1-- C45532M.DEP
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 = 48.
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-- APPLICABILITY CRITERIA:
41--     THIS TEST IS APPLICABLE FOR IMPLEMENTATIONS WHICH HAVE A
42--     'MAX_MANTISSA OF 47 OR GREATER.
43
44--     IF 'MAX_MANTISSA >= 47 IS NOT SUPPORTED THEN THE DECLARATION OF
45--     'TYPE FX_OP5' MUST BE REJECTED.
46
47-- HISTORY:
48--     NTW 09/08/86 CREATED ORIGINAL TEST.
49--     RJW 11/05/86 REVISED COMMENTS.
50--     DHH 01/13/88 ADDED APPLICABILITY CRITERIA AND STANDARD HEADER.
51--     RDH 04/27/90 REVISED APPLICABILITY CRITERIA.
52
53WITH REPORT;
54PROCEDURE C45532M IS
55
56     USE REPORT;
57
58     MIN_WORD_LENGTH : CONSTANT := 48;
59     FULL_SCALE      : CONSTANT := 2 ** (MIN_WORD_LENGTH - 1);
60     FORTH           : CONSTANT := FULL_SCALE / 4;
61     DEL1            : CONSTANT := 0.5 / FULL_SCALE;
62     TYPE FX_0P5 IS DELTA DEL1 * 1 RANGE -0.5 .. 0.5 - DEL1 * 1;
63                                                        -- N/A => ERROR.
64     TYPE FX_1   IS DELTA DEL1 * 2 RANGE -1.0 .. 1.0 - DEL1 * 2;
65     TYPE FX_2   IS DELTA DEL1 * 4 RANGE -2.0 .. 2.0 - DEL1 * 4;
66
67BEGIN TEST ("C45532M", "FIXED POINT OPERATOR ""*""" );
68
69     --------------------------------------------------
70
71     -- CASE A) THE OPERATOR *, A, B, AND A * B ALL MODEL NUMBERS.
72
73A:   DECLARE
74          A              : FX_0P5  := 0.0;
75          B              : FX_2    := 0.0;
76          RESULT_VALUE   : FX_1    := 0.0;
77          LOWEST_ACCEPTABLE_VALUE  : FX_1 := FX_1 (0.125);
78          HIGHEST_ACCEPTABLE_VALUE : FX_1 := FX_1 (0.125);
79     BEGIN
80          IF EQUAL (3, 3) THEN
81               A := FX_0P5 (0.25);                -- A MODEL NUMBER
82               B := FX_2   (0.50);                -- A MODEL NUMBER
83          END IF;
84
85          RESULT_VALUE := FX_1 (A * B);
86
87          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
88             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
89               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
90                    &  "WHEN A, B, AND A * B ARE ALL MODEL NUMBERS");
91          END IF;
92     END A;
93
94     --------------------------------------------------
95
96     -- CASE B) THE OPERATOR *, A, B MODEL NUMBERS A * B NOT.
97
98B:   DECLARE
99          A              : FX_0P5  := 0.0;
100          B              : FX_1    := 0.0;
101          RESULT_VALUE   : FX_2    := 0.0;
102          LOW_COUNT     : CONSTANT := FULL_SCALE / 64;
103          HIGH_COUNT    : CONSTANT := LOW_COUNT + 1;
104          LOWEST_ACCEPTABLE_VALUE  :  FX_2
105                                   := FX_2 (4 * DEL1 * LOW_COUNT );
106          HIGHEST_ACCEPTABLE_VALUE :  FX_2
107                                   := FX_2 (4 * DEL1 * HIGH_COUNT);
108     BEGIN
109          IF EQUAL (3, 3) THEN
110               A := FX_0P5 (DEL1 * (FORTH + 1) ); -- A MODEL NUMBER
111               B := FX_1   (DEL1 * (FORTH * 2) ); -- A MODEL NUMBER
112          END IF;
113
114          RESULT_VALUE := FX_2 (A * B);
115
116          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
117             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
118               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
119                    &  "WHEN A, B MODEL NUMBERS A * B NOT");
120          END IF;
121     END B;
122
123     --------------------------------------------------
124
125     -- CASE C) THE OPERATOR *, USING NO MODEL NUMBERS
126
127C:   DECLARE
128          A              : FX_1    := 0.0;
129          B              : FX_1    := 0.0;
130          RESULT_VALUE   : FX_2    := 0.0;
131          LOW_COUNT     : CONSTANT := FULL_SCALE / 128 - 1;
132          HIGH_COUNT    : CONSTANT := FULL_SCALE / 128 + 1;
133          LOWEST_ACCEPTABLE_VALUE  :  FX_2
134                                   := FX_2 (4 * DEL1 * LOW_COUNT );
135          HIGHEST_ACCEPTABLE_VALUE :  FX_2
136                                   := FX_2 (4 * DEL1 * HIGH_COUNT);
137     BEGIN
138          IF EQUAL (3, 3) THEN
139               A := FX_1 (DEL1 * (FORTH + 1) );   -- NOT MODEL NUMBER
140               B := FX_1 (DEL1 * (FORTH - 1) );   -- NOT MODEL NUMBER
141          END IF;
142
143          RESULT_VALUE := FX_2 (A * B);
144
145          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
146             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
147               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "
148                    &  "WHEN USING NO MODEL NUMBERS");
149          END IF;
150     END C;
151
152     --------------------------------------------------
153
154
155     RESULT;
156
157END C45532M;
158