3 -- Grant of Unlimited Rights
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
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.
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.
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.
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.
40 -- APPLICABILITY CRITERIA:
41 -- THIS TEST IS APPLICABLE FOR IMPLEMENTATIONS WHICH HAVE A
42 -- 'MAX_MANTISSA OF 47 OR GREATER.
44 -- IF 'MAX_MANTISSA >= 47 IS NOT SUPPORTED THEN THE DECLARATION OF
45 -- 'TYPE FX_OP5' MUST BE REJECTED.
49 -- NTW 09/08/86 CREATED ORIGINAL TEST.
50 -- RJW 11/05/86 REVISED COMMENTS.
51 -- DHH 10/19/87 SHORTENED LINES CONTAINING MORE THAN 72 CHARACTERS.
52 -- RDH 04/27/90 REVISED APPLICABILITY CRITERIA.
59 MIN_WORD_LENGTH : CONSTANT := 48; -- MUST BE EVEN & >= 6
60 FULL_SCALE : CONSTANT := 2 ** (MIN_WORD_LENGTH - 1);
61 FORTH : CONSTANT := FULL_SCALE / 4;
62 A_THIRD : CONSTANT := FULL_SCALE / 3;
63 DEL1 : CONSTANT := 0.5 / FULL_SCALE;
64 TYPE FX_0P5 IS DELTA DEL1 * 1 RANGE -0.5 ..
65 0.5 - DEL1 * 1; -- N/A => ERROR.
66 TYPE FX_1 IS DELTA DEL1 * 2 RANGE -1.0 ..
67 1.0 - DEL1 * 2; -- N/A => ERROR.
68 TYPE FX_2 IS DELTA DEL1 * 4 RANGE -2.0 ..
69 2.0 - DEL1 * 4; -- N/A => ERROR.
71 BEGIN TEST ("C45532N", "FIXED POINT OPERATOR ""/""" );
73 --------------------------------------------------
75 -- CASE A) THE OPERATOR /, A, B, AND A / B ALL MODEL NUMBERS.
80 RESULT_VALUE : FX_2 := 0.0;
81 LOWEST_ACCEPTABLE_VALUE : FX_2 := FX_2 (0.5);
82 HIGHEST_ACCEPTABLE_VALUE : FX_2 := FX_2 (0.5);
85 A := FX_0P5 (0.125); -- A MODEL NUMBER
86 B := FX_1 (0.25); -- A MODEL NUMBER
89 RESULT_VALUE := FX_2 (A / B);
91 IF (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
92 OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
93 FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
94 & "WHEN A, B, AND A / B ARE ALL MODEL NUMBERS");
98 --------------------------------------------------
100 -- CASE B) THE OPERATOR /, A, B MODEL NUMBERS A / B NOT.
105 RESULT_VALUE : FX_1 := 0.0;
106 LOWEST_ACCEPTABLE_VALUE : FX_1
107 := FX_1 (2 * DEL1 * A_THIRD);
108 HIGHEST_ACCEPTABLE_VALUE : FX_1
109 := FX_1 (2 * DEL1 * (A_THIRD + 1) );
112 A := FX_0P5 (DEL1 * 1); -- A MODEL NUMBER
113 B := FX_0P5 (DEL1 * 3); -- A MODEL NUMBER
116 RESULT_VALUE := FX_1 (A / B);
118 IF (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
119 OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
120 FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
121 & "WHEN A, B MODEL NUMBERS A / B NOT");
125 --------------------------------------------------
127 -- CASE C) THE OPERATOR /, USING NO MODEL NUMBERS
132 RESULT_VALUE : FX_0P5 := 0.0;
133 LOW_COUNT : CONSTANT := 2 * A_THIRD;
134 -- := (2 * FULL_SCALE * (2 * FORTH + 0))
135 -- / (6 * FORTH + 2);
136 HIGH_COUNT : CONSTANT := 2 * A_THIRD + 4;
137 -- := (2 * FULL_SCALE * (2 * FORTH + 2))
138 -- / (6 * FORTH + 0);
139 LOWEST_ACCEPTABLE_VALUE : FX_0P5
140 := FX_0P5 (DEL1 * LOW_COUNT );
141 HIGHEST_ACCEPTABLE_VALUE : FX_0P5
142 := FX_0P5 (DEL1 * HIGH_COUNT );
144 IF EQUAL (3, 3) THEN -- A AND B NOT MODEL NUMBERS
145 A := FX_1 (DEL1 * (2 * FORTH + 1));
146 B := FX_1 (DEL1 * (6 * FORTH + 1));
149 RESULT_VALUE := FX_0P5 (A / B);
151 IF (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)
152 OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN
153 FAILED ("RESULT OF ""/"" OUTSIDE RESULT MODEL INTERVAL "
154 & "WHEN USING NO MODEL NUMBERS");
158 --------------------------------------------------