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c { dg-do run }

c  intrinsic-unix-erf.f

c

c Test Bessel function intrinsics.  

c These functions are only available if provided by system

c

c     David Billinghurst <David.Billinghurst@riotinto.com>

c

      real x, a

      double precision dx, da

      logical fail

      common /flags/ fail

      fail = .false.

      x = 0.6

      dx = x

c     ERF  - error function

      a = 0.6038561

      da = a

      call c_r(ERF(x),a,'ERF(real)')

      call c_d(ERF(dx),da,'ERF(double)')

      call c_d(DERF(dx),da,'DERF(double)')

c     ERFC  - complementary error function

      a = 1.0 - a

      da = a

      call c_r(ERFC(x),a,'ERFC(real)')

      call c_d(ERFC(dx),da,'ERFC(double)')

      call c_d(DERFC(dx),da,'DERFC(double)')

      if ( fail ) call abort()

      end

      subroutine failure(label)

c     Report failure and set flag

      character*(*) label

      logical fail

      common /flags/ fail

      write(6,'(a,a,a)') 'Test ',label,' FAILED'

      fail = .true.

      end

      subroutine c_r(a,b,label)

c     Check if REAL a equals b, and fail otherwise

      real a, b

      character*(*) label

      if ( abs(a-b) .gt. 1.0e-5 ) then

         call failure(label)

         write(6,*) 'Got ',a,' expected ', b

      end if

      end

      subroutine c_d(a,b,label)

c     Check if DOUBLE PRECISION a equals b, and fail otherwise

      double precision a, b

      character*(*) label

      if ( abs(a-b) .gt. 1.0d-5 ) then

         call failure(label)

         write(6,*) 'Got ',a,' expected ', b

      end if

      end