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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/31335] Compile glibc with -march=x86-64-v3 should disable
 FMA4 multi-arch version
Date: Thu, 04 Apr 2024 06:15:02 +0000
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X-Bugzilla-Product: glibc
X-Bugzilla-Component: math
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31335

--- Comment #3 from Florian Weimer <fweimer at redhat dot com> ---
Has this bug been fixed?

I ran into this issue while trying to build glibc with -mapxf. This option =
is
logically incompatible with -mfma4, although not rejected by GCC. I don't
expect there to be any hardware that supports this combination, and GCC
generates assembly that is incompatible with GAS:

/tmp/ccuidrGh.s: Assembler messages:
/tmp/ccuidrGh.s:451: Error: extended GPR cannot be used as base/index for
`vfmaddsd'
/tmp/ccuidrGh.s:702: Error: extended GPR cannot be used as base/index for
`vfmaddsd'
/tmp/ccuidrGh.s:821: Error: extended GPR cannot be used as base/index for
`vfmaddsd'
/tmp/ccuidrGh.s:1449: Error: extended GPR cannot be used as base/index for
`vfmaddsd'
/tmp/ccuidrGh.s:1591: Error: extended GPR cannot be used as base/index for
`vfmaddsd'
/tmp/ccuidrGh.s:1709: Error: extended GPR cannot be used as base/index for
`vfmaddsd'

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