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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
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.
IBM is signed up to test and provide feedback, setting OtherQA.
------- 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.