> -----Original Message-----
> From: IBM Mainframe Assembler List [mailto:ASSEMBLER-
> [email protected]] On Behalf Of Edward Jaffe
> Sent: Friday, December 03, 2010 3:42 PM
> To: [email protected]
> Subject: Long Displacements - What Good Are They?
>
> What good is the long displacement instruction set without MVC[Y] and
> CLC[Y]?
> What do the compilers use?

COBOL/PL1 or C/C++?  It makes a big difference.

C/C++ (and MetalC) will use the latest and greatest architecture instructions 
for ARCH(8),TUNE(8) (at V1R10, for z10) or ARCH(9),TUNE(9) (at V1R12 for z196) 
compiler options.  Enterprise COBOL never does.  I don't have access to 
Enterprise PL1, so I can't say what it uses.

Peter
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