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Bug 2208908

Summary:	Supports -mdaz-ftz with GTS12/DTS12 and RHEL9 system compiler GCC11
Product:	Red Hat Enterprise Linux 9	Reporter:	Hongtao Liu <crazylht>
Component:	gcc	Assignee:	Marek Polacek <mpolacek>
gcc sub component:	system-version	QA Contact:	Václav Kadlčík <vkadlcik>
Status:	CLOSED ERRATA	Docs Contact:	Jacob Taylor Valdez <jvaldez>
Severity:	unspecified
Priority:	unspecified	CC:	ahajkova, fweimer, jakub, jvaldez, lkuprova, mpolacek, ohudlick, sipoyare, vkadlcik
Version:	unspecified	Keywords:	FeatureBackport, Triaged
Target Milestone:	rc	Flags:	pm-rhel: mirror+
Target Release:	9.1
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	gcc-11.4.1-2.el9	Doc Type:	Enhancement
Doc Text:	.A new `-mdaz-ftz` option in GCC on the 64-bit Intel architecture The system version of GNU Compiler Collection (GCC) on the 64-bit Intel architecture now supports the `-mdaz-ftz` option to enable flush-to-zero (FTZ) and denormals-are-zero (DAZ) flags in the MXCSR Control and Status Register.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-11-07 08:44:49 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Hongtao Liu 2023-05-22 02:03:54 UTC

Some users found the -mdaz-ftz option to be very useful, so I've backported the commit from main trunk to GCC 12 release branch:
r12-9536-gefcca6481eab18 and GCC 11 release branch: r11-10764-g003f9ab9e909a7

I also hope to downstream the patch to next GTS12/DTS12 and Rel9 system compiler GCC 11 release.

Releted GCC mail thread in https://gcc.gnu.org/pipermail/gcc-patches/2023-May/617425.html

Comment 1 Marek Polacek 2023-05-22 15:08:42 UTC

This should be part of the rebase to GCC 11.4.

Not plans to backport to GTS 12 gcc at this point.

Comment 2 Hongtao Liu 2023-05-23 03:45:22 UTC

Do we have GTS13 on Rel8?

Comment 3 Marek Polacek 2023-05-23 13:45:58 UTC

(In reply to Hongtao Liu from comment #2)
> Do we have GTS13 on Rel8?

There will be GTS 13 on RHEL8, yes.

Comment 4 Hongtao Liu 2023-05-24 06:41:01 UTC

(In reply to Marek Polacek from comment #3)
> (In reply to Hongtao Liu from comment #2)
> > Do we have GTS13 on Rel8?
> 
> There will be GTS 13 on RHEL8, yes.

I see, Thanks!

Comment 14 errata-xmlrpc 2023-11-07 08:44:49 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (gcc bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:6598