Subversion Repositories openrisc_2011-10-31

-- C45532E.ADA

--                             Grant of Unlimited Rights

--

--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,

--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained 

--     unlimited rights in the software and documentation contained herein.

--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making 

--     this public release, the Government intends to confer upon all 

--     recipients unlimited rights  equal to those held by the Government.  

--     These rights include rights to use, duplicate, release or disclose the 

--     released technical data and computer software in whole or in part, in 

--     any manner and for any purpose whatsoever, and to have or permit others 

--     to do so.

--

--                                    DISCLAIMER

--

--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR

--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 

--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE

--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 

--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A

--     PARTICULAR PURPOSE OF SAID MATERIAL.

--*

-- OBJECTIVE:

--     CHECK THAT THE OPERATOR "*" PRODUCES CORRECT RESULTS

--     FOR FIXED POINT TYPES USING 3 SUBTESTS.

--       THIS TEST REQUIRES MIN_WORD_LENGTH = 16.

--       THIS TEST USES VALUES OF DELTA WHICH ARE LESS THAN 0.5.

--

--     TEST CASES ARE:

--       A) THE OPERATOR *, A, B, AND A * B ALL MODEL NUMBERS.

--       B) THE OPERATOR *, A, B MODEL NUMBERS A * B NOT.

--       C) THE OPERATOR *, USING NO MODEL NUMBERS.

--

--     REPEAT FOR MINIMUM REQUIRED WORD LENGTHS OF 12, 16, 32 AND 48,

--     WITH RANGE <, =, AND > THAN 1.0 AND

--     WITH DELTA <, =, AND > THAN 1.0.

-- HISTORY:

--     NTW 09/08/86 CREATED ORIGINAL TEST.

--     RJW 11/05/86 REVISED COMMENTS.

--     DHH 01/13/88 ADDED APPLICABILITY CRITERIA AND STANDARD HEADER.

--     RDH 04/27/90 REVISED APPLICABILITY CRITERIA.

--     BCB 10/03/90 REMOVED APPLICABILITY CRITERIA AND N/A => ERROR

--                  LINE.  CHANGED EXTENSION FROM '.DEP' TO '.ADA'.

WITH REPORT;

PROCEDURE C45532E IS

     USE REPORT;

     MIN_WORD_LENGTH : CONSTANT := 16;

     FULL_SCALE      : CONSTANT := 2 ** (MIN_WORD_LENGTH - 1);

     FORTH           : CONSTANT := FULL_SCALE / 4;

     DEL1            : CONSTANT := 0.5 / FULL_SCALE;

     TYPE FX_0P5 IS DELTA DEL1 * 1 RANGE -0.5 .. 0.5 - DEL1 * 1;

     TYPE FX_1   IS DELTA DEL1 * 2 RANGE -1.0 .. 1.0 - DEL1 * 2;

     TYPE FX_2   IS DELTA DEL1 * 4 RANGE -2.0 .. 2.0 - DEL1 * 4;

BEGIN TEST ("C45532E", "FIXED POINT OPERATOR ""*""" );

     --------------------------------------------------

     -- CASE A) THE OPERATOR *, A, B, AND A * B ALL MODEL NUMBERS.

A:   DECLARE

          A              : FX_0P5  := 0.0;

          B              : FX_2    := 0.0;

          RESULT_VALUE   : FX_1    := 0.0;

          LOWEST_ACCEPTABLE_VALUE  : FX_1 := FX_1 (0.125);

          HIGHEST_ACCEPTABLE_VALUE : FX_1 := FX_1 (0.125);

     BEGIN

          IF EQUAL (3, 3) THEN

               A := FX_0P5 (0.25);                -- A MODEL NUMBER

               B := FX_2   (0.50);                -- A MODEL NUMBER

          END IF;

          RESULT_VALUE := FX_1 (A * B);

          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)

             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN

               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "

                    &  "WHEN A, B, AND A * B ARE ALL MODEL NUMBERS");

          END IF;

     END A;

     --------------------------------------------------

     -- CASE B) THE OPERATOR *, A, B MODEL NUMBERS A * B NOT.

B:   DECLARE

          A              : FX_0P5  := 0.0;

          B              : FX_1    := 0.0;

          RESULT_VALUE   : FX_2    := 0.0;

          LOW_COUNT     : CONSTANT := FULL_SCALE / 64;

          HIGH_COUNT    : CONSTANT := LOW_COUNT + 1;

          LOWEST_ACCEPTABLE_VALUE  :  FX_2

                                   := FX_2 (4 * DEL1 * LOW_COUNT );

          HIGHEST_ACCEPTABLE_VALUE :  FX_2

                                   := FX_2 (4 * DEL1 * HIGH_COUNT);

     BEGIN

          IF EQUAL (3, 3) THEN

               A := FX_0P5 (DEL1 * (FORTH + 1) ); -- A MODEL NUMBER

               B := FX_1   (DEL1 * (FORTH * 2) ); -- A MODEL NUMBER

          END IF;

          RESULT_VALUE := FX_2 (A * B);

          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)

             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN

               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "

                    &  "WHEN A, B MODEL NUMBERS A * B NOT");

          END IF;

     END B;

     --------------------------------------------------

     -- CASE C) THE OPERATOR *, USING NO MODEL NUMBERS

C:   DECLARE

          A              : FX_1    := 0.0;

          B              : FX_1    := 0.0;

          RESULT_VALUE   : FX_2    := 0.0;

          LOW_COUNT     : CONSTANT := FULL_SCALE / 128 - 1;

          HIGH_COUNT    : CONSTANT := FULL_SCALE / 128 + 1;

          LOWEST_ACCEPTABLE_VALUE  :  FX_2

                                   := FX_2 (4 * DEL1 * LOW_COUNT );

          HIGHEST_ACCEPTABLE_VALUE :  FX_2

                                   := FX_2 (4 * DEL1 * HIGH_COUNT);

     BEGIN

          IF EQUAL (3, 3) THEN

               A := FX_1 (DEL1 * (FORTH + 1) );   -- NOT MODEL NUMBER

               B := FX_1 (DEL1 * (FORTH - 1) );   -- NOT MODEL NUMBER

          END IF;

          RESULT_VALUE := FX_2 (A * B);

          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)

             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN

               FAILED ("RESULT OF ""*"" OUTSIDE RESULT MODEL INTERVAL "

                    &  "WHEN USING NO MODEL NUMBERS");

          END IF;

     END C;

     --------------------------------------------------

     RESULT;

END C45532E;