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Status Not under consideration
Workspace C/C++ and Fortran Compilers
Categories C/C++
Created by Guest
Created on Dec 17, 2014

RELATED IDEAS

Using CPACF with HW built-In instructions

ISV likes to use HW Crypto support of CPACF (see Principles of Operation) in their applications running on z/OS.
As of requiremts of their architecture and as of performance reasons, they do not use ICSF. So they have to use the CPACF instructions directly within their application, which is purly C-code.

Today they have to write some load-modules, which provide the HW instructions of CPACF, or they have to write inline assembler code. They would like to use the machine instructions directly.

Please, provide a solution to use CPACF without the detour of assembler.
This could be done in a way comparable as it is already possible with other complex machine instructions - so called Hardware-Built-In-Functions - which are provided by the C/C++-compiler on z/OS and USS.

For the ISV who requests such enhancement and also for other ISVs, a simplified way, which is not depending on using Assembler would be of a nice advantage.

Here is the ISV contact for this requirement:
Falk Reichbott
Leiter der technischen Entwicklung f?r die Produktfamilien FLIES? & FLAM?
limes datentechnik? gmbh
Louisenstrasse 21
D-61348 Bad Homburg v.d.H.
mobil: +49(0)1520-9827936
phone: +49(0)6172-5919-21
fax: +49(0)6172-5919-39
mailto: falk.reichbott@flam.de
web: www.flam.de & www.limes.de

Note: limes datentechnik provides applications for the Deutsche Bundesbank (federal bank of Germany)

Top priority is to get a solution for a C environment on z/OS and USS.

You might consider also Cobol and/or PL/I environments

Idea priority High
  • Guest
    Reply
    |     Apr 24, 2020

    Canceling due to no response from submitter since 2016.

  • Guest
    Reply
    |     Aug 10, 2016

    Resetting response to "Need More Information"

  • Guest
    Reply
    |     Jul 19, 2016

    Moving this to 'Need more information'

  • Guest
    Reply
    |     Jul 13, 2016

    Hi,

    Is this feature still needed?

    Also, can you please provide clarification on this statement in the RFE: "have to write inline assembler code. They would like to use the machine instructions directly." ?

    Given that inline assembler code is essentially using machine instruction directly, we are wondering if the reference here is to the support of inline assembler via Metal C where it imposes some overhead due to Metal C being available only with linkage C. FYA: z/OS XL C/C++ V2R2 provides support of inline assembler for all linkages under -qASM option.

  • Guest
    Reply
    |     May 26, 2016

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Programming Languages
    Product - C/C++ Compilers
    Component - Miscellaneous
    Operating system - IBM z/OS
    Source - SHARE

    For recording keeping, the previous attributes were:
    Brand - Servers and Systems Software
    Product family - z Systems Software
    Product - z/OS
    Component - LE
    Operating system - IBM z/OS
    Source - SHARE

  • Guest
    Reply
    |     Dec 29, 2014

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - zSeries Software
    Product - z/OS
    Component - LE
    Operating system - IBM z/OS

    For recording keeping, the previous attributes were:
    Brand - Servers and Systems Software
    Product family - zSeries Software
    Product - z/OS
    Component - Other
    Operating system - IBM z/OS

  • Guest
    Reply
    |     Dec 18, 2014

    Creating a new RFE based on Community RFE #63569 in product z/OS.

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