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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/102166] [i386] AMX intrinsics and macros not defined in
 C++
Date: Thu, 02 Sep 2021 03:55:36 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102166

--- Comment #7 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Thiago Macieira from comment #5)
> (In reply to Hongtao.liu from comment #4)
> > Because _tile_loadd is implemented as embedded assembly plus macros, if
> > __AMX_TILE__ is removed, no error will be reported if the user does not=
 use
> > the -mamx option, So this macro is added here, but obviously this is not
> > convenient for target_attribute. I think we'd better remove __AMX_TILE_=
_,
> > (not sure why c doesn't report the error).
>=20
> I suggest doing as Clang did and make it an intrinsic.

clang defines them as intrinsic because they support AMX register allocatio=
n (a
lot of effort), gcc does not support AMX register allocation for now, and
defining them as intrinsic + builtin doesn't seem to do much good except
provide some error messages.=