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* [Bug math/26534] New: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system
@ 2020-08-25 14:55 ondra.hosek at gmail dot com
2020-08-25 14:57 ` [Bug math/26534] " ondra.hosek at gmail dot com
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: ondra.hosek at gmail dot com @ 2020-08-25 14:55 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=26534
Bug ID: 26534
Summary: libm.so 2.32 SIGILL in pow() due to FMA4 instruction
on non-FMA4 system
Product: glibc
Version: 2.32
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: ondra.hosek at gmail dot com
Target Milestone: ---
Programs calling libm's pow() exit with SIGILL because it executes the FMA4
instruction
vfmaddsd %xmm4,0x8(%rdx),%xmm6,%xmm0
on a system that does not support FMA4.
This is apparently due to a regression in commit
107e6a3c2212ba7a3a4ec7cae8d82d73f7c95d0b file
sysdeps/x86_64/fpu/multiarch/ifunc-fma4.h where the ifunc checks for "FMA"
instead of "FMA4".
Originally reported to Arch Linux: https://bugs.archlinux.org/task/67715
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug math/26534] libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system 2020-08-25 14:55 [Bug math/26534] New: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system ondra.hosek at gmail dot com @ 2020-08-25 14:57 ` ondra.hosek at gmail dot com 2020-08-25 15:23 ` schwab@linux-m68k.org ` (6 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: ondra.hosek at gmail dot com @ 2020-08-25 14:57 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26534 --- Comment #1 from Ondřej Hošek <ondra.hosek at gmail dot com> --- Created attachment 12797 --> https://sourceware.org/bugzilla/attachment.cgi?id=12797&action=edit patch fixing the regression (correcting typo/backspace-o) -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug math/26534] libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system 2020-08-25 14:55 [Bug math/26534] New: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system ondra.hosek at gmail dot com 2020-08-25 14:57 ` [Bug math/26534] " ondra.hosek at gmail dot com @ 2020-08-25 15:23 ` schwab@linux-m68k.org 2020-08-25 16:25 ` hjl.tools at gmail dot com ` (5 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: schwab@linux-m68k.org @ 2020-08-25 15:23 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26534 Andreas Schwab <schwab@linux-m68k.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hjl.tools at gmail dot com -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug math/26534] libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system 2020-08-25 14:55 [Bug math/26534] New: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system ondra.hosek at gmail dot com 2020-08-25 14:57 ` [Bug math/26534] " ondra.hosek at gmail dot com 2020-08-25 15:23 ` schwab@linux-m68k.org @ 2020-08-25 16:25 ` hjl.tools at gmail dot com 2020-08-26 2:27 ` ondra.hosek at gmail dot com ` (4 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: hjl.tools at gmail dot com @ 2020-08-25 16:25 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26534 H.J. Lu <hjl.tools at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2020-08-25 Status|UNCONFIRMED |NEW Ever confirmed|0 |1 --- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Ondřej Hošek from comment #1) > Created attachment 12797 [details] > patch fixing the regression (correcting typo/backspace-o) Can you send it to the glibc mailing list? Thanks. -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug math/26534] libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system 2020-08-25 14:55 [Bug math/26534] New: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system ondra.hosek at gmail dot com ` (2 preceding siblings ...) 2020-08-25 16:25 ` hjl.tools at gmail dot com @ 2020-08-26 2:27 ` ondra.hosek at gmail dot com 2020-09-03 22:37 ` slyfox at inbox dot ru ` (3 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: ondra.hosek at gmail dot com @ 2020-08-26 2:27 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26534 --- Comment #3 from Ondřej Hošek <ondra.hosek at gmail dot com> --- Patch sent to the mailing list: https://sourceware.org/pipermail/libc-alpha/2020-August/117267.html -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug math/26534] libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system 2020-08-25 14:55 [Bug math/26534] New: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system ondra.hosek at gmail dot com ` (3 preceding siblings ...) 2020-08-26 2:27 ` ondra.hosek at gmail dot com @ 2020-09-03 22:37 ` slyfox at inbox dot ru 2020-09-03 23:04 ` ondra.hosek at gmail dot com ` (2 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: slyfox at inbox dot ru @ 2020-09-03 22:37 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26534 Sergei Trofimovich <slyfox at inbox dot ru> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |slyfox at inbox dot ru --- Comment #4 from Sergei Trofimovich <slyfox at inbox dot ru> --- Gentoo also encountered it: https://bugs.gentoo.org/740110 Looks like patch was merged into master as: https://sourceware.org/git/?p=glibc.git;a=patch;h=23af890b3f04e80da783ba64e6b6d94822e01d54 -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug math/26534] libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system 2020-08-25 14:55 [Bug math/26534] New: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system ondra.hosek at gmail dot com ` (4 preceding siblings ...) 2020-09-03 22:37 ` slyfox at inbox dot ru @ 2020-09-03 23:04 ` ondra.hosek at gmail dot com 2020-09-04 11:46 ` fweimer at redhat dot com 2021-01-20 9:00 ` fweimer at redhat dot com 7 siblings, 0 replies; 9+ messages in thread From: ondra.hosek at gmail dot com @ 2020-09-03 23:04 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26534 Ondřej Hošek <ondra.hosek at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|NEW |RESOLVED --- Comment #5 from Ondřej Hošek <ondra.hosek at gmail dot com> --- Yup, and backported to the 2.32 branch in https://sourceware.org/git/?p=glibc.git;a=commit;h=cebc01cbfd6c257f329e818b68bb1b2eef2afe09 I guess I can change the status to RESOLVED FIXED now... -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug math/26534] libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system 2020-08-25 14:55 [Bug math/26534] New: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system ondra.hosek at gmail dot com ` (5 preceding siblings ...) 2020-09-03 23:04 ` ondra.hosek at gmail dot com @ 2020-09-04 11:46 ` fweimer at redhat dot com 2021-01-20 9:00 ` fweimer at redhat dot com 7 siblings, 0 replies; 9+ messages in thread From: fweimer at redhat dot com @ 2020-09-04 11:46 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26534 Florian Weimer <fweimer at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |2.33 Flags| |security- CC| |fweimer at redhat dot com -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug math/26534] libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system 2020-08-25 14:55 [Bug math/26534] New: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system ondra.hosek at gmail dot com ` (6 preceding siblings ...) 2020-09-04 11:46 ` fweimer at redhat dot com @ 2021-01-20 9:00 ` fweimer at redhat dot com 7 siblings, 0 replies; 9+ messages in thread From: fweimer at redhat dot com @ 2021-01-20 9:00 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26534 Florian Weimer <fweimer at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://bugzilla.redhat.com | |/show_bug.cgi?id=1918115 -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2021-01-20 9:00 UTC | newest] Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-08-25 14:55 [Bug math/26534] New: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system ondra.hosek at gmail dot com 2020-08-25 14:57 ` [Bug math/26534] " ondra.hosek at gmail dot com 2020-08-25 15:23 ` schwab@linux-m68k.org 2020-08-25 16:25 ` hjl.tools at gmail dot com 2020-08-26 2:27 ` ondra.hosek at gmail dot com 2020-09-03 22:37 ` slyfox at inbox dot ru 2020-09-03 23:04 ` ondra.hosek at gmail dot com 2020-09-04 11:46 ` fweimer at redhat dot com 2021-01-20 9:00 ` fweimer at redhat dot com
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