psblas3/base/serial/psi_serial_impl.f90

!!$ 
!!$              Parallel Sparse BLAS  version 3.4
!!$    (C) Copyright 2006, 2010, 2015
!!$                       Salvatore Filippone    University of Rome Tor Vergata
!!$                       Alfredo Buttari        CNRS-IRIT, Toulouse
!!$ 
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!!$  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
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!!$  
!
! Gather/scatter routines for implementing halo/ovrl communication. 
!
!  
!
! Gather: Y = beta * Y + alpha * X(IDX(:))
!
!
! Scatter: 
! Y(IDX(:)) = beta*Y(IDX(:)) + X(:)
!
subroutine psi_igthv(n,idx,alpha,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  integer(psb_ipk_) :: x(:), y(:), alpha, beta

  ! Locals
  integer(psb_ipk_) :: i
  if (beta == izero) then 
    if (alpha == izero) then 
      do i=1,n
        y(i) = izero
      end do
    else if (alpha == ione) then 
      do i=1,n
        y(i) = x(idx(i))
      end do
    else if (alpha == -ione) then 
      do i=1,n
        y(i) = -x(idx(i))
      end do
    else  
      do i=1,n
        y(i) = alpha*x(idx(i))
      end do
    end if
  else 
    if (beta == ione) then 
      ! Do nothing
    else if (beta == -ione) then 
      y(1:n) = -y(1:n) 
    else
      y(1:n) = beta*y(1:n) 
    end if

    if (alpha == izero) then 
      ! do nothing
    else if (alpha == ione) then 
      do i=1,n
        y(i) = y(i) + x(idx(i))
      end do
    else if (alpha == -ione) then 
      do i=1,n
        y(i) = y(i) - x(idx(i))
      end do
    else  
      do i=1,n
        y(i) = y(i) + alpha*x(idx(i))
      end do
    end if
  end if

end subroutine psi_igthv

subroutine psi_sgthv(n,idx,alpha,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  real(psb_spk_) :: x(:), y(:), alpha, beta

  ! Locals
  integer(psb_ipk_) :: i
  if (beta == szero) then 
    if (alpha == szero) then 
      do i=1,n
        y(i) = szero
      end do
    else if (alpha == sone) then 
      do i=1,n
        y(i) = x(idx(i))
      end do
    else if (alpha == -sone) then 
      do i=1,n
        y(i) = -x(idx(i))
      end do
    else 
      do i=1,n
        y(i) = alpha*x(idx(i))
      end do
    end if
  else 
    if (beta == sone) then 
      ! Do nothing
    else if (beta == -sone) then 
      y(1:n) = -y(1:n) 
    else
      y(1:n) = beta*y(1:n) 
    end if

    if (alpha == szero) then 
      ! do nothing
    else if (alpha == sone) then 
      do i=1,n
        y(i) = y(i) + x(idx(i))
      end do
    else if (alpha == -sone) then 
      do i=1,n
        y(i) = y(i) - x(idx(i))
      end do
    else  
      do i=1,n
        y(i) = y(i) + alpha*x(idx(i))
      end do
    end if
  end if

end subroutine psi_sgthv

subroutine psi_dgthv(n,idx,alpha,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  real(psb_dpk_) :: x(:), y(:), alpha, beta

  ! Locals
  integer(psb_ipk_) :: i
  if (beta == dzero) then 
    if (alpha == dzero) then 
      do i=1,n
        y(i) = dzero
      end do
    else if (alpha == done) then 
      do i=1,n
        y(i) = x(idx(i))
      end do
    else if (alpha == -done) then 
      do i=1,n
        y(i) = -x(idx(i))
      end do
    else 
      do i=1,n
        y(i) = alpha*x(idx(i))
      end do
    end if
  else 
    if (beta == done) then 
      ! Do nothing
    else if (beta == -done) then 
      y(1:n) = -y(1:n) 
    else
      y(1:n) = beta*y(1:n) 
    end if

    if (alpha == dzero) then 
      ! do nothing
    else if (alpha == done) then 
      do i=1,n
        y(i) = y(i) + x(idx(i))
      end do
    else if (alpha == -done) then 
      do i=1,n
        y(i) = y(i) - x(idx(i))
      end do
    else  
      do i=1,n
        y(i) = y(i) + alpha*x(idx(i))
      end do
    end if
  end if

end subroutine psi_dgthv

subroutine psi_cgthv(n,idx,alpha,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  complex(psb_spk_) :: x(:), y(:),alpha,beta

  ! Locals
  integer(psb_ipk_) :: i
  if (beta == czero) then 
    if (alpha == czero) then 
      do i=1,n
        y(i) = czero
      end do
    else if (alpha == cone) then 
      do i=1,n
        y(i) = x(idx(i))
      end do
    else if (alpha == -cone) then 
      do i=1,n
        y(i) = -x(idx(i))
      end do
    else  
      do i=1,n
        y(i) = alpha*x(idx(i))
      end do
    end if
  else 
    if (beta == cone) then 
      ! Do nothing
    else if (beta == -cone) then 
      y(1:n) = -y(1:n) 
    else
      y(1:n) = beta*y(1:n) 
    end if

    if (alpha == czero) then 
      ! do nothing
    else if (alpha == cone) then 
      do i=1,n
        y(i) = y(i) + x(idx(i))
      end do
    else if (alpha == -cone) then 
      do i=1,n
        y(i) = y(i) - x(idx(i))
      end do
    else  
      do i=1,n
        y(i) = y(i) + alpha*x(idx(i))
      end do
    end if
  end if

end subroutine psi_cgthv

subroutine psi_zgthv(n,idx,alpha,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  complex(psb_dpk_) :: x(:), y(:),alpha,beta

  ! Locals
  integer(psb_ipk_) :: i
  if (beta == zzero) then 
    if (alpha == zzero) then 
      do i=1,n
        y(i) = zzero
      end do
    else if (alpha == zone) then 
      do i=1,n
        y(i) = x(idx(i))
      end do
    else if (alpha == -zone) then 
      do i=1,n
        y(i) = -x(idx(i))
      end do
    else  
      do i=1,n
        y(i) = alpha*x(idx(i))
      end do
    end if
  else 
    if (beta == zone) then 
      ! Do nothing
    else if (beta == -zone) then 
      y(1:n) = -y(1:n) 
    else
      y(1:n) = beta*y(1:n) 
    end if

    if (alpha == zzero) then 
      ! do nothing
    else if (alpha == zone) then 
      do i=1,n
        y(i) = y(i) + x(idx(i))
      end do
    else if (alpha == -zone) then 
      do i=1,n
        y(i) = y(i) - x(idx(i))
      end do
    else  
      do i=1,n
        y(i) = y(i) + alpha*x(idx(i))
      end do
    end if
  end if

end subroutine psi_zgthv



subroutine psi_sgthzmv(n,k,idx,x,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, k, idx(:)
  real(psb_spk_) :: x(:,:), y(:)

  ! Locals
  integer(psb_ipk_) :: i, j, pt

  pt=0
  do j=1,k
    do i=1,n
      pt=pt+1
      y(pt)=x(idx(i),j)
    end do
  end do

end subroutine psi_sgthzmv

subroutine psi_dgthzmv(n,k,idx,x,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, k, idx(:)
  real(psb_dpk_) :: x(:,:), y(:)

  ! Locals
  integer(psb_ipk_) :: i, j, pt

  pt=0
  do j=1,k
    do i=1,n
      pt=pt+1
      y(pt)=x(idx(i),j)
    end do
  end do

end subroutine psi_dgthzmv


subroutine psi_igthzmv(n,k,idx,x,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, k, idx(:)
  integer(psb_ipk_) :: x(:,:), y(:)

  ! Locals
  integer(psb_ipk_) :: i, j, pt

  pt=0
  do j=1,k
    do i=1,n
      pt=pt+1
      y(pt)=x(idx(i),j)
    end do
  end do

end subroutine psi_igthzmv


subroutine psi_cgthzmv(n,k,idx,x,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, k, idx(:)
  complex(psb_spk_) :: x(:,:), y(:)

  ! Locals
  integer(psb_ipk_) :: i, j, pt

  pt=0
  do j=1,k
    do i=1,n
      pt=pt+1
      y(pt)=x(idx(i),j)
    end do
  end do

end subroutine psi_cgthzmv

subroutine psi_zgthzmv(n,k,idx,x,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, k, idx(:)
  complex(psb_dpk_) :: x(:,:), y(:)

  ! Locals
  integer(psb_ipk_) :: i, j, pt

  pt=0
  do j=1,k
    do i=1,n
      pt=pt+1
      y(pt)=x(idx(i),j)
    end do
  end do

end subroutine psi_zgthzmv

subroutine psi_sgthzv(n,idx,x,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  real(psb_spk_) :: x(:), y(:)

  ! Locals
  integer(psb_ipk_) :: i

  do i=1,n
    y(i)=x(idx(i))
  end do

end subroutine psi_sgthzv

subroutine psi_dgthzv(n,idx,x,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  real(psb_dpk_) :: x(:), y(:)

  ! Locals
  integer(psb_ipk_) :: i

  do i=1,n
    y(i)=x(idx(i))
  end do

end subroutine psi_dgthzv

subroutine psi_igthzv(n,idx,x,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  integer(psb_ipk_) :: x(:), y(:)

  ! Locals
  integer(psb_ipk_) :: i

  do i=1,n
    y(i)=x(idx(i))
  end do

end subroutine psi_igthzv

subroutine psi_cgthzv(n,idx,x,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  complex(psb_spk_) :: x(:), y(:)

  ! Locals
  integer(psb_ipk_) :: i

  do i=1,n
    y(i)=x(idx(i))
  end do

end subroutine psi_cgthzv

subroutine psi_zgthzv(n,idx,x,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  complex(psb_dpk_) :: x(:), y(:)

  ! Locals
  integer(psb_ipk_) :: i

  do i=1,n
    y(i)=x(idx(i))
  end do

end subroutine psi_zgthzv


subroutine psi_ssctmv(n,k,idx,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, k, idx(:)
  real(psb_spk_) :: beta, x(:), y(:,:)

  ! Locals
  integer(psb_ipk_) :: i, j, pt

  if (beta == szero) then
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = x(pt)
      end do
    end do
  else if (beta == sone) then
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = y(idx(i),j)+x(pt)
      end do
    end do
  else
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = beta*y(idx(i),j)+x(pt)
      end do
    end do
  end if
end subroutine psi_ssctmv

subroutine psi_ssctv(n,idx,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  real(psb_spk_) :: beta, x(:), y(:)

  ! Locals
  integer(psb_ipk_) :: i

  if (beta == szero) then
    do i=1,n
      y(idx(i)) = x(i)
    end do
  else if (beta == sone) then
    do i=1,n
      y(idx(i)) = y(idx(i))+x(i)
    end do
  else
    do i=1,n
      y(idx(i)) = beta*y(idx(i))
    end do
    do i=1,n
      y(idx(i)) = y(idx(i))+x(i)
    end do
  end if
end subroutine psi_ssctv


subroutine psi_dsctmv(n,k,idx,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, k, idx(:)
  real(psb_dpk_) :: beta, x(:), y(:,:)

  ! Locals
  integer(psb_ipk_) :: i, j, pt

  if (beta == dzero) then
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = x(pt)
      end do
    end do
  else if (beta == done) then
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = y(idx(i),j)+x(pt)
      end do
    end do
  else
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = beta*y(idx(i),j)+x(pt)
      end do
    end do
  end if
end subroutine psi_dsctmv

subroutine psi_dsctv(n,idx,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  real(psb_dpk_) :: beta, x(:), y(:)

  ! Locals
  integer(psb_ipk_) :: i

  if (beta == dzero) then
    do i=1,n
      y(idx(i)) = x(i)
    end do
  else if (beta == done) then
    do i=1,n
      y(idx(i)) = y(idx(i))+x(i)
    end do
  else
    do i=1,n
      y(idx(i)) = beta*y(idx(i))
    end do
    do i=1,n
      y(idx(i)) = y(idx(i))+x(i)
    end do
  end if
end subroutine psi_dsctv

subroutine psi_isctmv(n,k,idx,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, k, idx(:)
  integer(psb_ipk_) :: beta, x(:), y(:,:)

  ! Locals
  integer(psb_ipk_) :: i, j, pt

  if (beta == izero) then
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = x(pt)
      end do
    end do
  else if (beta == ione) then
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = y(idx(i),j)+x(pt)
      end do
    end do
  else
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = beta*y(idx(i),j)+x(pt)
      end do
    end do
  end if
end subroutine psi_isctmv

subroutine psi_isctv(n,idx,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  integer(psb_ipk_) :: beta, x(:), y(:)

  ! Locals
  integer(psb_ipk_) :: i

  if (beta == izero) then
    do i=1,n
      y(idx(i)) = x(i)
    end do
  else if (beta == ione) then
    do i=1,n
      y(idx(i)) = y(idx(i))+x(i)
    end do
  else
    do i=1,n
      y(idx(i)) = beta*y(idx(i))+x(i)
    end do
  end if
end subroutine psi_isctv

subroutine psi_csctmv(n,k,idx,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, k, idx(:)
  complex(psb_spk_) :: beta, x(:), y(:,:)

  ! Locals
  integer(psb_ipk_) :: i, j, pt

  if (beta == czero) then
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = x(pt)
      end do
    end do
  else if (beta == cone) then
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = y(idx(i),j)+x(pt)
      end do
    end do
  else
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = beta*y(idx(i),j)+x(pt)
      end do
    end do
  end if
end subroutine psi_csctmv


subroutine psi_csctv(n,idx,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  complex(psb_spk_) :: beta, x(:), y(:)

  ! Locals
  integer(psb_ipk_) :: i

  if (beta == czero) then
    do i=1,n
      y(idx(i)) = x(i)
    end do
  else if (beta == cone) then
    do i=1,n
      y(idx(i)) = y(idx(i))+x(i)
    end do
  else
    do i=1,n
      y(idx(i)) = beta*y(idx(i))+x(i)
    end do
  end if
end subroutine psi_csctv

subroutine psi_zsctmv(n,k,idx,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, k, idx(:)
  complex(psb_dpk_) :: beta, x(:), y(:,:)

  ! Locals
  integer(psb_ipk_) :: i, j, pt

  if (beta == zzero) then
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = x(pt)
      end do
    end do
  else if (beta == zone) then
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = y(idx(i),j)+x(pt)
      end do
    end do
  else
    pt=0
    do j=1,k
      do i=1,n
        pt=pt+1
        y(idx(i),j) = beta*y(idx(i),j)+x(pt)
      end do
    end do
  end if
end subroutine psi_zsctmv


subroutine psi_zsctv(n,idx,x,beta,y)

  use psb_const_mod
  implicit none

  integer(psb_ipk_) :: n, idx(:)
  complex(psb_dpk_) :: beta, x(:), y(:)

  ! Locals
  integer(psb_ipk_) :: i

  if (beta == zzero) then
    do i=1,n
      y(idx(i)) = x(i)
    end do
  else if (beta == zone) then
    do i=1,n
      y(idx(i)) = y(idx(i))+x(i)
    end do
  else
    do i=1,n
      y(idx(i)) = beta*y(idx(i))+x(i)
    end do
  end if
end subroutine psi_zsctv


subroutine psi_iaxpbyv(m,alpha, x, beta, y, info)
  use psb_const_mod
  use psb_error_mod
  implicit none 

  integer(psb_ipk_), intent(in)               :: m
  integer(psb_ipk_), intent (in)       ::  x(:)
  integer(psb_ipk_), intent (inout)    ::  y(:)
  integer(psb_ipk_), intent (in)       :: alpha, beta
  integer(psb_ipk_), intent(out)                :: info
  integer(psb_ipk_) :: err_act
  integer(psb_ipk_) :: lx, ly
  integer(psb_ipk_) :: ierr(5)
  character(len=20)        :: name, ch_err

  name='psb_geaxpby'
  if(psb_get_errstatus() /= 0) return 
  info=psb_success_
  call psb_erractionsave(err_act)

  if (m < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 1; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  lx = size(x,1)
  ly = size(y,1)
  if (lx < m) then 
    info = psb_err_input_asize_small_i_
    ierr(1) = 3; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (ly < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 5; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if

  if (m>0) call iaxpby(m,ione,alpha,x,lx,beta,y,ly,info)

  call psb_erractionrestore(err_act)
  return

9999 call psb_error_handler(err_act)

  return

end subroutine psi_iaxpbyv
subroutine psi_iaxpby(m,n,alpha, x, beta, y, info)
  use psb_const_mod
  use psb_error_mod
  implicit none 
  integer(psb_ipk_), intent(in)               :: m, n
  integer(psb_ipk_), intent (in)       ::  x(:,:)
  integer(psb_ipk_), intent (inout)    ::  y(:,:)
  integer(psb_ipk_), intent (in)       ::  alpha, beta
  integer(psb_ipk_), intent(out)                :: info
  integer(psb_ipk_) :: err_act
  integer(psb_ipk_) :: lx, ly
  integer(psb_ipk_) :: ierr(5)
  character(len=20)        :: name, ch_err

  name='psb_geaxpby'
  if(psb_get_errstatus() /= 0) return 
  info=psb_success_
  call psb_erractionsave(err_act)

  if (m < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 1; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (n < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 2; ierr(2) = n
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  lx = size(x,1)
  ly = size(y,1)
  if (lx < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 4; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (ly < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 6; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if

  if ((m>0).and.(n>0)) &
       & call iaxpby(m,n,alpha,x,lx,beta,y,ly,info)
  call psb_erractionrestore(err_act)
  return

9999 call psb_error_handler(err_act)

  return

end subroutine psi_iaxpby

subroutine psi_saxpbyv(m,alpha, x, beta, y, info)
  use psb_const_mod
  use psb_error_mod
  implicit none 

  integer(psb_ipk_), intent(in)               :: m
  real(psb_spk_), intent (in)       ::  x(:)
  real(psb_spk_), intent (inout)    ::  y(:)
  real(psb_spk_), intent (in)       :: alpha, beta
  integer(psb_ipk_), intent(out)                :: info
  integer(psb_ipk_) :: err_act
  integer(psb_ipk_) :: lx, ly
  integer(psb_ipk_) :: ierr(5)
  character(len=20)        :: name, ch_err

  name='psb_geaxpby'
  if(psb_get_errstatus() /= 0) return 
  info=psb_success_
  call psb_erractionsave(err_act)

  if (m < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 1; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  lx = size(x,1)
  ly = size(y,1)
  if (lx < m) then 
    info = psb_err_input_asize_small_i_
    ierr(1) = 3; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (ly < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 5; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if

  if (m>0) call saxpby(m,ione,alpha,x,lx,beta,y,ly,info)

  call psb_erractionrestore(err_act)
  return

9999 call psb_error_handler(err_act)

  return

end subroutine psi_saxpbyv
subroutine psi_saxpby(m,n,alpha, x, beta, y, info)
  use psb_const_mod
  use psb_error_mod
  implicit none 
  integer(psb_ipk_), intent(in)               :: m, n
  real(psb_spk_), intent (in)       ::  x(:,:)
  real(psb_spk_), intent (inout)    ::  y(:,:)
  real(psb_spk_), intent (in)       ::  alpha, beta
  integer(psb_ipk_), intent(out)                :: info
  integer(psb_ipk_) :: err_act
  integer(psb_ipk_) :: lx, ly
  integer(psb_ipk_) :: ierr(5)
  character(len=20)        :: name, ch_err

  name='psb_geaxpby'
  if(psb_get_errstatus() /= 0) return 
  info=psb_success_
  call psb_erractionsave(err_act)

  if (m < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 1; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (n < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 2; ierr(2) = n
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  lx = size(x,1)
  ly = size(y,1)
  if (lx < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 4; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (ly < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 6; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if

  if ((m>0).and.(n>0)) &
       & call saxpby(m,n,alpha,x,lx,beta,y,ly,info)
  call psb_erractionrestore(err_act)
  return

9999 call psb_error_handler(err_act)

  return

end subroutine psi_saxpby

subroutine psi_daxpbyv(m,alpha, x, beta, y, info)
  use psb_const_mod
  use psb_error_mod
  implicit none 
  integer(psb_ipk_), intent(in)               :: m
  real(psb_dpk_), intent (in)       ::  x(:)
  real(psb_dpk_), intent (inout)    ::  y(:)
  real(psb_dpk_), intent (in)       :: alpha, beta
  integer(psb_ipk_), intent(out)                :: info
  integer(psb_ipk_) :: err_act
  integer(psb_ipk_) :: lx, ly
  integer(psb_ipk_) :: ierr(5)
  character(len=20)        :: name, ch_err

  name='psb_geaxpby'
  if(psb_get_errstatus() /= 0) return 
  info=psb_success_
  call psb_erractionsave(err_act)

  if (m < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 1; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  lx = size(x,1)
  ly = size(y,1)
  if (lx < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 3; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (ly < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 5; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if

  if (m>0) call daxpby(m,ione,alpha,x,lx,beta,y,ly,info)

  call psb_erractionrestore(err_act)
  return

9999 call psb_error_handler(err_act)

  return

end subroutine psi_daxpbyv
subroutine psi_daxpby(m,n,alpha, x, beta, y, info)
  use psb_const_mod
  use psb_error_mod
  implicit none 
  integer(psb_ipk_), intent(in)               :: m, n
  real(psb_dpk_), intent (in)       ::  x(:,:)
  real(psb_dpk_), intent (inout)    ::  y(:,:)
  real(psb_dpk_), intent (in)       ::  alpha, beta
  integer(psb_ipk_), intent(out)                :: info
  integer(psb_ipk_) :: err_act
  integer(psb_ipk_) :: lx, ly
  integer(psb_ipk_) :: ierr(5)
  character(len=20)        :: name, ch_err

  name='psb_geaxpby'
  if(psb_get_errstatus() /= 0) return 
  info=psb_success_
  call psb_erractionsave(err_act)

  if (m < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 1; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (n < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 2; ierr(2) = n
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  lx = size(x,1)
  ly = size(y,1)
  if (lx < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 4; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (ly < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 6; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if

  if ((m>0).and.(n>0)) call daxpby(m,n,alpha,x,lx,beta,y,ly,info)

  call psb_erractionrestore(err_act)
  return

9999 call psb_error_handler(err_act)

  return
end subroutine psi_daxpby

subroutine psi_caxpbyv(m,alpha, x, beta, y, info)
  use psb_const_mod
  use psb_error_mod
  implicit none 
  integer(psb_ipk_), intent(in)               :: m
  complex(psb_spk_), intent (in)       ::  x(:)
  complex(psb_spk_), intent (inout)    ::  y(:)
  complex(psb_spk_), intent (in)       :: alpha, beta
  integer(psb_ipk_), intent(out)                :: info
  integer(psb_ipk_) :: err_act
  integer(psb_ipk_) :: lx, ly
  integer(psb_ipk_) :: ierr(5)
  character(len=20)        :: name, ch_err

  name='psb_geaxpby'
  if(psb_get_errstatus() /= 0) return 
  info=psb_success_
  call psb_erractionsave(err_act)

  if (m < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 1; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  lx = size(x,1)
  ly = size(y,1)
  if (lx < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 3; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (ly < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 5; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if

  if (m>0) call caxpby(m,ione,alpha,x,lx,beta,y,ly,info)

  call psb_erractionrestore(err_act)
  return

9999 call psb_error_handler(err_act)

  return

end subroutine psi_caxpbyv
subroutine psi_caxpby(m,n,alpha, x, beta, y, info)
  use psb_const_mod
  use psb_error_mod
  implicit none 
  integer(psb_ipk_), intent(in)               :: m, n
  complex(psb_spk_), intent (in)       ::  x(:,:)
  complex(psb_spk_), intent (inout)    ::  y(:,:)
  complex(psb_spk_), intent (in)       ::  alpha, beta
  integer(psb_ipk_), intent(out)                :: info
  integer(psb_ipk_) :: err_act
  integer(psb_ipk_) :: lx, ly
  integer(psb_ipk_) :: ierr(5)
  character(len=20)        :: name, ch_err

  name='psb_geaxpby'
  if(psb_get_errstatus() /= 0) return 
  info=psb_success_
  call psb_erractionsave(err_act)

  if (m < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 1; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (n < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 2; ierr(2) = n
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  lx = size(x,1)
  ly = size(y,1)
  if (lx < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 4; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (ly < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 6; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if

  if ((m>0).and.(n>0)) call caxpby(m,n,alpha,x,lx,beta,y,ly,info)

  call psb_erractionrestore(err_act)
  return

9999 call psb_error_handler(err_act)

  return
end subroutine psi_caxpby

subroutine psi_zaxpbyv(m,alpha, x, beta, y, info)
  use psb_const_mod
  use psb_error_mod
  implicit none 
  integer(psb_ipk_), intent(in)               :: m
  complex(psb_dpk_), intent (in)       ::  x(:)
  complex(psb_dpk_), intent (inout)    ::  y(:)
  complex(psb_dpk_), intent (in)       :: alpha, beta
  integer(psb_ipk_), intent(out)                :: info
  integer(psb_ipk_) :: err_act
  integer(psb_ipk_) :: lx, ly
  integer(psb_ipk_) :: ierr(5)
  character(len=20)        :: name, ch_err

  name='psb_geaxpby'
  if(psb_get_errstatus() /= 0) return 
  info=psb_success_
  call psb_erractionsave(err_act)

  if (m < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 1; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  lx = size(x,1)
  ly = size(y,1)
  if (lx < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 3; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (ly < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 5; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if

  if (m>0) call zaxpby(m,ione,alpha,x,lx,beta,y,ly,info)

  call psb_erractionrestore(err_act)
  return

9999 call psb_error_handler(err_act)

  return

end subroutine psi_zaxpbyv
subroutine psi_zaxpby(m,n,alpha, x, beta, y, info)
  use psb_const_mod
  use psb_error_mod
  implicit none 
  integer(psb_ipk_), intent(in)               :: m, n
  complex(psb_dpk_), intent (in)       ::  x(:,:)
  complex(psb_dpk_), intent (inout)    ::  y(:,:)
  complex(psb_dpk_), intent (in)       ::  alpha, beta
  integer(psb_ipk_), intent(out)                :: info
  integer(psb_ipk_) :: err_act
  integer(psb_ipk_) :: lx, ly
  integer(psb_ipk_) :: ierr(5)
  character(len=20)        :: name, ch_err

  name='psb_geaxpby'
  if(psb_get_errstatus() /= 0) return 
  info=psb_success_
  call psb_erractionsave(err_act)

  if (m < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 1; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (n < 0) then
    info = psb_err_iarg_neg_
    ierr(1) = 2; ierr(2) = n
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  lx = size(x,1)
  ly = size(y,1)
  if (lx < m) then 
    info = psb_err_input_asize_small_i_
    ierr(1) = 4; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if
  if (ly < m) then 
    info = psb_err_input_asize_small_i_ 
    ierr(1) = 6; ierr(2) = m
    call psb_errpush(info,name,i_err=ierr)
    goto 9999 
  end if

  if ((m>0).and.(n>0)) call zaxpby(m,n,alpha,x,lx,beta,y,ly,info)

  call psb_erractionrestore(err_act)
  return

9999 call psb_error_handler(err_act)

  return
end subroutine psi_zaxpby