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Programming > Assembly 370 > Re: S/360 HER, ...
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Re: S/360 HER, HDR

by glen herrmannsfeldt <gah@[EMAIL PROTECTED] > Jan 5, 2006 at 12:41 AM

robin wrote:

(snip)

> Not every program needs SQRT.  In any case, it was probably
> done by invoking a function, in which case, storage requirements
> would not have been an issue.

>     Many programs, however, routinely require division by 2,
> and as there may be a number of these in a program,
> the amount of extra storage required would become a drawback.

(snip)

> The crux was that for general use, the original HER and HDR
> were not as attractive as they would seem.

Someone claimed that they were originally to speed up square root,
and I don't remember ever seeing them used anywhere else.  It does
seem that they could be useful, though.

-- glen
 




 16 Posts in Topic:
Re: S/360
"robin" <rob  2005-12-20 03:51:25 
Re: S/360
glen herrmannsfeldt <g  2005-12-20 00:43:30 
Re: S/360
"John W. Kennedy&quo  2005-12-20 10:08:37 
Re: S/360
"James J. Weinkam&qu  2005-12-20 21:46:26 
Re: S/360
Peter Flass <Peter_Fla  2005-12-21 00:53:26 
Re: S/360
"James J. Weinkam&qu  2005-12-21 07:42:47 
Re: S/360
glen herrmannsfeldt <g  2005-12-20 21:46:21 
Re: S/360
"robin" <rob  2005-12-31 07:39:09 
Re: S/360
glen herrmannsfeldt <g  2006-01-02 12:16:22 
Re: S/360 HER, HDR
"robin" <rob  2006-01-03 01:56:13 
Re: S/360 HER, HDR
glen herrmannsfeldt <g  2006-01-04 02:11:31 
Re: S/360 HER, HDR
"robin" <rob  2006-01-04 15:45:54 
Re: S/360 HER, HDR
glen herrmannsfeldt <g  2006-01-05 00:41:33 
Re: S/360 HER, HDR
"robin" <rob  2006-01-06 00:04:42 
Re: S/360
"John W. Kennedy&quo  2005-12-20 10:08:04 
Re: S/360
"robin" <rob  2005-12-21 07:10:39 

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