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    Types: TextFile
    Names: »B«

└─⟦5f3412b64⟧ Bits:30000745 8mm tape, Rational 1000, ENVIRONMENT 12_6_5 TOOLS 
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└─⟦d10a02448⟧ Bits:30000409 8mm tape, Rational 1000, ENVIRONMENT, D_12_7_3
    └─ ⟦fc9b38f02⟧ »DATA« 
        └─⟦9b46a407a⟧ 
            └─⟦2e03b931c⟧ 
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TextFile

separate (Generic_Elementary_Functions)

function Kf_Acocy (X, Cycle : Float_Type) return Float_Type is

   Y, Sign_X, Z1, Z2, U, V, Cy, Result : Common_Float;

   Zero : constant := 0.0;
   One  : constant := 1.0;
   Two  : constant := 2.0;

   Two_Pi_Inv : constant := 0.15915_49430_91895_33576_88837_63372_51436_2034;

begin

-- Filter out exceptional cases.
   Cy := Common_Float (Cycle);
   if Cy <= Zero then
      raise Argument_Error;
   end if;

   Y      := Common_Float (X);
   Sign_X := Copy_Sign (One, Y);
   Y      := abs (Y);

   if Y > One then
      raise Argument_Error;
   end if;

   if (Y = One) then
      if (Sign_X = One) then
         Result := 0.0;
      else
         Result := Cy / Two;
      end if;
      return (Float_Type (Result));
   end if;

   if (Y = Zero) then
      Result := Cy / 4.0;
      return (Float_Type (Result));
   end if;

   V := (One - Y) / (One + Y);
   V := Kf_Sqrt (V);
   U := One;
   Kp_Atn (V, U, Z1, Z2);
   Z1 := Z1 + Z1;
   Z2 := Z2 + Z2;


   if Sign_X = One then
      Result := ((Z1 + Z2) * Two_Pi_Inv) * Cy;
   else
      Result := Cy * 0.5 - ((Z1 + Z2) * Two_Pi_Inv) * Cy;
   end if;

   return (Float_Type (Result));

end Kf_Acocy;