1-- C45532H.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 GREATER THAN OR
30--       EQUAL TO 0.5.
31--
32--     TEST CASES ARE:
33--       A) THE OPERATOR /, A, B, AND A / B ALL MODEL NUMBERS.
34--       B) THE OPERATOR /, A, B MODEL NUMBERS A / B NOT.
35--       C) THE OPERATOR /, USING NO MODEL NUMBERS.
36--
37--     REPEAT FOR MINIMUM REQUIRED WORD LENGTHS OF 12, 16, 32 AND 48,
38--     WITH RANGE <, =, AND > THAN 1.0 AND
39--     WITH DELTA <, =, AND > THAN 1.0.
40
41-- HISTORY:
42--     NTW 09/08/86 CREATED ORIGINAL TEST.
43--     RJW 11/05/86 REVISED COMMENTS.
44--     DHH 01/13/88 ADDED APPLICABILITY CRITERIA AND STANDARD HEADER.
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 C45532H IS
51
52     USE REPORT;
53
54     MIN_WORD_LENGTH : CONSTANT := 16;
55     FULL_SCALE      : CONSTANT := 2 ** (MIN_WORD_LENGTH - 1);
56     A_THIRD         : CONSTANT := FULL_SCALE / 3;
57     RNG1            : CONSTANT := FULL_SCALE * 0.5;
58     TYPE FX_0P5  IS DELTA 0.5 RANGE -RNG1 * 1 .. RNG1 * 1 - 0.5;
59     TYPE FX_1    IS DELTA 1.0 RANGE -RNG1 * 2 .. RNG1 * 2 - 1.0;
60     TYPE FX_RNG1 IS DELTA RNG1
61                    RANGE -RNG1 * FULL_SCALE .. RNG1 * (FULL_SCALE - 1);
62
63BEGIN TEST ("C45532H", "FIXED POINT OPERATOR ""/""" );
64
65     --------------------------------------------------
66
67     -- CASE A) THE OPERATOR /, A, B, AND A / B ALL MODEL NUMBERS.
68
69A:   DECLARE
70          A              : FX_RNG1 := 0.0;
71          B              : FX_0P5  := 0.0;
72          RESULT_VALUE   : FX_0P5  := 0.0;
73          LOWEST_ACCEPTABLE_VALUE  : FX_0P5 := FX_0P5 (RNG1 / 2);
74          HIGHEST_ACCEPTABLE_VALUE : FX_0P5 := FX_0P5 (RNG1 / 2);
75     BEGIN
76          IF EQUAL (3, 3) THEN
77               A := FX_RNG1 (RNG1 * RNG1 / 4);    -- A MODEL NUMBER
78               B := FX_0P5  (RNG1 / 2);           -- A MODEL NUMBER
79          END IF;
80
81          RESULT_VALUE := FX_0P5 (A / B);
82
83          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
84             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
85               FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
86                    &  "WHEN A, B, AND A / B ARE ALL MODEL NUMBERS");
87          END IF;
88     END A;
89
90     --------------------------------------------------
91
92     -- CASE B) THE OPERATOR /, A, B MODEL NUMBERS A / B NOT.
93
94B:   DECLARE
95          A              : FX_RNG1 := 0.0;
96          B              : FX_1    := 0.0;
97          RESULT_VALUE   : FX_0P5  := 0.0;
98          LOWEST_ACCEPTABLE_VALUE  :  FX_0P5
99                                   := FX_0P5 (0.5 * A_THIRD);
100          HIGHEST_ACCEPTABLE_VALUE :  FX_0P5
101                                   := FX_0P5 (0.5 * (A_THIRD + 1) );
102     BEGIN
103          IF EQUAL (3, 3) THEN
104               A := FX_RNG1 (RNG1);               -- A MODEL NUMBER
105               B := FX_1    (3.0);                -- A MODEL NUMBER
106          END IF;
107
108          RESULT_VALUE := FX_0P5 (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_RNG1 := 0.0;
123          B              : FX_1    := 0.0;
124          RESULT_VALUE   : FX_1    := 0.0;
125          LOWEST_ACCEPTABLE_VALUE  :  FX_1
126                                   := FX_1 ( RNG1 - 3.0);
127          HIGHEST_ACCEPTABLE_VALUE :  FX_1
128                                   := FX_1 ( RNG1 + 4.0);
129     BEGIN
130          IF EQUAL (3, 3) THEN
131               A := FX_RNG1 (RNG1 * RNG1 / 3);    -- NOT A MODEL NUMBER
132               B := FX_1    (RNG1 / 3);           -- NOT A MODEL NUMBER
133          END IF;
134
135          RESULT_VALUE := FX_1 (A / B);
136
137          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
138             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
139               FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
140                    &  "WHEN USING NO MODEL NUMBERS");
141          END IF;
142     END C;
143
144     --------------------------------------------------
145
146
147     RESULT;
148
149END C45532H;
150