1-- C45532E.ADA
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-- OBJECTIVE:
26--     CHECK THAT THE OPERATOR "*" PRODUCES CORRECT RESULTS
27--     FOR FIXED POINT TYPES USING 3 SUBTESTS.
28--       THIS TEST REQUIRES MIN_WORD_LENGTH = 16.
29--       THIS TEST USES VALUES OF DELTA WHICH ARE LESS THAN 0.5.
30--
31--     TEST CASES ARE:
32--       A) THE OPERATOR *, A, B, AND A * B ALL MODEL NUMBERS.
33--       B) THE OPERATOR *, A, B MODEL NUMBERS A * B NOT.
34--       C) THE OPERATOR *, USING NO MODEL NUMBERS.
35--
36--     REPEAT FOR MINIMUM REQUIRED WORD LENGTHS OF 12, 16, 32 AND 48,
37--     WITH RANGE <, =, AND > THAN 1.0 AND
38--     WITH DELTA <, =, AND > THAN 1.0.
39
40-- HISTORY:
41--     NTW 09/08/86 CREATED ORIGINAL TEST.
42--     RJW 11/05/86 REVISED COMMENTS.
43--     DHH 01/13/88 ADDED APPLICABILITY CRITERIA AND STANDARD HEADER.
44--     RDH 04/27/90 REVISED APPLICABILITY CRITERIA.
45--     BCB 10/03/90 REMOVED APPLICABILITY CRITERIA AND N/A => ERROR
46--                  LINE.  CHANGED EXTENSION FROM '.DEP' TO '.ADA'.
47
48WITH REPORT;
49PROCEDURE C45532E IS
50
51     USE REPORT;
52
53     MIN_WORD_LENGTH : CONSTANT := 16;
54     FULL_SCALE      : CONSTANT := 2 ** (MIN_WORD_LENGTH - 1);
55     FORTH           : CONSTANT := FULL_SCALE / 4;
56     DEL1            : CONSTANT := 0.5 / FULL_SCALE;
57     TYPE FX_0P5 IS DELTA DEL1 * 1 RANGE -0.5 .. 0.5 - DEL1 * 1;
58     TYPE FX_1   IS DELTA DEL1 * 2 RANGE -1.0 .. 1.0 - DEL1 * 2;
59     TYPE FX_2   IS DELTA DEL1 * 4 RANGE -2.0 .. 2.0 - DEL1 * 4;
60
61BEGIN TEST ("C45532E", "FIXED POINT OPERATOR ""*""" );
62
63     --------------------------------------------------
64
65     -- CASE A) THE OPERATOR *, A, B, AND A * B ALL MODEL NUMBERS.
66
67A:   DECLARE
68          A              : FX_0P5  := 0.0;
69          B              : FX_2    := 0.0;
70          RESULT_VALUE   : FX_1    := 0.0;
71          LOWEST_ACCEPTABLE_VALUE  : FX_1 := FX_1 (0.125);
72          HIGHEST_ACCEPTABLE_VALUE : FX_1 := FX_1 (0.125);
73     BEGIN
74          IF EQUAL (3, 3) THEN
75               A := FX_0P5 (0.25);                -- A MODEL NUMBER
76               B := FX_2   (0.50);                -- A MODEL NUMBER
77          END IF;
78
79          RESULT_VALUE := FX_1 (A * B);
80
81          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
82             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
83               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
84                    &  "WHEN A, B, AND A * B ARE ALL MODEL NUMBERS");
85          END IF;
86     END A;
87
88     --------------------------------------------------
89
90     -- CASE B) THE OPERATOR *, A, B MODEL NUMBERS A * B NOT.
91
92B:   DECLARE
93          A              : FX_0P5  := 0.0;
94          B              : FX_1    := 0.0;
95          RESULT_VALUE   : FX_2    := 0.0;
96          LOW_COUNT     : CONSTANT := FULL_SCALE / 64;
97          HIGH_COUNT    : CONSTANT := LOW_COUNT + 1;
98          LOWEST_ACCEPTABLE_VALUE  :  FX_2
99                                   := FX_2 (4 * DEL1 * LOW_COUNT );
100          HIGHEST_ACCEPTABLE_VALUE :  FX_2
101                                   := FX_2 (4 * DEL1 * HIGH_COUNT);
102     BEGIN
103          IF EQUAL (3, 3) THEN
104               A := FX_0P5 (DEL1 * (FORTH + 1) ); -- A MODEL NUMBER
105               B := FX_1   (DEL1 * (FORTH * 2) ); -- A MODEL NUMBER
106          END IF;
107
108          RESULT_VALUE := FX_2 (A * B);
109
110          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
111             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
112               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
113                    &  "WHEN A, B MODEL NUMBERS A * B NOT");
114          END IF;
115     END B;
116
117     --------------------------------------------------
118
119     -- CASE C) THE OPERATOR *, USING NO MODEL NUMBERS
120
121C:   DECLARE
122          A              : FX_1    := 0.0;
123          B              : FX_1    := 0.0;
124          RESULT_VALUE   : FX_2    := 0.0;
125          LOW_COUNT     : CONSTANT := FULL_SCALE / 128 - 1;
126          HIGH_COUNT    : CONSTANT := FULL_SCALE / 128 + 1;
127          LOWEST_ACCEPTABLE_VALUE  :  FX_2
128                                   := FX_2 (4 * DEL1 * LOW_COUNT );
129          HIGHEST_ACCEPTABLE_VALUE :  FX_2
130                                   := FX_2 (4 * DEL1 * HIGH_COUNT);
131     BEGIN
132          IF EQUAL (3, 3) THEN
133               A := FX_1 (DEL1 * (FORTH + 1) );   -- NOT MODEL NUMBER
134               B := FX_1 (DEL1 * (FORTH - 1) );   -- NOT MODEL NUMBER
135          END IF;
136
137          RESULT_VALUE := FX_2 (A * B);
138
139          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
140             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
141               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
142                    &  "WHEN USING NO MODEL NUMBERS");
143          END IF;
144     END C;
145
146     --------------------------------------------------
147
148
149     RESULT;
150
151END C45532E;
152