1-- C45532G.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 C45532G IS
51
52     USE REPORT;
53
54     MIN_WORD_LENGTH : CONSTANT := 16;
55     FULL_SCALE      : CONSTANT := 2 ** (MIN_WORD_LENGTH - 1);
56     FORTH           : CONSTANT := FULL_SCALE / 4;
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 ("C45532G", "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_0P5  := 0.0;
71          B              : FX_1    := 0.0;
72          RESULT_VALUE   : FX_RNG1 := 0.0;
73          LOWEST_ACCEPTABLE_VALUE
74                         : FX_RNG1 := FX_RNG1 (RNG1 * RNG1 / 4);
75          HIGHEST_ACCEPTABLE_VALUE
76                         : FX_RNG1 := FX_RNG1 (RNG1 * RNG1 / 4);
77     BEGIN
78          IF EQUAL (3, 3) THEN
79               A := FX_0P5 (RNG1 / 2);            -- A MODEL NUMBER
80               B := FX_1   (RNG1 / 2);            -- A MODEL NUMBER
81          END IF;
82
83          RESULT_VALUE := FX_RNG1 (A * B);
84
85          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
86             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
87               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
88                    &  "WHEN A, B, AND A * B ARE ALL MODEL NUMBERS");
89          END IF;
90     END A;
91
92     --------------------------------------------------
93
94     -- CASE B) THE OPERATOR *, A, B MODEL NUMBERS A * B NOT.
95
96B:   DECLARE
97          A              : FX_0P5  := 0.0;
98          B              : FX_0P5  := 0.0;
99          RESULT_VALUE   : FX_RNG1 := 0.0;
100          LOW_COUNT     : CONSTANT := FULL_SCALE / 16;
101          HIGH_COUNT    : CONSTANT := LOW_COUNT + 1;
102          LOWEST_ACCEPTABLE_VALUE  :  FX_RNG1
103                                   := FX_RNG1 (RNG1 * LOW_COUNT);
104          HIGHEST_ACCEPTABLE_VALUE :  FX_RNG1
105                                   := FX_RNG1 (RNG1 * HIGH_COUNT);
106     BEGIN
107          IF EQUAL (3, 3) THEN
108               A := FX_0P5 (0.5 * (FORTH + 1) );  -- A MODEL NUMBER
109               B := FX_0P5 (0.5 * (FORTH * 2) );  -- A MODEL NUMBER
110          END IF;
111
112          RESULT_VALUE := FX_RNG1 (A * B);
113
114          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
115             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
116               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
117                    &  "WHEN A, B MODEL NUMBERS A * B NOT");
118          END IF;
119     END B;
120
121     --------------------------------------------------
122
123     -- CASE C) THE OPERATOR *, USING NO MODEL NUMBERS
124
125C:   DECLARE
126          A              : FX_1    := 0.0;
127          B              : FX_1    := 0.0;
128          RESULT_VALUE   : FX_RNG1    := 0.0;
129          LOW_COUNT     : CONSTANT := FULL_SCALE / 32 - 1;
130          HIGH_COUNT    : CONSTANT := FULL_SCALE / 32 + 1;
131          LOWEST_ACCEPTABLE_VALUE  :  FX_RNG1
132                                   := FX_RNG1 (RNG1 * LOW_COUNT);
133          HIGHEST_ACCEPTABLE_VALUE :  FX_RNG1
134                                   := FX_RNG1 (RNG1 * HIGH_COUNT);
135     BEGIN
136          IF EQUAL (3, 3) THEN
137               A := FX_1 (0.5 * (FORTH + 1) );    -- NOT MODEL NUMBER
138               B := FX_1 (0.5 * (FORTH - 1) );    -- NOT MODEL NUMBER
139          END IF;
140
141          RESULT_VALUE := FX_RNG1 (A * B);
142
143          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
144             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
145               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
146                    &  "WHEN USING NO MODEL NUMBERS");
147          END IF;
148     END C;
149
150     --------------------------------------------------
151
152
153     RESULT;
154
155END C45532G;
156