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-- FXF2A00.A
--
-- Grant of Unlimited Rights
--
-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
-- unlimited rights in the software and documentation contained herein.
-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
-- this public release, the Government intends to confer upon all
-- recipients unlimited rights equal to those held by the Government.
-- These rights include rights to use, duplicate, release or disclose the
-- released technical data and computer software in whole or in part, in
-- any manner and for any purpose whatsoever, and to have or permit others
-- to do so.
--
-- DISCLAIMER
--
-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
-- PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- FOUNDATION DESCRIPTION:
-- This foundation declares supporting objects, types and a generic
-- function for testing decimal fixed point operations.
--
-- The generic function contains a loop which steps through two arrays:
-- one of binary operations and one of operands. For each iteration, the
-- current operation is performed on the current operand and a variable
-- "Result" e.g.:
--
-- Result := Operation(2)(Operand(3), Result);
--
-- The result of each operation is cumulated in Result and returned to
-- the caller when the loop completes.
--
-- CHANGE HISTORY:
-- 12 Mar 96 SAIC Prerelease version for ACVC 2.1.
--
--!
package FXF2A00 is
Loop_Count : constant := 30000; -- # test iterations.
Optr_Count : constant := 6; -- # operations in op sequence.
Opnd_Count : constant := 5; -- # different operands.
type Loop_Range is range 1 .. Loop_Count; -- range 1 .. 30000.
type Optr_Range is mod Optr_Count; -- range 0 .. 5.
type Opnd_Range is mod Opnd_Count; -- range 0 .. 4.
generic
type Decimal_Fixed is delta <> digits <>;
type Operator_Ptr is access
function (L, R : Decimal_Fixed) return Decimal_Fixed;
type Operator_Table is array (Optr_Range) of Operator_Ptr;
type Operand_Table is array (Opnd_Range) of Decimal_Fixed;
function Operations_Loop (Initial : Decimal_Fixed;
Operator: Operator_Table;
Operand : Operand_Table) return Decimal_Fixed;
end FXF2A00;
--==================================================================--
package body FXF2A00 is
function Operations_Loop (Initial : Decimal_Fixed;
Operator: Operator_Table;
Operand : Operand_Table) return Decimal_Fixed is
Result : Decimal_Fixed := Initial; -- Cumulator.
Optr_Index : Optr_Range := 0; -- Index into operations table.
Opnd_Index : Opnd_Range := 0; -- Index into operand table.
begin
for Count in Loop_Range loop
Result := Operator(Optr_Index) (Result, Operand(Opnd_Index));
Optr_Index := Optr_Index + 1; -- Modular addition.
Opnd_Index := Opnd_Index + 1; -- Modular addition.
end loop;
return Result;
end Operations_Loop;
end FXF2A00;
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