Re: IBM and float decimal

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#356

From: glen herrmannsfeldt
Date: Mon, 19 Sep 2005 22:17

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Ray Mullins <mrm@lerctr.org> wrote:

(regarding float decimal)
> Actually, since this came out at the Futures session at
> the DB2 Tech Conference last week, I can now bring it up.

> DB2 V9 will support two new data types:  NUMERIC(16) and
> NUMERIC(34), which is probably this format.

That is 16 and 34 decimal digits?  16 would use 5*10+4 bits
for fraction, leaving 9 for exponent and one for sign.
The base 10 exponent would be about +/-255.
34 would be 11*10+4, 114 for fraction leaving 13 for
exponent and one for sign.

So no 32 bit type?

Are there just not enough bits to make it worthwhile?

> As I joked to one of my friends off-list, maybe now PL/I can finally
> differentiate between FLOAT DECIMAL and FLOAT BINARY.  :-)

Yes, that is what has been discussed in various newsgroup,
including comp.lang.fortran, wondering about the Fortran support
for it.

-- glen

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From: glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups: bit.listserv.asm370
Subject: Re: IBM and float decimal
Date: Mon, 19 Sep 2005 15:17:26 -0700
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