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Status Not under consideration
Workspace C/C++ and Fortran Compilers
Categories C/C++
Created by Guest
Created on May 16, 2018

RELATED IDEAS

Inline __asm() to communicate ARCHLVL to HLASM for system macros

When a z/OS system macro is embedded in a __asm() block, HLASM assumes ARCHLVL=1 which means the macro will use base+displacement branching, which fails in an inline __asm() block due to "no active USING". Most macros implement a MF=E form which gets around this problem, but many important macros (e.g. STORAGE) do not, or do not support other parameters on the MF=E form, requiring a separate MF=L declaration, which is less convenient in LE C due to lack of #pragma insert_asm support (which is understandable). IMHO, it is desirable that LE C implicitly embed a "SYSSTATE ARCHLVL=n" (where n is the applicable ARCHLVL for the compile) or take some other action to communicate the ARCHLVL to HLASM, so system macros (or any other macro) has an opportunity to generate code which leverages the machine architecture.

Idea priority Low
  • Guest
    Reply
    |     Dec 15, 2020

    IBM XL C/C++ for z/OS is a continuous delivery offering, and aims to satisfy the needs of a rapidly evolving market segment.
    Product strategy evolves and requirements are continuously evaluated against that strategy. This RFE has recently been reappraised against the wider product strategy and does not fall into IBMs delivery plans for the next 12 month. Whilst this RFE might be valid and we might look to deliver it longer term, this RFE is being rejected at this time. The requirement will be kept in our internal RFE backlog and might be reassessed in the future.

  • Guest
    Reply
    |     Oct 12, 2018

    This RFE is being accepted and will be updated once put into plan.

  • Guest
    Reply
    |     Jun 20, 2018

    This RFE is being investigated further and will be updated accordingly.

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