d, b_d, c, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_cadd2
 
  subroutine device_cfill(a_d, c, n)
    type(c_ptr) :: a_d
    real(kind=rp), intent(in) :: c
    integer :: n
#ifdef HAVE_HIP
    call hip_cfill(a_d, c, n)
#elif HAVE_CUDA
    call cuda_cfill(a_d, c, n)
#elif HAVE_OPENCL
    call opencl_cfill(a_d, c, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_cfill
 
  subroutine device_add2(a_d, b_d, n)
    type(c_ptr) :: a_d, b_d
    integer :: n
#ifdef HAVE_HIP
    call hip_add2(a_d, b_d, n)
#elif HAVE_CUDA
    call cuda_add2(a_d, b_d, n)
#elif HAVE_OPENCL
    call opencl_add2(a_d, b_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_add2
 
  subroutine device_add2s1(a_d, b_d, c1, n)
    type(c_ptr) :: a_d, b_d
    real(kind=rp) :: c1
    integer :: n
#ifdef HAVE_HIP
    call hip_add2s1(a_d, b_d, c1, n)
#elif HAVE_CUDA
    call cuda_add2s1(a_d, b_d, c1, n)
#elif HAVE_OPENCL
    call opencl_add2s1(a_d, b_d, c1, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_add2s1
 
  subroutine device_add2s2(a_d, b_d, c1, n)
    type(c_ptr) :: a_d, b_d
    real(kind=rp) :: c1
    integer :: n
#ifdef HAVE_HIP
    call hip_add2s2(a_d, b_d, c1, n)
#elif HAVE_CUDA
    call cuda_add2s2(a_d, b_d, c1, n)
#elif HAVE_OPENCL
    call opencl_add2s2(a_d, b_d, c1, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_add2s2
 
  subroutine device_addsqr2s2(a_d, b_d, c1, n)
    type(c_ptr) :: a_d, b_d
    real(kind=rp) :: c1
    integer :: n
#ifdef HAVE_HIP
    call hip_addsqr2s2(a_d, b_d, c1, n)
#elif HAVE_CUDA
    call cuda_addsqr2s2(a_d, b_d, c1, n)
#elif HAVE_OPENCL
    call opencl_addsqr2s2(a_d, b_d, c1, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_addsqr2s2
 
  subroutine device_add3(a_d, b_d, c_d, n)
    type(c_ptr) :: a_d, b_d, c_d
    integer :: n
#ifdef HAVE_HIP
    call hip_add3(a_d, b_d, c_d, n)
#elif HAVE_CUDA
    call cuda_add3(a_d, b_d, c_d, n)
#elif HAVE_OPENCL
    call opencl_add3(a_d, b_d, c_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_add3
 
  subroutine device_add3s2(a_d, b_d, c_d, c1, c2 ,n)
    type(c_ptr) :: a_d, b_d, c_d
    real(kind=rp) :: c1, c2
    integer :: n
#ifdef HAVE_HIP
    call hip_add3s2(a_d, b_d, c_d, c1, c2, n)
#elif HAVE_CUDA
    call cuda_add3s2(a_d, b_d, c_d, c1, c2, n)
#elif HAVE_OPENCL
    call opencl_add3s2(a_d, b_d, c_d, c1, c2, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_add3s2
 
  subroutine device_invcol1(a_d, n)
    type(c_ptr) :: a_d
    integer :: n
#ifdef HAVE_HIP
    call hip_invcol1(a_d, n)
#elif HAVE_CUDA
    call cuda_invcol1(a_d, n)
#elif HAVE_OPENCL
    call opencl_invcol1(a_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_invcol1
 
  subroutine device_invcol2(a_d, b_d, n)
    type(c_ptr) :: a_d, b_d
    integer :: n
#ifdef HAVE_HIP
    call hip_invcol2(a_d, b_d, n)
#elif HAVE_CUDA
    call cuda_invcol2(a_d, b_d, n)
#elif HAVE_OPENCL
    call opencl_invcol2(a_d, b_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_invcol2
 
  subroutine device_col2(a_d, b_d, n)
    type(c_ptr) :: a_d, b_d
    integer :: n
#ifdef HAVE_HIP
    call hip_col2(a_d, b_d, n)
#elif HAVE_CUDA
    call cuda_col2(a_d, b_d, n)
#elif HAVE_OPENCL
    call opencl_col2(a_d, b_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_col2
 
  subroutine device_col3(a_d, b_d, c_d, n)
    type(c_ptr) :: a_d, b_d, c_d
    integer :: n
#ifdef HAVE_HIP
    call hip_col3(a_d, b_d, c_d, n)
#elif HAVE_CUDA
    call cuda_col3(a_d, b_d, c_d, n)
#elif HAVE_OPENCL
    call opencl_col3(a_d, b_d, c_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_col3
 
  subroutine device_subcol3(a_d, b_d, c_d, n)
    type(c_ptr) :: a_d, b_d, c_d
    integer :: n
#ifdef HAVE_HIP
    call hip_subcol3(a_d, b_d, c_d, n)
#elif HAVE_CUDA
    call cuda_subcol3(a_d, b_d, c_d, n)
#elif HAVE_OPENCL
    call opencl_subcol3(a_d, b_d, c_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_subcol3
 
  subroutine device_sub2(a_d, b_d, n)
    type(c_ptr) :: a_d, b_d
    integer :: n
#ifdef HAVE_HIP
    call hip_sub2(a_d, b_d, n)
#elif HAVE_CUDA
    call cuda_sub2(a_d, b_d, n)
#elif HAVE_OPENCL
    call opencl_sub2(a_d, b_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_sub2
 
  subroutine device_sub3(a_d, b_d, c_d, n)
    type(c_ptr) :: a_d, b_d, c_d
    integer :: n
#ifdef HAVE_HIP
    call hip_sub3(a_d, b_d, c_d, n)
#elif HAVE_CUDA
    call cuda_sub3(a_d, b_d, c_d, n)
#elif HAVE_OPENCL
    call opencl_sub3(a_d, b_d, c_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_sub3
 
  subroutine device_addcol3(a_d, b_d, c_d, n)
    type(c_ptr) :: a_d, b_d, c_d
    integer :: n
#ifdef HAVE_HIP
    call hip_addcol3(a_d, b_d, c_d, n)
#elif HAVE_CUDA
    call cuda_addcol3(a_d, b_d, c_d, n)
#elif HAVE_OPENCL
    call opencl_addcol3(a_d, b_d, c_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_addcol3
 
  subroutine device_addcol4(a_d, b_d, c_d, d_d, n)
    type(c_ptr) :: a_d, b_d, c_d, d_d
    integer :: n
#ifdef HAVE_HIP
    call hip_addcol4(a_d, b_d, c_d, d_d, n)
#elif HAVE_CUDA
    call cuda_addcol4(a_d, b_d, c_d, d_d, n)
#elif HAVE_OPENCL
    call opencl_addcol4(a_d, b_d, c_d, d_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_addcol4
 
  subroutine device_vdot3(dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d, n)
    type(c_ptr) :: dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d
    integer :: n
#ifdef HAVE_HIP
    call hip_vdot3(dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d, n)
#elif HAVE_CUDA
    call cuda_vdot3(dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d, n)
#elif HAVE_OPENCL
    call opencl_vdot3(dot_d, u1_d, u2_d, u3_d, v1_d, v2_d, v3_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_vdot3
 
  function device_vlsc3(u_d, v_d, w_d, n) result(res)
    type(c_ptr) :: u_d, v_d, w_d
    integer :: n
    real(kind=rp) :: res
    res = 0.0_rp
#ifdef HAVE_HIP
    res = hip_vlsc3(u_d, v_d, w_d, n)
#elif HAVE_CUDA
    res = cuda_vlsc3(u_d, v_d, w_d, n)
#elif HAVE_OPENCL
    ! Same kernel as glsc3 (currently no device MPI for OpenCL)
    res = opencl_glsc3(u_d, v_d, w_d, n)
#else
    call neko_error('No device backend configured')
#endif
  end function device_vlsc3
 
  function device_glsc3(a_d, b_d, c_d, n) result(res)
    type(c_ptr) :: a_d, b_d, c_d
    integer :: n, ierr
    real(kind=rp) :: res
#ifdef HAVE_HIP
    res = hip_glsc3(a_d, b_d, c_d, n)
#elif HAVE_CUDA
    res = cuda_glsc3(a_d, b_d, c_d, n)
#elif HAVE_OPENCL
    res = opencl_glsc3(a_d, b_d, c_d, n)
#else
    call neko_error('No device backend configured')
#endif
 
#ifndef HAVE_DEVICE_MPI
    if (pe_size .gt. 1) then
       call mpi_allreduce(mpi_in_place, res, 1, &
            mpi_real_precision, mpi_sum, neko_comm, ierr)
    end if
#endif
  end function device_glsc3
 
  subroutine device_glsc3_many(h,w_d,v_d_d,mult_d,j,n)
    type(c_ptr), value :: w_d, v_d_d, mult_d
    integer(c_int) :: j, n
    real(c_rp) :: h(j)
    integer :: ierr
#ifdef HAVE_HIP
    call hip_glsc3_many(h,w_d,v_d_d,mult_d,j,n)
#elif HAVE_CUDA
    call cuda_glsc3_many(h,w_d,v_d_d,mult_d,j,n)
#elif HAVE_OPENCL
    call opencl_glsc3_many(h,w_d,v_d_d,mult_d,j,n)
#else
    call neko_error('No device backend configured')
#endif
 
#ifndef HAVE_DEVICE_MPI
    if (pe_size .gt. 1) then
       call mpi_allreduce(mpi_in_place, h, j, &
            mpi_real_precision, mpi_sum, neko_comm, ierr)
    end if
#endif
  end subroutine device_glsc3_many
 
  subroutine device_add2s2_many(y_d,x_d_d,a_d,j,n)
    type(c_ptr), value :: y_d, x_d_d, a_d
    integer(c_int) :: j, n
#ifdef HAVE_HIP
    call hip_add2s2_many(y_d,x_d_d,a_d,j,n)
#elif HAVE_CUDA
    call cuda_add2s2_many(y_d,x_d_d,a_d,j,n)
#elif HAVE_OPENCL
    call opencl_add2s2_many(y_d,x_d_d,a_d,j,n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_add2s2_many
 
  function device_glsc2(a_d, b_d, n) result(res)
    type(c_ptr) :: a_d, b_d
    integer :: n, ierr
    real(kind=rp) :: res
#ifdef HAVE_HIP
    res = hip_glsc2(a_d, b_d, n)
#elif HAVE_CUDA
    res = cuda_glsc2(a_d, b_d, n)
#elif HAVE_OPENCL
    res = opencl_glsc2(a_d, b_d, n)
#else
    call neko_error('No device backend configured')
#endif
 
#ifndef HAVE_DEVICE_MPI
    if (pe_size .gt. 1) then
       call mpi_allreduce(mpi_in_place, res, 1, &
            mpi_real_precision, mpi_sum, neko_comm, ierr)
    end if
#endif
  end function device_glsc2
 
  function device_glsum(a_d, n) result(res)
    type(c_ptr) :: a_d
    integer :: n, ierr
    real(kind=rp) :: res
#ifdef HAVE_HIP
    res = hip_glsum(a_d, n)
#elif HAVE_CUDA
    res = cuda_glsum(a_d, n)
#elif HAVE_OPENCL
    res = opencl_glsum(a_d, n)
#else
    call neko_error('No device backend configured')
#endif
 
#ifndef HAVE_DEVICE_MPI
    if (pe_size .gt. 1) then
       call mpi_allreduce(mpi_in_place, res, 1, &
            mpi_real_precision, mpi_sum, neko_comm, ierr)
    end if
#endif
  end function device_glsum
 
 
end module device_math