1-- C45532F.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
41-- HISTORY:
42--     NTW 09/08/86 CREATED ORIGINAL TEST.
43--     RJW 11/05/86 REVISED COMMENTS.
44--     DHH 10/19/87 SHORTENED LINES CONTAINING MORE THAN 72 CHARACTERS.
45--     RDH 04/27/90 REVISED APPLICABILITY CRITERIA.
46--     BCB 10/03/90 REMOVED APPLICABILITY CRITERIA AND N/A => ERROR
47--                  LINE.  CHANGED EXTENSION FROM '.DEP' TO '.ADA'.
48
49WITH REPORT;
50PROCEDURE C45532F IS
51
52     USE REPORT;
53
54     MIN_WORD_LENGTH : CONSTANT := 16;            -- MUST BE EVEN & >= 6
55     FULL_SCALE      : CONSTANT := 2 ** (MIN_WORD_LENGTH - 1);
56     FORTH           : CONSTANT := FULL_SCALE / 4;
57     A_THIRD         : CONSTANT := FULL_SCALE / 3;
58     DEL1            : CONSTANT := 0.5 / FULL_SCALE;
59     TYPE FX_0P5 IS DELTA DEL1 * 1 RANGE -0.5 ..
60                                      0.5 - DEL1 * 1;
61     TYPE FX_1   IS DELTA DEL1 * 2 RANGE -1.0 ..
62                                      1.0 - DEL1 * 2;
63     TYPE FX_2   IS DELTA DEL1 * 4 RANGE -2.0 ..
64                                      2.0 - DEL1 * 4;
65
66BEGIN TEST ("C45532F", "FIXED POINT OPERATOR ""/""" );
67
68     --------------------------------------------------
69
70     -- CASE A) THE OPERATOR /, A, B, AND A / B ALL MODEL NUMBERS.
71
72A:   DECLARE
73          A              : FX_0P5  := 0.0;
74          B              : FX_1    := 0.0;
75          RESULT_VALUE   : FX_2    := 0.0;
76          LOWEST_ACCEPTABLE_VALUE  : FX_2 := FX_2 (0.5);
77          HIGHEST_ACCEPTABLE_VALUE : FX_2 := FX_2 (0.5);
78     BEGIN
79          IF EQUAL (3, 3) THEN
80               A := FX_0P5 (0.125);               -- A MODEL NUMBER
81               B := FX_1   (0.25);                -- A MODEL NUMBER
82          END IF;
83
84          RESULT_VALUE := FX_2 (A / B);
85
86          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
87             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
88               FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
89                    &  "WHEN A, B, AND A / B ARE ALL MODEL NUMBERS");
90          END IF;
91     END A;
92
93     --------------------------------------------------
94
95     -- CASE B) THE OPERATOR /, A, B MODEL NUMBERS A / B NOT.
96
97B:   DECLARE
98          A              : FX_0P5  := 0.0;
99          B              : FX_0P5  := 0.0;
100          RESULT_VALUE   : FX_1    := 0.0;
101          LOWEST_ACCEPTABLE_VALUE  :  FX_1
102                                   := FX_1 (2 * DEL1 * A_THIRD);
103          HIGHEST_ACCEPTABLE_VALUE :  FX_1
104                                   := FX_1 (2 * DEL1 * (A_THIRD + 1) );
105     BEGIN
106          IF EQUAL (3, 3) THEN
107               A := FX_0P5 (DEL1 * 1);            -- A MODEL NUMBER
108               B := FX_0P5 (DEL1 * 3);            -- A MODEL NUMBER
109          END IF;
110
111          RESULT_VALUE := FX_1 (A / B);
112
113          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
114             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
115               FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
116                    &  "WHEN A, B MODEL NUMBERS A / B NOT");
117          END IF;
118     END B;
119
120     --------------------------------------------------
121
122     -- CASE C) THE OPERATOR /, USING NO MODEL NUMBERS
123
124C:   DECLARE
125          A              : FX_1    := 0.0;
126          B              : FX_1    := 0.0;
127          RESULT_VALUE   : FX_0P5  := 0.0;
128          LOW_COUNT    : CONSTANT  := 2 * A_THIRD;
129                            --   := (2 * FULL_SCALE * (2 * FORTH + 0))
130                            --                      / (6 * FORTH + 2);
131          HIGH_COUNT   : CONSTANT  := 2 * A_THIRD + 4;
132                            --   := (2 * FULL_SCALE * (2 * FORTH + 2))
133                            --                      / (6 * FORTH + 0);
134          LOWEST_ACCEPTABLE_VALUE  :  FX_0P5
135                                   := FX_0P5 (DEL1 * LOW_COUNT );
136          HIGHEST_ACCEPTABLE_VALUE :  FX_0P5
137                                   := FX_0P5 (DEL1 * HIGH_COUNT );
138     BEGIN
139          IF EQUAL (3, 3) THEN     -- A AND B NOT MODEL NUMBERS
140               A := FX_1 (DEL1 * (2 * FORTH + 1));
141               B := FX_1 (DEL1 * (6 * FORTH + 1));
142          END IF;
143
144          RESULT_VALUE := FX_0P5 (A / B);
145
146          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
147             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
148               FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
149                    &  "WHEN USING NO MODEL NUMBERS");
150          END IF;
151     END C;
152
153     --------------------------------------------------
154
155
156     RESULT;
157
158END C45532F;
159