Your message dated Sat, 17 Feb 2007 18:50:07 +0100
with message-id <[EMAIL PROTECTED]>
and subject line Bug#187303: mesag3 3dnow optimization bug
has caused the attached Bug report to be marked as done.
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--- Begin Message ---
Package: mesag3
Version: 5.0.0-5
Mesa 5.0.0 has a bug in its 3DNOW optimizations. This message from their
development list mentions it:
http://sourceforge.net/mailarchive/forum.php?thread_id=1890399&forum_id=5154
The bug results in rendering errors like those shown by nightly tests like
these:
http://www.vtk.org/Testing/Sites/hythloth.kitware/Linux-gcc322/20030325-0300-Nightly/Test.html
http://www.vtk.org/Testing/Sites/hythloth.kitware/Linux-gcc322/20030325-0300-Nightly/Results/__Graphics_Testing_Tcl_dataSetSurfaceFilter-image.html
This bug has not been fixed, but the CVS version of mesa comments out a
line to prevent the buggy code from running (disabling the optimization).
This change is not included in Mesa 5.0.1.
I've attached a patch file that should be usable as a debian patch. The
contents of the file are also listed below inline in this message. I
would appreciate it if this patch could be added to the mesag3 package.
Currently I have to build my software using a hand-built version of the
mesa library because the version of libGL installed by Debian breaks on my
Athlon processor. The software will then not work on other people's
Debian systems using mesag3 on an Athlon processor.
Thanks for your time,
-Brad
Contents of "mesag3-3dnow-norm-disable.patch":
diff -c3pr mesa-5.0.0-orig/src/X86/3dnow.c mesa-5.0.0/src/X86/3dnow.c
*** mesa-5.0.0-orig/src/X86/3dnow.c Wed Aug 21 09:07:17 2002
--- mesa-5.0.0/src/X86/3dnow.c Wed Apr 2 10:41:45 2003
*************** void _mesa_init_3dnow_transform_asm( voi
*** 79,85 ****
--- 79,88 ----
ASSIGN_XFORM_GROUP( 3dnow, 3 );
ASSIGN_XFORM_GROUP( 3dnow, 4 );
+ /* There's a bug somewhere in the 3dnow_normal.S file that causes
+ * bad shading. Disable for now.
ASSIGN_NORM_GROUP( 3dnow );
+ */
#ifdef DEBUG
_math_test_all_transform_functions( "3DNow!" );
diff -c3pr mesa-5.0.0-orig/src/X86/3dnow.c mesa-5.0.0/src/X86/3dnow.c
*** mesa-5.0.0-orig/src/X86/3dnow.c Wed Aug 21 09:07:17 2002
--- mesa-5.0.0/src/X86/3dnow.c Wed Apr 2 10:41:45 2003
*************** void _mesa_init_3dnow_transform_asm( voi
*** 79,85 ****
--- 79,88 ----
ASSIGN_XFORM_GROUP( 3dnow, 3 );
ASSIGN_XFORM_GROUP( 3dnow, 4 );
+ /* There's a bug somewhere in the 3dnow_normal.S file that causes
+ * bad shading. Disable for now.
ASSIGN_NORM_GROUP( 3dnow );
+ */
#ifdef DEBUG
_math_test_all_transform_functions( "3DNow!" );
--- End Message ---
--- Begin Message ---
Version: 6.0.1-1
Closing since it has been fixed in 5.0.1 as the submitter said (but only
uploaded within 6.0.1-1).
Brice
--- End Message ---
