1-- C45532I.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 = 32.
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
48
49WITH REPORT;
50PROCEDURE C45532I IS
51
52     USE REPORT;
53
54     MIN_WORD_LENGTH : CONSTANT := 32;
55     FULL_SCALE      : CONSTANT := 2 ** (MIN_WORD_LENGTH - 1);
56     FORTH           : CONSTANT := FULL_SCALE / 4;
57     DEL1            : CONSTANT := 0.5 / FULL_SCALE;
58     TYPE FX_0P5 IS DELTA DEL1 * 1 RANGE -0.5 .. 0.5 - DEL1 * 1;
59     TYPE FX_1   IS DELTA DEL1 * 2 RANGE -1.0 .. 1.0 - DEL1 * 2;
60     TYPE FX_2   IS DELTA DEL1 * 4 RANGE -2.0 .. 2.0 - DEL1 * 4;
61
62BEGIN TEST ("C45532I", "FIXED POINT OPERATOR ""*""" );
63
64     --------------------------------------------------
65
66     -- CASE A) THE OPERATOR *, A, B, AND A * B ALL MODEL NUMBERS.
67
68A:   DECLARE
69          A              : FX_0P5  := 0.0;
70          B              : FX_2    := 0.0;
71          RESULT_VALUE   : FX_1    := 0.0;
72          LOWEST_ACCEPTABLE_VALUE  : FX_1 := FX_1 (0.125);
73          HIGHEST_ACCEPTABLE_VALUE : FX_1 := FX_1 (0.125);
74     BEGIN
75          IF EQUAL (3, 3) THEN
76               A := FX_0P5 (0.25);                -- A MODEL NUMBER
77               B := FX_2   (0.50);                -- A MODEL NUMBER
78          END IF;
79
80          RESULT_VALUE := FX_1 (A * B);
81
82          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
83             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
84               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
85                    &  "WHEN A, B, AND A * B ARE ALL MODEL NUMBERS");
86          END IF;
87     END A;
88
89     --------------------------------------------------
90
91     -- CASE B) THE OPERATOR *, A, B MODEL NUMBERS A * B NOT.
92
93B:   DECLARE
94          A              : FX_0P5  := 0.0;
95          B              : FX_1    := 0.0;
96          RESULT_VALUE   : FX_2    := 0.0;
97          LOW_COUNT     : CONSTANT := FULL_SCALE / 64;
98          HIGH_COUNT    : CONSTANT := LOW_COUNT + 1;
99          LOWEST_ACCEPTABLE_VALUE  :  FX_2
100                                   := FX_2 (4 * DEL1 * LOW_COUNT );
101          HIGHEST_ACCEPTABLE_VALUE :  FX_2
102                                   := FX_2 (4 * DEL1 * HIGH_COUNT);
103     BEGIN
104          IF EQUAL (3, 3) THEN
105               A := FX_0P5 (DEL1 * (FORTH + 1) ); -- A MODEL NUMBER
106               B := FX_1   (DEL1 * (FORTH * 2) ); -- A MODEL NUMBER
107          END IF;
108
109          RESULT_VALUE := FX_2 (A * B);
110
111          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
112             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
113               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
114                    &  "WHEN A, B MODEL NUMBERS A * B NOT");
115          END IF;
116     END B;
117
118     --------------------------------------------------
119
120     -- CASE C) THE OPERATOR *, USING NO MODEL NUMBERS
121
122C:   DECLARE
123          A              : FX_1    := 0.0;
124          B              : FX_1    := 0.0;
125          RESULT_VALUE   : FX_2    := 0.0;
126          LOW_COUNT     : CONSTANT := FULL_SCALE / 128 - 1;
127          HIGH_COUNT    : CONSTANT := FULL_SCALE / 128 + 1;
128          LOWEST_ACCEPTABLE_VALUE  :  FX_2
129                                   := FX_2 (4 * DEL1 * LOW_COUNT );
130          HIGHEST_ACCEPTABLE_VALUE :  FX_2
131                                   := FX_2 (4 * DEL1 * HIGH_COUNT);
132     BEGIN
133          IF EQUAL (3, 3) THEN
134               A := FX_1 (DEL1 * (FORTH + 1) );   -- NOT MODEL NUMBER
135               B := FX_1 (DEL1 * (FORTH - 1) );   -- NOT MODEL NUMBER
136          END IF;
137
138          RESULT_VALUE := FX_2 (A * B);
139
140          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
141             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
142               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
143                    &  "WHEN USING NO MODEL NUMBERS");
144          END IF;
145     END C;
146
147     --------------------------------------------------
148
149
150     RESULT;
151
152END C45532I;
153