Bug 58341

Summary:	Enhancement for sys-libs/zlib-1.2.1-r2 (adding asm optimisations for x86)
Product:	Gentoo Linux	Reporter:	Stefan Briesenick (RETIRED) <sbriesen>
Component:	New packages	Assignee:	Gentoo's Team for Core System packages <base-system>
Status:	RESOLVED WONTFIX
Severity:	enhancement	CC:	ka0ttic, kfm
Priority:	High
Version:	unspecified
Hardware:	x86
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	zlib-1.2.1-r2.ebuild zlib-1.2.1-r2.ebuild.diff zlib-1.2.1-asm.patch

Description Stefan Briesenick (RETIRED) gentoo-dev

2004-07-25 16:47:26 UTC

I've made an enhancement for sys-libs/zlib-1.2.1-r2, so one can use the asm optimisations in the contrib directory for i586 and i686.

ATTENTION: NEW USE-FLAG -> 'asm' (Using asm optimisations where available)

could be used also elsewhere in future for this purpose.


Reproducible: Always
Steps to Reproduce:

Comment 1 Stefan Briesenick (RETIRED) gentoo-dev

2004-07-25 16:49:34 UTC

Created attachment 36153 [details]
zlib-1.2.1-r2.ebuild

New zlib-1.2.1-r2 ebuild

Comment 2 Stefan Briesenick (RETIRED) gentoo-dev

2004-07-25 16:50:17 UTC

Created attachment 36154 [details, diff]
zlib-1.2.1-r2.ebuild.diff

diff only, use it against original zlib-1.2.1-r2.ebuild

Comment 3 Stefan Briesenick (RETIRED) gentoo-dev

2004-07-25 16:52:12 UTC

Created attachment 36155 [details, diff]
zlib-1.2.1-asm.patch

Patch for Makefile.in. Put it into $FILESDIR.
could be probably merged with zlib-1.2.1-build-fPIC.patch

Comment 4 Robin Johnson archtester

2006-10-05 09:28:52 UTC

do these optimizations still outperform modern GCCs?

Comment 5 Stefan Briesenick (RETIRED) gentoo-dev

2006-10-05 15:15:33 UTC

don't know, never tested. On the other hand, my ebuild patch is somewhat outdated. I suggest to just close that bug as WONTFIX.

btw: it would be cool to strip "-ftree-vectorize" from CFLAGS for zlib, since it breaks many programs, incl. most GTK-apps. I don't know why, since many other apps just run fine with zlib compiled with -ftree-vectorize. But as soon as you compile zlib again w/o that option, that broken apps are instantly working.

Comment 6 Robin Johnson archtester

2006-10-05 15:51:39 UTC

thanks, closing.

the tree-vectorize depends on your gcc ;-).

Comment 7 Stefan Briesenick (RETIRED) gentoo-dev

2006-10-05 16:22:34 UTC

hmmm, I had the problem with 4.1.x (not tested anymore for some weeks). Is it fixed now?

Comment 8 Robin Johnson archtester

2006-10-05 16:44:05 UTC

i didn't have much in the way of GTK stuff to test with, but I haven't specifically seen problems - maybe open a seperate bug for tree-vectorize.