How do I coding assembly code for hex data calculate.

Mansik Kim · New User Joined: 15 Dec 2006 Posts: 29 Location: Korea

Hi All,

I am working SMF read program in assembly.

There was changed hex data length from 4 byte to 8 byte.

So, I need to change my program code for calculate logic.

Please let me have a good samples.

The following code is current and changed code.

Thanks,
Mansik.

========================================
The current program code
========================================

Bill O'Boyle · Posted: Fri Dec 27, 2013 3:54 pm

What's the hex-format of the date? Please provide an example and then we'll go from there.

steve-myers · Posted: Fri Dec 27, 2013 4:25 pm

Bill, the date in SMF is always PL4'0cyyddd' The sign is usually X'F'.

In the last couple of years I've written a lot of Assembler code to read SMF data, but I don't have a clue what the TS is trying to accomplish. The MVC OR1101,0(R6) is likely going to get random S0C4s. If the revised DISPT is supposed to represent the SMF record time and date rather than the date the code is going to get S0C7s as the time is binary time of day in 1/100th seconds. It appears the TS has no clue how to process SMF data.

steve-myers · Posted: Fri Dec 27, 2013 5:07 pm

This is more correct. Notice the only arithmetic is compares.

Bill O'Boyle · Posted: Fri Dec 27, 2013 5:28 pm

Steve,

I wasn't 100% sure of the date-format and this is why I had asked.

I'm still hoping the TS will post the new 8-Byte format, (rather than taking a SWAG), so that we'll know for sure, even though it's in an SMF record.

Requests such as this have a tendency to completely change.

All we can do now is wait.

But, after re-reading the post, I have a question for the TS - IS THIS A DATE OR DATA?

Please advise....

Bill O'Boyle · Posted: Fri Dec 27, 2013 8:14 pm

Let's assume at 0(R6), there's 8-Bytes of valid hex-data, which we need to convert to packed-decimal -

steve-myers · Posted: Sat Dec 28, 2013 1:34 am

Bill, actually I think this is what you want.

Bill O'Boyle · Posted: Sat Dec 28, 2013 2:08 am

Steve,

I'm not sure what the TS wants, so I took a SWAG, because I still don't know if it's a DATE or DATA he's after and whether he needs to convert the 8-Bytes of Hex into 16-Bytes of Character or convert the 8-Bytes to Packed-Decimal.

I guess our replies are not that critical because I haven't heard from the TS.

The drama continues....

Mansik Kim · New User Joined: 15 Dec 2006 Posts: 29 Location: Korea

Hi all,

I was already have a SMF read program.
I can read SMF data from assembly include date, time format.

I want to know that 8 byte hex data addition calculate method.

Please let me have a good samples.

Thanks,
Mansik.

steve-myers · Posted: Sat Dec 28, 2013 9:32 am

dick scherrer · Posted: Sun Dec 29, 2013 10:20 pm

Hello,

You might consider writing the data arithmetic operations in a COBOL module and then invoke it. COBOL has far more tools to work with dates than does assembler.

enrico-sorichetti · Posted: Mon Dec 30, 2013 4:42 am

we are getting nowhere
data/date misunderstanding ...
the TS talks about 8 bytes hex data, but the coded samples show 8 bytes PACKED data
???
best thing would be for the TS to tell the SMF record type and the field/variable name
that he is trying to process

steve-myers · Posted: Mon Dec 30, 2013 6:58 am

Enrico - I agree. If the little sample he gave us is any indication of his real code, he has lots of problems. About the only thing he gave us that is correct is the GET macro - assuming the DCB specifies MACRF=GL,BFTEK=A, which he did not show us.

Spring 2013 I think it was I wrote code to compute elapsed time given an SMF record time and a start time in SMF time of day and date format. The code works, but it is very rough - not something I'd share. I just wrote the equivalent as a closed subroutine, but as I write this it's not working, and even when I get it to work I'm not sure I'd want to share it.

Mansik Kim · New User Joined: 15 Dec 2006 Posts: 29 Location: Korea

Bill O'Boyle · Posted: Mon Dec 30, 2013 7:26 am

Mansik,

LG and CVDG are two of the many 64-Bit instructions (known as Grande), introduced with HLASM and POPS well over 10 years ago.

The z/OS Principles of Operation manual (The Bible for Assembler programmers) defines these instructions and many others, extensively.

z/OS 1.13 POPS Manual (PDF format) -

publibfi.boulder.ibm.com/epubs/pdf/dz9zr008.pdf

It's around 35MB, so if you have a slow connection, begin the download and go get some breakfast

You can also Google these instructions as well....

HTH....

Mansik Kim · New User Joined: 15 Dec 2006 Posts: 29 Location: Korea

Hi Bill,

Thank you for your answer.

I got you upload manual and I try it.

Thanks,
Mansik.

steve-myers · Posted: Mon Dec 30, 2013 12:01 pm

Bill: the topic starter is leading you down a false trail. The topic starter seems to be convinced the 8 byte data area defined by SMFRTME and SMFRDTE in my first post in this thread is an 8 byte packed decimal data area. This is not true. The first 4 bytes are binary data that represents the time of day in 1/100th of a second from midnight. The second 4 bytes are a date, as a packed decimal number with digits containing PL4'0cyyddd' where c is a century indicator, 0 for 1900 through 1999, and 1 for 2000 through 2099, yy is the year in the century, and ddd is the day of the year, from 001 through 365 or 366 in leap years.

Performing LG/CVDG will work, but the result of the CVDG, for all intents and purposes, will be garbage.

PeterHolland · Posted: Mon Dec 30, 2013 4:30 pm

Bill, Steve I didn't see the TS talking about DATE but about DATA.
Even the titel of this topic is : How do I coding assembly code for hex DATA calculation.

In his poor coding example even the the DISPT field is hanging around.

So before you put any effort in this crappy topic, the TS has to do better with explaining which fields from what SMF records he/she wants to process.

steve-myers · Posted: Mon Dec 30, 2013 5:03 pm

Peter. Agreed. I'm not going to comment any more until this Mansik Kim defines his input correctly.

Mansik Kim · New User Joined: 15 Dec 2006 Posts: 29 Location: Korea

Hi Bill,

I did completed asembly code and SMF data read test successfull.

Thank you for your answer.

Mansik.

Mansik Kim · New User Joined: 15 Dec 2006 Posts: 29 Location: Korea

Hi Bill,

I have more question.

How can I post assem code witch display 3270 screen mode.

Please let me know.

Thanks,
Mansik.

dick scherrer · Posted: Thu Jan 02, 2014 7:07 pm

Hello,

This question is not clear. . .

Do you mean you want to show some of your code from am edit/view screen?

If yes, copy/paste the screen data and paste into your reply here. Then apply the Code Tag to improve readabilit and preserve alignment.

If this is not what you mean, please clarify.

steve-myers · Posted: Thu Jan 02, 2014 11:00 pm

When you specify "code" brackets, you click on the code block just above the reply area. You will see a left square bracket code code right square bracket in the reply area. Enter the text you want displayed and then type left square bracket /code right square bracket.

Nic Clouston · Posted: Thu Jan 02, 2014 11:07 pm

Note that the Code button is not available with the Quick Reply editor so you need to click on Preview and that will do it.

You can also selct the text to be "coded" and then click the Code button and it will insert start and end tags.

Terry Heinze · Posted: Thu Jan 02, 2014 11:25 pm