Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
1. Feature Overview:
Feature Id: [71193]
a. Name of Feature: [6.2 FEAT] gcc enhancements for more efficient floating point code generation
b. Feature Description
gcc enhancement for more efficient floating point code generation:
*Provide optimizations specifically directed at improving floating point intensive software running
on POWER hardware
* Add -mveclibabi=mass support
* improve code generation of copysign and parity on power6/power7 systems
* improve code generation of pow (x, 0.75) under fast math (machine independent change)
* add -mrecip switch to use the reciprocal estimate instructions
2. Feature Details:
Sponsor: LTC Toolchain
Architectures: ppc64,
Arch Specificity: both
Affects Kernel Modules: No
Delivery Mechanism: Backport
Category: other
Request Type: Package - Feature from IBM
d. Upstream Acceptance: Accepted
Sponsor Priority P2
f. Severity: high
IBM Confidential: No
Code Contribution: IBM code
g. Component Version Target: ---
3. Business Case
Improved floating point SPEC benchmarks by 10 - 15% will improve sales of Power hardware on RHEL
4. Primary contact at Red Hat:
John Jarvis, jjarvis
5. Primary contacts at Partner:
Project Management Contact:
Michael L. Hohnbaum, hbaum.com
Technical contact(s):
MICHAEL R. MEISSNER, mrmeissn.com
Comment 2RHEL Program Management
2011-04-06 20:44:10 UTC
Since RHEL 6.1 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.
Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.
------- Comment From hohnbaum.com 2011-05-24 12:46 EDT-------
Due to the difficulty in backporting this feature (requires bringing along several updates to support the specific item) compared to the expected benefit, the IBM Power Toolchain team has decided to quit this feature.