| Summary: | Illegal instruction in Mesa with Pentium series CPU | ||
|---|---|---|---|
| Product: | Mesa | Reporter: | veelion (inactive account) <weiliang.chong> |
| Component: | Mesa core | Assignee: | mesa-dev |
| Status: | CLOSED FIXED | QA Contact: | |
| Severity: | normal | ||
| Priority: | medium | CC: | gordon.jin, mikael.gerdin, nian.wu, plaes, shuang.he |
| Version: | git | ||
| Hardware: | x86 (IA32) | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | Xsession.d script to set MESA_NO_ASM selectively | ||
|
Description
veelion (inactive account)
2006-10-22 22:43:28 UTC
Yes, the x86_64 code in Mesa is currently AMD only, as it uses 3dnow. Some functions probably could be fixed easily (those only using prefetch, prefetchw and femms by exchanging these instructions with the equivalent sse instructions), however some actually use the instructions of 3dnow operating on vec2 data, (pfmul, pfadd etc.), they look difficult to optimize with sse (they aren't optimized in the x86 sse path neither). As a workaround, use a build without assembly optimization (linux-dri instead of linux-dri-x86-64). The bug priority was upgraded (P2->high) with the bugzilla configuration change. I'm Changing the priority back to the normal one. Sorry for the spam. *** Bug 14421 has been marked as a duplicate of this bug. *** Why enhancement when it causes crash? *** Bug 15061 has been marked as a duplicate of this bug. *** *** Bug 15196 has been marked as a duplicate of this bug. *** Created attachment 16879 [details] Xsession.d script to set MESA_NO_ASM selectively I am trying to put together a workaround for Ubuntu and Debian (https://bugs.launchpad.net/bugs/87661), until this gets fixed the Right Way. Could anyone here please be so kind as to comment on this workaround? *** Bug 16225 has been marked as a duplicate of this bug. *** There is another "Illegal instruction" in xform4.S:
[Switching to Thread 46991100600320 (LWP 3791)]
_mesa_x86_64_transform_points4_3d_no_rot () at x86-64/xform4.S:225
225 prefetch (%rdx)
Current language: auto; currently asm
(gdb) bt
#0 _mesa_x86_64_transform_points4_3d_no_rot () at x86-64/xform4.S:225
#1 0x00002abcf80d6c29 in run_vertex_stage (ctx=0xa5b670,
stage=<value optimized out>) at tnl/t_vb_vertex.c:144
#2 0x00002abcf80cd1eb in _tnl_run_pipeline (ctx=0xa5b670)
at tnl/t_pipeline.c:158
#3 0x00002abcf802f0d0 in intelRunPipeline (ctx=0xa5b670) at intel_tris.c:906
#4 0x00002abcf80cd714 in _tnl_draw_prims (ctx=0xa5b670, arrays=0xa995b0,
prim=0xa97d94, nr_prims=1, ib=0x0, min_index=<value optimized out>,
max_index=3) at tnl/t_draw.c:402
#5 0x00002abcf80c58de in vbo_exec_vtx_flush (exec=0xa97b50)
at vbo/vbo_exec_draw.c:215
#6 0x00002abcf80c13fd in vbo_exec_FlushVertices (ctx=<value optimized out>,
flags=11064832) at vbo/vbo_exec_api.c:700
#7 0x00002abcf815eb4e in _mesa_ReadPixels (x=20, y=20, width=1, height=1,
format=6407, type=5126, pixels=0x7fffb4c40bf0) at main/drawpix.c:294
*** Bug 16385 has been marked as a duplicate of this bug. *** Fixed by commit 2b8d8989fb6f9c36baf166fc715182a1407ebadb to master. This patch has also been cherry-picked to the intel-2008-q3 branch as commit d13b5a0e87cb6d820a152e0373f017bc8fe9c49a. Mass version move, cvs -> git |
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