TMLH Instruction in assembler

Harsh Pawar · New User Joined: 04 Jun 2008 Posts: 25 Location: Noida

I am not able to figure out what is TMLH instruction.
I know translate under mask (TM) and i know LH (Load Halfword).

Thanks for helping.

Regards,
Harry

enrico-sorichetti · Posted: Tue Dec 22, 2009 5:13 pm

the TMLH instruction does not exist...
see the
Enterprise Systems Architecture/390 IBM Principles of Operation
SA22-7201-08

chapter 7/page 130 for the different flavors of the TM instruction

You could have found that Yourself with very little effort...
look at the manual, search for the TMLH instruction, get no hits, search for the TML and the TMH instruction

to be succesfull in IT a bit ( better a few bytes ) of ingenuity does help

edited after peter reply to correct a brain check
as a partial excuse I keep all ( well-.. most of ) the versions of the relevant principles of operations manuals, and I clicked on the wrong one

this one ... has the right info
z/Architecture IBM Principles of Operation
SA22-7832-07

PeterHolland · Posted: Tue Dec 22, 2009 5:21 pm

TMLH and TMLL are new mnemonics for, the
ESA/390 instructions TEST UNDER MASK HIGH
(TMH) and TEST UNDER MASK LOW (TML),
respectively.

Found this in SA22-7832 z/Architecture Principles of Operation

Harsh Pawar · New User Joined: 04 Jun 2008 Posts: 25 Location: Noida

Thanks enrico and Peter that helped.

Summary for other users who are searching TMLH :

It is a RI type instruction ( New flavour of TM) where immediate data is of 2 bytes.

example:

TMLH R05,X'FFFF'

This will check 32-47 bits ( 2 bytes starting from 32nd bit of register 05) with mask of all 1.

Regards,
Harry