Subversion Repositories openrisc_2011-10-31

-- C45531N.DEP

--                             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 MIXED FIXED POINT AND INTEGER TYPES USING 3 SUBTESTS.

--       THIS TEST REQUIRES MIN_WORD_LENGTH = 48.

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

--

--     TEST CASES ARE:

--       A) FIXED / INTEGER WHEN ALL VALUES ARE MODEL NUMBERS.

--       B) FIXED / INTEGER WITH NUMERATOR MODEL NUMBER AND RESULT NOT.

--       C) FIXED / INTEGER FOR NON-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.

-- APPLICABILITY CRITERIA:

--     THIS TEST IS APPLICABLE FOR IMPLEMENTATIONS WHICH HAVE A

--     'MAX_MANTISSA OF 47 OR GREATER.

--     IF 'MAX_MANTISSA >= 47 IS NOT SUPPORTED THEN THE DECLARATION OF

--     'TYPE FX_OP5' MUST BE REJECTED.

-- HISTORY:

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

--     RJW 11/05/86 REVISED COMMENTS.

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

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

WITH REPORT;

PROCEDURE C45531N IS

     USE REPORT;

     MIN_WORD_LENGTH : CONSTANT := 48;

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

     FORTH           : CONSTANT := FULL_SCALE / 4;

     DEL1            : CONSTANT := 0.5 / FULL_SCALE;

     DEL2            : CONSTANT := 2.0 * DEL1;

     DEL4            : CONSTANT := 4.0 * DEL1;

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

                                                        -- N/A => ERROR.

     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 ("C45531N", "MIXED FIXED POINT AND INTEGER ""/"" "

                     & "FOR RANGE <, =, > 1.0");

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

     -- CASE A) FIXED / INTEGER WHEN ALL VALUES ARE MODEL NUMBERS.

A:   DECLARE

          A              : FX_0P5  := 0.0;

          B              : INTEGER := 0;

          RESULT_VALUE   : FX_0P5  := 0.0;

          LOWEST_ACCEPTABLE_VALUE  : FX_0P5 := FX_0P5 (3 * DEL1);

          HIGHEST_ACCEPTABLE_VALUE : FX_0P5 := FX_0P5 (3 * DEL1);

     BEGIN

          IF EQUAL (3, 3) THEN

               A := FX_0P5 (15 * DEL1);           -- A MODEL NUMBER

               B := 5;

          END IF;

          RESULT_VALUE := A / B;

          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)

             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN

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

                    &  "FOR FIXED / INTEGER "

                    &  "WHEN ALL VALUES ARE MODEL NUMBERS");

          END IF;

     END A;

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

     -- CASE B) FIXED / INTEGER WITH NUMERATOR MODEL NUMBER, RESULT NOT

B:   DECLARE

          A              : FX_1    := 0.0;

          B              : INTEGER := 0;

          RESULT_VALUE   : FX_1    := 0.0;

          LOWEST_ACCEPTABLE_VALUE  :  FX_1

                                   := FX_1 (DEL2 * FORTH );

          HIGHEST_ACCEPTABLE_VALUE :  FX_1

                                   := FX_1 (DEL2 * (FORTH + 1) );

     BEGIN

          IF EQUAL (3, 3) THEN                    -- A IS A MODEL NUMBER

               A := FX_1 (DEL2 * (3 * FORTH + 1) );

               B := 3;

          END IF;

          RESULT_VALUE := A / B;

          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)

             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN

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

                    &  "FOR FIXED / INTEGER WITH NUMERATOR MODEL "

                    &  "NUMBER, RESULT NOT");

          END IF;

     END B;

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

     -- CASE C) FIXED / INTEGER FOR NON-MODEL NUMBERS

C:   DECLARE

          A              : FX_2    := 0.0;

          B              : INTEGER := 0;

          RESULT_VALUE   : FX_2    := 0.0;

          LOWEST_ACCEPTABLE_VALUE  :  FX_2

                                   := FX_2 (DEL4 * FORTH );

          HIGHEST_ACCEPTABLE_VALUE :  FX_2

                                   := FX_2 (DEL4 * (FORTH + 1) );

     BEGIN

          IF EQUAL (3, 3) THEN                    -- A NOT MODEL NUMBER

               A := FX_2 (3 * (DEL4 * FORTH + DEL1) );

               B := 3;

          END IF;

          RESULT_VALUE := A / B;

          IF    (RESULT_VALUE < LOWEST_ACCEPTABLE_VALUE)

             OR (RESULT_VALUE > HIGHEST_ACCEPTABLE_VALUE) THEN

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

                    &  "FOR FIXED / INTEGER FOR NON-MODEL NUMBERS");

          END IF;

     END C;

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

     RESULT;

END C45531N;