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Programming > Assembly 370 > Re: Assembler M...
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Re: Assembler Macros

by Steve Myers <noone@[EMAIL PROTECTED] > Jun 24, 2007 at 02:28 PM

Sven Pran wrote:
> "Binyamin Dissen" <postingid@[EMAIL PROTECTED]
> wrote in message 
> news:4ors73dulp8t0ir9utbtk9l1mkudgfmqqa@[EMAIL PROTECTED]
>> On Sun, 24 Jun 2007 12:53:03 +0200 "Sven Pran" <no.direct@[EMAIL PROTECTED]
>

>> wrote:
>>
>> :>Never use ST in situations like this (when the alignment of &FLD
>> :>is unknown), use STCM instead:
>>
>> :> STCM  1,B'1111',&FLD
>>
>> Checks his watch. Yes, it is 2007.
>>
>> This has not been an issue since the 370.
>>
>> There are very few instructions which require alignment.
> 
> Yes I know, that was a fact even in my years.
> Still there are two main reasons for using STCM rather than ST:
> 
> 1: Performance (not a very big issue but still ...)
> 2: Documentation (byte oriented rather than word oriented)
> 
> I suppose maybe the last reason is the more significant.
> 
> regards Sven 
> 
> 
I agree with the STCM solution, mainly because it is a sure way 
to avoid an Assembler warning message.  The performance issue is 
a nit; I'm not even sure you could measure a significant difference.
 




 31 Posts in Topic:
Assembler Macros
Karan <maranmeetsu@[EM  2007-06-22 01:35:53 
Re: Assembler Macros
Binyamin Dissen <posti  2007-06-22 12:43:01 
Re: Assembler Macros
"John W. Kennedy&quo  2007-06-22 08:52:05 
Re: Assembler Macros
SkippyPB <swiegand@[EM  2007-06-22 11:32:49 
Re: Assembler Macros
Steve Myers <noone@[EM  2007-06-22 17:07:32 
Re: Assembler Macros
SkippyPB <swiegand@[EM  2007-06-23 11:20:30 
Re: Assembler Macros
Steve Myers <noone@[EM  2007-06-23 12:29:06 
Re: Assembler Macros
"John Small" &l  2007-06-24 10:28:06 
Re: Assembler Macros
"Sven Pran" <  2007-06-24 12:53:03 
Re: Assembler Macros
Binyamin Dissen <posti  2007-06-24 16:19:10 
Re: Assembler Macros
"Sven Pran" <  2007-06-24 16:19:42 
Re: Assembler Macros
Steve Myers <noone@[EM  2007-06-24 14:28:56 
Re: Assembler Macros
"John W. Kennedy&quo  2007-06-24 22:22:20 
Re: Assembler Macros
Binyamin Dissen <posti  2007-06-25 10:14:30 
Re: Assembler Macros
"John W. Kennedy&quo  2007-06-25 15:59:30 
Re: Assembler Macros
spambait@[EMAIL PROTECTED  2007-06-26 15:36:45 
Re: Assembler Macros
woodag@[EMAIL PROTECTED]   2007-06-26 20:27:31 
Re: Assembler Macros
Steve Myers <noone@[EM  2007-06-26 18:27:55 
Re: Assembler Macros
"John W. Kennedy&quo  2007-06-26 22:08:05 
Re: Assembler Macros
glen herrmannsfeldt <g  2007-07-01 05:41:27 
Re: Assembler Macros
SkippyPB <swiegand@[EM  2007-06-25 11:04:23 
Re: Assembler Macros
"Sven Pran" <  2007-06-25 17:31:23 
Re: Assembler Macros
"John W. Kennedy&quo  2007-06-25 16:07:36 
Re: Assembler Macros
woodag@[EMAIL PROTECTED]   2007-06-25 23:40:34 
Re: Assembler Macros
Steve Myers <noone@[EM  2007-06-25 19:50:33 
Re: Assembler Macros
woodag@[EMAIL PROTECTED]   2007-06-26 00:25:40 
Re: Assembler Macros
"John W. Kennedy&quo  2007-06-25 20:41:51 
Re: Assembler Macros
Steve Myers <noone@[EM  2007-06-25 20:44:46 
Re: Assembler Macros
"John W. Kennedy&quo  2007-06-25 16:04:43 
Re: Assembler Macros
Barry Schwarz <schwarz  2007-06-23 10:02:07 
Re: Assembler Macros
Michel Hack <hack@[EMA  2007-06-26 13:06:18 

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