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From: ForthNet@willett.pgh.pa.us (ForthNet articles from GEnie)
Newsgroups: comp.lang.forth
Subject: ANS FORTH TECHNICAL COMMITTEE
Message-ID: <1614.UUL1.3#5129@willett.pgh.pa.us>
Date: 27 Aug 90 03:30:54 GMT
Organization: String, Scotch tape, and Paperclips.  (in Pgh, PA)
Lines: 68


 Date: 08-23-90 (08:20)              Number: 463 (Echo)
   To: ALL                           Refer#: NONE
 From: JACK BROWN                      Read: (N/A)
 Subj: X2J14 MEETING 13              Status: PUBLIC MESSAGE

 The following proposal has been passed by both the X3J14 TSC and TC at
 the Vancouver Meeting to remove the floating-point stack burning issue.
 Proposal TP90-729 "Remove Floating-Point Stack" was failed by TSC and
 TC.

 +------------------------------------------------------+---------------+
 |  ANSI X3J14 Forth Technical Proposal                 |Page 1  of 2   |
 +------------------------------------------------------+---------------+
 |  Title:  Keep Floating-Point Stack                                   |
 |----------------------------------------------------------------------+
 |  Related Proposals: TP90-729 (Remove Floating-Point Stack)           |
 +------------------------------------------------------+---------------+
 |  Keyword(s):  floating-point stack ,                 |Proposal ( x ) |
 |    floating-point number ,  floating-point format    |Comment  (   ) |
 +------------------------------------------------------+---------------+
 |  Forth Word(s):  FDEPTH  ENVIRONMENT?                                |
 |                                                                      |
 +----------------------------------------------------------------------+
 |  Abstract:  Allow  ANS Forth systems that include the Floating-Point |
 |  Word Set to keep floating-point numbers on either the data stack    |
 |  or a separate floating-point stack.                                 | 
 +----------------------------------------------------------------------+
 |  Proposal:                                                           |
 |  1) Change all occurances of the phrase "floating point"             |
 |     in the document to "floating-point" and make terms               |
 |     "floating-point stack" , "floating-point number" ,               |
 |     "floating-point format"  ,  "floating-point equality"            |
 |     "floating-point package" ,  "floating-point value"  and          |
 |      floating-point search terms for the concordance.                |
 |  2) Add the following entry to the attribute list of                 |
 |     7.1345  ENVIRONMENT?                                             |
 |    Name          Type    Interpretation                              |
 |       --------------------------------------------------------       |
 |  FLOATING-STACK   n      if n=0 floating-point numbers are kept on   |
 |                          the data stack, otherwise n is the maximum  |
 |                          depth of the separate floating-point stack  |
 |  3) Change 4.0410 floating-point stack to:                           |
 |     A last in, first out list that is used by all floating-point     |
 |     operators.  The width of the floating-point stack is             |
 |     implementation-defined.                                          |
 |     By default the floating-point stack is separate from the data    |
 |     and the return stacks.  A program can determine whether floating-|
 |     point numbers are kept on the data stack by passing the string   |
 |     " FLOATING-STACK" to  ENVIRONMENT? .                             |
 |                                                                      |
 |  4) Change 7.1497  FDEPTH  description to:                           |
 |     +n is the current number of floating-point values contained      |
 |     on the default separate floating-point stack. If floating        |
 |     point numbers are kept on the data stack  +n is the current      |
 |     number of possible  floating-point values contained on the data  |
 |     stack.                                                           |
 |  5) Add to 6.8.1  Stack Parameter Abbreviations                      |
 |                                                                      |
 |  Stack Abbr   Number Type  Range in Dec   Size on Stack  Size in Mem |
 |     r       floating-point impl-defined   impl-defined   impl-defined|
 |             number                                                   |
 |  ( continued )           

 NET/Mail : British Columbia Forth Board - Burnaby BC - (604)434-5886   
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