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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/113652] Failed bootstrap on ppc unrecognized opcode:
 `lfiwzx' with -mcpu=7450
Date: Tue, 30 Jan 2024 06:37:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113652

--- Comment #11 from Kewen Lin <linkw at gcc dot gnu.org> ---
In gcc, lfiwzx is guarded with TARGET_LFIWZX =3D> TARGET_POPCNTD (ISA2.06),=
 while
-mvsx will guarantee TARGET_POPCNTD (ISA_2_6_MASKS_SERVER) set, so it consi=
ders
lfiwzx is supported. IMHO the underlying philosophy is that having the
capability of vsx the supported ISA level is at least 2.06, lfiwzx is suppo=
rted
from 2.06, so it's supported.

But binutils seems not to follow it:
{"xvadddp",     XX3(60,96),     XX3_MASK,    PPCVSX,    PPCVLE,         {XT=
6,
XA6, XB6}},
{"lfiwzx",      X(31,887),      X_MASK,   POWER7|PPCA2, 0,              {FR=
T,
RA0, RB}},
Both are guarded with different masks and apparently PPCVSX doesn't enable
POWER7.

Hi Alan and Peter,

I wonder if assembler can enable POWER7 when PPCVSX gets enabled like what =
gcc
adopts now?=