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Programming > Assembly 370 > Re: Assembler: ...
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Re: Assembler: alignment of machine instructions

by glen herrmannsfeldt <gah@[EMAIL PROTECTED] > Jul 13, 2005 at 09:27 PM

Michel Castelein wrote:
> A DC or DS instruction with a zero duplication factor forces boundary 
> alignment, even when the NOALIGN assembler option is in effect.
> 
> At the other hand, IMHO, the assembler always aligns machine
instructions on 
> a halfword boundary.
> 
> So, I'm wondering why the expansion of the SAVE macro begins with a DS
0H.
> 
> That's redundant, isn't it?
> 
> Or are there some historical reasons? If yes, which ones?

I would guess, not looking at the macro, that it is used for
any label on the SAVE.  If there isn't a label then it may generate
the DS without a label.

The MVT MACLIB is still around.

-- glen
 




 13 Posts in Topic:
Assembler: alignment of machine instructions
"Michel Castelein&qu  2005-07-13 23:13:45 
Re: Assembler: alignment of machine instructions
richgr@[EMAIL PROTECTED]   2005-07-13 21:37:48 
Re: Assembler: alignment of machine instructions
Binyamin Dissen <posti  2005-07-14 11:26:02 
Re: Assembler: alignment of machine instructions
"arargh" arargh  2005-07-13 18:00:03 
Re: Assembler: alignment of machine instructions
glen herrmannsfeldt <g  2005-07-13 21:27:03 
Re: Assembler: alignment of machine instructions
glen herrmannsfeldt <g  2005-07-19 13:43:28 
Re: Assembler: alignment of machine instructions
Binyamin Dissen <posti  2005-07-14 11:26:04 
Re: Assembler: alignment of machine instructions
"John Small" &l  2005-07-14 10:50:59 
Re: Assembler: alignment of machine instructions
glen herrmannsfeldt <g  2005-07-25 16:03:55 
Re: Assembler: alignment of machine instructions
"Michel Castelein&qu  2005-07-26 08:25:21 
Re: Assembler: alignment of machine instructions
"Sven Pran" <  2005-07-27 09:45:31 
Re: Assembler: alignment of machine instructions
beu@[EMAIL PROTECTED] (B  2005-07-27 20:50:58 
Re: Assembler: alignment of machine instructions
"Sven Pran" <  2005-07-28 00:11:47 

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tan12V112 Sat Jul 26 2:23:02 CDT 2008.