Re: architectural goals, Byte Addressability And Beyond

On Thu, 30 May 2024 14:08:04 GMT
scott@slp53.sl.home (Scott Lurndal) wrote:

Thomas Koenig <tkoenig@netcologne.de> writes:

Anton Ertl <anton@mips.complang.tuwien.ac.at> schrieb:
 

It's still marketing.  I have listened to several talks about
converting S/360 programs to C code that can be run on arbitrary
hardware, and IBM's audience hears about such things, too, so IBM's
sales force has to provide reasons for not jumping ship.  And all
these new features that sound like they are useful are such
reasons. Things like decimal FP and CU14.
>
The fact that these feature provide no actual benefit is their best
property: 

>
No actual benefit?
>
If you make such a strong statement, I assume that you have done a
thorough analysis of this feature for typical mainframe workloads
and can support your claims with benchmarks. 

 
Note that the feature was introduced in Znext (2012).   That it is
still there must indicate that it gets some usage.
 

Not necessarily.
After feature was given publicly documented opcode it's very hard to
remove it.
Naturally, I don't know if this particular feature got publicly
documented opcode and don't know where too look.