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 ! { dg-do run } ! { dg-options "-ffloat-store" } ! ! PR fortran/33197 ! ! Check for Fortran 2008's ATAN(Y,X) - which is equivalent ! to Fortran 77's ATAN2(Y,X). ! integer :: i real, parameter :: pi4 = 2*acos(0.0) real, parameter :: pi8 = 2*acos(0.0d0) do i = 1, 10 if(atan(1.0, i/10.0) -atan2(1.0, i/10.) /= 0.0) STOP 1 if(atan(1.0d0,i/10.0d0)-atan2(1.0d0,i/10.0d0) /= 0.0d0) STOP 2 end do ! Atan(1,1) = Pi/4 if (abs(atan(1.0,1.0) -pi4/4.0) > epsilon(pi4)) STOP 3 if (abs(atan(1.0d0,1.0d0)-pi8/4.0d0) > epsilon(pi8)) STOP 4 ! Atan(-1,1) = -Pi/4 if (abs(atan(-1.0,1.0) +pi4/4.0) > epsilon(pi4)) STOP 5 if (abs(atan(-1.0d0,1.0d0)+pi8/4.0d0) > epsilon(pi8)) STOP 6 ! Atan(1,-1) = 3/4*Pi if (abs(atan(1.0,-1.0) -3.0*pi4/4.0) > epsilon(pi4)) STOP 7 if (abs(atan(1.0d0,-1.0d0)-3.0d0*pi8/4.0d0) > epsilon(pi8)) STOP 8 ! Atan(-1,-1) = -3/4*Pi if (abs(atan(-1.0,-1.0) +3.0*pi4/4.0) > epsilon(pi4)) STOP 9 if (abs(atan(-1.0d0,-1.0d0)+3.0d0*pi8/4.0d0) > epsilon(pi8)) STOP 10 ! Atan(3,-5) = 2.60117315331920908301906501867... = Pi - 3/2 atan(3/5) if (abs(atan(3.0,-5.0) -2.60117315331920908301906501867) > epsilon(pi4)) STOP 11 if (abs(atan(3.0d0,-5.0d0)-2.60117315331920908301906501867d0) > epsilon(pi8)) STOP 12 end