1-- C45532L.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 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
49
50WITH REPORT;
51PROCEDURE C45532L IS
52
53     USE REPORT;
54
55     MIN_WORD_LENGTH : CONSTANT := 32;
56     FULL_SCALE      : CONSTANT := 2 ** (MIN_WORD_LENGTH - 1);
57     A_THIRD         : CONSTANT := FULL_SCALE / 3;
58     RNG1            : CONSTANT := FULL_SCALE * 0.5;
59     TYPE FX_0P5  IS DELTA 0.5 RANGE -RNG1 * 1 .. RNG1 * 1 - 0.5;
60     TYPE FX_1    IS DELTA 1.0 RANGE -RNG1 * 2 .. RNG1 * 2 - 1.0;
61     TYPE FX_RNG1 IS DELTA RNG1
62                    RANGE -RNG1 * FULL_SCALE .. RNG1 * (FULL_SCALE - 1);
63
64BEGIN TEST ("C45532L", "FIXED POINT OPERATOR ""/""" );
65
66     --------------------------------------------------
67
68     -- CASE A) THE OPERATOR /, A, B, AND A / B ALL MODEL NUMBERS.
69
70A:   DECLARE
71          A              : FX_RNG1 := 0.0;
72          B              : FX_0P5  := 0.0;
73          RESULT_VALUE   : FX_0P5  := 0.0;
74          LOWEST_ACCEPTABLE_VALUE  : FX_0P5 := FX_0P5 (RNG1 / 2);
75          HIGHEST_ACCEPTABLE_VALUE : FX_0P5 := FX_0P5 (RNG1 / 2);
76     BEGIN
77          IF EQUAL (3, 3) THEN
78               A := FX_RNG1 (RNG1 * RNG1 / 4);    -- A MODEL NUMBER
79               B := FX_0P5  (RNG1 / 2);           -- A MODEL NUMBER
80          END IF;
81
82          RESULT_VALUE := FX_0P5 (A / B);
83
84          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
85             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
86               FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
87                    &  "WHEN A, B, AND A / B ARE ALL MODEL NUMBERS");
88          END IF;
89     END A;
90
91     --------------------------------------------------
92
93     -- CASE B) THE OPERATOR /, A, B MODEL NUMBERS A / B NOT.
94
95B:   DECLARE
96          A              : FX_RNG1 := 0.0;
97          B              : FX_1    := 0.0;
98          RESULT_VALUE   : FX_0P5  := 0.0;
99          LOWEST_ACCEPTABLE_VALUE  :  FX_0P5
100                                   := FX_0P5 (0.5 * A_THIRD);
101          HIGHEST_ACCEPTABLE_VALUE :  FX_0P5
102                                   := FX_0P5 (0.5 * (A_THIRD + 1) );
103     BEGIN
104          IF EQUAL (3, 3) THEN
105               A := FX_RNG1 (RNG1);               -- A MODEL NUMBER
106               B := FX_1    (3.0);                -- A MODEL NUMBER
107          END IF;
108
109          RESULT_VALUE := FX_0P5 (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_RNG1 := 0.0;
124          B              : FX_1    := 0.0;
125          RESULT_VALUE   : FX_1    := 0.0;
126          LOWEST_ACCEPTABLE_VALUE  :  FX_1
127                                   := FX_1 ( RNG1 - 3.0);
128          HIGHEST_ACCEPTABLE_VALUE :  FX_1
129                                   := FX_1 ( RNG1 + 4.0);
130     BEGIN
131          IF EQUAL (3, 3) THEN
132               A := FX_RNG1 (RNG1 * RNG1 / 3);    -- NOT A MODEL NUMBER
133               B := FX_1    (RNG1 / 3);           -- NOT A MODEL NUMBER
134          END IF;
135
136          RESULT_VALUE := FX_1 (A / B);
137
138          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
139             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
140               FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
141                    &  "WHEN USING NO MODEL NUMBERS");
142          END IF;
143     END C;
144
145     --------------------------------------------------
146
147
148     RESULT;
149
150END C45532L;
151