https://sourceware.org/bugzilla/show_bug.cgi?id=25550
--- Comment #17 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jan Beulich from comment #16)
> (In reply to H.J. Lu from comment #14)
> > (In reply to Jan Beulich from comment #13)
> > > Well, that's what is described by my 2nd option, but it is (as explained)
> > > specifically not sufficient to merely exclude all uses of MMX registers to
> > > achieve this.
> >
> > It is no difference from
> >
> > if (i.has_regmmx
> > || i.tm.base_opcode == 0xf77 /* emms */
> > || i.tm.base_opcode == 0xf0e /* femms */)
> > x86_feature_2_used |= GNU_PROPERTY_X86_FEATURE_2_MMX;
>
> It is, for the case where no MMX register is used, but MMX state still gets
> engaged (like CVTPI2PS with a memory operand).
We need to handle these 2 like EMMS:
cvtpi2ps, 2, 0xf2a, None, 2, CpuSSE,
Modrm|IgnoreSize|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf|NoAVX, {
Qword|Unspecified|BaseIndex|RegMMX, RegXMM }
cvtpi2pd, 2, 0x660f2a, None, 2, CpuSSE2,
Modrm|IgnoreSize|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf|NoAVX, {
Qword|Unspecified|BaseIndex|RegMMX, RegXMM }
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