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-- C45532F.ADA
-- 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.
--*
-- OBJECTIVE:
-- CHECK THAT THE OPERATOR "/" PRODUCES CORRECT RESULTS
-- FOR FIXED POINT TYPES USING 3 SUBTESTS.
-- THIS TEST REQUIRES MIN_WORD_LENGTH = 16.
-- THIS TEST USES VALUES OF DELTA WHICH ARE LESS THAN 0.5.
--
-- TEST CASES ARE:
-- A) THE OPERATOR /, A, B, AND A / B ALL MODEL NUMBERS.
-- B) THE OPERATOR /, A, B MODEL NUMBERS A / B NOT.
-- C) THE OPERATOR /, USING NO MODEL NUMBERS.
--
-- REPEAT FOR MINIMUM REQUIRED WORD LENGTHS OF 12, 16, 32 AND 48,
-- WITH RANGE <, =, AND > THAN 1.0 AND
-- WITH DELTA <, =, AND > THAN 1.0.
-- HISTORY:
-- NTW 09/08/86 CREATED ORIGINAL TEST.
-- RJW 11/05/86 REVISED COMMENTS.
-- DHH 10/19/87 SHORTENED LINES CONTAINING MORE THAN 72 CHARACTERS.
-- RDH 04/27/90 REVISED APPLICABILITY CRITERIA.
-- BCB 10/03/90 REMOVED APPLICABILITY CRITERIA AND N/A => ERROR
-- LINE. CHANGED EXTENSION FROM '.DEP' TO '.ADA'.
WITH REPORT;
PROCEDURE C45532F IS
USE REPORT;
MIN_WORD_LENGTH : CONSTANT := 16; -- MUST BE EVEN & >= 6
FULL_SCALE : CONSTANT := 2 ** (MIN_WORD_LENGTH - 1);
FORTH : CONSTANT := FULL_SCALE / 4;
A_THIRD : CONSTANT := FULL_SCALE / 3;
DEL1 : CONSTANT := 0.5 / FULL_SCALE;
TYPE FX_0P5 IS DELTA DEL1 * 1 RANGE -0.5 ..
0.5 - DEL1 * 1;
TYPE FX_1 IS DELTA DEL1 * 2 RANGE -1.0 ..
1.0 - DEL1 * 2;
TYPE FX_2 IS DELTA DEL1 * 4 RANGE -2.0 ..
2.0 - DEL1 * 4;
BEGIN TEST ("C45532F", "FIXED POINT OPERATOR ""/""" );
--------------------------------------------------
-- CASE A) THE OPERATOR /, A, B, AND A / B ALL MODEL NUMBERS.
A: DECLARE
A : FX_0P5 := 0.0;
B : FX_1 := 0.0;
RESULT_VALUE : FX_2 := 0.0;
LOWEST_ACCEPTABLE_VALUE : FX_2 := FX_2 (0.5);
HIGHEST_ACCEPTABLE_VALUE : FX_2 := FX_2 (0.5);
BEGIN
IF EQUAL (3, 3) THEN
A := FX_0P5 (0.125); -- A MODEL NUMBER
B := FX_1 (0.25); -- A MODEL NUMBER
END IF;
RESULT_VALUE := FX_2 (A / B);
IF (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
& "WHEN A, B, AND A / B ARE ALL MODEL NUMBERS");
END IF;
END A;
--------------------------------------------------
-- CASE B) THE OPERATOR /, A, B MODEL NUMBERS A / B NOT.
B: DECLARE
A : FX_0P5 := 0.0;
B : FX_0P5 := 0.0;
RESULT_VALUE : FX_1 := 0.0;
LOWEST_ACCEPTABLE_VALUE : FX_1
:= FX_1 (2 * DEL1 * A_THIRD);
HIGHEST_ACCEPTABLE_VALUE : FX_1
:= FX_1 (2 * DEL1 * (A_THIRD + 1) );
BEGIN
IF EQUAL (3, 3) THEN
A := FX_0P5 (DEL1 * 1); -- A MODEL NUMBER
B := FX_0P5 (DEL1 * 3); -- A MODEL NUMBER
END IF;
RESULT_VALUE := FX_1 (A / B);
IF (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
& "WHEN A, B MODEL NUMBERS A / B NOT");
END IF;
END B;
--------------------------------------------------
-- CASE C) THE OPERATOR /, USING NO MODEL NUMBERS
C: DECLARE
A : FX_1 := 0.0;
B : FX_1 := 0.0;
RESULT_VALUE : FX_0P5 := 0.0;
LOW_COUNT : CONSTANT := 2 * A_THIRD;
-- := (2 * FULL_SCALE * (2 * FORTH + 0))
-- / (6 * FORTH + 2);
HIGH_COUNT : CONSTANT := 2 * A_THIRD + 4;
-- := (2 * FULL_SCALE * (2 * FORTH + 2))
-- / (6 * FORTH + 0);
LOWEST_ACCEPTABLE_VALUE : FX_0P5
:= FX_0P5 (DEL1 * LOW_COUNT );
HIGHEST_ACCEPTABLE_VALUE : FX_0P5
:= FX_0P5 (DEL1 * HIGH_COUNT );
BEGIN
IF EQUAL (3, 3) THEN -- A AND B NOT MODEL NUMBERS
A := FX_1 (DEL1 * (2 * FORTH + 1));
B := FX_1 (DEL1 * (6 * FORTH + 1));
END IF;
RESULT_VALUE := FX_0P5 (A / B);
IF (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
& "WHEN USING NO MODEL NUMBERS");
END IF;
END C;
--------------------------------------------------
RESULT;
END C45532F;
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