[PATCH] x86: Clean up and improve FPU inline assembly

[Florian Weimer]

* Uros Bizjak:

> Clean up and improve x86 FPU inline assembly:
>
>   * Remove obsolete "*&" GCC asm memory operand workaround
>
>   * Use %v prefix to emit VEX prefixed insns for AVX targets
>
>   * Use \t and \n\t separators consistently
>
> Signed-off-by: Uros Bizjak <ubizjak@gmail.com>

Reviewed-by: Florian Weimer <fweimer@redhat.com>

I'm not particularly fond of the \t, but I probably won't change any of
this code, so it doesn't matter to me.

The %v changes make the VEX prefix more consistent.  I suppose that's
okay.  But it's puzzling to me my the VEX variant is advantageous, given
that its encoding is one byte longer.  I wouldn't consider it a SIMD
instruction, so the VEX vs legacy mixing shouldn't apply?

Thanks,
Florian