mathops.f90

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module mathops
  use num_types, only : rp
  implicit none
  private
 
  public :: opchsign, opcolv, opcolv3c, opadd2cm, opadd2col
  
contains
 
  subroutine opchsign(a1, a2, a3, gdim, n)
    integer, intent(in) :: n, gdim
    real(kind=rp), dimension(n), intent(inout) :: a1, a2, a3
    integer :: i
 
    if (gdim .eq. 3) then
       do i = 1, n
          a1(i) = -a1(i)
          a2(i) = -a2(i)
          a3(i) = -a3(i)
       end do
    else
       do i = 1, n
          a1(i) = -a1(i)
          a2(i) = -a2(i)
       end do
    end if
 
  end subroutine opchsign
 
  subroutine opcolv(a1, a2, a3, c, gdim, n)
    integer, intent(in) :: n, gdim
    real(kind=rp), dimension(n), intent(inout) :: a1, a2, a3
    real(kind=rp), dimension(n), intent(in) :: c
    integer :: i
 
    if (gdim .eq. 3) then
       do i = 1, n
          a1(i) = a1(i)*c(i)
          a2(i) = a2(i)*c(i)
          a3(i) = a3(i)*c(i)
       end do
    else
       do i = 1, n
          a1(i) = a1(i)*c(i)
          a2(i) = a2(i)*c(i)
       end do
    end if
 
  end subroutine opcolv
 
  subroutine opcolv3c(a1, a2, a3, b1, b2, b3, c, d, n, gdim)
    integer, intent(in) :: n, gdim
    real(kind=rp), dimension(n), intent(inout) :: a1, a2, a3
    real(kind=rp), dimension(n), intent(in) :: b1, b2, b3
    real(kind=rp), intent(in) :: c(n), d
    integer :: i
 
    if (gdim .eq. 3) then
       do i = 1, n
          a1(i) = b1(i)*c(i)*d
          a2(i) = b2(i)*c(i)*d
          a3(i) = b3(i)*c(i)*d
       end do
    else
       do i = 1, n
          a1(i) =  b1(i)*c(i)*d
          a2(i) =  b2(i)*c(i)*d
       end do
    end if
 
  end subroutine opcolv3c
 
  subroutine opadd2cm(a1, a2, a3, b1, b2, b3, c, n, gdim)
    integer, intent(in) :: n, gdim
    real(kind=rp), dimension(n), intent(inout) :: a1, a2, a3
    real(kind=rp), dimension(n), intent(in) :: b1, b2, b3
    real(kind=rp), intent(in) :: c
    integer :: i
 
    if (gdim .eq. 3) then
       do i = 1, n
          a1(i) = a1(i) + b1(i)*c
          a2(i) = a2(i) + b2(i)*c
          a3(i) = a3(i) + b3(i)*c
       end do
    else
       do i = 1, n
          a1(i) = a1(i) + b1(i)*c
          a2(i) = a2(i) + b2(i)*c
       end do
    end if
 
  end subroutine opadd2cm
 
  subroutine opadd2col(a1, a2, a3, b1, b2, b3, c, n, gdim)
    integer, intent(in) :: n, gdim
    real(kind=rp), dimension(n), intent(inout) :: a1, a2, a3
    real(kind=rp), dimension(n), intent(in) :: b1, b2, b3
    real(kind=rp), intent(in) :: c(n)
    integer :: i
 
    if (gdim .eq. 3) then
       do i = 1, n
          a1(i) = a1(i) + b1(i)*c(i)
          a2(i) = a2(i) + b2(i)*c(i)
          a3(i) = a3(i) + b3(i)*c(i)
       end do
    else
       do i = 1, n
          a1(i) = a1(i) + b1(i)*c(i)
          a2(i) = a2(i) + b2(i)*c(i)
       end do
    end if
 
  end subroutine opadd2col
 
end module mathops