IBM Z Software


This portal is to open public enhancement requests against IBM Z Software products. To view all of your ideas submitted to IBM, create and manage groups of Ideas, or create an idea explicitly set to be either visible by all (public) or visible only to you and IBM (private), use the IBM Unified Ideas Portal (https://ideas.ibm.com).


Shape the future of IBM!

We invite you to shape the future of IBM, including product roadmaps, by submitting ideas that matter to you the most. Here's how it works:

Search existing ideas

Start by searching and reviewing ideas and requests to enhance a product or service. Take a look at ideas others have posted, and add a comment, vote, or subscribe to updates on them if they matter to you. If you can't find what you are looking for,

Post your ideas

  1. Post an idea.

  2. Get feedback from the IBM team and other customers to refine your idea.

  3. Follow the idea through the IBM Ideas process.


Specific links you will want to bookmark for future use

Welcome to the IBM Ideas Portal (https://www.ibm.com/ideas) - Use this site to find out additional information and details about the IBM Ideas process and statuses.

IBM Unified Ideas Portal (https://ideas.ibm.com) - Use this site to view all of your ideas, create new ideas for any IBM product, or search for ideas across all of IBM.

ideasibm@us.ibm.com - Use this email to suggest enhancements to the Ideas process or request help from IBM for submitting your Ideas.

Add a new idea Subscribe
Status Not under consideration
Workspace C/C++ and Fortran Compilers
Categories C/C++
Created by Guest
Created on Oct 23, 2017

RELATED IDEAS

inline ASM DS incorrect load for long long

With inline ASM to initialize a long long variable using an ASM DS instruction in 31-bit mode, the compiler is only generating an 'L' instruction, which does not load the full 64-bit register representing the long long variable:

unsigned long long x;

000003 | * __asm(" DS 0H" : : "r"(x) : );
0000EC 4400 C1AC 000003 | EX r0,HOOK..STMT
0000F0 5820 D09C 000003 | L r2,x(,r13,156)

Compiling in 64-bit mode generates the expected 'LG' instruction:

000003 | * __asm(" DS 0H" : : "r"(x) : );
0000D0 4400 900C 000003 | EX r0,HOOK..STMT
0000D4 E360 48C0 0004 000003 | LG r6,x(,r4,2240)

===== TESTCASE:
void main(){
unsigned long long x;
__asm(" DS 0H" : : "r"(x) : );
}

$ xlc test.c -qlist -Wc,ASM

Idea priority Medium
  • 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
    |     Jan 25, 2018

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

  • Guest
    Reply
    |     Nov 30, 2017

    This RFE is still being investigated.

By clicking the "Post Comment" or "Submit Idea" button, you are agreeing to the IBM Ideas Portal Terms of Use.
Do not place IBM confidential, company confidential, or personal information into any field.