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