Re: [PATCH] x86: also suppress use of MMX insns

[Andrew Cooper <amc96@xxxxxxxx>]

On 20/07/2022 14:30, Jan Beulich wrote:
> Passing -mno-sse alone is not enough: The compiler may still find
> (questionable) reasons to use MMX insns. In particular with gcc12 use
> of MOVD+PUNPCKLDQ+MOVQ was observed in an apparent attempt to auto-
> vectorize the storing of two adjacent zeroes, 32 bits each.
>
> Reported-by: ChrisD <chris@xxxxxxxxxxxx>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

But while we're at it, what else might we have to clobber to stop
nonsense like this?  x87 and avx come to mind.