Gary, As Gary Peskin and Tony Harminc have pointed out, the sequence of bits is the same, and the 'value' is the same too.
Please see my prior email with examples to validate that the value 7 encoded in either LUV or RUV eventually ends up having the exact same sequence of bits. Which underscores that the view chosen is no more than an aid in understanding the numbers your program is using. As I've come to understand, it makes no sense to have an option to request LUV or RUV since the bit sequence would be the very same. And no, RUV/LUV is not an HLL thingy. It is an additional layer of complexity added into the PoP to confuse us mere mortals :-) Kind regards & Happy programming! Abe === Op 06/03/2024 om 19:02 schreef Gary Weinhold: > This reminds me in a way of number representation in COBOL. The PICTURE > allows you to place the implicit decimal point anywhere, which will afftect > the display of the number, but internally there is just a fullword, or packed > decimal or halfward, etc. So the programmer choses whether to display, for > example, $12345.67 (dollars and cents) or 1234567 pennies or 12.3 Thousands > of dollars. > > Where do you get to indicate whether you want LUV or RUV? Is it part of the > convert to zoned decimal or is it an convention that an application agrees > on? I can see what it is but I can't see how I can request one or the other > in assemlber language. Or is an HLL concept that some asembler subroutine > implements for the HLL? > > > > > Gary Weinhold > Senior Application Architect > DATAKINETICS | Data Performance & Optimization > Phone:+1.613.523.5500 x216 > Email: weinh...@dkl.com > Visit us online at www.DKL.com > E-mail Notification: The information contained in this email and any > attachments is confidential and may be subject to copyright or other > intellectual property protection. If you are not the intended recipient, you > are not authorized to use or disclose this information, and we request that > you notify us by reply mail or telephone and delete the original message from > your mail system. > > > ________________________________ > From: IBM Mainframe Assembler List <ASSEMBLER-LIST@LISTSERV.UGA.EDU> on > behalf of Gary L Peskin <ga...@firstech.com> > Sent: March 6, 2024 11:30 > To: ASSEMBLER-LIST@LISTSERV.UGA.EDU <ASSEMBLER-LIST@LISTSERV.UGA.EDU> > Subject: Re: Decimal Floating Point Numbers > > Thanks, Abe. I'm glad I was able to help. I don't really understand why they > started with this whole LUV/RUV thing anyway. They could have just picked one > and said that that's the representation and left it at that (no pun > intended!). But I guess that wouldn't have been confusing enough. > > Take care, > Gary
