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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/113652] [14 regression] Failed bootstrap on ppc
 unrecognized opcode: `lfiwzx' with -mcpu=7450
Date: Thu, 28 Mar 2024 20:37:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113652

--- Comment #19 from Michael Meissner <meissner at gcc dot gnu.org> ---
When I wrote the VSX support many years ago, I intended that -mvsx enable a=
ll
of ISA 2.06, which includes ISA 2.05, etc.

My intentions were there 2 options for power7, one is the base ISA 2.07 sup=
port
for everything except the VSX registers (i.e. -mpopcntd), and the other ena=
bles
the floating point support.  The reason is the kernel needs to be built wit=
hout
floating point support.

If you say -mvsx, it should include the standard power7 integer instructions
(-mpopcntd), power6 server instructions (i.e. -mhard-dfp, -mcmpb, -mrecip,
-mpowerpc-gfxopt, and -mpowerpc-gpopt), etc.

VSX support assumes it can use lfiwax and lfiwzx.=