!                Parallel Sparse BLAS   GPU plugin 
!      (C) Copyright 2013
!  
!                         Salvatore Filippone
!                         Alessandro Fanfarillo
!   
!    Redistribution and use in source and binary forms, with or without
!    modification, are permitted provided that the following conditions
!    are met:
!      1. Redistributions of source code must retain the above copyright
!         notice, this list of conditions and the following disclaimer.
!      2. Redistributions in binary form must reproduce the above copyright
!         notice, this list of conditions, and the following disclaimer in the
!         documentation and/or other materials provided with the distribution.
!      3. The name of the PSBLAS group or the names of its contributors may
!         not be used to endorse or promote products derived from this
!         software without specific written permission.
!   
!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
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!   
  

module elldev_mod
  use iso_c_binding 
  use core_mod 
  
  type, bind(c) :: elldev_parms
    integer(c_int) :: element_type
    integer(c_int) :: pitch
    integer(c_int) :: rows
    integer(c_int) :: columns
    integer(c_int) :: maxRowSize
    integer(c_int) :: avgRowSize
    integer(c_int) :: firstIndex
  end type elldev_parms

  interface 
    function FgetEllDeviceParams(rows, maxRowSize, nnzeros, columns, elementType, firstIndex) &
         & result(res) bind(c,name='getEllDeviceParams')
      use iso_c_binding
      import :: elldev_parms
      type(elldev_parms)    :: res
      integer(c_int), value :: rows,maxRowSize,nnzeros,columns,elementType,firstIndex
    end function FgetEllDeviceParams
  end interface


  interface 
    function FallocEllDevice(deviceMat,rows,maxRowSize,nnzeros,columns,&
         & elementType,firstIndex) &
         & result(res) bind(c,name='FallocEllDevice')
      use iso_c_binding
      integer(c_int)        :: res
      integer(c_int), value :: rows,maxRowSize,nnzeros,columns,elementType,firstIndex
      type(c_ptr)           :: deviceMat
    end function FallocEllDevice
  end interface


  interface writeEllDevice

    function writeEllDeviceFloat(deviceMat,val,ja,ldj,irn,idiag) &
         & result(res) bind(c,name='writeEllDeviceFloat')
      use iso_c_binding
      integer(c_int)      :: res
      type(c_ptr), value  :: deviceMat
      integer(c_int), value :: ldj
      real(c_float)       :: val(ldj,*)
      integer(c_int)      :: ja(ldj,*),irn(*),idiag(*)
    end function writeEllDeviceFloat

    function writeEllDeviceDouble(deviceMat,val,ja,ldj,irn,idiag) &
         & result(res) bind(c,name='writeEllDeviceDouble')
      use iso_c_binding
      integer(c_int)      :: res
      type(c_ptr), value  :: deviceMat
      integer(c_int), value :: ldj
      real(c_double)      :: val(ldj,*)
      integer(c_int)      :: ja(ldj,*),irn(*),idiag(*)
    end function writeEllDeviceDouble

    function writeEllDeviceFloatComplex(deviceMat,val,ja,ldj,irn,idiag) &
         & result(res) bind(c,name='writeEllDeviceFloatComplex')
      use iso_c_binding
      integer(c_int)           :: res
      type(c_ptr), value       :: deviceMat
      integer(c_int), value    :: ldj
      complex(c_float_complex) :: val(ldj,*)
      integer(c_int)           :: ja(ldj,*),irn(*),idiag(*)
    end function writeEllDeviceFloatComplex

    function writeEllDeviceDoubleComplex(deviceMat,val,ja,ldj,irn,idiag) &
         & result(res) bind(c,name='writeEllDeviceDoubleComplex')
      use iso_c_binding
      integer(c_int)            :: res
      type(c_ptr), value        :: deviceMat
      integer(c_int), value     :: ldj
      complex(c_double_complex) :: val(ldj,*)
      integer(c_int)            :: ja(ldj,*),irn(*),idiag(*)
    end function writeEllDeviceDoubleComplex

  end interface

  interface readEllDevice 

    function readEllDeviceFloat(deviceMat,val,ja,ldj,irn,idiag) &
         & result(res) bind(c,name='readEllDeviceFloat')
      use iso_c_binding
      integer(c_int)      :: res
      type(c_ptr), value  :: deviceMat
      integer(c_int), value :: ldj
      real(c_float)       :: val(ldj,*)
      integer(c_int)      :: ja(ldj,*),irn(*),idiag(*)
    end function readEllDeviceFloat

    function readEllDeviceDouble(deviceMat,val,ja,ldj,irn,idiag) &
         & result(res) bind(c,name='readEllDeviceDouble')
      use iso_c_binding
      integer(c_int)      :: res
      type(c_ptr), value  :: deviceMat
      integer(c_int), value :: ldj
      real(c_double)      :: val(ldj,*)
      integer(c_int)      :: ja(ldj,*),irn(*),idiag(*)
    end function readEllDeviceDouble

    function readEllDeviceFloatComplex(deviceMat,val,ja,ldj,irn,idiag) &
         & result(res) bind(c,name='readEllDeviceFloatComplex')
      use iso_c_binding
      integer(c_int)           :: res
      type(c_ptr), value       :: deviceMat
      integer(c_int), value    :: ldj
      complex(c_float_complex) :: val(ldj,*)
      integer(c_int)           :: ja(ldj,*),irn(*),idiag(*)
    end function readEllDeviceFloatComplex

    function readEllDeviceDoubleComplex(deviceMat,val,ja,ldj,irn,idiag) &
         & result(res) bind(c,name='readEllDeviceDoubleComplex')
      use iso_c_binding
      integer(c_int)           :: res
      type(c_ptr), value       :: deviceMat
      integer(c_int), value    :: ldj
      complex(c_double_complex) :: val(ldj,*)
      integer(c_int)           :: ja(ldj,*),irn(*),idiag(*)
    end function readEllDeviceDoubleComplex

  end interface

  interface 
    subroutine  freeEllDevice(deviceMat) &
         & bind(c,name='freeEllDevice')
      use iso_c_binding
      type(c_ptr), value  :: deviceMat
    end subroutine freeEllDevice
  end interface

  interface 
    subroutine  zeroEllDevice(deviceMat) &
         & bind(c,name='zeroEllDevice')
      use iso_c_binding
      type(c_ptr), value  :: deviceMat
    end subroutine zeroEllDevice
  end interface

  interface 
    subroutine resetEllTimer() bind(c,name='resetEllTimer')
      use iso_c_binding
    end subroutine resetEllTimer
  end interface
  interface 
    function  getEllTimer() &
         & bind(c,name='getEllTimer') result(res)
      use iso_c_binding
      real(c_double)      :: res
    end function getEllTimer
  end interface


  interface 
    function  getEllDevicePitch(deviceMat) &
         & bind(c,name='getEllDevicePitch') result(res)
      use iso_c_binding
      type(c_ptr), value  :: deviceMat
      integer(c_int)      :: res
    end function getEllDevicePitch
  end interface

  interface 
    function  getEllDeviceMaxRowSize(deviceMat) &
         & bind(c,name='getEllDeviceMaxRowSize') result(res)
      use iso_c_binding
      type(c_ptr), value  :: deviceMat
      integer(c_int)      :: res
    end function getEllDeviceMaxRowSize
  end interface


  interface psi_CopyCooToElg
    function psiCopyCooToElgFloat(nr, nc, nza, hacksz, ldv, nzm, irn, &
         &  idisp, ja, val, deviceMat) &
         & result(res) bind(c,name='psiCopyCooToElgFloat')
      use iso_c_binding
      integer(c_int)	    :: res
      integer(c_int), value  :: nr,nc,nza,hacksz,ldv,nzm
      type(c_ptr), value     :: deviceMat
      real(c_float)          :: val(*)
      integer(c_int)	    :: irn(*),idisp(*),ja(*)
    end function psiCopyCooToElgFloat
    function psiCopyCooToElgDouble(nr, nc, nza, hacksz, ldv, nzm, irn, &
         &  idisp, ja, val, deviceMat) &
         & result(res) bind(c,name='psiCopyCooToElgDouble')
      use iso_c_binding
      integer(c_int)	     :: res
      integer(c_int), value   :: nr,nc,nza,hacksz,ldv,nzm
      type(c_ptr), value      :: deviceMat
      real(c_double)          :: val(*)
      integer(c_int)	     :: irn(*),idisp(*),ja(*)
    end function psiCopyCooToElgDouble
    function psiCopyCooToElgFloatComplex(nr, nc, nza, hacksz, ldv, nzm, irn, &
         &  idisp, ja, val, deviceMat) &
         & result(res) bind(c,name='psiCopyCooToElgFloatComplex')
      use iso_c_binding
      integer(c_int)	      :: res
      integer(c_int), value    :: nr,nc,nza,hacksz,ldv,nzm
      type(c_ptr), value       :: deviceMat
      complex(c_float_complex) :: val(*)
      integer(c_int)	      :: irn(*),idisp(*),ja(*)
    end function psiCopyCooToElgFloatComplex
    function psiCopyCooToElgDoubleComplex(nr, nc, nza, hacksz, ldv, nzm, irn, &
         &  idisp, ja, val, deviceMat) &
         & result(res) bind(c,name='psiCopyCooToElgDoubleComplex')
      use iso_c_binding
      integer(c_int)	       :: res
      integer(c_int), value     :: nr,nc,nza,hacksz,ldv,nzm
      type(c_ptr), value        :: deviceMat
      complex(c_double_complex) :: val(*)
      integer(c_int)	       :: irn(*),idisp(*),ja(*)
    end function psiCopyCooToElgDoubleComplex
  end interface

  interface csputEllDeviceFloat
    function dev_csputEllDeviceFloat(deviceMat, nnz, ia, ja, val) &
         & result(res) bind(c,name='dev_csputEllDeviceFloat')
      use iso_c_binding
      integer(c_int)		:: res
      type(c_ptr), value 	:: deviceMat , ia, ja, val
      integer(c_int), value     :: nnz 
    end function dev_csputEllDeviceFloat
  end interface

  interface csputEllDeviceDouble
    function dev_csputEllDeviceDouble(deviceMat, nnz, ia, ja, val) &
         & result(res) bind(c,name='dev_csputEllDeviceDouble')
      use iso_c_binding
      integer(c_int)		:: res
      type(c_ptr), value 	:: deviceMat , ia, ja, val
      integer(c_int), value     :: nnz 
    end function dev_csputEllDeviceDouble
  end interface

  interface csputEllDeviceFloatComplex
    function dev_csputEllDeviceFloatComplex(deviceMat, nnz, ia, ja, val) &
         & result(res) bind(c,name='dev_csputEllDeviceFloatComplex')
      use iso_c_binding
      integer(c_int)		:: res
      type(c_ptr), value 	:: deviceMat , ia, ja, val
      integer(c_int), value     :: nnz 
    end function dev_csputEllDeviceFloatComplex
  end interface

  interface csputEllDeviceDoubleComplex
    function dev_csputEllDeviceDoubleComplex(deviceMat, nnz, ia, ja, val) &
         & result(res) bind(c,name='dev_csputEllDeviceDoubleComplex')
      use iso_c_binding
      integer(c_int)		:: res
      type(c_ptr), value 	:: deviceMat , ia, ja, val
      integer(c_int), value     :: nnz 
    end function dev_csputEllDeviceDoubleComplex
  end interface

  interface spmvEllDevice
    function spmvEllDeviceFloat(deviceMat,alpha,x,beta,y) &
         & result(res) bind(c,name='spmvEllDeviceFloat')
      use iso_c_binding
      integer(c_int)		:: res
      type(c_ptr), value 	:: deviceMat, x, y
      real(c_float),value     	:: alpha, beta
    end function spmvEllDeviceFloat
    function spmvEllDeviceDouble(deviceMat,alpha,x,beta,y) &
         & result(res) bind(c,name='spmvEllDeviceDouble')
      use iso_c_binding
      integer(c_int)		:: res
      type(c_ptr), value	:: deviceMat, x, y 
      real(c_double),value     	:: alpha,  beta
    end function spmvEllDeviceDouble
    function spmvEllDeviceFloatComplex(deviceMat,alpha,x,beta,y) &
         & result(res) bind(c,name='spmvEllDeviceFloatComplex')
      use iso_c_binding
      integer(c_int)		     :: res
      type(c_ptr), value	     :: deviceMat, x, y 
      complex(c_float_complex),value :: alpha,  beta
    end function spmvEllDeviceFloatComplex
    function spmvEllDeviceDoubleComplex(deviceMat,alpha,x,beta,y) &
         & result(res) bind(c,name='spmvEllDeviceDoubleComplex')
      use iso_c_binding
      integer(c_int)		      :: res
      type(c_ptr), value	      :: deviceMat, x, y 
      complex(c_double_complex),value :: alpha,  beta
    end function spmvEllDeviceDoubleComplex
  end interface

end module elldev_mod