old-autovect-branch/gcc/testsuite/ada/acats/support/fc70a00.a

   1 -- FC70A00.A
   2 --
   3 --                             Grant of Unlimited Rights
   4 --
   5 --     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
   6 --     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
   7 --     unlimited rights in the software and documentation contained herein.
   8 --     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
   9 --     this public release, the Government intends to confer upon all
  10 --     recipients unlimited rights  equal to those held by the Government.
  11 --     These rights include rights to use, duplicate, release or disclose the
  12 --     released technical data and computer software in whole or in part, in
  13 --     any manner and for any purpose whatsoever, and to have or permit others
  14 --     to do so.
  15 --
  16 --                                    DISCLAIMER
  17 --
  18 --     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
  19 --     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
  20 --     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
  21 --     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
  22 --     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
  23 --     PARTICULAR PURPOSE OF SAID MATERIAL.
  24 --*
  25 --
  26 -- FOUNDATION DESCRIPTION:
  27 --      This file simulates a generic complex integer support package, to be
  28 --      used for tests covering generic formal packages.
  29 --
  30 -- CHANGE HISTORY:
  31 --      06 Dec 94   SAIC    ACVC 2.0
  32 --
  33 --!
  34
  35 generic               -- Complex integer abstraction.
  36    type Int_Type is range <>;
  37 package FC70A00 is
  38
  39    -- Simulate a generic complex integer support package. Complex integers
  40    -- are treated as coordinates in the Cartesian plane.
  41
  42
  43    type Complex_Type is private;
  44
  45    Zero : constant Complex_Type;                      -- (0,0).
  46    One  : constant Complex_Type;                      -- (1,0).
  47
  48
  49    function "-" (Right : Complex_Type)                -- Invert a complex
  50      return Complex_Type;                             -- integer.
  51
  52    function "+" (Left, Right : Complex_Type)          -- Add two complex
  53      return Complex_Type;                             -- integers.
  54
  55    function "*" (Left, Right : Complex_Type)          -- Multiply two complex
  56      return Complex_Type;                             -- integers.
  57
  58    function Reciprocal (Right : Complex_Type)         -- Return the reciprocal
  59      return Complex_Type;                             -- of a complex integer.
  60
  61    function Complex (Real, Imag : Int_Type)           -- Create a complex
  62      return Complex_Type;                             -- integer.
  63
  64 private
  65
  66    type Complex_Type is record
  67       Real : Int_Type;
  68       Imag : Int_Type;
  69    end record;
  70
  71    Zero : constant Complex_Type := (Real => 0, Imag => 0);
  72    One  : constant Complex_Type := (Real => 1, Imag => 0);
  73
  74 end FC70A00;
  75
  76
  77      --==================================================================--
  78
  79
  80 package body FC70A00 is  -- Complex integer abstraction.
  81
  82    function Complex (Real, Imag : Int_Type) return Complex_Type is
  83    begin
  84       return ( (Real, Imag) );
  85    end Complex;
  86
  87                --==============================================--
  88
  89    function "-" (Right : Complex_Type) return Complex_Type is
  90    begin
  91       return ( (-Right.Real, -Right.Imag) );
  92    end "-";
  93
  94                --==============================================--
  95
  96    function "+" (Left, Right : Complex_Type) return Complex_Type is
  97    begin
  98       return ( (Left.Real + Right.Real, Left.Imag + Right.Imag) );
  99    end "+";
 100
 101                --==============================================--
 102
 103    function "*" (Left, Right : Complex_Type) return Complex_Type is
 104    begin
 105       return ( (Real => (Left.Real * Right.Real) - (Left.Imag * Right.Imag),
 106                 Imag => (Left.Imag * Right.Real) + (Left.Real * Right.Imag)) );
 107    end "*";
 108
 109                --==============================================--
 110
 111    function Reciprocal (Right : Complex_Type) return Complex_Type is
 112       Denominator : Int_Type := Right.Real**2 + Right.Imag**2;
 113    begin  -- NOTE: Results are truncated.
 114       return ( (Right.Real/Denominator, -Right.Imag/Denominator) );
 115    end Reciprocal;
 116
 117 end FC70A00;